# Sessions ## Create Session `client.Beta.Sessions.New(ctx, params) (*BetaManagedAgentsSession, error)` **post** `/v1/sessions` Create Session ### Parameters - `params BetaSessionNewParams` - `Agent param.Field[BetaSessionNewParamsAgentUnion]` Body param: Agent identifier. Accepts the `agent` ID string, which pins the latest version for the session, or an `agent` object with both id and version specified. - `string` - `type BetaManagedAgentsAgentParamsResp struct{…}` Specification for an Agent. Provide a specific `version` or use the short-form `agent="agent_id"` for the most recent version - `ID string` The `agent` ID. - `Type BetaManagedAgentsAgentParamsType` - `const BetaManagedAgentsAgentParamsTypeAgent BetaManagedAgentsAgentParamsType = "agent"` - `Version int64` The specific `agent` version to use. Omit to use the latest version. Must be at least 1 if specified. - `EnvironmentID param.Field[string]` Body param: ID of the `environment` defining the container configuration for this session. - `Metadata param.Field[map[string, string]]` Body param: Arbitrary key-value metadata attached to the session. Maximum 16 pairs, keys up to 64 chars, values up to 512 chars. - `Resources param.Field[[]BetaSessionNewParamsResourceUnion]` Body param: Resources (e.g. repositories, files) to mount into the session's container. - `type BetaManagedAgentsGitHubRepositoryResourceParamsResp struct{…}` Mount a GitHub repository into the session's container. - `AuthorizationToken string` GitHub authorization token used to clone the repository. - `Type BetaManagedAgentsGitHubRepositoryResourceParamsType` - `const BetaManagedAgentsGitHubRepositoryResourceParamsTypeGitHubRepository BetaManagedAgentsGitHubRepositoryResourceParamsType = "github_repository"` - `URL string` Github URL of the repository - `Checkout BetaManagedAgentsGitHubRepositoryResourceParamsCheckoutUnionResp` Branch or commit to check out. Defaults to the repository's default branch. - `type BetaManagedAgentsBranchCheckout struct{…}` - `Name string` Branch name to check out. - `Type BetaManagedAgentsBranchCheckoutType` - `const BetaManagedAgentsBranchCheckoutTypeBranch BetaManagedAgentsBranchCheckoutType = "branch"` - `type BetaManagedAgentsCommitCheckout struct{…}` - `Sha string` Full commit SHA to check out. - `Type BetaManagedAgentsCommitCheckoutType` - `const BetaManagedAgentsCommitCheckoutTypeCommit BetaManagedAgentsCommitCheckoutType = "commit"` - `MountPath string` Mount path in the container. Defaults to `/workspace/`. - `type BetaManagedAgentsFileResourceParamsResp struct{…}` Mount a file uploaded via the Files API into the session. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileResourceParamsType` - `const BetaManagedAgentsFileResourceParamsTypeFile BetaManagedAgentsFileResourceParamsType = "file"` - `MountPath string` Mount path in the container. Defaults to `/mnt/session/uploads/`. - `type BetaManagedAgentsMemoryStoreResourceParamResp struct{…}` Parameters for attaching a memory store to an agent session. - `MemoryStoreID string` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type BetaManagedAgentsMemoryStoreResourceParamType` - `const BetaManagedAgentsMemoryStoreResourceParamTypeMemoryStore BetaManagedAgentsMemoryStoreResourceParamType = "memory_store"` - `Access BetaManagedAgentsMemoryStoreResourceParamAccess` Access mode for an attached memory store. - `const BetaManagedAgentsMemoryStoreResourceParamAccessReadWrite BetaManagedAgentsMemoryStoreResourceParamAccess = "read_write"` - `const BetaManagedAgentsMemoryStoreResourceParamAccessReadOnly BetaManagedAgentsMemoryStoreResourceParamAccess = "read_only"` - `Instructions string` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `Title param.Field[string]` Body param: Human-readable session title. - `VaultIDs param.Field[[]string]` Body param: Vault IDs for stored credentials the agent can use during the session. - `Betas param.Field[[]AnthropicBeta]` Header param: Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsSession struct{…}` A Managed Agents `session`. - `ID string` - `Agent BetaManagedAgentsSessionAgent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Multiagent BetaManagedAgentsSessionMultiagentCoordinator` Resolved coordinator topology with full agent definitions for each roster member. - `Agents []BetaManagedAgentsSessionThreadAgent` Full `agent` definitions the coordinator may spawn as session threads. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `Type BetaManagedAgentsSessionMultiagentCoordinatorType` - `const BetaManagedAgentsSessionMultiagentCoordinatorTypeCoordinator BetaManagedAgentsSessionMultiagentCoordinatorType = "coordinator"` - `Name string` - `Skills []BetaManagedAgentsSessionAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `System string` - `Tools []BetaManagedAgentsSessionAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `type BetaManagedAgentsMCPToolset struct{…}` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Type BetaManagedAgentsSessionAgentType` - `const BetaManagedAgentsSessionAgentTypeAgent BetaManagedAgentsSessionAgentType = "agent"` - `Version int64` - `ArchivedAt Time` A timestamp in RFC 3339 format - `CreatedAt Time` A timestamp in RFC 3339 format - `EnvironmentID string` - `Metadata map[string, string]` - `OutcomeEvaluations []BetaManagedAgentsOutcomeEvaluationResource` Per-outcome evaluation state. One entry per define_outcome event sent to the session. - `CompletedAt Time` A timestamp in RFC 3339 format - `Description string` What the agent should produce. - `Explanation string` Grader's verdict text from the most recent evaluation. For satisfied, explains why criteria are met; for needs_revision (intermediate), what's missing; for failed, why unrecoverable. - `Iteration int64` 0-indexed revision cycle the outcome is currently on. - `OutcomeID string` Server-generated outc_ ID for this outcome. - `Result string` Current evaluation state. `pending` before the agent begins work; `running` while producing or revising; `evaluating` while the grader scores; `satisfied`/`max_iterations_reached`/`failed`/`interrupted` are terminal. - `Type BetaManagedAgentsOutcomeEvaluationResourceType` - `const BetaManagedAgentsOutcomeEvaluationResourceTypeOutcomeEvaluation BetaManagedAgentsOutcomeEvaluationResourceType = "outcome_evaluation"` - `Resources []BetaManagedAgentsSessionResourceUnion` - `type BetaManagedAgentsGitHubRepositoryResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `MountPath string` - `Type BetaManagedAgentsGitHubRepositoryResourceType` - `const BetaManagedAgentsGitHubRepositoryResourceTypeGitHubRepository BetaManagedAgentsGitHubRepositoryResourceType = "github_repository"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `URL string` - `Checkout BetaManagedAgentsGitHubRepositoryResourceCheckoutUnion` - `type BetaManagedAgentsBranchCheckout struct{…}` - `Name string` Branch name to check out. - `Type BetaManagedAgentsBranchCheckoutType` - `const BetaManagedAgentsBranchCheckoutTypeBranch BetaManagedAgentsBranchCheckoutType = "branch"` - `type BetaManagedAgentsCommitCheckout struct{…}` - `Sha string` Full commit SHA to check out. - `Type BetaManagedAgentsCommitCheckoutType` - `const BetaManagedAgentsCommitCheckoutTypeCommit BetaManagedAgentsCommitCheckoutType = "commit"` - `type BetaManagedAgentsFileResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `FileID string` - `MountPath string` - `Type BetaManagedAgentsFileResourceType` - `const BetaManagedAgentsFileResourceTypeFile BetaManagedAgentsFileResourceType = "file"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsMemoryStoreResource struct{…}` A memory store attached to an agent session. - `MemoryStoreID string` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type BetaManagedAgentsMemoryStoreResourceType` - `const BetaManagedAgentsMemoryStoreResourceTypeMemoryStore BetaManagedAgentsMemoryStoreResourceType = "memory_store"` - `Access BetaManagedAgentsMemoryStoreResourceAccess` Access mode for an attached memory store. - `const BetaManagedAgentsMemoryStoreResourceAccessReadWrite BetaManagedAgentsMemoryStoreResourceAccess = "read_write"` - `const BetaManagedAgentsMemoryStoreResourceAccessReadOnly BetaManagedAgentsMemoryStoreResourceAccess = "read_only"` - `Description string` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Instructions string` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `MountPath string` Filesystem path where the store is mounted in the session container, e.g. /mnt/memory/user-preferences. Derived from the store's name. Output-only. - `Name string` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. - `Stats BetaManagedAgentsSessionStats` Timing statistics for a session. - `ActiveSeconds float64` Cumulative time in seconds the session spent in running status. Excludes idle time. - `DurationSeconds float64` Elapsed time since session creation in seconds. For terminated sessions, frozen at the final update. - `Status BetaManagedAgentsSessionStatus` SessionStatus enum - `const BetaManagedAgentsSessionStatusRescheduling BetaManagedAgentsSessionStatus = "rescheduling"` - `const BetaManagedAgentsSessionStatusRunning BetaManagedAgentsSessionStatus = "running"` - `const BetaManagedAgentsSessionStatusIdle BetaManagedAgentsSessionStatus = "idle"` - `const BetaManagedAgentsSessionStatusTerminated BetaManagedAgentsSessionStatus = "terminated"` - `Title string` - `Type BetaManagedAgentsSessionType` - `const BetaManagedAgentsSessionTypeSession BetaManagedAgentsSessionType = "session"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `Usage BetaManagedAgentsSessionUsage` Cumulative token usage for a session across all turns. - `CacheCreation BetaManagedAgentsCacheCreationUsage` Prompt-cache creation token usage broken down by cache lifetime. - `Ephemeral1hInputTokens int64` Tokens used to create 1-hour ephemeral cache entries. - `Ephemeral5mInputTokens int64` Tokens used to create 5-minute ephemeral cache entries. - `CacheReadInputTokens int64` Total tokens read from prompt cache. - `InputTokens int64` Total input tokens consumed across all turns. - `OutputTokens int64` Total output tokens generated across all turns. - `VaultIDs []string` Vault IDs attached to the session at creation. Empty when no vaults were supplied. - `DeploymentID string` Deployment ID when the session was created from a deployment reference. Null otherwise. ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) betaManagedAgentsSession, err := client.Beta.Sessions.New(context.TODO(), anthropic.BetaSessionNewParams{ Agent: anthropic.BetaSessionNewParamsAgentUnion{ OfString: anthropic.String("agent_011CZkYpogX7uDKUyvBTophP"), }, EnvironmentID: "env_011CZkZ9X2dpNyB7HsEFoRfW", }) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", betaManagedAgentsSession.ID) } ``` #### Response ```json { "id": "sesn_011CZkZAtmR3yMPDzynEDxu7", "agent": { "id": "agent_011CZkYpogX7uDKUyvBTophP", "description": "A general-purpose starter agent.", "mcp_servers": [ { "name": "example-mcp", "type": "url", "url": "https://example-server.modelcontextprotocol.io/sse" } ], "model": { "id": "claude-sonnet-4-6", "speed": "standard" }, "multiagent": { "agents": [ { "id": "agent_011CZkYqphY8vELVzwCUpqiQ", "description": "A focused research subagent.", "mcp_servers": [ { "name": "example-mcp", "type": "url", "url": "https://example-server.modelcontextprotocol.io/sse" } ], "model": { "id": "claude-sonnet-4-6", "speed": "standard" }, "name": "Researcher", "skills": [ { "skill_id": "xlsx", "type": "anthropic", "version": "1" } ], "system": "You are a research subagent that gathers and summarises sources for the coordinating agent.", "tools": [ { "configs": [ { "enabled": true, "name": "bash", "permission_policy": { "type": "always_allow" } } ], "default_config": { "enabled": true, "permission_policy": { "type": "always_ask" } }, "type": "agent_toolset_20260401" } ], "type": "agent", "version": 1 } ], "type": "coordinator" }, "name": "My First Agent", "skills": [ { "skill_id": "xlsx", "type": "anthropic", "version": "1" }, { "skill_id": "skill_011CZkZFNu9hAbo3jZPRgTlx", "type": "custom", "version": "2" } ], "system": "You are a general-purpose agent that can research, write code, run commands, and use connected tools to complete the user's task end to end.", "tools": [ { "configs": [ { "enabled": true, "name": "bash", "permission_policy": { "type": "always_allow" } } ], "default_config": { "enabled": true, "permission_policy": { "type": "always_ask" } }, "type": "agent_toolset_20260401" } ], "type": "agent", "version": 1 }, "archived_at": null, "created_at": "2026-03-15T10:00:00Z", "environment_id": "env_011CZkZ9X2dpNyB7HsEFoRfW", "metadata": {}, "outcome_evaluations": [ { "completed_at": "2026-03-15T10:02:31Z", "description": "Produce a 2-page summary as summary.md", "explanation": "All five sections present with inline citations.", "iteration": 0, "outcome_id": "outc_011CZkZRSw2kEfs6ncTVljxP", "result": "satisfied", "type": "outcome_evaluation" } ], "resources": [ { "id": "sesrsc_011CZkZBJq5dWxk9fVLNcPht", "created_at": "2026-03-15T10:00:00Z", "file_id": "file_011CNha8iCJcU1wXNR6q4V8w", "mount_path": "/uploads/receipt.pdf", "type": "file", "updated_at": "2026-03-15T10:00:00Z" }, { "id": "sesrsc_011CZkZCKr6eXyl0gWMOdQiu", "created_at": "2026-03-15T10:00:00Z", "mount_path": "/workspace/example-repo", "type": "github_repository", "updated_at": "2026-03-15T10:00:00Z", "url": "https://github.com/example-org/example-repo", "checkout": { "name": "main", "type": "branch" } } ], "stats": { "active_seconds": 0, "duration_seconds": 0 }, "status": "idle", "title": "Order #1234 inquiry", "type": "session", "updated_at": "2026-03-15T10:00:00Z", "usage": { "cache_creation": { "ephemeral_1h_input_tokens": 0, "ephemeral_5m_input_tokens": 0 }, "cache_read_input_tokens": 0, "input_tokens": 0, "output_tokens": 0 }, "vault_ids": [ "vlt_011CZkZDLs7fYzm1hXNPeRjv" ], "deployment_id": "deployment_id" } ``` ## List Sessions `client.Beta.Sessions.List(ctx, params) (*PageCursor[BetaManagedAgentsSession], error)` **get** `/v1/sessions` List Sessions ### Parameters - `params BetaSessionListParams` - `AgentID param.Field[string]` Query param: Filter sessions created with this agent ID. - `AgentVersion param.Field[int64]` Query param: Filter by agent version. Only applies when agent_id is also set. - `CreatedAtGt param.Field[Time]` Query param: Return sessions created after this time (exclusive). - `CreatedAtGte param.Field[Time]` Query param: Return sessions created at or after this time (inclusive). - `CreatedAtLt param.Field[Time]` Query param: Return sessions created before this time (exclusive). - `CreatedAtLte param.Field[Time]` Query param: Return sessions created at or before this time (inclusive). - `DeploymentID param.Field[string]` Query param: Filter sessions created by this deployment ID. - `IncludeArchived param.Field[bool]` Query param: When true, includes archived sessions. Default: false (exclude archived). - `Limit param.Field[int64]` Query param: Maximum number of results to return. - `MemoryStoreID param.Field[string]` Query param: Filter sessions whose resources contain a memory_store with this memory store ID. - `Order param.Field[BetaSessionListParamsOrder]` Query param: Sort direction for results, ordered by created_at. Defaults to desc (newest first). - `const BetaSessionListParamsOrderAsc BetaSessionListParamsOrder = "asc"` - `const BetaSessionListParamsOrderDesc BetaSessionListParamsOrder = "desc"` - `Page param.Field[string]` Query param: Opaque pagination cursor from a previous response. - `Statuses param.Field[[]string]` Query param: Filter by session status. Repeat the parameter to match any of multiple statuses. - `const BetaSessionListParamsStatusRescheduling BetaSessionListParamsStatus = "rescheduling"` - `const BetaSessionListParamsStatusRunning BetaSessionListParamsStatus = "running"` - `const BetaSessionListParamsStatusIdle BetaSessionListParamsStatus = "idle"` - `const BetaSessionListParamsStatusTerminated BetaSessionListParamsStatus = "terminated"` - `Betas param.Field[[]AnthropicBeta]` Header param: Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsSession struct{…}` A Managed Agents `session`. - `ID string` - `Agent BetaManagedAgentsSessionAgent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Multiagent BetaManagedAgentsSessionMultiagentCoordinator` Resolved coordinator topology with full agent definitions for each roster member. - `Agents []BetaManagedAgentsSessionThreadAgent` Full `agent` definitions the coordinator may spawn as session threads. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `Type BetaManagedAgentsSessionMultiagentCoordinatorType` - `const BetaManagedAgentsSessionMultiagentCoordinatorTypeCoordinator BetaManagedAgentsSessionMultiagentCoordinatorType = "coordinator"` - `Name string` - `Skills []BetaManagedAgentsSessionAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `System string` - `Tools []BetaManagedAgentsSessionAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `type BetaManagedAgentsMCPToolset struct{…}` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Type BetaManagedAgentsSessionAgentType` - `const BetaManagedAgentsSessionAgentTypeAgent BetaManagedAgentsSessionAgentType = "agent"` - `Version int64` - `ArchivedAt Time` A timestamp in RFC 3339 format - `CreatedAt Time` A timestamp in RFC 3339 format - `EnvironmentID string` - `Metadata map[string, string]` - `OutcomeEvaluations []BetaManagedAgentsOutcomeEvaluationResource` Per-outcome evaluation state. One entry per define_outcome event sent to the session. - `CompletedAt Time` A timestamp in RFC 3339 format - `Description string` What the agent should produce. - `Explanation string` Grader's verdict text from the most recent evaluation. For satisfied, explains why criteria are met; for needs_revision (intermediate), what's missing; for failed, why unrecoverable. - `Iteration int64` 0-indexed revision cycle the outcome is currently on. - `OutcomeID string` Server-generated outc_ ID for this outcome. - `Result string` Current evaluation state. `pending` before the agent begins work; `running` while producing or revising; `evaluating` while the grader scores; `satisfied`/`max_iterations_reached`/`failed`/`interrupted` are terminal. - `Type BetaManagedAgentsOutcomeEvaluationResourceType` - `const BetaManagedAgentsOutcomeEvaluationResourceTypeOutcomeEvaluation BetaManagedAgentsOutcomeEvaluationResourceType = "outcome_evaluation"` - `Resources []BetaManagedAgentsSessionResourceUnion` - `type BetaManagedAgentsGitHubRepositoryResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `MountPath string` - `Type BetaManagedAgentsGitHubRepositoryResourceType` - `const BetaManagedAgentsGitHubRepositoryResourceTypeGitHubRepository BetaManagedAgentsGitHubRepositoryResourceType = "github_repository"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `URL string` - `Checkout BetaManagedAgentsGitHubRepositoryResourceCheckoutUnion` - `type BetaManagedAgentsBranchCheckout struct{…}` - `Name string` Branch name to check out. - `Type BetaManagedAgentsBranchCheckoutType` - `const BetaManagedAgentsBranchCheckoutTypeBranch BetaManagedAgentsBranchCheckoutType = "branch"` - `type BetaManagedAgentsCommitCheckout struct{…}` - `Sha string` Full commit SHA to check out. - `Type BetaManagedAgentsCommitCheckoutType` - `const BetaManagedAgentsCommitCheckoutTypeCommit BetaManagedAgentsCommitCheckoutType = "commit"` - `type BetaManagedAgentsFileResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `FileID string` - `MountPath string` - `Type BetaManagedAgentsFileResourceType` - `const BetaManagedAgentsFileResourceTypeFile BetaManagedAgentsFileResourceType = "file"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsMemoryStoreResource struct{…}` A memory store attached to an agent session. - `MemoryStoreID string` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type BetaManagedAgentsMemoryStoreResourceType` - `const BetaManagedAgentsMemoryStoreResourceTypeMemoryStore BetaManagedAgentsMemoryStoreResourceType = "memory_store"` - `Access BetaManagedAgentsMemoryStoreResourceAccess` Access mode for an attached memory store. - `const BetaManagedAgentsMemoryStoreResourceAccessReadWrite BetaManagedAgentsMemoryStoreResourceAccess = "read_write"` - `const BetaManagedAgentsMemoryStoreResourceAccessReadOnly BetaManagedAgentsMemoryStoreResourceAccess = "read_only"` - `Description string` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Instructions string` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `MountPath string` Filesystem path where the store is mounted in the session container, e.g. /mnt/memory/user-preferences. Derived from the store's name. Output-only. - `Name string` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. - `Stats BetaManagedAgentsSessionStats` Timing statistics for a session. - `ActiveSeconds float64` Cumulative time in seconds the session spent in running status. Excludes idle time. - `DurationSeconds float64` Elapsed time since session creation in seconds. For terminated sessions, frozen at the final update. - `Status BetaManagedAgentsSessionStatus` SessionStatus enum - `const BetaManagedAgentsSessionStatusRescheduling BetaManagedAgentsSessionStatus = "rescheduling"` - `const BetaManagedAgentsSessionStatusRunning BetaManagedAgentsSessionStatus = "running"` - `const BetaManagedAgentsSessionStatusIdle BetaManagedAgentsSessionStatus = "idle"` - `const BetaManagedAgentsSessionStatusTerminated BetaManagedAgentsSessionStatus = "terminated"` - `Title string` - `Type BetaManagedAgentsSessionType` - `const BetaManagedAgentsSessionTypeSession BetaManagedAgentsSessionType = "session"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `Usage BetaManagedAgentsSessionUsage` Cumulative token usage for a session across all turns. - `CacheCreation BetaManagedAgentsCacheCreationUsage` Prompt-cache creation token usage broken down by cache lifetime. - `Ephemeral1hInputTokens int64` Tokens used to create 1-hour ephemeral cache entries. - `Ephemeral5mInputTokens int64` Tokens used to create 5-minute ephemeral cache entries. - `CacheReadInputTokens int64` Total tokens read from prompt cache. - `InputTokens int64` Total input tokens consumed across all turns. - `OutputTokens int64` Total output tokens generated across all turns. - `VaultIDs []string` Vault IDs attached to the session at creation. Empty when no vaults were supplied. - `DeploymentID string` Deployment ID when the session was created from a deployment reference. Null otherwise. ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) page, err := client.Beta.Sessions.List(context.TODO(), anthropic.BetaSessionListParams{ }) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", page) } ``` #### Response ```json { "data": [ { "id": "sesn_011CZkZAtmR3yMPDzynEDxu7", "agent": { "id": "agent_011CZkYpogX7uDKUyvBTophP", "description": "A general-purpose starter agent.", "mcp_servers": [ { "name": "example-mcp", "type": "url", "url": "https://example-server.modelcontextprotocol.io/sse" } ], "model": { "id": "claude-sonnet-4-6", "speed": "standard" }, "multiagent": { "agents": [ { "id": "agent_011CZkYqphY8vELVzwCUpqiQ", "description": "A focused research subagent.", "mcp_servers": [ { "name": "example-mcp", "type": "url", "url": "https://example-server.modelcontextprotocol.io/sse" } ], "model": { "id": "claude-sonnet-4-6", "speed": "standard" }, "name": "Researcher", "skills": [ { "skill_id": "xlsx", "type": "anthropic", "version": "1" } ], "system": "You are a research subagent that gathers and summarises sources for the coordinating agent.", "tools": [ { "configs": [ { "enabled": true, "name": "bash", "permission_policy": { "type": "always_allow" } } ], "default_config": { "enabled": true, "permission_policy": { "type": "always_ask" } }, "type": "agent_toolset_20260401" } ], "type": "agent", "version": 1 } ], "type": "coordinator" }, "name": "My First Agent", "skills": [ { "skill_id": "xlsx", "type": "anthropic", "version": "1" }, { "skill_id": "skill_011CZkZFNu9hAbo3jZPRgTlx", "type": "custom", "version": "2" } ], "system": "You are a general-purpose agent that can research, write code, run commands, and use connected tools to complete the user's task end to end.", "tools": [ { "configs": [ { "enabled": true, "name": "bash", "permission_policy": { "type": "always_allow" } } ], "default_config": { "enabled": true, "permission_policy": { "type": "always_ask" } }, "type": "agent_toolset_20260401" } ], "type": "agent", "version": 1 }, "archived_at": null, "created_at": "2026-03-15T10:00:00Z", "environment_id": "env_011CZkZ9X2dpNyB7HsEFoRfW", "metadata": {}, "outcome_evaluations": [ { "completed_at": "2026-03-15T10:02:31Z", "description": "Produce a 2-page summary as summary.md", "explanation": "All five sections present with inline citations.", "iteration": 0, "outcome_id": "outc_011CZkZRSw2kEfs6ncTVljxP", "result": "satisfied", "type": "outcome_evaluation" } ], "resources": [ { "id": "sesrsc_011CZkZBJq5dWxk9fVLNcPht", "created_at": "2026-03-15T10:00:00Z", "file_id": "file_011CNha8iCJcU1wXNR6q4V8w", "mount_path": "/uploads/receipt.pdf", "type": "file", "updated_at": "2026-03-15T10:00:00Z" }, { "id": "sesrsc_011CZkZCKr6eXyl0gWMOdQiu", "created_at": "2026-03-15T10:00:00Z", "mount_path": "/workspace/example-repo", "type": "github_repository", "updated_at": "2026-03-15T10:00:00Z", "url": "https://github.com/example-org/example-repo", "checkout": { "name": "main", "type": "branch" } } ], "stats": { "active_seconds": 0, "duration_seconds": 0 }, "status": "idle", "title": "Order #1234 inquiry", "type": "session", "updated_at": "2026-03-15T10:00:00Z", "usage": { "cache_creation": { "ephemeral_1h_input_tokens": 0, "ephemeral_5m_input_tokens": 0 }, "cache_read_input_tokens": 0, "input_tokens": 0, "output_tokens": 0 }, "vault_ids": [ "vlt_011CZkZDLs7fYzm1hXNPeRjv" ], "deployment_id": "deployment_id" } ], "next_page": "page_MjAyNS0wNS0xNFQwMDowMDowMFo=" } ``` ## Get Session `client.Beta.Sessions.Get(ctx, sessionID, query) (*BetaManagedAgentsSession, error)` **get** `/v1/sessions/{session_id}` Get Session ### Parameters - `sessionID string` - `query BetaSessionGetParams` - `Betas param.Field[[]AnthropicBeta]` Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsSession struct{…}` A Managed Agents `session`. - `ID string` - `Agent BetaManagedAgentsSessionAgent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Multiagent BetaManagedAgentsSessionMultiagentCoordinator` Resolved coordinator topology with full agent definitions for each roster member. - `Agents []BetaManagedAgentsSessionThreadAgent` Full `agent` definitions the coordinator may spawn as session threads. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `Type BetaManagedAgentsSessionMultiagentCoordinatorType` - `const BetaManagedAgentsSessionMultiagentCoordinatorTypeCoordinator BetaManagedAgentsSessionMultiagentCoordinatorType = "coordinator"` - `Name string` - `Skills []BetaManagedAgentsSessionAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `System string` - `Tools []BetaManagedAgentsSessionAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `type BetaManagedAgentsMCPToolset struct{…}` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Type BetaManagedAgentsSessionAgentType` - `const BetaManagedAgentsSessionAgentTypeAgent BetaManagedAgentsSessionAgentType = "agent"` - `Version int64` - `ArchivedAt Time` A timestamp in RFC 3339 format - `CreatedAt Time` A timestamp in RFC 3339 format - `EnvironmentID string` - `Metadata map[string, string]` - `OutcomeEvaluations []BetaManagedAgentsOutcomeEvaluationResource` Per-outcome evaluation state. One entry per define_outcome event sent to the session. - `CompletedAt Time` A timestamp in RFC 3339 format - `Description string` What the agent should produce. - `Explanation string` Grader's verdict text from the most recent evaluation. For satisfied, explains why criteria are met; for needs_revision (intermediate), what's missing; for failed, why unrecoverable. - `Iteration int64` 0-indexed revision cycle the outcome is currently on. - `OutcomeID string` Server-generated outc_ ID for this outcome. - `Result string` Current evaluation state. `pending` before the agent begins work; `running` while producing or revising; `evaluating` while the grader scores; `satisfied`/`max_iterations_reached`/`failed`/`interrupted` are terminal. - `Type BetaManagedAgentsOutcomeEvaluationResourceType` - `const BetaManagedAgentsOutcomeEvaluationResourceTypeOutcomeEvaluation BetaManagedAgentsOutcomeEvaluationResourceType = "outcome_evaluation"` - `Resources []BetaManagedAgentsSessionResourceUnion` - `type BetaManagedAgentsGitHubRepositoryResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `MountPath string` - `Type BetaManagedAgentsGitHubRepositoryResourceType` - `const BetaManagedAgentsGitHubRepositoryResourceTypeGitHubRepository BetaManagedAgentsGitHubRepositoryResourceType = "github_repository"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `URL string` - `Checkout BetaManagedAgentsGitHubRepositoryResourceCheckoutUnion` - `type BetaManagedAgentsBranchCheckout struct{…}` - `Name string` Branch name to check out. - `Type BetaManagedAgentsBranchCheckoutType` - `const BetaManagedAgentsBranchCheckoutTypeBranch BetaManagedAgentsBranchCheckoutType = "branch"` - `type BetaManagedAgentsCommitCheckout struct{…}` - `Sha string` Full commit SHA to check out. - `Type BetaManagedAgentsCommitCheckoutType` - `const BetaManagedAgentsCommitCheckoutTypeCommit BetaManagedAgentsCommitCheckoutType = "commit"` - `type BetaManagedAgentsFileResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `FileID string` - `MountPath string` - `Type BetaManagedAgentsFileResourceType` - `const BetaManagedAgentsFileResourceTypeFile BetaManagedAgentsFileResourceType = "file"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsMemoryStoreResource struct{…}` A memory store attached to an agent session. - `MemoryStoreID string` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type BetaManagedAgentsMemoryStoreResourceType` - `const BetaManagedAgentsMemoryStoreResourceTypeMemoryStore BetaManagedAgentsMemoryStoreResourceType = "memory_store"` - `Access BetaManagedAgentsMemoryStoreResourceAccess` Access mode for an attached memory store. - `const BetaManagedAgentsMemoryStoreResourceAccessReadWrite BetaManagedAgentsMemoryStoreResourceAccess = "read_write"` - `const BetaManagedAgentsMemoryStoreResourceAccessReadOnly BetaManagedAgentsMemoryStoreResourceAccess = "read_only"` - `Description string` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Instructions string` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `MountPath string` Filesystem path where the store is mounted in the session container, e.g. /mnt/memory/user-preferences. Derived from the store's name. Output-only. - `Name string` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. - `Stats BetaManagedAgentsSessionStats` Timing statistics for a session. - `ActiveSeconds float64` Cumulative time in seconds the session spent in running status. Excludes idle time. - `DurationSeconds float64` Elapsed time since session creation in seconds. For terminated sessions, frozen at the final update. - `Status BetaManagedAgentsSessionStatus` SessionStatus enum - `const BetaManagedAgentsSessionStatusRescheduling BetaManagedAgentsSessionStatus = "rescheduling"` - `const BetaManagedAgentsSessionStatusRunning BetaManagedAgentsSessionStatus = "running"` - `const BetaManagedAgentsSessionStatusIdle BetaManagedAgentsSessionStatus = "idle"` - `const BetaManagedAgentsSessionStatusTerminated BetaManagedAgentsSessionStatus = "terminated"` - `Title string` - `Type BetaManagedAgentsSessionType` - `const BetaManagedAgentsSessionTypeSession BetaManagedAgentsSessionType = "session"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `Usage BetaManagedAgentsSessionUsage` Cumulative token usage for a session across all turns. - `CacheCreation BetaManagedAgentsCacheCreationUsage` Prompt-cache creation token usage broken down by cache lifetime. - `Ephemeral1hInputTokens int64` Tokens used to create 1-hour ephemeral cache entries. - `Ephemeral5mInputTokens int64` Tokens used to create 5-minute ephemeral cache entries. - `CacheReadInputTokens int64` Total tokens read from prompt cache. - `InputTokens int64` Total input tokens consumed across all turns. - `OutputTokens int64` Total output tokens generated across all turns. - `VaultIDs []string` Vault IDs attached to the session at creation. Empty when no vaults were supplied. - `DeploymentID string` Deployment ID when the session was created from a deployment reference. Null otherwise. ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) betaManagedAgentsSession, err := client.Beta.Sessions.Get( context.TODO(), "sesn_011CZkZAtmR3yMPDzynEDxu7", anthropic.BetaSessionGetParams{ }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", betaManagedAgentsSession.ID) } ``` #### Response ```json { "id": "sesn_011CZkZAtmR3yMPDzynEDxu7", "agent": { "id": "agent_011CZkYpogX7uDKUyvBTophP", "description": "A general-purpose starter agent.", "mcp_servers": [ { "name": "example-mcp", "type": "url", "url": "https://example-server.modelcontextprotocol.io/sse" } ], "model": { "id": "claude-sonnet-4-6", "speed": "standard" }, "multiagent": { "agents": [ { "id": "agent_011CZkYqphY8vELVzwCUpqiQ", "description": "A focused research subagent.", "mcp_servers": [ { "name": "example-mcp", "type": "url", "url": "https://example-server.modelcontextprotocol.io/sse" } ], "model": { "id": "claude-sonnet-4-6", "speed": "standard" }, "name": "Researcher", "skills": [ { "skill_id": "xlsx", "type": "anthropic", "version": "1" } ], "system": "You are a research subagent that gathers and summarises sources for the coordinating agent.", "tools": [ { "configs": [ { "enabled": true, "name": "bash", "permission_policy": { "type": "always_allow" } } ], "default_config": { "enabled": true, "permission_policy": { "type": "always_ask" } }, "type": "agent_toolset_20260401" } ], "type": "agent", "version": 1 } ], "type": "coordinator" }, "name": "My First Agent", "skills": [ { "skill_id": "xlsx", "type": "anthropic", "version": "1" }, { "skill_id": "skill_011CZkZFNu9hAbo3jZPRgTlx", "type": "custom", "version": "2" } ], "system": "You are a general-purpose agent that can research, write code, run commands, and use connected tools to complete the user's task end to end.", "tools": [ { "configs": [ { "enabled": true, "name": "bash", "permission_policy": { "type": "always_allow" } } ], "default_config": { "enabled": true, "permission_policy": { "type": "always_ask" } }, "type": "agent_toolset_20260401" } ], "type": "agent", "version": 1 }, "archived_at": null, "created_at": "2026-03-15T10:00:00Z", "environment_id": "env_011CZkZ9X2dpNyB7HsEFoRfW", "metadata": {}, "outcome_evaluations": [ { "completed_at": "2026-03-15T10:02:31Z", "description": "Produce a 2-page summary as summary.md", "explanation": "All five sections present with inline citations.", "iteration": 0, "outcome_id": "outc_011CZkZRSw2kEfs6ncTVljxP", "result": "satisfied", "type": "outcome_evaluation" } ], "resources": [ { "id": "sesrsc_011CZkZBJq5dWxk9fVLNcPht", "created_at": "2026-03-15T10:00:00Z", "file_id": "file_011CNha8iCJcU1wXNR6q4V8w", "mount_path": "/uploads/receipt.pdf", "type": "file", "updated_at": "2026-03-15T10:00:00Z" }, { "id": "sesrsc_011CZkZCKr6eXyl0gWMOdQiu", "created_at": "2026-03-15T10:00:00Z", "mount_path": "/workspace/example-repo", "type": "github_repository", "updated_at": "2026-03-15T10:00:00Z", "url": "https://github.com/example-org/example-repo", "checkout": { "name": "main", "type": "branch" } } ], "stats": { "active_seconds": 0, "duration_seconds": 0 }, "status": "idle", "title": "Order #1234 inquiry", "type": "session", "updated_at": "2026-03-15T10:00:00Z", "usage": { "cache_creation": { "ephemeral_1h_input_tokens": 0, "ephemeral_5m_input_tokens": 0 }, "cache_read_input_tokens": 0, "input_tokens": 0, "output_tokens": 0 }, "vault_ids": [ "vlt_011CZkZDLs7fYzm1hXNPeRjv" ], "deployment_id": "deployment_id" } ``` ## Update Session `client.Beta.Sessions.Update(ctx, sessionID, params) (*BetaManagedAgentsSession, error)` **post** `/v1/sessions/{session_id}` Update Session ### Parameters - `sessionID string` - `params BetaSessionUpdateParams` - `Agent param.Field[BetaManagedAgentsSessionAgentUpdate]` Body param: Mid-session agent configuration update. Only `tools` and `mcp_servers` are updatable. Full replacement: the provided array becomes the new value. To preserve existing entries, GET the session, modify the array, and POST it back. - `Metadata param.Field[map[string, string]]` Body param: Metadata patch. Set a key to a string to upsert it, or to null to delete it. Omit the field to preserve. - `Title param.Field[string]` Body param: Human-readable session title. - `VaultIDs param.Field[[]string]` Body param: Vault IDs (`vlt_*`) to attach to the session. Not yet supported; requests setting this field are rejected. Reserved for future use. - `Betas param.Field[[]AnthropicBeta]` Header param: Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsSession struct{…}` A Managed Agents `session`. - `ID string` - `Agent BetaManagedAgentsSessionAgent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Multiagent BetaManagedAgentsSessionMultiagentCoordinator` Resolved coordinator topology with full agent definitions for each roster member. - `Agents []BetaManagedAgentsSessionThreadAgent` Full `agent` definitions the coordinator may spawn as session threads. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `Type BetaManagedAgentsSessionMultiagentCoordinatorType` - `const BetaManagedAgentsSessionMultiagentCoordinatorTypeCoordinator BetaManagedAgentsSessionMultiagentCoordinatorType = "coordinator"` - `Name string` - `Skills []BetaManagedAgentsSessionAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `System string` - `Tools []BetaManagedAgentsSessionAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `type BetaManagedAgentsMCPToolset struct{…}` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Type BetaManagedAgentsSessionAgentType` - `const BetaManagedAgentsSessionAgentTypeAgent BetaManagedAgentsSessionAgentType = "agent"` - `Version int64` - `ArchivedAt Time` A timestamp in RFC 3339 format - `CreatedAt Time` A timestamp in RFC 3339 format - `EnvironmentID string` - `Metadata map[string, string]` - `OutcomeEvaluations []BetaManagedAgentsOutcomeEvaluationResource` Per-outcome evaluation state. One entry per define_outcome event sent to the session. - `CompletedAt Time` A timestamp in RFC 3339 format - `Description string` What the agent should produce. - `Explanation string` Grader's verdict text from the most recent evaluation. For satisfied, explains why criteria are met; for needs_revision (intermediate), what's missing; for failed, why unrecoverable. - `Iteration int64` 0-indexed revision cycle the outcome is currently on. - `OutcomeID string` Server-generated outc_ ID for this outcome. - `Result string` Current evaluation state. `pending` before the agent begins work; `running` while producing or revising; `evaluating` while the grader scores; `satisfied`/`max_iterations_reached`/`failed`/`interrupted` are terminal. - `Type BetaManagedAgentsOutcomeEvaluationResourceType` - `const BetaManagedAgentsOutcomeEvaluationResourceTypeOutcomeEvaluation BetaManagedAgentsOutcomeEvaluationResourceType = "outcome_evaluation"` - `Resources []BetaManagedAgentsSessionResourceUnion` - `type BetaManagedAgentsGitHubRepositoryResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `MountPath string` - `Type BetaManagedAgentsGitHubRepositoryResourceType` - `const BetaManagedAgentsGitHubRepositoryResourceTypeGitHubRepository BetaManagedAgentsGitHubRepositoryResourceType = "github_repository"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `URL string` - `Checkout BetaManagedAgentsGitHubRepositoryResourceCheckoutUnion` - `type BetaManagedAgentsBranchCheckout struct{…}` - `Name string` Branch name to check out. - `Type BetaManagedAgentsBranchCheckoutType` - `const BetaManagedAgentsBranchCheckoutTypeBranch BetaManagedAgentsBranchCheckoutType = "branch"` - `type BetaManagedAgentsCommitCheckout struct{…}` - `Sha string` Full commit SHA to check out. - `Type BetaManagedAgentsCommitCheckoutType` - `const BetaManagedAgentsCommitCheckoutTypeCommit BetaManagedAgentsCommitCheckoutType = "commit"` - `type BetaManagedAgentsFileResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `FileID string` - `MountPath string` - `Type BetaManagedAgentsFileResourceType` - `const BetaManagedAgentsFileResourceTypeFile BetaManagedAgentsFileResourceType = "file"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsMemoryStoreResource struct{…}` A memory store attached to an agent session. - `MemoryStoreID string` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type BetaManagedAgentsMemoryStoreResourceType` - `const BetaManagedAgentsMemoryStoreResourceTypeMemoryStore BetaManagedAgentsMemoryStoreResourceType = "memory_store"` - `Access BetaManagedAgentsMemoryStoreResourceAccess` Access mode for an attached memory store. - `const BetaManagedAgentsMemoryStoreResourceAccessReadWrite BetaManagedAgentsMemoryStoreResourceAccess = "read_write"` - `const BetaManagedAgentsMemoryStoreResourceAccessReadOnly BetaManagedAgentsMemoryStoreResourceAccess = "read_only"` - `Description string` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Instructions string` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `MountPath string` Filesystem path where the store is mounted in the session container, e.g. /mnt/memory/user-preferences. Derived from the store's name. Output-only. - `Name string` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. - `Stats BetaManagedAgentsSessionStats` Timing statistics for a session. - `ActiveSeconds float64` Cumulative time in seconds the session spent in running status. Excludes idle time. - `DurationSeconds float64` Elapsed time since session creation in seconds. For terminated sessions, frozen at the final update. - `Status BetaManagedAgentsSessionStatus` SessionStatus enum - `const BetaManagedAgentsSessionStatusRescheduling BetaManagedAgentsSessionStatus = "rescheduling"` - `const BetaManagedAgentsSessionStatusRunning BetaManagedAgentsSessionStatus = "running"` - `const BetaManagedAgentsSessionStatusIdle BetaManagedAgentsSessionStatus = "idle"` - `const BetaManagedAgentsSessionStatusTerminated BetaManagedAgentsSessionStatus = "terminated"` - `Title string` - `Type BetaManagedAgentsSessionType` - `const BetaManagedAgentsSessionTypeSession BetaManagedAgentsSessionType = "session"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `Usage BetaManagedAgentsSessionUsage` Cumulative token usage for a session across all turns. - `CacheCreation BetaManagedAgentsCacheCreationUsage` Prompt-cache creation token usage broken down by cache lifetime. - `Ephemeral1hInputTokens int64` Tokens used to create 1-hour ephemeral cache entries. - `Ephemeral5mInputTokens int64` Tokens used to create 5-minute ephemeral cache entries. - `CacheReadInputTokens int64` Total tokens read from prompt cache. - `InputTokens int64` Total input tokens consumed across all turns. - `OutputTokens int64` Total output tokens generated across all turns. - `VaultIDs []string` Vault IDs attached to the session at creation. Empty when no vaults were supplied. - `DeploymentID string` Deployment ID when the session was created from a deployment reference. Null otherwise. ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) betaManagedAgentsSession, err := client.Beta.Sessions.Update( context.TODO(), "sesn_011CZkZAtmR3yMPDzynEDxu7", anthropic.BetaSessionUpdateParams{ }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", betaManagedAgentsSession.ID) } ``` #### Response ```json { "id": "sesn_011CZkZAtmR3yMPDzynEDxu7", "agent": { "id": "agent_011CZkYpogX7uDKUyvBTophP", "description": "A general-purpose starter agent.", "mcp_servers": [ { "name": "example-mcp", "type": "url", "url": "https://example-server.modelcontextprotocol.io/sse" } ], "model": { "id": "claude-sonnet-4-6", "speed": "standard" }, "multiagent": { "agents": [ { "id": "agent_011CZkYqphY8vELVzwCUpqiQ", "description": "A focused research subagent.", "mcp_servers": [ { "name": "example-mcp", "type": "url", "url": "https://example-server.modelcontextprotocol.io/sse" } ], "model": { "id": "claude-sonnet-4-6", "speed": "standard" }, "name": "Researcher", "skills": [ { "skill_id": "xlsx", "type": "anthropic", "version": "1" } ], "system": "You are a research subagent that gathers and summarises sources for the coordinating agent.", "tools": [ { "configs": [ { "enabled": true, "name": "bash", "permission_policy": { "type": "always_allow" } } ], "default_config": { "enabled": true, "permission_policy": { "type": "always_ask" } }, "type": "agent_toolset_20260401" } ], "type": "agent", "version": 1 } ], "type": "coordinator" }, "name": "My First Agent", "skills": [ { "skill_id": "xlsx", "type": "anthropic", "version": "1" }, { "skill_id": "skill_011CZkZFNu9hAbo3jZPRgTlx", "type": "custom", "version": "2" } ], "system": "You are a general-purpose agent that can research, write code, run commands, and use connected tools to complete the user's task end to end.", "tools": [ { "configs": [ { "enabled": true, "name": "bash", "permission_policy": { "type": "always_allow" } } ], "default_config": { "enabled": true, "permission_policy": { "type": "always_ask" } }, "type": "agent_toolset_20260401" } ], "type": "agent", "version": 1 }, "archived_at": null, "created_at": "2026-03-15T10:00:00Z", "environment_id": "env_011CZkZ9X2dpNyB7HsEFoRfW", "metadata": {}, "outcome_evaluations": [ { "completed_at": "2026-03-15T10:02:31Z", "description": "Produce a 2-page summary as summary.md", "explanation": "All five sections present with inline citations.", "iteration": 0, "outcome_id": "outc_011CZkZRSw2kEfs6ncTVljxP", "result": "satisfied", "type": "outcome_evaluation" } ], "resources": [ { "id": "sesrsc_011CZkZBJq5dWxk9fVLNcPht", "created_at": "2026-03-15T10:00:00Z", "file_id": "file_011CNha8iCJcU1wXNR6q4V8w", "mount_path": "/uploads/receipt.pdf", "type": "file", "updated_at": "2026-03-15T10:00:00Z" }, { "id": "sesrsc_011CZkZCKr6eXyl0gWMOdQiu", "created_at": "2026-03-15T10:00:00Z", "mount_path": "/workspace/example-repo", "type": "github_repository", "updated_at": "2026-03-15T10:00:00Z", "url": "https://github.com/example-org/example-repo", "checkout": { "name": "main", "type": "branch" } } ], "stats": { "active_seconds": 0, "duration_seconds": 0 }, "status": "idle", "title": "Order #1234 inquiry", "type": "session", "updated_at": "2026-03-15T10:00:00Z", "usage": { "cache_creation": { "ephemeral_1h_input_tokens": 0, "ephemeral_5m_input_tokens": 0 }, "cache_read_input_tokens": 0, "input_tokens": 0, "output_tokens": 0 }, "vault_ids": [ "vlt_011CZkZDLs7fYzm1hXNPeRjv" ], "deployment_id": "deployment_id" } ``` ## Delete Session `client.Beta.Sessions.Delete(ctx, sessionID, body) (*BetaManagedAgentsDeletedSession, error)` **delete** `/v1/sessions/{session_id}` Delete Session ### Parameters - `sessionID string` - `body BetaSessionDeleteParams` - `Betas param.Field[[]AnthropicBeta]` Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsDeletedSession struct{…}` Confirmation that a `session` has been permanently deleted. - `ID string` - `Type BetaManagedAgentsDeletedSessionType` - `const BetaManagedAgentsDeletedSessionTypeSessionDeleted BetaManagedAgentsDeletedSessionType = "session_deleted"` ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) betaManagedAgentsDeletedSession, err := client.Beta.Sessions.Delete( context.TODO(), "sesn_011CZkZAtmR3yMPDzynEDxu7", anthropic.BetaSessionDeleteParams{ }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", betaManagedAgentsDeletedSession.ID) } ``` #### Response ```json { "id": "sesn_011CZkZAtmR3yMPDzynEDxu7", "type": "session_deleted" } ``` ## Archive Session `client.Beta.Sessions.Archive(ctx, sessionID, body) (*BetaManagedAgentsSession, error)` **post** `/v1/sessions/{session_id}/archive` Archive Session ### Parameters - `sessionID string` - `body BetaSessionArchiveParams` - `Betas param.Field[[]AnthropicBeta]` Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsSession struct{…}` A Managed Agents `session`. - `ID string` - `Agent BetaManagedAgentsSessionAgent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Multiagent BetaManagedAgentsSessionMultiagentCoordinator` Resolved coordinator topology with full agent definitions for each roster member. - `Agents []BetaManagedAgentsSessionThreadAgent` Full `agent` definitions the coordinator may spawn as session threads. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `Type BetaManagedAgentsSessionMultiagentCoordinatorType` - `const BetaManagedAgentsSessionMultiagentCoordinatorTypeCoordinator BetaManagedAgentsSessionMultiagentCoordinatorType = "coordinator"` - `Name string` - `Skills []BetaManagedAgentsSessionAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `System string` - `Tools []BetaManagedAgentsSessionAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `type BetaManagedAgentsMCPToolset struct{…}` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Type BetaManagedAgentsSessionAgentType` - `const BetaManagedAgentsSessionAgentTypeAgent BetaManagedAgentsSessionAgentType = "agent"` - `Version int64` - `ArchivedAt Time` A timestamp in RFC 3339 format - `CreatedAt Time` A timestamp in RFC 3339 format - `EnvironmentID string` - `Metadata map[string, string]` - `OutcomeEvaluations []BetaManagedAgentsOutcomeEvaluationResource` Per-outcome evaluation state. One entry per define_outcome event sent to the session. - `CompletedAt Time` A timestamp in RFC 3339 format - `Description string` What the agent should produce. - `Explanation string` Grader's verdict text from the most recent evaluation. For satisfied, explains why criteria are met; for needs_revision (intermediate), what's missing; for failed, why unrecoverable. - `Iteration int64` 0-indexed revision cycle the outcome is currently on. - `OutcomeID string` Server-generated outc_ ID for this outcome. - `Result string` Current evaluation state. `pending` before the agent begins work; `running` while producing or revising; `evaluating` while the grader scores; `satisfied`/`max_iterations_reached`/`failed`/`interrupted` are terminal. - `Type BetaManagedAgentsOutcomeEvaluationResourceType` - `const BetaManagedAgentsOutcomeEvaluationResourceTypeOutcomeEvaluation BetaManagedAgentsOutcomeEvaluationResourceType = "outcome_evaluation"` - `Resources []BetaManagedAgentsSessionResourceUnion` - `type BetaManagedAgentsGitHubRepositoryResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `MountPath string` - `Type BetaManagedAgentsGitHubRepositoryResourceType` - `const BetaManagedAgentsGitHubRepositoryResourceTypeGitHubRepository BetaManagedAgentsGitHubRepositoryResourceType = "github_repository"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `URL string` - `Checkout BetaManagedAgentsGitHubRepositoryResourceCheckoutUnion` - `type BetaManagedAgentsBranchCheckout struct{…}` - `Name string` Branch name to check out. - `Type BetaManagedAgentsBranchCheckoutType` - `const BetaManagedAgentsBranchCheckoutTypeBranch BetaManagedAgentsBranchCheckoutType = "branch"` - `type BetaManagedAgentsCommitCheckout struct{…}` - `Sha string` Full commit SHA to check out. - `Type BetaManagedAgentsCommitCheckoutType` - `const BetaManagedAgentsCommitCheckoutTypeCommit BetaManagedAgentsCommitCheckoutType = "commit"` - `type BetaManagedAgentsFileResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `FileID string` - `MountPath string` - `Type BetaManagedAgentsFileResourceType` - `const BetaManagedAgentsFileResourceTypeFile BetaManagedAgentsFileResourceType = "file"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsMemoryStoreResource struct{…}` A memory store attached to an agent session. - `MemoryStoreID string` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type BetaManagedAgentsMemoryStoreResourceType` - `const BetaManagedAgentsMemoryStoreResourceTypeMemoryStore BetaManagedAgentsMemoryStoreResourceType = "memory_store"` - `Access BetaManagedAgentsMemoryStoreResourceAccess` Access mode for an attached memory store. - `const BetaManagedAgentsMemoryStoreResourceAccessReadWrite BetaManagedAgentsMemoryStoreResourceAccess = "read_write"` - `const BetaManagedAgentsMemoryStoreResourceAccessReadOnly BetaManagedAgentsMemoryStoreResourceAccess = "read_only"` - `Description string` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Instructions string` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `MountPath string` Filesystem path where the store is mounted in the session container, e.g. /mnt/memory/user-preferences. Derived from the store's name. Output-only. - `Name string` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. - `Stats BetaManagedAgentsSessionStats` Timing statistics for a session. - `ActiveSeconds float64` Cumulative time in seconds the session spent in running status. Excludes idle time. - `DurationSeconds float64` Elapsed time since session creation in seconds. For terminated sessions, frozen at the final update. - `Status BetaManagedAgentsSessionStatus` SessionStatus enum - `const BetaManagedAgentsSessionStatusRescheduling BetaManagedAgentsSessionStatus = "rescheduling"` - `const BetaManagedAgentsSessionStatusRunning BetaManagedAgentsSessionStatus = "running"` - `const BetaManagedAgentsSessionStatusIdle BetaManagedAgentsSessionStatus = "idle"` - `const BetaManagedAgentsSessionStatusTerminated BetaManagedAgentsSessionStatus = "terminated"` - `Title string` - `Type BetaManagedAgentsSessionType` - `const BetaManagedAgentsSessionTypeSession BetaManagedAgentsSessionType = "session"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `Usage BetaManagedAgentsSessionUsage` Cumulative token usage for a session across all turns. - `CacheCreation BetaManagedAgentsCacheCreationUsage` Prompt-cache creation token usage broken down by cache lifetime. - `Ephemeral1hInputTokens int64` Tokens used to create 1-hour ephemeral cache entries. - `Ephemeral5mInputTokens int64` Tokens used to create 5-minute ephemeral cache entries. - `CacheReadInputTokens int64` Total tokens read from prompt cache. - `InputTokens int64` Total input tokens consumed across all turns. - `OutputTokens int64` Total output tokens generated across all turns. - `VaultIDs []string` Vault IDs attached to the session at creation. Empty when no vaults were supplied. - `DeploymentID string` Deployment ID when the session was created from a deployment reference. Null otherwise. ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) betaManagedAgentsSession, err := client.Beta.Sessions.Archive( context.TODO(), "sesn_011CZkZAtmR3yMPDzynEDxu7", anthropic.BetaSessionArchiveParams{ }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", betaManagedAgentsSession.ID) } ``` #### Response ```json { "id": "sesn_011CZkZAtmR3yMPDzynEDxu7", "agent": { "id": "agent_011CZkYpogX7uDKUyvBTophP", "description": "A general-purpose starter agent.", "mcp_servers": [ { "name": "example-mcp", "type": "url", "url": "https://example-server.modelcontextprotocol.io/sse" } ], "model": { "id": "claude-sonnet-4-6", "speed": "standard" }, "multiagent": { "agents": [ { "id": "agent_011CZkYqphY8vELVzwCUpqiQ", "description": "A focused research subagent.", "mcp_servers": [ { "name": "example-mcp", "type": "url", "url": "https://example-server.modelcontextprotocol.io/sse" } ], "model": { "id": "claude-sonnet-4-6", "speed": "standard" }, "name": "Researcher", "skills": [ { "skill_id": "xlsx", "type": "anthropic", "version": "1" } ], "system": "You are a research subagent that gathers and summarises sources for the coordinating agent.", "tools": [ { "configs": [ { "enabled": true, "name": "bash", "permission_policy": { "type": "always_allow" } } ], "default_config": { "enabled": true, "permission_policy": { "type": "always_ask" } }, "type": "agent_toolset_20260401" } ], "type": "agent", "version": 1 } ], "type": "coordinator" }, "name": "My First Agent", "skills": [ { "skill_id": "xlsx", "type": "anthropic", "version": "1" }, { "skill_id": "skill_011CZkZFNu9hAbo3jZPRgTlx", "type": "custom", "version": "2" } ], "system": "You are a general-purpose agent that can research, write code, run commands, and use connected tools to complete the user's task end to end.", "tools": [ { "configs": [ { "enabled": true, "name": "bash", "permission_policy": { "type": "always_allow" } } ], "default_config": { "enabled": true, "permission_policy": { "type": "always_ask" } }, "type": "agent_toolset_20260401" } ], "type": "agent", "version": 1 }, "archived_at": null, "created_at": "2026-03-15T10:00:00Z", "environment_id": "env_011CZkZ9X2dpNyB7HsEFoRfW", "metadata": {}, "outcome_evaluations": [ { "completed_at": "2026-03-15T10:02:31Z", "description": "Produce a 2-page summary as summary.md", "explanation": "All five sections present with inline citations.", "iteration": 0, "outcome_id": "outc_011CZkZRSw2kEfs6ncTVljxP", "result": "satisfied", "type": "outcome_evaluation" } ], "resources": [ { "id": "sesrsc_011CZkZBJq5dWxk9fVLNcPht", "created_at": "2026-03-15T10:00:00Z", "file_id": "file_011CNha8iCJcU1wXNR6q4V8w", "mount_path": "/uploads/receipt.pdf", "type": "file", "updated_at": "2026-03-15T10:00:00Z" }, { "id": "sesrsc_011CZkZCKr6eXyl0gWMOdQiu", "created_at": "2026-03-15T10:00:00Z", "mount_path": "/workspace/example-repo", "type": "github_repository", "updated_at": "2026-03-15T10:00:00Z", "url": "https://github.com/example-org/example-repo", "checkout": { "name": "main", "type": "branch" } } ], "stats": { "active_seconds": 0, "duration_seconds": 0 }, "status": "idle", "title": "Order #1234 inquiry", "type": "session", "updated_at": "2026-03-15T10:00:00Z", "usage": { "cache_creation": { "ephemeral_1h_input_tokens": 0, "ephemeral_5m_input_tokens": 0 }, "cache_read_input_tokens": 0, "input_tokens": 0, "output_tokens": 0 }, "vault_ids": [ "vlt_011CZkZDLs7fYzm1hXNPeRjv" ], "deployment_id": "deployment_id" } ``` ## Domain Types ### Beta Managed Agents Agent Params - `type BetaManagedAgentsAgentParamsResp struct{…}` Specification for an Agent. Provide a specific `version` or use the short-form `agent="agent_id"` for the most recent version - `ID string` The `agent` ID. - `Type BetaManagedAgentsAgentParamsType` - `const BetaManagedAgentsAgentParamsTypeAgent BetaManagedAgentsAgentParamsType = "agent"` - `Version int64` The specific `agent` version to use. Omit to use the latest version. Must be at least 1 if specified. ### Beta Managed Agents Branch Checkout - `type BetaManagedAgentsBranchCheckout struct{…}` - `Name string` Branch name to check out. - `Type BetaManagedAgentsBranchCheckoutType` - `const BetaManagedAgentsBranchCheckoutTypeBranch BetaManagedAgentsBranchCheckoutType = "branch"` ### Beta Managed Agents Cache Creation Usage - `type BetaManagedAgentsCacheCreationUsage struct{…}` Prompt-cache creation token usage broken down by cache lifetime. - `Ephemeral1hInputTokens int64` Tokens used to create 1-hour ephemeral cache entries. - `Ephemeral5mInputTokens int64` Tokens used to create 5-minute ephemeral cache entries. ### Beta Managed Agents Commit Checkout - `type BetaManagedAgentsCommitCheckout struct{…}` - `Sha string` Full commit SHA to check out. - `Type BetaManagedAgentsCommitCheckoutType` - `const BetaManagedAgentsCommitCheckoutTypeCommit BetaManagedAgentsCommitCheckoutType = "commit"` ### Beta Managed Agents Deleted Session - `type BetaManagedAgentsDeletedSession struct{…}` Confirmation that a `session` has been permanently deleted. - `ID string` - `Type BetaManagedAgentsDeletedSessionType` - `const BetaManagedAgentsDeletedSessionTypeSessionDeleted BetaManagedAgentsDeletedSessionType = "session_deleted"` ### Beta Managed Agents File Resource Params - `type BetaManagedAgentsFileResourceParamsResp struct{…}` Mount a file uploaded via the Files API into the session. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileResourceParamsType` - `const BetaManagedAgentsFileResourceParamsTypeFile BetaManagedAgentsFileResourceParamsType = "file"` - `MountPath string` Mount path in the container. Defaults to `/mnt/session/uploads/`. ### Beta Managed Agents GitHub Repository Resource Params - `type BetaManagedAgentsGitHubRepositoryResourceParamsResp struct{…}` Mount a GitHub repository into the session's container. - `AuthorizationToken string` GitHub authorization token used to clone the repository. - `Type BetaManagedAgentsGitHubRepositoryResourceParamsType` - `const BetaManagedAgentsGitHubRepositoryResourceParamsTypeGitHubRepository BetaManagedAgentsGitHubRepositoryResourceParamsType = "github_repository"` - `URL string` Github URL of the repository - `Checkout BetaManagedAgentsGitHubRepositoryResourceParamsCheckoutUnionResp` Branch or commit to check out. Defaults to the repository's default branch. - `type BetaManagedAgentsBranchCheckout struct{…}` - `Name string` Branch name to check out. - `Type BetaManagedAgentsBranchCheckoutType` - `const BetaManagedAgentsBranchCheckoutTypeBranch BetaManagedAgentsBranchCheckoutType = "branch"` - `type BetaManagedAgentsCommitCheckout struct{…}` - `Sha string` Full commit SHA to check out. - `Type BetaManagedAgentsCommitCheckoutType` - `const BetaManagedAgentsCommitCheckoutTypeCommit BetaManagedAgentsCommitCheckoutType = "commit"` - `MountPath string` Mount path in the container. Defaults to `/workspace/`. ### Beta Managed Agents Memory Store Resource Param - `type BetaManagedAgentsMemoryStoreResourceParamResp struct{…}` Parameters for attaching a memory store to an agent session. - `MemoryStoreID string` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type BetaManagedAgentsMemoryStoreResourceParamType` - `const BetaManagedAgentsMemoryStoreResourceParamTypeMemoryStore BetaManagedAgentsMemoryStoreResourceParamType = "memory_store"` - `Access BetaManagedAgentsMemoryStoreResourceParamAccess` Access mode for an attached memory store. - `const BetaManagedAgentsMemoryStoreResourceParamAccessReadWrite BetaManagedAgentsMemoryStoreResourceParamAccess = "read_write"` - `const BetaManagedAgentsMemoryStoreResourceParamAccessReadOnly BetaManagedAgentsMemoryStoreResourceParamAccess = "read_only"` - `Instructions string` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. ### Beta Managed Agents Multiagent - `type BetaManagedAgentsMultiagent struct{…}` Resolved coordinator topology with a concrete agent roster. - `Agents []BetaManagedAgentsAgentReference` Agents the coordinator may spawn as session threads, each resolved to a specific version. - `ID string` - `Type BetaManagedAgentsAgentReferenceType` - `const BetaManagedAgentsAgentReferenceTypeAgent BetaManagedAgentsAgentReferenceType = "agent"` - `Version int64` - `Type BetaManagedAgentsMultiagentType` - `const BetaManagedAgentsMultiagentTypeCoordinator BetaManagedAgentsMultiagentType = "coordinator"` ### Beta Managed Agents Multiagent Params - `type BetaManagedAgentsMultiagentParamsResp struct{…}` A coordinator topology: the session's primary thread orchestrates work by spawning session threads, each running an agent drawn from the `agents` roster. - `Agents []BetaManagedAgentsMultiagentRosterEntryParamsUnionResp` Agents the coordinator may spawn as session threads. 1–20 entries. Each entry is an agent ID string, a versioned `{"type":"agent","id","version"}` reference, or `{"type":"self"}` to allow recursive self-invocation. Entries must reference distinct agents (after resolving `self` and string forms); at most one `self`. Referenced agents must exist, must not be archived, and must not themselves have `multiagent` set (depth limit 1). - `string` - `type BetaManagedAgentsAgentParamsResp struct{…}` Specification for an Agent. Provide a specific `version` or use the short-form `agent="agent_id"` for the most recent version - `ID string` The `agent` ID. - `Type BetaManagedAgentsAgentParamsType` - `const BetaManagedAgentsAgentParamsTypeAgent BetaManagedAgentsAgentParamsType = "agent"` - `Version int64` The specific `agent` version to use. Omit to use the latest version. Must be at least 1 if specified. - `type BetaManagedAgentsMultiagentSelfParamsResp struct{…}` Sentinel roster entry meaning "the agent that owns this configuration". Resolved server-side to a concrete agent reference. - `Type BetaManagedAgentsMultiagentSelfParamsType` - `const BetaManagedAgentsMultiagentSelfParamsTypeSelf BetaManagedAgentsMultiagentSelfParamsType = "self"` - `Type BetaManagedAgentsMultiagentParamsType` - `const BetaManagedAgentsMultiagentParamsTypeCoordinator BetaManagedAgentsMultiagentParamsType = "coordinator"` ### Beta Managed Agents Multiagent Roster Entry Params - `type BetaManagedAgentsMultiagentRosterEntryParamsUnionResp interface{…}` An entry in a multiagent roster: an agent ID string, a versioned agent reference, or `self`. - `string` - `type BetaManagedAgentsAgentParamsResp struct{…}` Specification for an Agent. Provide a specific `version` or use the short-form `agent="agent_id"` for the most recent version - `ID string` The `agent` ID. - `Type BetaManagedAgentsAgentParamsType` - `const BetaManagedAgentsAgentParamsTypeAgent BetaManagedAgentsAgentParamsType = "agent"` - `Version int64` The specific `agent` version to use. Omit to use the latest version. Must be at least 1 if specified. - `type BetaManagedAgentsMultiagentSelfParamsResp struct{…}` Sentinel roster entry meaning "the agent that owns this configuration". Resolved server-side to a concrete agent reference. - `Type BetaManagedAgentsMultiagentSelfParamsType` - `const BetaManagedAgentsMultiagentSelfParamsTypeSelf BetaManagedAgentsMultiagentSelfParamsType = "self"` ### Beta Managed Agents Outcome Evaluation Resource - `type BetaManagedAgentsOutcomeEvaluationResource struct{…}` Evaluation state for a single outcome defined via a define_outcome event. - `CompletedAt Time` A timestamp in RFC 3339 format - `Description string` What the agent should produce. - `Explanation string` Grader's verdict text from the most recent evaluation. For satisfied, explains why criteria are met; for needs_revision (intermediate), what's missing; for failed, why unrecoverable. - `Iteration int64` 0-indexed revision cycle the outcome is currently on. - `OutcomeID string` Server-generated outc_ ID for this outcome. - `Result string` Current evaluation state. `pending` before the agent begins work; `running` while producing or revising; `evaluating` while the grader scores; `satisfied`/`max_iterations_reached`/`failed`/`interrupted` are terminal. - `Type BetaManagedAgentsOutcomeEvaluationResourceType` - `const BetaManagedAgentsOutcomeEvaluationResourceTypeOutcomeEvaluation BetaManagedAgentsOutcomeEvaluationResourceType = "outcome_evaluation"` ### Beta Managed Agents Session - `type BetaManagedAgentsSession struct{…}` A Managed Agents `session`. - `ID string` - `Agent BetaManagedAgentsSessionAgent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Multiagent BetaManagedAgentsSessionMultiagentCoordinator` Resolved coordinator topology with full agent definitions for each roster member. - `Agents []BetaManagedAgentsSessionThreadAgent` Full `agent` definitions the coordinator may spawn as session threads. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `Type BetaManagedAgentsSessionMultiagentCoordinatorType` - `const BetaManagedAgentsSessionMultiagentCoordinatorTypeCoordinator BetaManagedAgentsSessionMultiagentCoordinatorType = "coordinator"` - `Name string` - `Skills []BetaManagedAgentsSessionAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `System string` - `Tools []BetaManagedAgentsSessionAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `type BetaManagedAgentsMCPToolset struct{…}` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Type BetaManagedAgentsSessionAgentType` - `const BetaManagedAgentsSessionAgentTypeAgent BetaManagedAgentsSessionAgentType = "agent"` - `Version int64` - `ArchivedAt Time` A timestamp in RFC 3339 format - `CreatedAt Time` A timestamp in RFC 3339 format - `EnvironmentID string` - `Metadata map[string, string]` - `OutcomeEvaluations []BetaManagedAgentsOutcomeEvaluationResource` Per-outcome evaluation state. One entry per define_outcome event sent to the session. - `CompletedAt Time` A timestamp in RFC 3339 format - `Description string` What the agent should produce. - `Explanation string` Grader's verdict text from the most recent evaluation. For satisfied, explains why criteria are met; for needs_revision (intermediate), what's missing; for failed, why unrecoverable. - `Iteration int64` 0-indexed revision cycle the outcome is currently on. - `OutcomeID string` Server-generated outc_ ID for this outcome. - `Result string` Current evaluation state. `pending` before the agent begins work; `running` while producing or revising; `evaluating` while the grader scores; `satisfied`/`max_iterations_reached`/`failed`/`interrupted` are terminal. - `Type BetaManagedAgentsOutcomeEvaluationResourceType` - `const BetaManagedAgentsOutcomeEvaluationResourceTypeOutcomeEvaluation BetaManagedAgentsOutcomeEvaluationResourceType = "outcome_evaluation"` - `Resources []BetaManagedAgentsSessionResourceUnion` - `type BetaManagedAgentsGitHubRepositoryResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `MountPath string` - `Type BetaManagedAgentsGitHubRepositoryResourceType` - `const BetaManagedAgentsGitHubRepositoryResourceTypeGitHubRepository BetaManagedAgentsGitHubRepositoryResourceType = "github_repository"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `URL string` - `Checkout BetaManagedAgentsGitHubRepositoryResourceCheckoutUnion` - `type BetaManagedAgentsBranchCheckout struct{…}` - `Name string` Branch name to check out. - `Type BetaManagedAgentsBranchCheckoutType` - `const BetaManagedAgentsBranchCheckoutTypeBranch BetaManagedAgentsBranchCheckoutType = "branch"` - `type BetaManagedAgentsCommitCheckout struct{…}` - `Sha string` Full commit SHA to check out. - `Type BetaManagedAgentsCommitCheckoutType` - `const BetaManagedAgentsCommitCheckoutTypeCommit BetaManagedAgentsCommitCheckoutType = "commit"` - `type BetaManagedAgentsFileResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `FileID string` - `MountPath string` - `Type BetaManagedAgentsFileResourceType` - `const BetaManagedAgentsFileResourceTypeFile BetaManagedAgentsFileResourceType = "file"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsMemoryStoreResource struct{…}` A memory store attached to an agent session. - `MemoryStoreID string` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type BetaManagedAgentsMemoryStoreResourceType` - `const BetaManagedAgentsMemoryStoreResourceTypeMemoryStore BetaManagedAgentsMemoryStoreResourceType = "memory_store"` - `Access BetaManagedAgentsMemoryStoreResourceAccess` Access mode for an attached memory store. - `const BetaManagedAgentsMemoryStoreResourceAccessReadWrite BetaManagedAgentsMemoryStoreResourceAccess = "read_write"` - `const BetaManagedAgentsMemoryStoreResourceAccessReadOnly BetaManagedAgentsMemoryStoreResourceAccess = "read_only"` - `Description string` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Instructions string` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `MountPath string` Filesystem path where the store is mounted in the session container, e.g. /mnt/memory/user-preferences. Derived from the store's name. Output-only. - `Name string` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. - `Stats BetaManagedAgentsSessionStats` Timing statistics for a session. - `ActiveSeconds float64` Cumulative time in seconds the session spent in running status. Excludes idle time. - `DurationSeconds float64` Elapsed time since session creation in seconds. For terminated sessions, frozen at the final update. - `Status BetaManagedAgentsSessionStatus` SessionStatus enum - `const BetaManagedAgentsSessionStatusRescheduling BetaManagedAgentsSessionStatus = "rescheduling"` - `const BetaManagedAgentsSessionStatusRunning BetaManagedAgentsSessionStatus = "running"` - `const BetaManagedAgentsSessionStatusIdle BetaManagedAgentsSessionStatus = "idle"` - `const BetaManagedAgentsSessionStatusTerminated BetaManagedAgentsSessionStatus = "terminated"` - `Title string` - `Type BetaManagedAgentsSessionType` - `const BetaManagedAgentsSessionTypeSession BetaManagedAgentsSessionType = "session"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `Usage BetaManagedAgentsSessionUsage` Cumulative token usage for a session across all turns. - `CacheCreation BetaManagedAgentsCacheCreationUsage` Prompt-cache creation token usage broken down by cache lifetime. - `Ephemeral1hInputTokens int64` Tokens used to create 1-hour ephemeral cache entries. - `Ephemeral5mInputTokens int64` Tokens used to create 5-minute ephemeral cache entries. - `CacheReadInputTokens int64` Total tokens read from prompt cache. - `InputTokens int64` Total input tokens consumed across all turns. - `OutputTokens int64` Total output tokens generated across all turns. - `VaultIDs []string` Vault IDs attached to the session at creation. Empty when no vaults were supplied. - `DeploymentID string` Deployment ID when the session was created from a deployment reference. Null otherwise. ### Beta Managed Agents Session Agent - `type BetaManagedAgentsSessionAgent struct{…}` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Multiagent BetaManagedAgentsSessionMultiagentCoordinator` Resolved coordinator topology with full agent definitions for each roster member. - `Agents []BetaManagedAgentsSessionThreadAgent` Full `agent` definitions the coordinator may spawn as session threads. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `Type BetaManagedAgentsSessionMultiagentCoordinatorType` - `const BetaManagedAgentsSessionMultiagentCoordinatorTypeCoordinator BetaManagedAgentsSessionMultiagentCoordinatorType = "coordinator"` - `Name string` - `Skills []BetaManagedAgentsSessionAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `System string` - `Tools []BetaManagedAgentsSessionAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `type BetaManagedAgentsMCPToolset struct{…}` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Type BetaManagedAgentsSessionAgentType` - `const BetaManagedAgentsSessionAgentTypeAgent BetaManagedAgentsSessionAgentType = "agent"` - `Version int64` ### Beta Managed Agents Session Agent Update - `type BetaManagedAgentsSessionAgentUpdate struct{…}` Mid-session agent configuration update. Only `tools` and `mcp_servers` are updatable. Full replacement: the provided array becomes the new value. To preserve existing entries, GET the session, modify the array, and POST it back. - `MCPServers []BetaManagedAgentsURLMCPServerParamsResp` Replacement MCP server list. Full replacement: the provided array becomes the new value. Send an empty array to clear; omit to preserve. - `Name string` Unique name for this server, referenced by mcp_toolset configurations. 1-255 characters. - `Type BetaManagedAgentsURLMCPServerParamsType` - `const BetaManagedAgentsURLMCPServerParamsTypeURL BetaManagedAgentsURLMCPServerParamsType = "url"` - `URL string` Endpoint URL for the MCP server. - `Tools []BetaManagedAgentsSessionAgentUpdateToolUnion` Replacement tool list. Full replacement: the provided array becomes the new value. Send an empty array to clear; omit to preserve. - `type BetaManagedAgentsAgentToolset20260401ParamsResp struct{…}` Configuration for built-in agent tools. Use this to enable or disable groups of tools available to the agent. - `Type BetaManagedAgentsAgentToolset20260401ParamsType` - `const BetaManagedAgentsAgentToolset20260401ParamsTypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401ParamsType = "agent_toolset_20260401"` - `Configs []BetaManagedAgentsAgentToolConfigParamsResp` Per-tool configuration overrides. - `Name BetaManagedAgentsAgentToolConfigParamsName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigParamsNameBash BetaManagedAgentsAgentToolConfigParamsName = "bash"` - `const BetaManagedAgentsAgentToolConfigParamsNameEdit BetaManagedAgentsAgentToolConfigParamsName = "edit"` - `const BetaManagedAgentsAgentToolConfigParamsNameRead BetaManagedAgentsAgentToolConfigParamsName = "read"` - `const BetaManagedAgentsAgentToolConfigParamsNameWrite BetaManagedAgentsAgentToolConfigParamsName = "write"` - `const BetaManagedAgentsAgentToolConfigParamsNameGlob BetaManagedAgentsAgentToolConfigParamsName = "glob"` - `const BetaManagedAgentsAgentToolConfigParamsNameGrep BetaManagedAgentsAgentToolConfigParamsName = "grep"` - `const BetaManagedAgentsAgentToolConfigParamsNameWebFetch BetaManagedAgentsAgentToolConfigParamsName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigParamsNameWebSearch BetaManagedAgentsAgentToolConfigParamsName = "web_search"` - `Enabled bool` Whether this tool is enabled and available to Claude. Overrides the default_config setting. - `PermissionPolicy BetaManagedAgentsAgentToolConfigParamsPermissionPolicyUnionResp` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfigParamsResp` Default configuration for all tools in a toolset. - `Enabled bool` Whether tools are enabled and available to Claude by default. Defaults to true if not specified. - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigParamsPermissionPolicyUnionResp` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `type BetaManagedAgentsMCPToolsetParamsResp struct{…}` Configuration for tools from an MCP server defined in `mcp_servers`. - `MCPServerName string` Name of the MCP server. Must match a server name from the mcp_servers array. 1-255 characters. - `Type BetaManagedAgentsMCPToolsetParamsType` - `const BetaManagedAgentsMCPToolsetParamsTypeMCPToolset BetaManagedAgentsMCPToolsetParamsType = "mcp_toolset"` - `Configs []BetaManagedAgentsMCPToolConfigParamsResp` Per-tool configuration overrides. - `Name string` Name of the MCP tool to configure. 1-128 characters. - `Enabled bool` Whether this tool is enabled. Overrides the `default_config` setting. - `PermissionPolicy BetaManagedAgentsMCPToolConfigParamsPermissionPolicyUnionResp` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfigParamsResp` Default configuration for all tools from an MCP server. - `Enabled bool` Whether tools are enabled by default. Defaults to true if not specified. - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigParamsPermissionPolicyUnionResp` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `type BetaManagedAgentsCustomToolParamsResp struct{…}` A custom tool that is executed by the API client rather than the agent. When the agent calls this tool, an `agent.custom_tool_use` event is emitted and the session goes idle, waiting for the client to provide the result via a `user.custom_tool_result` event. - `Description string` Description of what the tool does, shown to the agent to help it decide when to use the tool. 1-1024 characters. - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` Unique name for the tool. 1-128 characters; letters, digits, underscores, and hyphens. - `Type BetaManagedAgentsCustomToolParamsType` - `const BetaManagedAgentsCustomToolParamsTypeCustom BetaManagedAgentsCustomToolParamsType = "custom"` ### Beta Managed Agents Session Multiagent Coordinator - `type BetaManagedAgentsSessionMultiagentCoordinator struct{…}` Resolved coordinator topology with full agent definitions for each roster member. - `Agents []BetaManagedAgentsSessionThreadAgent` Full `agent` definitions the coordinator may spawn as session threads. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `Type BetaManagedAgentsSessionMultiagentCoordinatorType` - `const BetaManagedAgentsSessionMultiagentCoordinatorTypeCoordinator BetaManagedAgentsSessionMultiagentCoordinatorType = "coordinator"` ### Beta Managed Agents Session Stats - `type BetaManagedAgentsSessionStats struct{…}` Timing statistics for a session. - `ActiveSeconds float64` Cumulative time in seconds the session spent in running status. Excludes idle time. - `DurationSeconds float64` Elapsed time since session creation in seconds. For terminated sessions, frozen at the final update. ### Beta Managed Agents Session Updated Event - `type BetaManagedAgentsSessionUpdatedEvent struct{…}` Emitted when an UpdateSession request changed at least one field. Carries only the fields that changed; absent fields were not part of the update. The new configuration applies from the next turn. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionUpdatedEventType` - `const BetaManagedAgentsSessionUpdatedEventTypeSessionUpdated BetaManagedAgentsSessionUpdatedEventType = "session.updated"` - `Agent BetaManagedAgentsSessionAgent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Multiagent BetaManagedAgentsSessionMultiagentCoordinator` Resolved coordinator topology with full agent definitions for each roster member. - `Agents []BetaManagedAgentsSessionThreadAgent` Full `agent` definitions the coordinator may spawn as session threads. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `Type BetaManagedAgentsSessionMultiagentCoordinatorType` - `const BetaManagedAgentsSessionMultiagentCoordinatorTypeCoordinator BetaManagedAgentsSessionMultiagentCoordinatorType = "coordinator"` - `Name string` - `Skills []BetaManagedAgentsSessionAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `System string` - `Tools []BetaManagedAgentsSessionAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `type BetaManagedAgentsMCPToolset struct{…}` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Type BetaManagedAgentsSessionAgentType` - `const BetaManagedAgentsSessionAgentTypeAgent BetaManagedAgentsSessionAgentType = "agent"` - `Version int64` - `Metadata map[string, string]` The session's full metadata bag after the update. Present when the update set non-empty metadata; absent when metadata was unchanged or cleared to empty. - `Title string` The session's new title. Present only when the update changed it. ### Beta Managed Agents Session Usage - `type BetaManagedAgentsSessionUsage struct{…}` Cumulative token usage for a session across all turns. - `CacheCreation BetaManagedAgentsCacheCreationUsage` Prompt-cache creation token usage broken down by cache lifetime. - `Ephemeral1hInputTokens int64` Tokens used to create 1-hour ephemeral cache entries. - `Ephemeral5mInputTokens int64` Tokens used to create 5-minute ephemeral cache entries. - `CacheReadInputTokens int64` Total tokens read from prompt cache. - `InputTokens int64` Total input tokens consumed across all turns. - `OutputTokens int64` Total output tokens generated across all turns. ### Beta Managed Agents System Content Block - `type BetaManagedAgentsSystemContentBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsSystemContentBlockType` - `const BetaManagedAgentsSystemContentBlockTypeText BetaManagedAgentsSystemContentBlockType = "text"` ### Beta Managed Agents System Message Event - `type BetaManagedAgentsSystemMessageEvent struct{…}` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsSystemContentBlock` System content blocks. Text-only. - `Text string` The text content. - `Type BetaManagedAgentsSystemContentBlockType` - `const BetaManagedAgentsSystemContentBlockTypeText BetaManagedAgentsSystemContentBlockType = "text"` - `Type BetaManagedAgentsSystemMessageEventType` - `const BetaManagedAgentsSystemMessageEventTypeSystemMessage BetaManagedAgentsSystemMessageEventType = "system.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format ### Beta Managed Agents User Tool Result Event - `type BetaManagedAgentsUserToolResultEvent struct{…}` Event sent by the client providing the result of an agent-toolset tool execution. Only valid on `self_hosted` environments, where sandbox-routed tools are executed by the client rather than the server. - `ID string` Unique identifier for this event. - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolResultEventType` - `const BetaManagedAgentsUserToolResultEventTypeUserToolResult BetaManagedAgentsUserToolResultEventType = "user.tool_result"` - `Content []BetaManagedAgentsUserToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. # Events ## List Events `client.Beta.Sessions.Events.List(ctx, sessionID, params) (*PageCursor[BetaManagedAgentsSessionEventUnion], error)` **get** `/v1/sessions/{session_id}/events` List Events ### Parameters - `sessionID string` - `params BetaSessionEventListParams` - `CreatedAtGt param.Field[Time]` Query param: Return events created after this time (exclusive). - `CreatedAtGte param.Field[Time]` Query param: Return events created at or after this time (inclusive). - `CreatedAtLt param.Field[Time]` Query param: Return events created before this time (exclusive). - `CreatedAtLte param.Field[Time]` Query param: Return events created at or before this time (inclusive). - `Limit param.Field[int64]` Query param: Query parameter for limit - `Order param.Field[BetaSessionEventListParamsOrder]` Query param: Sort direction for results, ordered by created_at. Defaults to asc (chronological). - `const BetaSessionEventListParamsOrderAsc BetaSessionEventListParamsOrder = "asc"` - `const BetaSessionEventListParamsOrderDesc BetaSessionEventListParamsOrder = "desc"` - `Page param.Field[string]` Query param: Opaque pagination cursor from a previous response's next_page. - `Types param.Field[[]string]` Query param: Filter by event type. Values match the `type` field on returned events (for example, `user.message` or `agent.tool_use`). Omit to return all event types. - `Betas param.Field[[]AnthropicBeta]` Header param: Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsSessionEventUnion interface{…}` Union type for all event types in a session. - `type BetaManagedAgentsUserMessageEvent struct{…}` A user message event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsUserMessageEventContentUnion` Array of content blocks comprising the user message. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `Type BetaManagedAgentsUserMessageEventType` - `const BetaManagedAgentsUserMessageEventTypeUserMessage BetaManagedAgentsUserMessageEventType = "user.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsUserInterruptEvent struct{…}` An interrupt event that pauses agent execution and returns control to the user. - `ID string` Unique identifier for this event. - `Type BetaManagedAgentsUserInterruptEventType` - `const BetaManagedAgentsUserInterruptEventTypeUserInterrupt BetaManagedAgentsUserInterruptEventType = "user.interrupt"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` If absent, interrupts every non-archived thread in a multiagent session (or the primary alone in a single-agent session). If present, interrupts only the named thread. - `type BetaManagedAgentsUserToolConfirmationEvent struct{…}` A tool confirmation event that approves or denies a pending tool execution. - `ID string` Unique identifier for this event. - `Result BetaManagedAgentsUserToolConfirmationEventResult` UserToolConfirmationResult enum - `const BetaManagedAgentsUserToolConfirmationEventResultAllow BetaManagedAgentsUserToolConfirmationEventResult = "allow"` - `const BetaManagedAgentsUserToolConfirmationEventResultDeny BetaManagedAgentsUserToolConfirmationEventResult = "deny"` - `ToolUseID string` The id of the `agent.tool_use` or `agent.mcp_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolConfirmationEventType` - `const BetaManagedAgentsUserToolConfirmationEventTypeUserToolConfirmation BetaManagedAgentsUserToolConfirmationEventType = "user.tool_confirmation"` - `DenyMessage string` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` When set, the confirmation routes to this subagent's thread rather than the primary. Echo this from the `session_thread_id` on the `agent.tool_use` or `agent.mcp_tool_use` event that prompted the approval. - `type BetaManagedAgentsUserCustomToolResultEvent struct{…}` Event sent by the client providing the result of a custom tool execution. - `ID string` Unique identifier for this event. - `CustomToolUseID string` The id of the `agent.custom_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserCustomToolResultEventType` - `const BetaManagedAgentsUserCustomToolResultEventTypeUserCustomToolResult BetaManagedAgentsUserCustomToolResultEventType = "user.custom_tool_result"` - `Content []BetaManagedAgentsUserCustomToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `type BetaManagedAgentsAgentCustomToolUseEvent struct{…}` Event emitted when the agent calls a custom tool. The session goes idle until the client sends a `user.custom_tool_result` event with the result. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `Name string` Name of the custom tool being called. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentCustomToolUseEventType` - `const BetaManagedAgentsAgentCustomToolUseEventTypeAgentCustomToolUse BetaManagedAgentsAgentCustomToolUseEventType = "agent.custom_tool_use"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its custom tool use on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.custom_tool_result` event to route the result back. - `type BetaManagedAgentsAgentMessageEvent struct{…}` An agent response event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsTextBlock` Array of text blocks comprising the agent response. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMessageEventType` - `const BetaManagedAgentsAgentMessageEventTypeAgentMessage BetaManagedAgentsAgentMessageEventType = "agent.message"` - `type BetaManagedAgentsAgentThinkingEvent struct{…}` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThinkingEventType` - `const BetaManagedAgentsAgentThinkingEventTypeAgentThinking BetaManagedAgentsAgentThinkingEventType = "agent.thinking"` - `type BetaManagedAgentsAgentMCPToolUseEvent struct{…}` Event emitted when the agent invokes a tool provided by an MCP server. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `MCPServerName string` Name of the MCP server providing the tool. - `Name string` Name of the MCP tool being used. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMCPToolUseEventType` - `const BetaManagedAgentsAgentMCPToolUseEventTypeAgentMCPToolUse BetaManagedAgentsAgentMCPToolUseEventType = "agent.mcp_tool_use"` - `EvaluatedPermission BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission` AgentEvaluatedPermission enum - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionAllow BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "allow"` - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionAsk BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "ask"` - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionDeny BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "deny"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.tool_confirmation` event to route the approval back. - `type BetaManagedAgentsAgentMCPToolResultEvent struct{…}` Event representing the result of an MCP tool execution. - `ID string` Unique identifier for this event. - `MCPToolUseID string` The id of the `agent.mcp_tool_use` event this result corresponds to. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMCPToolResultEventType` - `const BetaManagedAgentsAgentMCPToolResultEventTypeAgentMCPToolResult BetaManagedAgentsAgentMCPToolResultEventType = "agent.mcp_tool_result"` - `Content []BetaManagedAgentsAgentMCPToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsAgentToolUseEvent struct{…}` Event emitted when the agent invokes a built-in agent tool. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `Name string` Name of the agent tool being used. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentToolUseEventType` - `const BetaManagedAgentsAgentToolUseEventTypeAgentToolUse BetaManagedAgentsAgentToolUseEventType = "agent.tool_use"` - `EvaluatedPermission BetaManagedAgentsAgentToolUseEventEvaluatedPermission` AgentEvaluatedPermission enum - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionAllow BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "allow"` - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionAsk BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "ask"` - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionDeny BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "deny"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.tool_confirmation` event to route the approval back. - `type BetaManagedAgentsAgentToolResultEvent struct{…}` Event representing the result of an agent tool execution. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to. - `Type BetaManagedAgentsAgentToolResultEventType` - `const BetaManagedAgentsAgentToolResultEventTypeAgentToolResult BetaManagedAgentsAgentToolResultEventType = "agent.tool_result"` - `Content []BetaManagedAgentsAgentToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsAgentThreadMessageReceivedEvent struct{…}` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsAgentThreadMessageReceivedEventContentUnion` Message content blocks. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `FromSessionThreadID string` Public `sthr_` ID of the thread that sent the message. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThreadMessageReceivedEventType` - `const BetaManagedAgentsAgentThreadMessageReceivedEventTypeAgentThreadMessageReceived BetaManagedAgentsAgentThreadMessageReceivedEventType = "agent.thread_message_received"` - `FromAgentName string` Name of the callable agent this message came from. Absent when received from the primary agent. - `type BetaManagedAgentsAgentThreadMessageSentEvent struct{…}` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsAgentThreadMessageSentEventContentUnion` Message content blocks. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `ProcessedAt Time` A timestamp in RFC 3339 format - `ToSessionThreadID string` Public `sthr_` ID of the thread the message was sent to. - `Type BetaManagedAgentsAgentThreadMessageSentEventType` - `const BetaManagedAgentsAgentThreadMessageSentEventTypeAgentThreadMessageSent BetaManagedAgentsAgentThreadMessageSentEventType = "agent.thread_message_sent"` - `ToAgentName string` Name of the callable agent this message was sent to. Absent when sent to the primary agent. - `type BetaManagedAgentsAgentThreadContextCompactedEvent struct{…}` Indicates that context compaction (summarization) occurred during the session. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThreadContextCompactedEventType` - `const BetaManagedAgentsAgentThreadContextCompactedEventTypeAgentThreadContextCompacted BetaManagedAgentsAgentThreadContextCompactedEventType = "agent.thread_context_compacted"` - `type BetaManagedAgentsSessionErrorEvent struct{…}` An error event indicating a problem occurred during session execution. - `ID string` Unique identifier for this event. - `Error BetaManagedAgentsSessionErrorEventErrorUnion` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `type BetaManagedAgentsUnknownError struct{…}` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsUnknownErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` - `Type BetaManagedAgentsUnknownErrorType` - `const BetaManagedAgentsUnknownErrorTypeUnknownError BetaManagedAgentsUnknownErrorType = "unknown_error"` - `type BetaManagedAgentsModelOverloadedError struct{…}` The model is currently overloaded. Emitted after automatic retries are exhausted. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelOverloadedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelOverloadedErrorType` - `const BetaManagedAgentsModelOverloadedErrorTypeModelOverloadedError BetaManagedAgentsModelOverloadedErrorType = "model_overloaded_error"` - `type BetaManagedAgentsModelRateLimitedError struct{…}` The model request was rate-limited. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRateLimitedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelRateLimitedErrorType` - `const BetaManagedAgentsModelRateLimitedErrorTypeModelRateLimitedError BetaManagedAgentsModelRateLimitedErrorType = "model_rate_limited_error"` - `type BetaManagedAgentsModelRequestFailedError struct{…}` A model request failed for a reason other than overload or rate-limiting. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRequestFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelRequestFailedErrorType` - `const BetaManagedAgentsModelRequestFailedErrorTypeModelRequestFailedError BetaManagedAgentsModelRequestFailedErrorType = "model_request_failed_error"` - `type BetaManagedAgentsMCPConnectionFailedError struct{…}` Failed to connect to an MCP server. - `MCPServerName string` Name of the MCP server that failed to connect. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPConnectionFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsMCPConnectionFailedErrorType` - `const BetaManagedAgentsMCPConnectionFailedErrorTypeMCPConnectionFailedError BetaManagedAgentsMCPConnectionFailedErrorType = "mcp_connection_failed_error"` - `type BetaManagedAgentsMCPAuthenticationFailedError struct{…}` Authentication to an MCP server failed. - `MCPServerName string` Name of the MCP server that failed authentication. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPAuthenticationFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsMCPAuthenticationFailedErrorType` - `const BetaManagedAgentsMCPAuthenticationFailedErrorTypeMCPAuthenticationFailedError BetaManagedAgentsMCPAuthenticationFailedErrorType = "mcp_authentication_failed_error"` - `type BetaManagedAgentsBillingError struct{…}` The caller's organization or workspace cannot make model requests — out of credits or spend limit reached. Retrying with the same credentials will not succeed; the caller must resolve the billing state. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsBillingErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsBillingErrorType` - `const BetaManagedAgentsBillingErrorTypeBillingError BetaManagedAgentsBillingErrorType = "billing_error"` - `type BetaManagedAgentsCredentialHostUnreachableError struct{…}` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `CredentialID string` ID of the affected credential. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsCredentialHostUnreachableErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsCredentialHostUnreachableErrorType` - `const BetaManagedAgentsCredentialHostUnreachableErrorTypeCredentialHostUnreachableError BetaManagedAgentsCredentialHostUnreachableErrorType = "credential_host_unreachable_error"` - `VaultID string` ID of the vault containing the affected credential. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionErrorEventType` - `const BetaManagedAgentsSessionErrorEventTypeSessionError BetaManagedAgentsSessionErrorEventType = "session.error"` - `type BetaManagedAgentsSessionStatusRescheduledEvent struct{…}` Indicates the session is recovering from an error state and is rescheduled for execution. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusRescheduledEventType` - `const BetaManagedAgentsSessionStatusRescheduledEventTypeSessionStatusRescheduled BetaManagedAgentsSessionStatusRescheduledEventType = "session.status_rescheduled"` - `type BetaManagedAgentsSessionStatusRunningEvent struct{…}` Indicates the session is actively running and the agent is working. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusRunningEventType` - `const BetaManagedAgentsSessionStatusRunningEventTypeSessionStatusRunning BetaManagedAgentsSessionStatusRunningEventType = "session.status_running"` - `type BetaManagedAgentsSessionStatusIdleEvent struct{…}` Indicates the agent has paused and is awaiting user input. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `StopReason BetaManagedAgentsSessionStatusIdleEventStopReasonUnion` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `Type BetaManagedAgentsSessionEndTurnType` - `const BetaManagedAgentsSessionEndTurnTypeEndTurn BetaManagedAgentsSessionEndTurnType = "end_turn"` - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `EventIDs []string` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type BetaManagedAgentsSessionRequiresActionType` - `const BetaManagedAgentsSessionRequiresActionTypeRequiresAction BetaManagedAgentsSessionRequiresActionType = "requires_action"` - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionRetriesExhaustedType` - `const BetaManagedAgentsSessionRetriesExhaustedTypeRetriesExhausted BetaManagedAgentsSessionRetriesExhaustedType = "retries_exhausted"` - `Type BetaManagedAgentsSessionStatusIdleEventType` - `const BetaManagedAgentsSessionStatusIdleEventTypeSessionStatusIdle BetaManagedAgentsSessionStatusIdleEventType = "session.status_idle"` - `type BetaManagedAgentsSessionStatusTerminatedEvent struct{…}` Indicates the session has terminated, either due to an error or completion. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusTerminatedEventType` - `const BetaManagedAgentsSessionStatusTerminatedEventTypeSessionStatusTerminated BetaManagedAgentsSessionStatusTerminatedEventType = "session.status_terminated"` - `type BetaManagedAgentsSessionThreadCreatedEvent struct{…}` Emitted when a subagent is spawned as a new thread. Written to the parent thread's output stream so clients observing the session see child creation. - `ID string` Unique identifier for this event. - `AgentName string` Name of the callable agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public `sthr_` ID of the newly created thread. - `Type BetaManagedAgentsSessionThreadCreatedEventType` - `const BetaManagedAgentsSessionThreadCreatedEventTypeSessionThreadCreated BetaManagedAgentsSessionThreadCreatedEventType = "session.thread_created"` - `type BetaManagedAgentsSpanOutcomeEvaluationStartEvent struct{…}` Emitted when an outcome evaluation cycle begins. - `ID string` Unique identifier for this event. - `Iteration int64` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanOutcomeEvaluationStartEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationStartEventTypeSpanOutcomeEvaluationStart BetaManagedAgentsSpanOutcomeEvaluationStartEventType = "span.outcome_evaluation_start"` - `type BetaManagedAgentsSpanOutcomeEvaluationEndEvent struct{…}` Emitted when an outcome evaluation cycle completes. Carries the verdict and aggregate token usage. A verdict of `needs_revision` means another evaluation cycle follows; `satisfied`, `max_iterations_reached`, `failed`, or `interrupted` are terminal — no further evaluation cycles follow. - `ID string` Unique identifier for this event. - `Explanation string` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `Iteration int64` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `OutcomeEvaluationStartID string` The id of the corresponding `span.outcome_evaluation_start` event. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Result string` Evaluation verdict. 'satisfied': criteria met, session goes idle. 'needs_revision': criteria not met, another revision cycle follows. 'max_iterations_reached': evaluation budget exhausted with criteria still unmet — one final acknowledgment turn follows before the session goes idle, but no further evaluation runs. 'failed': grader determined the rubric does not apply to the deliverables. 'interrupted': user sent an interrupt while evaluation was in progress. - `Type BetaManagedAgentsSpanOutcomeEvaluationEndEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationEndEventTypeSpanOutcomeEvaluationEnd BetaManagedAgentsSpanOutcomeEvaluationEndEventType = "span.outcome_evaluation_end"` - `Usage BetaManagedAgentsSpanModelUsage` Token usage for a single model request. - `CacheCreationInputTokens int64` Tokens used to create prompt cache in this request. - `CacheReadInputTokens int64` Tokens read from prompt cache in this request. - `InputTokens int64` Input tokens consumed by this request. - `OutputTokens int64` Output tokens generated by this request. - `Speed BetaManagedAgentsSpanModelUsageSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsSpanModelUsageSpeedStandard BetaManagedAgentsSpanModelUsageSpeed = "standard"` - `const BetaManagedAgentsSpanModelUsageSpeedFast BetaManagedAgentsSpanModelUsageSpeed = "fast"` - `type BetaManagedAgentsSpanModelRequestStartEvent struct{…}` Emitted when a model request is initiated by the agent. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanModelRequestStartEventType` - `const BetaManagedAgentsSpanModelRequestStartEventTypeSpanModelRequestStart BetaManagedAgentsSpanModelRequestStartEventType = "span.model_request_start"` - `type BetaManagedAgentsSpanModelRequestEndEvent struct{…}` Emitted when a model request completes. - `ID string` Unique identifier for this event. - `IsError bool` Whether the model request resulted in an error. - `ModelRequestStartID string` The id of the corresponding `span.model_request_start` event. - `ModelUsage BetaManagedAgentsSpanModelUsage` Token usage for a single model request. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanModelRequestEndEventType` - `const BetaManagedAgentsSpanModelRequestEndEventTypeSpanModelRequestEnd BetaManagedAgentsSpanModelRequestEndEventType = "span.model_request_end"` - `type BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent struct{…}` Periodic heartbeat emitted while an outcome evaluation cycle is in progress. Distinguishes 'evaluation is actively running' from 'evaluation is stuck' between the corresponding `span.outcome_evaluation_start` and `span.outcome_evaluation_end` events. - `ID string` Unique identifier for this event. - `Iteration int64` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanOutcomeEvaluationOngoingEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationOngoingEventTypeSpanOutcomeEvaluationOngoing BetaManagedAgentsSpanOutcomeEvaluationOngoingEventType = "span.outcome_evaluation_ongoing"` - `type BetaManagedAgentsUserDefineOutcomeEvent struct{…}` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `ID string` Unique identifier for this event. - `Description string` What the agent should produce. Copied from the input event. - `MaxIterations int64` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `OutcomeID string` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Rubric BetaManagedAgentsUserDefineOutcomeEventRubricUnion` Rubric for grading the quality of an outcome. - `type BetaManagedAgentsFileRubric struct{…}` Rubric referenced by a file uploaded via the Files API. - `FileID string` ID of the rubric file. - `Type BetaManagedAgentsFileRubricType` - `const BetaManagedAgentsFileRubricTypeFile BetaManagedAgentsFileRubricType = "file"` - `type BetaManagedAgentsTextRubric struct{…}` Rubric content provided inline as text. - `Content string` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type BetaManagedAgentsTextRubricType` - `const BetaManagedAgentsTextRubricTypeText BetaManagedAgentsTextRubricType = "text"` - `Type BetaManagedAgentsUserDefineOutcomeEventType` - `const BetaManagedAgentsUserDefineOutcomeEventTypeUserDefineOutcome BetaManagedAgentsUserDefineOutcomeEventType = "user.define_outcome"` - `type BetaManagedAgentsSessionDeletedEvent struct{…}` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionDeletedEventType` - `const BetaManagedAgentsSessionDeletedEventTypeSessionDeleted BetaManagedAgentsSessionDeletedEventType = "session.deleted"` - `type BetaManagedAgentsSessionThreadStatusRunningEvent struct{…}` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that started running. - `Type BetaManagedAgentsSessionThreadStatusRunningEventType` - `const BetaManagedAgentsSessionThreadStatusRunningEventTypeSessionThreadStatusRunning BetaManagedAgentsSessionThreadStatusRunningEventType = "session.thread_status_running"` - `type BetaManagedAgentsSessionThreadStatusIdleEvent struct{…}` A session thread has yielded and is awaiting input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that went idle. - `StopReason BetaManagedAgentsSessionThreadStatusIdleEventStopReasonUnion` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionThreadStatusIdleEventType` - `const BetaManagedAgentsSessionThreadStatusIdleEventTypeSessionThreadStatusIdle BetaManagedAgentsSessionThreadStatusIdleEventType = "session.thread_status_idle"` - `type BetaManagedAgentsSessionThreadStatusTerminatedEvent struct{…}` A session thread has terminated and will accept no further input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that terminated. - `Type BetaManagedAgentsSessionThreadStatusTerminatedEventType` - `const BetaManagedAgentsSessionThreadStatusTerminatedEventTypeSessionThreadStatusTerminated BetaManagedAgentsSessionThreadStatusTerminatedEventType = "session.thread_status_terminated"` - `type BetaManagedAgentsUserToolResultEvent struct{…}` Event sent by the client providing the result of an agent-toolset tool execution. Only valid on `self_hosted` environments, where sandbox-routed tools are executed by the client rather than the server. - `ID string` Unique identifier for this event. - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolResultEventType` - `const BetaManagedAgentsUserToolResultEventTypeUserToolResult BetaManagedAgentsUserToolResultEventType = "user.tool_result"` - `Content []BetaManagedAgentsUserToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `type BetaManagedAgentsSessionThreadStatusRescheduledEvent struct{…}` A session thread hit a transient error and is retrying automatically. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that is retrying. - `Type BetaManagedAgentsSessionThreadStatusRescheduledEventType` - `const BetaManagedAgentsSessionThreadStatusRescheduledEventTypeSessionThreadStatusRescheduled BetaManagedAgentsSessionThreadStatusRescheduledEventType = "session.thread_status_rescheduled"` - `type BetaManagedAgentsSessionUpdatedEvent struct{…}` Emitted when an UpdateSession request changed at least one field. Carries only the fields that changed; absent fields were not part of the update. The new configuration applies from the next turn. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionUpdatedEventType` - `const BetaManagedAgentsSessionUpdatedEventTypeSessionUpdated BetaManagedAgentsSessionUpdatedEventType = "session.updated"` - `Agent BetaManagedAgentsSessionAgent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Multiagent BetaManagedAgentsSessionMultiagentCoordinator` Resolved coordinator topology with full agent definitions for each roster member. - `Agents []BetaManagedAgentsSessionThreadAgent` Full `agent` definitions the coordinator may spawn as session threads. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `Type BetaManagedAgentsSessionMultiagentCoordinatorType` - `const BetaManagedAgentsSessionMultiagentCoordinatorTypeCoordinator BetaManagedAgentsSessionMultiagentCoordinatorType = "coordinator"` - `Name string` - `Skills []BetaManagedAgentsSessionAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `System string` - `Tools []BetaManagedAgentsSessionAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `type BetaManagedAgentsMCPToolset struct{…}` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Type BetaManagedAgentsSessionAgentType` - `const BetaManagedAgentsSessionAgentTypeAgent BetaManagedAgentsSessionAgentType = "agent"` - `Version int64` - `Metadata map[string, string]` The session's full metadata bag after the update. Present when the update set non-empty metadata; absent when metadata was unchanged or cleared to empty. - `Title string` The session's new title. Present only when the update changed it. - `type BetaManagedAgentsSystemMessageEvent struct{…}` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsSystemContentBlock` System content blocks. Text-only. - `Text string` The text content. - `Type BetaManagedAgentsSystemContentBlockType` - `const BetaManagedAgentsSystemContentBlockTypeText BetaManagedAgentsSystemContentBlockType = "text"` - `Type BetaManagedAgentsSystemMessageEventType` - `const BetaManagedAgentsSystemMessageEventTypeSystemMessage BetaManagedAgentsSystemMessageEventType = "system.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) page, err := client.Beta.Sessions.Events.List( context.TODO(), "sesn_011CZkZAtmR3yMPDzynEDxu7", anthropic.BetaSessionEventListParams{ }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", page) } ``` #### Response ```json { "data": [ { "id": "sevt_011CZkZGOp0iBcp4kaQSihUmy", "content": [ { "text": "Where is my order #1234?", "type": "text" } ], "type": "user.message", "processed_at": "2026-03-15T10:00:00Z" }, { "id": "sevt_011CZkZHPq1jCdq5lbRTjiVnz", "content": [ { "text": "Let me look up order #1234 for you.", "type": "text" } ], "processed_at": "2026-03-15T10:00:00Z", "type": "agent.message" } ], "next_page": "page_MjAyNS0wNS0xNFQwMDowMDowMFo=" } ``` ## Send Events `client.Beta.Sessions.Events.Send(ctx, sessionID, params) (*BetaManagedAgentsSendSessionEvents, error)` **post** `/v1/sessions/{session_id}/events` Send Events ### Parameters - `sessionID string` - `params BetaSessionEventSendParams` - `Events param.Field[[]BetaManagedAgentsEventParamsUnionResp]` Body param: Events to send to the `session`. - `type BetaManagedAgentsUserMessageEventParamsResp struct{…}` Parameters for sending a user message to the session. - `Content []BetaManagedAgentsUserMessageEventParamsContentUnionResp` Array of content blocks for the user message. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `Type BetaManagedAgentsUserMessageEventParamsType` - `const BetaManagedAgentsUserMessageEventParamsTypeUserMessage BetaManagedAgentsUserMessageEventParamsType = "user.message"` - `type BetaManagedAgentsUserInterruptEventParamsResp struct{…}` Parameters for sending an interrupt to pause the agent. - `Type BetaManagedAgentsUserInterruptEventParamsType` - `const BetaManagedAgentsUserInterruptEventParamsTypeUserInterrupt BetaManagedAgentsUserInterruptEventParamsType = "user.interrupt"` - `SessionThreadID string` If absent, interrupts every non-archived thread in a multiagent session (or the primary alone in a single-agent session). If present, interrupts only the named thread. - `type BetaManagedAgentsUserToolConfirmationEventParamsResp struct{…}` Parameters for confirming or denying a tool execution request. - `Result BetaManagedAgentsUserToolConfirmationEventParamsResult` UserToolConfirmationResult enum - `const BetaManagedAgentsUserToolConfirmationEventParamsResultAllow BetaManagedAgentsUserToolConfirmationEventParamsResult = "allow"` - `const BetaManagedAgentsUserToolConfirmationEventParamsResultDeny BetaManagedAgentsUserToolConfirmationEventParamsResult = "deny"` - `ToolUseID string` The id of the `agent.tool_use` or `agent.mcp_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolConfirmationEventParamsType` - `const BetaManagedAgentsUserToolConfirmationEventParamsTypeUserToolConfirmation BetaManagedAgentsUserToolConfirmationEventParamsType = "user.tool_confirmation"` - `DenyMessage string` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `type BetaManagedAgentsUserCustomToolResultEventParamsResp struct{…}` Parameters for providing the result of a custom tool execution. - `CustomToolUseID string` The id of the `agent.custom_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserCustomToolResultEventParamsType` - `const BetaManagedAgentsUserCustomToolResultEventParamsTypeUserCustomToolResult BetaManagedAgentsUserCustomToolResultEventParamsType = "user.custom_tool_result"` - `Content []BetaManagedAgentsUserCustomToolResultEventParamsContentUnionResp` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsUserDefineOutcomeEventParamsResp struct{…}` Parameters for defining an outcome the agent should work toward. The agent begins work on receipt. - `Description string` What the agent should produce. This is the task specification. - `Rubric BetaManagedAgentsUserDefineOutcomeEventParamsRubricUnionResp` Rubric for grading the quality of an outcome. - `type BetaManagedAgentsFileRubricParamsResp struct{…}` Rubric referenced by a file uploaded via the Files API. - `FileID string` ID of the rubric file. - `Type BetaManagedAgentsFileRubricParamsType` - `const BetaManagedAgentsFileRubricParamsTypeFile BetaManagedAgentsFileRubricParamsType = "file"` - `type BetaManagedAgentsTextRubricParamsResp struct{…}` Rubric content provided inline as text. - `Content string` Rubric content. Plain text or markdown — the grader treats it as freeform text. Maximum 262144 characters. - `Type BetaManagedAgentsTextRubricParamsType` - `const BetaManagedAgentsTextRubricParamsTypeText BetaManagedAgentsTextRubricParamsType = "text"` - `Type BetaManagedAgentsUserDefineOutcomeEventParamsType` - `const BetaManagedAgentsUserDefineOutcomeEventParamsTypeUserDefineOutcome BetaManagedAgentsUserDefineOutcomeEventParamsType = "user.define_outcome"` - `MaxIterations int64` Eval→revision cycles before giving up. Default 3, max 20. - `type BetaManagedAgentsUserToolResultEventParamsResp struct{…}` Parameters for providing the result of an agent-toolset tool execution. Only valid on `self_hosted` environments, where sandbox-routed tools are executed by the client rather than the server. - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolResultEventParamsType` - `const BetaManagedAgentsUserToolResultEventParamsTypeUserToolResult BetaManagedAgentsUserToolResultEventParamsType = "user.tool_result"` - `Content []BetaManagedAgentsUserToolResultEventParamsContentUnionResp` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsSystemMessageEventParamsResp struct{…}` Privileged context for the accompanying turn and all subsequent turns, appended to the session's system context as a `role: "system"` turn rather than replacing the top-level system prompt. At most one per request: it must be the final event and immediately follow the `user.message`, `user.tool_result`, or `user.custom_tool_result` it accompanies. Only supported on models that accept mid-conversation system messages. - `Content []BetaManagedAgentsSystemContentBlock` System content blocks to append. Text-only. - `Text string` The text content. - `Type BetaManagedAgentsSystemContentBlockType` - `const BetaManagedAgentsSystemContentBlockTypeText BetaManagedAgentsSystemContentBlockType = "text"` - `Type BetaManagedAgentsSystemMessageEventParamsType` - `const BetaManagedAgentsSystemMessageEventParamsTypeSystemMessage BetaManagedAgentsSystemMessageEventParamsType = "system.message"` - `Betas param.Field[[]AnthropicBeta]` Header param: Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsSendSessionEvents struct{…}` Events that were successfully sent to the session. - `Data []BetaManagedAgentsSendSessionEventsDataUnion` Sent events - `type BetaManagedAgentsUserMessageEvent struct{…}` A user message event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsUserMessageEventContentUnion` Array of content blocks comprising the user message. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `Type BetaManagedAgentsUserMessageEventType` - `const BetaManagedAgentsUserMessageEventTypeUserMessage BetaManagedAgentsUserMessageEventType = "user.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsUserInterruptEvent struct{…}` An interrupt event that pauses agent execution and returns control to the user. - `ID string` Unique identifier for this event. - `Type BetaManagedAgentsUserInterruptEventType` - `const BetaManagedAgentsUserInterruptEventTypeUserInterrupt BetaManagedAgentsUserInterruptEventType = "user.interrupt"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` If absent, interrupts every non-archived thread in a multiagent session (or the primary alone in a single-agent session). If present, interrupts only the named thread. - `type BetaManagedAgentsUserToolConfirmationEvent struct{…}` A tool confirmation event that approves or denies a pending tool execution. - `ID string` Unique identifier for this event. - `Result BetaManagedAgentsUserToolConfirmationEventResult` UserToolConfirmationResult enum - `const BetaManagedAgentsUserToolConfirmationEventResultAllow BetaManagedAgentsUserToolConfirmationEventResult = "allow"` - `const BetaManagedAgentsUserToolConfirmationEventResultDeny BetaManagedAgentsUserToolConfirmationEventResult = "deny"` - `ToolUseID string` The id of the `agent.tool_use` or `agent.mcp_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolConfirmationEventType` - `const BetaManagedAgentsUserToolConfirmationEventTypeUserToolConfirmation BetaManagedAgentsUserToolConfirmationEventType = "user.tool_confirmation"` - `DenyMessage string` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` When set, the confirmation routes to this subagent's thread rather than the primary. Echo this from the `session_thread_id` on the `agent.tool_use` or `agent.mcp_tool_use` event that prompted the approval. - `type BetaManagedAgentsUserCustomToolResultEvent struct{…}` Event sent by the client providing the result of a custom tool execution. - `ID string` Unique identifier for this event. - `CustomToolUseID string` The id of the `agent.custom_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserCustomToolResultEventType` - `const BetaManagedAgentsUserCustomToolResultEventTypeUserCustomToolResult BetaManagedAgentsUserCustomToolResultEventType = "user.custom_tool_result"` - `Content []BetaManagedAgentsUserCustomToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `type BetaManagedAgentsUserDefineOutcomeEvent struct{…}` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `ID string` Unique identifier for this event. - `Description string` What the agent should produce. Copied from the input event. - `MaxIterations int64` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `OutcomeID string` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Rubric BetaManagedAgentsUserDefineOutcomeEventRubricUnion` Rubric for grading the quality of an outcome. - `type BetaManagedAgentsFileRubric struct{…}` Rubric referenced by a file uploaded via the Files API. - `FileID string` ID of the rubric file. - `Type BetaManagedAgentsFileRubricType` - `const BetaManagedAgentsFileRubricTypeFile BetaManagedAgentsFileRubricType = "file"` - `type BetaManagedAgentsTextRubric struct{…}` Rubric content provided inline as text. - `Content string` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type BetaManagedAgentsTextRubricType` - `const BetaManagedAgentsTextRubricTypeText BetaManagedAgentsTextRubricType = "text"` - `Type BetaManagedAgentsUserDefineOutcomeEventType` - `const BetaManagedAgentsUserDefineOutcomeEventTypeUserDefineOutcome BetaManagedAgentsUserDefineOutcomeEventType = "user.define_outcome"` - `type BetaManagedAgentsUserToolResultEvent struct{…}` Event sent by the client providing the result of an agent-toolset tool execution. Only valid on `self_hosted` environments, where sandbox-routed tools are executed by the client rather than the server. - `ID string` Unique identifier for this event. - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolResultEventType` - `const BetaManagedAgentsUserToolResultEventTypeUserToolResult BetaManagedAgentsUserToolResultEventType = "user.tool_result"` - `Content []BetaManagedAgentsUserToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `type BetaManagedAgentsSystemMessageEvent struct{…}` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsSystemContentBlock` System content blocks. Text-only. - `Text string` The text content. - `Type BetaManagedAgentsSystemContentBlockType` - `const BetaManagedAgentsSystemContentBlockTypeText BetaManagedAgentsSystemContentBlockType = "text"` - `Type BetaManagedAgentsSystemMessageEventType` - `const BetaManagedAgentsSystemMessageEventTypeSystemMessage BetaManagedAgentsSystemMessageEventType = "system.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) betaManagedAgentsSendSessionEvents, err := client.Beta.Sessions.Events.Send( context.TODO(), "sesn_011CZkZAtmR3yMPDzynEDxu7", anthropic.BetaSessionEventSendParams{ Events: []anthropic.BetaManagedAgentsEventParamsUnion{anthropic.BetaManagedAgentsEventParamsUnion{ OfUserMessage: &anthropic.BetaManagedAgentsUserMessageEventParams{ Content: []anthropic.BetaManagedAgentsUserMessageEventParamsContentUnion{anthropic.BetaManagedAgentsUserMessageEventParamsContentUnion{ OfText: &anthropic.BetaManagedAgentsTextBlockParam{ Text: "Where is my order #1234?", Type: anthropic.BetaManagedAgentsTextBlockTypeText, }, }}, Type: anthropic.BetaManagedAgentsUserMessageEventParamsTypeUserMessage, }, }}, }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", betaManagedAgentsSendSessionEvents.Data) } ``` #### Response ```json { "data": [ { "id": "sevt_011CZkZGOp0iBcp4kaQSihUmy", "content": [ { "text": "Where is my order #1234?", "type": "text" } ], "type": "user.message", "processed_at": "2026-03-15T10:00:00Z" } ] } ``` ## Stream Events `client.Beta.Sessions.Events.Stream(ctx, sessionID, query) (*BetaManagedAgentsStreamSessionEventsUnion, error)` **get** `/v1/sessions/{session_id}/events/stream` Stream Events ### Parameters - `sessionID string` - `query BetaSessionEventStreamParams` - `Betas param.Field[[]AnthropicBeta]` Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsStreamSessionEventsUnion interface{…}` Server-sent event in the session stream. - `type BetaManagedAgentsUserMessageEvent struct{…}` A user message event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsUserMessageEventContentUnion` Array of content blocks comprising the user message. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `Type BetaManagedAgentsUserMessageEventType` - `const BetaManagedAgentsUserMessageEventTypeUserMessage BetaManagedAgentsUserMessageEventType = "user.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsUserInterruptEvent struct{…}` An interrupt event that pauses agent execution and returns control to the user. - `ID string` Unique identifier for this event. - `Type BetaManagedAgentsUserInterruptEventType` - `const BetaManagedAgentsUserInterruptEventTypeUserInterrupt BetaManagedAgentsUserInterruptEventType = "user.interrupt"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` If absent, interrupts every non-archived thread in a multiagent session (or the primary alone in a single-agent session). If present, interrupts only the named thread. - `type BetaManagedAgentsUserToolConfirmationEvent struct{…}` A tool confirmation event that approves or denies a pending tool execution. - `ID string` Unique identifier for this event. - `Result BetaManagedAgentsUserToolConfirmationEventResult` UserToolConfirmationResult enum - `const BetaManagedAgentsUserToolConfirmationEventResultAllow BetaManagedAgentsUserToolConfirmationEventResult = "allow"` - `const BetaManagedAgentsUserToolConfirmationEventResultDeny BetaManagedAgentsUserToolConfirmationEventResult = "deny"` - `ToolUseID string` The id of the `agent.tool_use` or `agent.mcp_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolConfirmationEventType` - `const BetaManagedAgentsUserToolConfirmationEventTypeUserToolConfirmation BetaManagedAgentsUserToolConfirmationEventType = "user.tool_confirmation"` - `DenyMessage string` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` When set, the confirmation routes to this subagent's thread rather than the primary. Echo this from the `session_thread_id` on the `agent.tool_use` or `agent.mcp_tool_use` event that prompted the approval. - `type BetaManagedAgentsUserCustomToolResultEvent struct{…}` Event sent by the client providing the result of a custom tool execution. - `ID string` Unique identifier for this event. - `CustomToolUseID string` The id of the `agent.custom_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserCustomToolResultEventType` - `const BetaManagedAgentsUserCustomToolResultEventTypeUserCustomToolResult BetaManagedAgentsUserCustomToolResultEventType = "user.custom_tool_result"` - `Content []BetaManagedAgentsUserCustomToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `type BetaManagedAgentsAgentCustomToolUseEvent struct{…}` Event emitted when the agent calls a custom tool. The session goes idle until the client sends a `user.custom_tool_result` event with the result. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `Name string` Name of the custom tool being called. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentCustomToolUseEventType` - `const BetaManagedAgentsAgentCustomToolUseEventTypeAgentCustomToolUse BetaManagedAgentsAgentCustomToolUseEventType = "agent.custom_tool_use"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its custom tool use on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.custom_tool_result` event to route the result back. - `type BetaManagedAgentsAgentMessageEvent struct{…}` An agent response event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsTextBlock` Array of text blocks comprising the agent response. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMessageEventType` - `const BetaManagedAgentsAgentMessageEventTypeAgentMessage BetaManagedAgentsAgentMessageEventType = "agent.message"` - `type BetaManagedAgentsAgentThinkingEvent struct{…}` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThinkingEventType` - `const BetaManagedAgentsAgentThinkingEventTypeAgentThinking BetaManagedAgentsAgentThinkingEventType = "agent.thinking"` - `type BetaManagedAgentsAgentMCPToolUseEvent struct{…}` Event emitted when the agent invokes a tool provided by an MCP server. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `MCPServerName string` Name of the MCP server providing the tool. - `Name string` Name of the MCP tool being used. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMCPToolUseEventType` - `const BetaManagedAgentsAgentMCPToolUseEventTypeAgentMCPToolUse BetaManagedAgentsAgentMCPToolUseEventType = "agent.mcp_tool_use"` - `EvaluatedPermission BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission` AgentEvaluatedPermission enum - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionAllow BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "allow"` - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionAsk BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "ask"` - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionDeny BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "deny"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.tool_confirmation` event to route the approval back. - `type BetaManagedAgentsAgentMCPToolResultEvent struct{…}` Event representing the result of an MCP tool execution. - `ID string` Unique identifier for this event. - `MCPToolUseID string` The id of the `agent.mcp_tool_use` event this result corresponds to. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMCPToolResultEventType` - `const BetaManagedAgentsAgentMCPToolResultEventTypeAgentMCPToolResult BetaManagedAgentsAgentMCPToolResultEventType = "agent.mcp_tool_result"` - `Content []BetaManagedAgentsAgentMCPToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsAgentToolUseEvent struct{…}` Event emitted when the agent invokes a built-in agent tool. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `Name string` Name of the agent tool being used. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentToolUseEventType` - `const BetaManagedAgentsAgentToolUseEventTypeAgentToolUse BetaManagedAgentsAgentToolUseEventType = "agent.tool_use"` - `EvaluatedPermission BetaManagedAgentsAgentToolUseEventEvaluatedPermission` AgentEvaluatedPermission enum - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionAllow BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "allow"` - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionAsk BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "ask"` - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionDeny BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "deny"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.tool_confirmation` event to route the approval back. - `type BetaManagedAgentsAgentToolResultEvent struct{…}` Event representing the result of an agent tool execution. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to. - `Type BetaManagedAgentsAgentToolResultEventType` - `const BetaManagedAgentsAgentToolResultEventTypeAgentToolResult BetaManagedAgentsAgentToolResultEventType = "agent.tool_result"` - `Content []BetaManagedAgentsAgentToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsAgentThreadMessageReceivedEvent struct{…}` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsAgentThreadMessageReceivedEventContentUnion` Message content blocks. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `FromSessionThreadID string` Public `sthr_` ID of the thread that sent the message. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThreadMessageReceivedEventType` - `const BetaManagedAgentsAgentThreadMessageReceivedEventTypeAgentThreadMessageReceived BetaManagedAgentsAgentThreadMessageReceivedEventType = "agent.thread_message_received"` - `FromAgentName string` Name of the callable agent this message came from. Absent when received from the primary agent. - `type BetaManagedAgentsAgentThreadMessageSentEvent struct{…}` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsAgentThreadMessageSentEventContentUnion` Message content blocks. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `ProcessedAt Time` A timestamp in RFC 3339 format - `ToSessionThreadID string` Public `sthr_` ID of the thread the message was sent to. - `Type BetaManagedAgentsAgentThreadMessageSentEventType` - `const BetaManagedAgentsAgentThreadMessageSentEventTypeAgentThreadMessageSent BetaManagedAgentsAgentThreadMessageSentEventType = "agent.thread_message_sent"` - `ToAgentName string` Name of the callable agent this message was sent to. Absent when sent to the primary agent. - `type BetaManagedAgentsAgentThreadContextCompactedEvent struct{…}` Indicates that context compaction (summarization) occurred during the session. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThreadContextCompactedEventType` - `const BetaManagedAgentsAgentThreadContextCompactedEventTypeAgentThreadContextCompacted BetaManagedAgentsAgentThreadContextCompactedEventType = "agent.thread_context_compacted"` - `type BetaManagedAgentsSessionErrorEvent struct{…}` An error event indicating a problem occurred during session execution. - `ID string` Unique identifier for this event. - `Error BetaManagedAgentsSessionErrorEventErrorUnion` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `type BetaManagedAgentsUnknownError struct{…}` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsUnknownErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` - `Type BetaManagedAgentsUnknownErrorType` - `const BetaManagedAgentsUnknownErrorTypeUnknownError BetaManagedAgentsUnknownErrorType = "unknown_error"` - `type BetaManagedAgentsModelOverloadedError struct{…}` The model is currently overloaded. Emitted after automatic retries are exhausted. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelOverloadedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelOverloadedErrorType` - `const BetaManagedAgentsModelOverloadedErrorTypeModelOverloadedError BetaManagedAgentsModelOverloadedErrorType = "model_overloaded_error"` - `type BetaManagedAgentsModelRateLimitedError struct{…}` The model request was rate-limited. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRateLimitedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelRateLimitedErrorType` - `const BetaManagedAgentsModelRateLimitedErrorTypeModelRateLimitedError BetaManagedAgentsModelRateLimitedErrorType = "model_rate_limited_error"` - `type BetaManagedAgentsModelRequestFailedError struct{…}` A model request failed for a reason other than overload or rate-limiting. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRequestFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelRequestFailedErrorType` - `const BetaManagedAgentsModelRequestFailedErrorTypeModelRequestFailedError BetaManagedAgentsModelRequestFailedErrorType = "model_request_failed_error"` - `type BetaManagedAgentsMCPConnectionFailedError struct{…}` Failed to connect to an MCP server. - `MCPServerName string` Name of the MCP server that failed to connect. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPConnectionFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsMCPConnectionFailedErrorType` - `const BetaManagedAgentsMCPConnectionFailedErrorTypeMCPConnectionFailedError BetaManagedAgentsMCPConnectionFailedErrorType = "mcp_connection_failed_error"` - `type BetaManagedAgentsMCPAuthenticationFailedError struct{…}` Authentication to an MCP server failed. - `MCPServerName string` Name of the MCP server that failed authentication. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPAuthenticationFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsMCPAuthenticationFailedErrorType` - `const BetaManagedAgentsMCPAuthenticationFailedErrorTypeMCPAuthenticationFailedError BetaManagedAgentsMCPAuthenticationFailedErrorType = "mcp_authentication_failed_error"` - `type BetaManagedAgentsBillingError struct{…}` The caller's organization or workspace cannot make model requests — out of credits or spend limit reached. Retrying with the same credentials will not succeed; the caller must resolve the billing state. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsBillingErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsBillingErrorType` - `const BetaManagedAgentsBillingErrorTypeBillingError BetaManagedAgentsBillingErrorType = "billing_error"` - `type BetaManagedAgentsCredentialHostUnreachableError struct{…}` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `CredentialID string` ID of the affected credential. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsCredentialHostUnreachableErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsCredentialHostUnreachableErrorType` - `const BetaManagedAgentsCredentialHostUnreachableErrorTypeCredentialHostUnreachableError BetaManagedAgentsCredentialHostUnreachableErrorType = "credential_host_unreachable_error"` - `VaultID string` ID of the vault containing the affected credential. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionErrorEventType` - `const BetaManagedAgentsSessionErrorEventTypeSessionError BetaManagedAgentsSessionErrorEventType = "session.error"` - `type BetaManagedAgentsSessionStatusRescheduledEvent struct{…}` Indicates the session is recovering from an error state and is rescheduled for execution. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusRescheduledEventType` - `const BetaManagedAgentsSessionStatusRescheduledEventTypeSessionStatusRescheduled BetaManagedAgentsSessionStatusRescheduledEventType = "session.status_rescheduled"` - `type BetaManagedAgentsSessionStatusRunningEvent struct{…}` Indicates the session is actively running and the agent is working. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusRunningEventType` - `const BetaManagedAgentsSessionStatusRunningEventTypeSessionStatusRunning BetaManagedAgentsSessionStatusRunningEventType = "session.status_running"` - `type BetaManagedAgentsSessionStatusIdleEvent struct{…}` Indicates the agent has paused and is awaiting user input. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `StopReason BetaManagedAgentsSessionStatusIdleEventStopReasonUnion` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `Type BetaManagedAgentsSessionEndTurnType` - `const BetaManagedAgentsSessionEndTurnTypeEndTurn BetaManagedAgentsSessionEndTurnType = "end_turn"` - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `EventIDs []string` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type BetaManagedAgentsSessionRequiresActionType` - `const BetaManagedAgentsSessionRequiresActionTypeRequiresAction BetaManagedAgentsSessionRequiresActionType = "requires_action"` - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionRetriesExhaustedType` - `const BetaManagedAgentsSessionRetriesExhaustedTypeRetriesExhausted BetaManagedAgentsSessionRetriesExhaustedType = "retries_exhausted"` - `Type BetaManagedAgentsSessionStatusIdleEventType` - `const BetaManagedAgentsSessionStatusIdleEventTypeSessionStatusIdle BetaManagedAgentsSessionStatusIdleEventType = "session.status_idle"` - `type BetaManagedAgentsSessionStatusTerminatedEvent struct{…}` Indicates the session has terminated, either due to an error or completion. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusTerminatedEventType` - `const BetaManagedAgentsSessionStatusTerminatedEventTypeSessionStatusTerminated BetaManagedAgentsSessionStatusTerminatedEventType = "session.status_terminated"` - `type BetaManagedAgentsSessionThreadCreatedEvent struct{…}` Emitted when a subagent is spawned as a new thread. Written to the parent thread's output stream so clients observing the session see child creation. - `ID string` Unique identifier for this event. - `AgentName string` Name of the callable agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public `sthr_` ID of the newly created thread. - `Type BetaManagedAgentsSessionThreadCreatedEventType` - `const BetaManagedAgentsSessionThreadCreatedEventTypeSessionThreadCreated BetaManagedAgentsSessionThreadCreatedEventType = "session.thread_created"` - `type BetaManagedAgentsSpanOutcomeEvaluationStartEvent struct{…}` Emitted when an outcome evaluation cycle begins. - `ID string` Unique identifier for this event. - `Iteration int64` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanOutcomeEvaluationStartEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationStartEventTypeSpanOutcomeEvaluationStart BetaManagedAgentsSpanOutcomeEvaluationStartEventType = "span.outcome_evaluation_start"` - `type BetaManagedAgentsSpanOutcomeEvaluationEndEvent struct{…}` Emitted when an outcome evaluation cycle completes. Carries the verdict and aggregate token usage. A verdict of `needs_revision` means another evaluation cycle follows; `satisfied`, `max_iterations_reached`, `failed`, or `interrupted` are terminal — no further evaluation cycles follow. - `ID string` Unique identifier for this event. - `Explanation string` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `Iteration int64` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `OutcomeEvaluationStartID string` The id of the corresponding `span.outcome_evaluation_start` event. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Result string` Evaluation verdict. 'satisfied': criteria met, session goes idle. 'needs_revision': criteria not met, another revision cycle follows. 'max_iterations_reached': evaluation budget exhausted with criteria still unmet — one final acknowledgment turn follows before the session goes idle, but no further evaluation runs. 'failed': grader determined the rubric does not apply to the deliverables. 'interrupted': user sent an interrupt while evaluation was in progress. - `Type BetaManagedAgentsSpanOutcomeEvaluationEndEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationEndEventTypeSpanOutcomeEvaluationEnd BetaManagedAgentsSpanOutcomeEvaluationEndEventType = "span.outcome_evaluation_end"` - `Usage BetaManagedAgentsSpanModelUsage` Token usage for a single model request. - `CacheCreationInputTokens int64` Tokens used to create prompt cache in this request. - `CacheReadInputTokens int64` Tokens read from prompt cache in this request. - `InputTokens int64` Input tokens consumed by this request. - `OutputTokens int64` Output tokens generated by this request. - `Speed BetaManagedAgentsSpanModelUsageSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsSpanModelUsageSpeedStandard BetaManagedAgentsSpanModelUsageSpeed = "standard"` - `const BetaManagedAgentsSpanModelUsageSpeedFast BetaManagedAgentsSpanModelUsageSpeed = "fast"` - `type BetaManagedAgentsSpanModelRequestStartEvent struct{…}` Emitted when a model request is initiated by the agent. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanModelRequestStartEventType` - `const BetaManagedAgentsSpanModelRequestStartEventTypeSpanModelRequestStart BetaManagedAgentsSpanModelRequestStartEventType = "span.model_request_start"` - `type BetaManagedAgentsSpanModelRequestEndEvent struct{…}` Emitted when a model request completes. - `ID string` Unique identifier for this event. - `IsError bool` Whether the model request resulted in an error. - `ModelRequestStartID string` The id of the corresponding `span.model_request_start` event. - `ModelUsage BetaManagedAgentsSpanModelUsage` Token usage for a single model request. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanModelRequestEndEventType` - `const BetaManagedAgentsSpanModelRequestEndEventTypeSpanModelRequestEnd BetaManagedAgentsSpanModelRequestEndEventType = "span.model_request_end"` - `type BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent struct{…}` Periodic heartbeat emitted while an outcome evaluation cycle is in progress. Distinguishes 'evaluation is actively running' from 'evaluation is stuck' between the corresponding `span.outcome_evaluation_start` and `span.outcome_evaluation_end` events. - `ID string` Unique identifier for this event. - `Iteration int64` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanOutcomeEvaluationOngoingEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationOngoingEventTypeSpanOutcomeEvaluationOngoing BetaManagedAgentsSpanOutcomeEvaluationOngoingEventType = "span.outcome_evaluation_ongoing"` - `type BetaManagedAgentsUserDefineOutcomeEvent struct{…}` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `ID string` Unique identifier for this event. - `Description string` What the agent should produce. Copied from the input event. - `MaxIterations int64` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `OutcomeID string` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Rubric BetaManagedAgentsUserDefineOutcomeEventRubricUnion` Rubric for grading the quality of an outcome. - `type BetaManagedAgentsFileRubric struct{…}` Rubric referenced by a file uploaded via the Files API. - `FileID string` ID of the rubric file. - `Type BetaManagedAgentsFileRubricType` - `const BetaManagedAgentsFileRubricTypeFile BetaManagedAgentsFileRubricType = "file"` - `type BetaManagedAgentsTextRubric struct{…}` Rubric content provided inline as text. - `Content string` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type BetaManagedAgentsTextRubricType` - `const BetaManagedAgentsTextRubricTypeText BetaManagedAgentsTextRubricType = "text"` - `Type BetaManagedAgentsUserDefineOutcomeEventType` - `const BetaManagedAgentsUserDefineOutcomeEventTypeUserDefineOutcome BetaManagedAgentsUserDefineOutcomeEventType = "user.define_outcome"` - `type BetaManagedAgentsSessionDeletedEvent struct{…}` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionDeletedEventType` - `const BetaManagedAgentsSessionDeletedEventTypeSessionDeleted BetaManagedAgentsSessionDeletedEventType = "session.deleted"` - `type BetaManagedAgentsSessionThreadStatusRunningEvent struct{…}` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that started running. - `Type BetaManagedAgentsSessionThreadStatusRunningEventType` - `const BetaManagedAgentsSessionThreadStatusRunningEventTypeSessionThreadStatusRunning BetaManagedAgentsSessionThreadStatusRunningEventType = "session.thread_status_running"` - `type BetaManagedAgentsSessionThreadStatusIdleEvent struct{…}` A session thread has yielded and is awaiting input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that went idle. - `StopReason BetaManagedAgentsSessionThreadStatusIdleEventStopReasonUnion` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionThreadStatusIdleEventType` - `const BetaManagedAgentsSessionThreadStatusIdleEventTypeSessionThreadStatusIdle BetaManagedAgentsSessionThreadStatusIdleEventType = "session.thread_status_idle"` - `type BetaManagedAgentsSessionThreadStatusTerminatedEvent struct{…}` A session thread has terminated and will accept no further input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that terminated. - `Type BetaManagedAgentsSessionThreadStatusTerminatedEventType` - `const BetaManagedAgentsSessionThreadStatusTerminatedEventTypeSessionThreadStatusTerminated BetaManagedAgentsSessionThreadStatusTerminatedEventType = "session.thread_status_terminated"` - `type BetaManagedAgentsUserToolResultEvent struct{…}` Event sent by the client providing the result of an agent-toolset tool execution. Only valid on `self_hosted` environments, where sandbox-routed tools are executed by the client rather than the server. - `ID string` Unique identifier for this event. - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolResultEventType` - `const BetaManagedAgentsUserToolResultEventTypeUserToolResult BetaManagedAgentsUserToolResultEventType = "user.tool_result"` - `Content []BetaManagedAgentsUserToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `type BetaManagedAgentsSessionThreadStatusRescheduledEvent struct{…}` A session thread hit a transient error and is retrying automatically. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that is retrying. - `Type BetaManagedAgentsSessionThreadStatusRescheduledEventType` - `const BetaManagedAgentsSessionThreadStatusRescheduledEventTypeSessionThreadStatusRescheduled BetaManagedAgentsSessionThreadStatusRescheduledEventType = "session.thread_status_rescheduled"` - `type BetaManagedAgentsSessionUpdatedEvent struct{…}` Emitted when an UpdateSession request changed at least one field. Carries only the fields that changed; absent fields were not part of the update. The new configuration applies from the next turn. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionUpdatedEventType` - `const BetaManagedAgentsSessionUpdatedEventTypeSessionUpdated BetaManagedAgentsSessionUpdatedEventType = "session.updated"` - `Agent BetaManagedAgentsSessionAgent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Multiagent BetaManagedAgentsSessionMultiagentCoordinator` Resolved coordinator topology with full agent definitions for each roster member. - `Agents []BetaManagedAgentsSessionThreadAgent` Full `agent` definitions the coordinator may spawn as session threads. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `Type BetaManagedAgentsSessionMultiagentCoordinatorType` - `const BetaManagedAgentsSessionMultiagentCoordinatorTypeCoordinator BetaManagedAgentsSessionMultiagentCoordinatorType = "coordinator"` - `Name string` - `Skills []BetaManagedAgentsSessionAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `System string` - `Tools []BetaManagedAgentsSessionAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `type BetaManagedAgentsMCPToolset struct{…}` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Type BetaManagedAgentsSessionAgentType` - `const BetaManagedAgentsSessionAgentTypeAgent BetaManagedAgentsSessionAgentType = "agent"` - `Version int64` - `Metadata map[string, string]` The session's full metadata bag after the update. Present when the update set non-empty metadata; absent when metadata was unchanged or cleared to empty. - `Title string` The session's new title. Present only when the update changed it. - `type BetaManagedAgentsSystemMessageEvent struct{…}` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsSystemContentBlock` System content blocks. Text-only. - `Text string` The text content. - `Type BetaManagedAgentsSystemContentBlockType` - `const BetaManagedAgentsSystemContentBlockTypeText BetaManagedAgentsSystemContentBlockType = "text"` - `Type BetaManagedAgentsSystemMessageEventType` - `const BetaManagedAgentsSystemMessageEventTypeSystemMessage BetaManagedAgentsSystemMessageEventType = "system.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) stream := client.Beta.Sessions.Events.StreamEvents( context.TODO(), "sesn_011CZkZAtmR3yMPDzynEDxu7", anthropic.BetaSessionEventStreamParams{ }, ) for stream.Next() { fmt.Printf("%+v\n", stream.Current()) } err := stream.Err() if err != nil { panic(err.Error()) } } ``` #### Response ```json { "id": "sevt_011CZkZGOp0iBcp4kaQSihUmy", "content": [ { "text": "Where is my order #1234?", "type": "text" } ], "type": "user.message", "processed_at": "2026-03-15T10:00:00Z" } ``` ## Domain Types ### Beta Managed Agents Agent Custom Tool Use Event - `type BetaManagedAgentsAgentCustomToolUseEvent struct{…}` Event emitted when the agent calls a custom tool. The session goes idle until the client sends a `user.custom_tool_result` event with the result. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `Name string` Name of the custom tool being called. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentCustomToolUseEventType` - `const BetaManagedAgentsAgentCustomToolUseEventTypeAgentCustomToolUse BetaManagedAgentsAgentCustomToolUseEventType = "agent.custom_tool_use"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its custom tool use on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.custom_tool_result` event to route the result back. ### Beta Managed Agents Agent MCP Tool Result Event - `type BetaManagedAgentsAgentMCPToolResultEvent struct{…}` Event representing the result of an MCP tool execution. - `ID string` Unique identifier for this event. - `MCPToolUseID string` The id of the `agent.mcp_tool_use` event this result corresponds to. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMCPToolResultEventType` - `const BetaManagedAgentsAgentMCPToolResultEventTypeAgentMCPToolResult BetaManagedAgentsAgentMCPToolResultEventType = "agent.mcp_tool_result"` - `Content []BetaManagedAgentsAgentMCPToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. ### Beta Managed Agents Agent MCP Tool Use Event - `type BetaManagedAgentsAgentMCPToolUseEvent struct{…}` Event emitted when the agent invokes a tool provided by an MCP server. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `MCPServerName string` Name of the MCP server providing the tool. - `Name string` Name of the MCP tool being used. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMCPToolUseEventType` - `const BetaManagedAgentsAgentMCPToolUseEventTypeAgentMCPToolUse BetaManagedAgentsAgentMCPToolUseEventType = "agent.mcp_tool_use"` - `EvaluatedPermission BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission` AgentEvaluatedPermission enum - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionAllow BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "allow"` - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionAsk BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "ask"` - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionDeny BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "deny"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.tool_confirmation` event to route the approval back. ### Beta Managed Agents Agent Message Event - `type BetaManagedAgentsAgentMessageEvent struct{…}` An agent response event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsTextBlock` Array of text blocks comprising the agent response. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMessageEventType` - `const BetaManagedAgentsAgentMessageEventTypeAgentMessage BetaManagedAgentsAgentMessageEventType = "agent.message"` ### Beta Managed Agents Agent Thinking Event - `type BetaManagedAgentsAgentThinkingEvent struct{…}` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThinkingEventType` - `const BetaManagedAgentsAgentThinkingEventTypeAgentThinking BetaManagedAgentsAgentThinkingEventType = "agent.thinking"` ### Beta Managed Agents Agent Thread Context Compacted Event - `type BetaManagedAgentsAgentThreadContextCompactedEvent struct{…}` Indicates that context compaction (summarization) occurred during the session. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThreadContextCompactedEventType` - `const BetaManagedAgentsAgentThreadContextCompactedEventTypeAgentThreadContextCompacted BetaManagedAgentsAgentThreadContextCompactedEventType = "agent.thread_context_compacted"` ### Beta Managed Agents Agent Thread Message Received Event - `type BetaManagedAgentsAgentThreadMessageReceivedEvent struct{…}` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsAgentThreadMessageReceivedEventContentUnion` Message content blocks. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `FromSessionThreadID string` Public `sthr_` ID of the thread that sent the message. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThreadMessageReceivedEventType` - `const BetaManagedAgentsAgentThreadMessageReceivedEventTypeAgentThreadMessageReceived BetaManagedAgentsAgentThreadMessageReceivedEventType = "agent.thread_message_received"` - `FromAgentName string` Name of the callable agent this message came from. Absent when received from the primary agent. ### Beta Managed Agents Agent Thread Message Sent Event - `type BetaManagedAgentsAgentThreadMessageSentEvent struct{…}` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsAgentThreadMessageSentEventContentUnion` Message content blocks. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `ProcessedAt Time` A timestamp in RFC 3339 format - `ToSessionThreadID string` Public `sthr_` ID of the thread the message was sent to. - `Type BetaManagedAgentsAgentThreadMessageSentEventType` - `const BetaManagedAgentsAgentThreadMessageSentEventTypeAgentThreadMessageSent BetaManagedAgentsAgentThreadMessageSentEventType = "agent.thread_message_sent"` - `ToAgentName string` Name of the callable agent this message was sent to. Absent when sent to the primary agent. ### Beta Managed Agents Agent Tool Result Event - `type BetaManagedAgentsAgentToolResultEvent struct{…}` Event representing the result of an agent tool execution. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to. - `Type BetaManagedAgentsAgentToolResultEventType` - `const BetaManagedAgentsAgentToolResultEventTypeAgentToolResult BetaManagedAgentsAgentToolResultEventType = "agent.tool_result"` - `Content []BetaManagedAgentsAgentToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. ### Beta Managed Agents Agent Tool Use Event - `type BetaManagedAgentsAgentToolUseEvent struct{…}` Event emitted when the agent invokes a built-in agent tool. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `Name string` Name of the agent tool being used. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentToolUseEventType` - `const BetaManagedAgentsAgentToolUseEventTypeAgentToolUse BetaManagedAgentsAgentToolUseEventType = "agent.tool_use"` - `EvaluatedPermission BetaManagedAgentsAgentToolUseEventEvaluatedPermission` AgentEvaluatedPermission enum - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionAllow BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "allow"` - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionAsk BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "ask"` - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionDeny BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "deny"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.tool_confirmation` event to route the approval back. ### Beta Managed Agents Base64 Document Source - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` ### Beta Managed Agents Base64 Image Source - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` ### Beta Managed Agents Billing Error - `type BetaManagedAgentsBillingError struct{…}` The caller's organization or workspace cannot make model requests — out of credits or spend limit reached. Retrying with the same credentials will not succeed; the caller must resolve the billing state. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsBillingErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` - `Type BetaManagedAgentsBillingErrorType` - `const BetaManagedAgentsBillingErrorTypeBillingError BetaManagedAgentsBillingErrorType = "billing_error"` ### Beta Managed Agents Credential Host Unreachable Error - `type BetaManagedAgentsCredentialHostUnreachableError struct{…}` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `CredentialID string` ID of the affected credential. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsCredentialHostUnreachableErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` - `Type BetaManagedAgentsCredentialHostUnreachableErrorType` - `const BetaManagedAgentsCredentialHostUnreachableErrorTypeCredentialHostUnreachableError BetaManagedAgentsCredentialHostUnreachableErrorType = "credential_host_unreachable_error"` - `VaultID string` ID of the vault containing the affected credential. ### Beta Managed Agents Document Block - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. ### Beta Managed Agents Event Params - `type BetaManagedAgentsEventParamsUnionResp interface{…}` Union type for event parameters that can be sent to a session. - `type BetaManagedAgentsUserMessageEventParamsResp struct{…}` Parameters for sending a user message to the session. - `Content []BetaManagedAgentsUserMessageEventParamsContentUnionResp` Array of content blocks for the user message. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `Type BetaManagedAgentsUserMessageEventParamsType` - `const BetaManagedAgentsUserMessageEventParamsTypeUserMessage BetaManagedAgentsUserMessageEventParamsType = "user.message"` - `type BetaManagedAgentsUserInterruptEventParamsResp struct{…}` Parameters for sending an interrupt to pause the agent. - `Type BetaManagedAgentsUserInterruptEventParamsType` - `const BetaManagedAgentsUserInterruptEventParamsTypeUserInterrupt BetaManagedAgentsUserInterruptEventParamsType = "user.interrupt"` - `SessionThreadID string` If absent, interrupts every non-archived thread in a multiagent session (or the primary alone in a single-agent session). If present, interrupts only the named thread. - `type BetaManagedAgentsUserToolConfirmationEventParamsResp struct{…}` Parameters for confirming or denying a tool execution request. - `Result BetaManagedAgentsUserToolConfirmationEventParamsResult` UserToolConfirmationResult enum - `const BetaManagedAgentsUserToolConfirmationEventParamsResultAllow BetaManagedAgentsUserToolConfirmationEventParamsResult = "allow"` - `const BetaManagedAgentsUserToolConfirmationEventParamsResultDeny BetaManagedAgentsUserToolConfirmationEventParamsResult = "deny"` - `ToolUseID string` The id of the `agent.tool_use` or `agent.mcp_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolConfirmationEventParamsType` - `const BetaManagedAgentsUserToolConfirmationEventParamsTypeUserToolConfirmation BetaManagedAgentsUserToolConfirmationEventParamsType = "user.tool_confirmation"` - `DenyMessage string` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `type BetaManagedAgentsUserCustomToolResultEventParamsResp struct{…}` Parameters for providing the result of a custom tool execution. - `CustomToolUseID string` The id of the `agent.custom_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserCustomToolResultEventParamsType` - `const BetaManagedAgentsUserCustomToolResultEventParamsTypeUserCustomToolResult BetaManagedAgentsUserCustomToolResultEventParamsType = "user.custom_tool_result"` - `Content []BetaManagedAgentsUserCustomToolResultEventParamsContentUnionResp` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsUserDefineOutcomeEventParamsResp struct{…}` Parameters for defining an outcome the agent should work toward. The agent begins work on receipt. - `Description string` What the agent should produce. This is the task specification. - `Rubric BetaManagedAgentsUserDefineOutcomeEventParamsRubricUnionResp` Rubric for grading the quality of an outcome. - `type BetaManagedAgentsFileRubricParamsResp struct{…}` Rubric referenced by a file uploaded via the Files API. - `FileID string` ID of the rubric file. - `Type BetaManagedAgentsFileRubricParamsType` - `const BetaManagedAgentsFileRubricParamsTypeFile BetaManagedAgentsFileRubricParamsType = "file"` - `type BetaManagedAgentsTextRubricParamsResp struct{…}` Rubric content provided inline as text. - `Content string` Rubric content. Plain text or markdown — the grader treats it as freeform text. Maximum 262144 characters. - `Type BetaManagedAgentsTextRubricParamsType` - `const BetaManagedAgentsTextRubricParamsTypeText BetaManagedAgentsTextRubricParamsType = "text"` - `Type BetaManagedAgentsUserDefineOutcomeEventParamsType` - `const BetaManagedAgentsUserDefineOutcomeEventParamsTypeUserDefineOutcome BetaManagedAgentsUserDefineOutcomeEventParamsType = "user.define_outcome"` - `MaxIterations int64` Eval→revision cycles before giving up. Default 3, max 20. - `type BetaManagedAgentsUserToolResultEventParamsResp struct{…}` Parameters for providing the result of an agent-toolset tool execution. Only valid on `self_hosted` environments, where sandbox-routed tools are executed by the client rather than the server. - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolResultEventParamsType` - `const BetaManagedAgentsUserToolResultEventParamsTypeUserToolResult BetaManagedAgentsUserToolResultEventParamsType = "user.tool_result"` - `Content []BetaManagedAgentsUserToolResultEventParamsContentUnionResp` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsSystemMessageEventParamsResp struct{…}` Privileged context for the accompanying turn and all subsequent turns, appended to the session's system context as a `role: "system"` turn rather than replacing the top-level system prompt. At most one per request: it must be the final event and immediately follow the `user.message`, `user.tool_result`, or `user.custom_tool_result` it accompanies. Only supported on models that accept mid-conversation system messages. - `Content []BetaManagedAgentsSystemContentBlock` System content blocks to append. Text-only. - `Text string` The text content. - `Type BetaManagedAgentsSystemContentBlockType` - `const BetaManagedAgentsSystemContentBlockTypeText BetaManagedAgentsSystemContentBlockType = "text"` - `Type BetaManagedAgentsSystemMessageEventParamsType` - `const BetaManagedAgentsSystemMessageEventParamsTypeSystemMessage BetaManagedAgentsSystemMessageEventParamsType = "system.message"` ### Beta Managed Agents File Document Source - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` ### Beta Managed Agents File Image Source - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` ### Beta Managed Agents File Rubric - `type BetaManagedAgentsFileRubric struct{…}` Rubric referenced by a file uploaded via the Files API. - `FileID string` ID of the rubric file. - `Type BetaManagedAgentsFileRubricType` - `const BetaManagedAgentsFileRubricTypeFile BetaManagedAgentsFileRubricType = "file"` ### Beta Managed Agents File Rubric Params - `type BetaManagedAgentsFileRubricParamsResp struct{…}` Rubric referenced by a file uploaded via the Files API. - `FileID string` ID of the rubric file. - `Type BetaManagedAgentsFileRubricParamsType` - `const BetaManagedAgentsFileRubricParamsTypeFile BetaManagedAgentsFileRubricParamsType = "file"` ### Beta Managed Agents Image Block - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` ### Beta Managed Agents MCP Authentication Failed Error - `type BetaManagedAgentsMCPAuthenticationFailedError struct{…}` Authentication to an MCP server failed. - `MCPServerName string` Name of the MCP server that failed authentication. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPAuthenticationFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` - `Type BetaManagedAgentsMCPAuthenticationFailedErrorType` - `const BetaManagedAgentsMCPAuthenticationFailedErrorTypeMCPAuthenticationFailedError BetaManagedAgentsMCPAuthenticationFailedErrorType = "mcp_authentication_failed_error"` ### Beta Managed Agents MCP Connection Failed Error - `type BetaManagedAgentsMCPConnectionFailedError struct{…}` Failed to connect to an MCP server. - `MCPServerName string` Name of the MCP server that failed to connect. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPConnectionFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` - `Type BetaManagedAgentsMCPConnectionFailedErrorType` - `const BetaManagedAgentsMCPConnectionFailedErrorTypeMCPConnectionFailedError BetaManagedAgentsMCPConnectionFailedErrorType = "mcp_connection_failed_error"` ### Beta Managed Agents Model Overloaded Error - `type BetaManagedAgentsModelOverloadedError struct{…}` The model is currently overloaded. Emitted after automatic retries are exhausted. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelOverloadedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` - `Type BetaManagedAgentsModelOverloadedErrorType` - `const BetaManagedAgentsModelOverloadedErrorTypeModelOverloadedError BetaManagedAgentsModelOverloadedErrorType = "model_overloaded_error"` ### Beta Managed Agents Model Rate Limited Error - `type BetaManagedAgentsModelRateLimitedError struct{…}` The model request was rate-limited. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRateLimitedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` - `Type BetaManagedAgentsModelRateLimitedErrorType` - `const BetaManagedAgentsModelRateLimitedErrorTypeModelRateLimitedError BetaManagedAgentsModelRateLimitedErrorType = "model_rate_limited_error"` ### Beta Managed Agents Model Request Failed Error - `type BetaManagedAgentsModelRequestFailedError struct{…}` A model request failed for a reason other than overload or rate-limiting. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRequestFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` - `Type BetaManagedAgentsModelRequestFailedErrorType` - `const BetaManagedAgentsModelRequestFailedErrorTypeModelRequestFailedError BetaManagedAgentsModelRequestFailedErrorType = "model_request_failed_error"` ### Beta Managed Agents Plain Text Document Source - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` ### Beta Managed Agents Retry Status Exhausted - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` ### Beta Managed Agents Retry Status Retrying - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` ### Beta Managed Agents Retry Status Terminal - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` ### Beta Managed Agents Search Result Block - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` ### Beta Managed Agents Search Result Citations - `type BetaManagedAgentsSearchResultCitations struct{…}` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. ### Beta Managed Agents Search Result Content - `type BetaManagedAgentsSearchResultContent struct{…}` Text content within a search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` ### Beta Managed Agents Send Session Events - `type BetaManagedAgentsSendSessionEvents struct{…}` Events that were successfully sent to the session. - `Data []BetaManagedAgentsSendSessionEventsDataUnion` Sent events - `type BetaManagedAgentsUserMessageEvent struct{…}` A user message event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsUserMessageEventContentUnion` Array of content blocks comprising the user message. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `Type BetaManagedAgentsUserMessageEventType` - `const BetaManagedAgentsUserMessageEventTypeUserMessage BetaManagedAgentsUserMessageEventType = "user.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsUserInterruptEvent struct{…}` An interrupt event that pauses agent execution and returns control to the user. - `ID string` Unique identifier for this event. - `Type BetaManagedAgentsUserInterruptEventType` - `const BetaManagedAgentsUserInterruptEventTypeUserInterrupt BetaManagedAgentsUserInterruptEventType = "user.interrupt"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` If absent, interrupts every non-archived thread in a multiagent session (or the primary alone in a single-agent session). If present, interrupts only the named thread. - `type BetaManagedAgentsUserToolConfirmationEvent struct{…}` A tool confirmation event that approves or denies a pending tool execution. - `ID string` Unique identifier for this event. - `Result BetaManagedAgentsUserToolConfirmationEventResult` UserToolConfirmationResult enum - `const BetaManagedAgentsUserToolConfirmationEventResultAllow BetaManagedAgentsUserToolConfirmationEventResult = "allow"` - `const BetaManagedAgentsUserToolConfirmationEventResultDeny BetaManagedAgentsUserToolConfirmationEventResult = "deny"` - `ToolUseID string` The id of the `agent.tool_use` or `agent.mcp_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolConfirmationEventType` - `const BetaManagedAgentsUserToolConfirmationEventTypeUserToolConfirmation BetaManagedAgentsUserToolConfirmationEventType = "user.tool_confirmation"` - `DenyMessage string` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` When set, the confirmation routes to this subagent's thread rather than the primary. Echo this from the `session_thread_id` on the `agent.tool_use` or `agent.mcp_tool_use` event that prompted the approval. - `type BetaManagedAgentsUserCustomToolResultEvent struct{…}` Event sent by the client providing the result of a custom tool execution. - `ID string` Unique identifier for this event. - `CustomToolUseID string` The id of the `agent.custom_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserCustomToolResultEventType` - `const BetaManagedAgentsUserCustomToolResultEventTypeUserCustomToolResult BetaManagedAgentsUserCustomToolResultEventType = "user.custom_tool_result"` - `Content []BetaManagedAgentsUserCustomToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `type BetaManagedAgentsUserDefineOutcomeEvent struct{…}` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `ID string` Unique identifier for this event. - `Description string` What the agent should produce. Copied from the input event. - `MaxIterations int64` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `OutcomeID string` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Rubric BetaManagedAgentsUserDefineOutcomeEventRubricUnion` Rubric for grading the quality of an outcome. - `type BetaManagedAgentsFileRubric struct{…}` Rubric referenced by a file uploaded via the Files API. - `FileID string` ID of the rubric file. - `Type BetaManagedAgentsFileRubricType` - `const BetaManagedAgentsFileRubricTypeFile BetaManagedAgentsFileRubricType = "file"` - `type BetaManagedAgentsTextRubric struct{…}` Rubric content provided inline as text. - `Content string` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type BetaManagedAgentsTextRubricType` - `const BetaManagedAgentsTextRubricTypeText BetaManagedAgentsTextRubricType = "text"` - `Type BetaManagedAgentsUserDefineOutcomeEventType` - `const BetaManagedAgentsUserDefineOutcomeEventTypeUserDefineOutcome BetaManagedAgentsUserDefineOutcomeEventType = "user.define_outcome"` - `type BetaManagedAgentsUserToolResultEvent struct{…}` Event sent by the client providing the result of an agent-toolset tool execution. Only valid on `self_hosted` environments, where sandbox-routed tools are executed by the client rather than the server. - `ID string` Unique identifier for this event. - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolResultEventType` - `const BetaManagedAgentsUserToolResultEventTypeUserToolResult BetaManagedAgentsUserToolResultEventType = "user.tool_result"` - `Content []BetaManagedAgentsUserToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `type BetaManagedAgentsSystemMessageEvent struct{…}` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsSystemContentBlock` System content blocks. Text-only. - `Text string` The text content. - `Type BetaManagedAgentsSystemContentBlockType` - `const BetaManagedAgentsSystemContentBlockTypeText BetaManagedAgentsSystemContentBlockType = "text"` - `Type BetaManagedAgentsSystemMessageEventType` - `const BetaManagedAgentsSystemMessageEventTypeSystemMessage BetaManagedAgentsSystemMessageEventType = "system.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format ### Beta Managed Agents Session Deleted Event - `type BetaManagedAgentsSessionDeletedEvent struct{…}` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionDeletedEventType` - `const BetaManagedAgentsSessionDeletedEventTypeSessionDeleted BetaManagedAgentsSessionDeletedEventType = "session.deleted"` ### Beta Managed Agents Session End Turn - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `Type BetaManagedAgentsSessionEndTurnType` - `const BetaManagedAgentsSessionEndTurnTypeEndTurn BetaManagedAgentsSessionEndTurnType = "end_turn"` ### Beta Managed Agents Session Error Event - `type BetaManagedAgentsSessionErrorEvent struct{…}` An error event indicating a problem occurred during session execution. - `ID string` Unique identifier for this event. - `Error BetaManagedAgentsSessionErrorEventErrorUnion` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `type BetaManagedAgentsUnknownError struct{…}` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsUnknownErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` - `Type BetaManagedAgentsUnknownErrorType` - `const BetaManagedAgentsUnknownErrorTypeUnknownError BetaManagedAgentsUnknownErrorType = "unknown_error"` - `type BetaManagedAgentsModelOverloadedError struct{…}` The model is currently overloaded. Emitted after automatic retries are exhausted. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelOverloadedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelOverloadedErrorType` - `const BetaManagedAgentsModelOverloadedErrorTypeModelOverloadedError BetaManagedAgentsModelOverloadedErrorType = "model_overloaded_error"` - `type BetaManagedAgentsModelRateLimitedError struct{…}` The model request was rate-limited. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRateLimitedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelRateLimitedErrorType` - `const BetaManagedAgentsModelRateLimitedErrorTypeModelRateLimitedError BetaManagedAgentsModelRateLimitedErrorType = "model_rate_limited_error"` - `type BetaManagedAgentsModelRequestFailedError struct{…}` A model request failed for a reason other than overload or rate-limiting. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRequestFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelRequestFailedErrorType` - `const BetaManagedAgentsModelRequestFailedErrorTypeModelRequestFailedError BetaManagedAgentsModelRequestFailedErrorType = "model_request_failed_error"` - `type BetaManagedAgentsMCPConnectionFailedError struct{…}` Failed to connect to an MCP server. - `MCPServerName string` Name of the MCP server that failed to connect. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPConnectionFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsMCPConnectionFailedErrorType` - `const BetaManagedAgentsMCPConnectionFailedErrorTypeMCPConnectionFailedError BetaManagedAgentsMCPConnectionFailedErrorType = "mcp_connection_failed_error"` - `type BetaManagedAgentsMCPAuthenticationFailedError struct{…}` Authentication to an MCP server failed. - `MCPServerName string` Name of the MCP server that failed authentication. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPAuthenticationFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsMCPAuthenticationFailedErrorType` - `const BetaManagedAgentsMCPAuthenticationFailedErrorTypeMCPAuthenticationFailedError BetaManagedAgentsMCPAuthenticationFailedErrorType = "mcp_authentication_failed_error"` - `type BetaManagedAgentsBillingError struct{…}` The caller's organization or workspace cannot make model requests — out of credits or spend limit reached. Retrying with the same credentials will not succeed; the caller must resolve the billing state. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsBillingErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsBillingErrorType` - `const BetaManagedAgentsBillingErrorTypeBillingError BetaManagedAgentsBillingErrorType = "billing_error"` - `type BetaManagedAgentsCredentialHostUnreachableError struct{…}` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `CredentialID string` ID of the affected credential. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsCredentialHostUnreachableErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsCredentialHostUnreachableErrorType` - `const BetaManagedAgentsCredentialHostUnreachableErrorTypeCredentialHostUnreachableError BetaManagedAgentsCredentialHostUnreachableErrorType = "credential_host_unreachable_error"` - `VaultID string` ID of the vault containing the affected credential. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionErrorEventType` - `const BetaManagedAgentsSessionErrorEventTypeSessionError BetaManagedAgentsSessionErrorEventType = "session.error"` ### Beta Managed Agents Session Event - `type BetaManagedAgentsSessionEventUnion interface{…}` Union type for all event types in a session. - `type BetaManagedAgentsUserMessageEvent struct{…}` A user message event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsUserMessageEventContentUnion` Array of content blocks comprising the user message. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `Type BetaManagedAgentsUserMessageEventType` - `const BetaManagedAgentsUserMessageEventTypeUserMessage BetaManagedAgentsUserMessageEventType = "user.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsUserInterruptEvent struct{…}` An interrupt event that pauses agent execution and returns control to the user. - `ID string` Unique identifier for this event. - `Type BetaManagedAgentsUserInterruptEventType` - `const BetaManagedAgentsUserInterruptEventTypeUserInterrupt BetaManagedAgentsUserInterruptEventType = "user.interrupt"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` If absent, interrupts every non-archived thread in a multiagent session (or the primary alone in a single-agent session). If present, interrupts only the named thread. - `type BetaManagedAgentsUserToolConfirmationEvent struct{…}` A tool confirmation event that approves or denies a pending tool execution. - `ID string` Unique identifier for this event. - `Result BetaManagedAgentsUserToolConfirmationEventResult` UserToolConfirmationResult enum - `const BetaManagedAgentsUserToolConfirmationEventResultAllow BetaManagedAgentsUserToolConfirmationEventResult = "allow"` - `const BetaManagedAgentsUserToolConfirmationEventResultDeny BetaManagedAgentsUserToolConfirmationEventResult = "deny"` - `ToolUseID string` The id of the `agent.tool_use` or `agent.mcp_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolConfirmationEventType` - `const BetaManagedAgentsUserToolConfirmationEventTypeUserToolConfirmation BetaManagedAgentsUserToolConfirmationEventType = "user.tool_confirmation"` - `DenyMessage string` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` When set, the confirmation routes to this subagent's thread rather than the primary. Echo this from the `session_thread_id` on the `agent.tool_use` or `agent.mcp_tool_use` event that prompted the approval. - `type BetaManagedAgentsUserCustomToolResultEvent struct{…}` Event sent by the client providing the result of a custom tool execution. - `ID string` Unique identifier for this event. - `CustomToolUseID string` The id of the `agent.custom_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserCustomToolResultEventType` - `const BetaManagedAgentsUserCustomToolResultEventTypeUserCustomToolResult BetaManagedAgentsUserCustomToolResultEventType = "user.custom_tool_result"` - `Content []BetaManagedAgentsUserCustomToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `type BetaManagedAgentsAgentCustomToolUseEvent struct{…}` Event emitted when the agent calls a custom tool. The session goes idle until the client sends a `user.custom_tool_result` event with the result. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `Name string` Name of the custom tool being called. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentCustomToolUseEventType` - `const BetaManagedAgentsAgentCustomToolUseEventTypeAgentCustomToolUse BetaManagedAgentsAgentCustomToolUseEventType = "agent.custom_tool_use"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its custom tool use on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.custom_tool_result` event to route the result back. - `type BetaManagedAgentsAgentMessageEvent struct{…}` An agent response event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsTextBlock` Array of text blocks comprising the agent response. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMessageEventType` - `const BetaManagedAgentsAgentMessageEventTypeAgentMessage BetaManagedAgentsAgentMessageEventType = "agent.message"` - `type BetaManagedAgentsAgentThinkingEvent struct{…}` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThinkingEventType` - `const BetaManagedAgentsAgentThinkingEventTypeAgentThinking BetaManagedAgentsAgentThinkingEventType = "agent.thinking"` - `type BetaManagedAgentsAgentMCPToolUseEvent struct{…}` Event emitted when the agent invokes a tool provided by an MCP server. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `MCPServerName string` Name of the MCP server providing the tool. - `Name string` Name of the MCP tool being used. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMCPToolUseEventType` - `const BetaManagedAgentsAgentMCPToolUseEventTypeAgentMCPToolUse BetaManagedAgentsAgentMCPToolUseEventType = "agent.mcp_tool_use"` - `EvaluatedPermission BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission` AgentEvaluatedPermission enum - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionAllow BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "allow"` - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionAsk BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "ask"` - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionDeny BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "deny"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.tool_confirmation` event to route the approval back. - `type BetaManagedAgentsAgentMCPToolResultEvent struct{…}` Event representing the result of an MCP tool execution. - `ID string` Unique identifier for this event. - `MCPToolUseID string` The id of the `agent.mcp_tool_use` event this result corresponds to. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMCPToolResultEventType` - `const BetaManagedAgentsAgentMCPToolResultEventTypeAgentMCPToolResult BetaManagedAgentsAgentMCPToolResultEventType = "agent.mcp_tool_result"` - `Content []BetaManagedAgentsAgentMCPToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsAgentToolUseEvent struct{…}` Event emitted when the agent invokes a built-in agent tool. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `Name string` Name of the agent tool being used. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentToolUseEventType` - `const BetaManagedAgentsAgentToolUseEventTypeAgentToolUse BetaManagedAgentsAgentToolUseEventType = "agent.tool_use"` - `EvaluatedPermission BetaManagedAgentsAgentToolUseEventEvaluatedPermission` AgentEvaluatedPermission enum - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionAllow BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "allow"` - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionAsk BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "ask"` - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionDeny BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "deny"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.tool_confirmation` event to route the approval back. - `type BetaManagedAgentsAgentToolResultEvent struct{…}` Event representing the result of an agent tool execution. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to. - `Type BetaManagedAgentsAgentToolResultEventType` - `const BetaManagedAgentsAgentToolResultEventTypeAgentToolResult BetaManagedAgentsAgentToolResultEventType = "agent.tool_result"` - `Content []BetaManagedAgentsAgentToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsAgentThreadMessageReceivedEvent struct{…}` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsAgentThreadMessageReceivedEventContentUnion` Message content blocks. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `FromSessionThreadID string` Public `sthr_` ID of the thread that sent the message. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThreadMessageReceivedEventType` - `const BetaManagedAgentsAgentThreadMessageReceivedEventTypeAgentThreadMessageReceived BetaManagedAgentsAgentThreadMessageReceivedEventType = "agent.thread_message_received"` - `FromAgentName string` Name of the callable agent this message came from. Absent when received from the primary agent. - `type BetaManagedAgentsAgentThreadMessageSentEvent struct{…}` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsAgentThreadMessageSentEventContentUnion` Message content blocks. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `ProcessedAt Time` A timestamp in RFC 3339 format - `ToSessionThreadID string` Public `sthr_` ID of the thread the message was sent to. - `Type BetaManagedAgentsAgentThreadMessageSentEventType` - `const BetaManagedAgentsAgentThreadMessageSentEventTypeAgentThreadMessageSent BetaManagedAgentsAgentThreadMessageSentEventType = "agent.thread_message_sent"` - `ToAgentName string` Name of the callable agent this message was sent to. Absent when sent to the primary agent. - `type BetaManagedAgentsAgentThreadContextCompactedEvent struct{…}` Indicates that context compaction (summarization) occurred during the session. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThreadContextCompactedEventType` - `const BetaManagedAgentsAgentThreadContextCompactedEventTypeAgentThreadContextCompacted BetaManagedAgentsAgentThreadContextCompactedEventType = "agent.thread_context_compacted"` - `type BetaManagedAgentsSessionErrorEvent struct{…}` An error event indicating a problem occurred during session execution. - `ID string` Unique identifier for this event. - `Error BetaManagedAgentsSessionErrorEventErrorUnion` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `type BetaManagedAgentsUnknownError struct{…}` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsUnknownErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` - `Type BetaManagedAgentsUnknownErrorType` - `const BetaManagedAgentsUnknownErrorTypeUnknownError BetaManagedAgentsUnknownErrorType = "unknown_error"` - `type BetaManagedAgentsModelOverloadedError struct{…}` The model is currently overloaded. Emitted after automatic retries are exhausted. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelOverloadedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelOverloadedErrorType` - `const BetaManagedAgentsModelOverloadedErrorTypeModelOverloadedError BetaManagedAgentsModelOverloadedErrorType = "model_overloaded_error"` - `type BetaManagedAgentsModelRateLimitedError struct{…}` The model request was rate-limited. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRateLimitedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelRateLimitedErrorType` - `const BetaManagedAgentsModelRateLimitedErrorTypeModelRateLimitedError BetaManagedAgentsModelRateLimitedErrorType = "model_rate_limited_error"` - `type BetaManagedAgentsModelRequestFailedError struct{…}` A model request failed for a reason other than overload or rate-limiting. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRequestFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelRequestFailedErrorType` - `const BetaManagedAgentsModelRequestFailedErrorTypeModelRequestFailedError BetaManagedAgentsModelRequestFailedErrorType = "model_request_failed_error"` - `type BetaManagedAgentsMCPConnectionFailedError struct{…}` Failed to connect to an MCP server. - `MCPServerName string` Name of the MCP server that failed to connect. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPConnectionFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsMCPConnectionFailedErrorType` - `const BetaManagedAgentsMCPConnectionFailedErrorTypeMCPConnectionFailedError BetaManagedAgentsMCPConnectionFailedErrorType = "mcp_connection_failed_error"` - `type BetaManagedAgentsMCPAuthenticationFailedError struct{…}` Authentication to an MCP server failed. - `MCPServerName string` Name of the MCP server that failed authentication. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPAuthenticationFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsMCPAuthenticationFailedErrorType` - `const BetaManagedAgentsMCPAuthenticationFailedErrorTypeMCPAuthenticationFailedError BetaManagedAgentsMCPAuthenticationFailedErrorType = "mcp_authentication_failed_error"` - `type BetaManagedAgentsBillingError struct{…}` The caller's organization or workspace cannot make model requests — out of credits or spend limit reached. Retrying with the same credentials will not succeed; the caller must resolve the billing state. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsBillingErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsBillingErrorType` - `const BetaManagedAgentsBillingErrorTypeBillingError BetaManagedAgentsBillingErrorType = "billing_error"` - `type BetaManagedAgentsCredentialHostUnreachableError struct{…}` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `CredentialID string` ID of the affected credential. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsCredentialHostUnreachableErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsCredentialHostUnreachableErrorType` - `const BetaManagedAgentsCredentialHostUnreachableErrorTypeCredentialHostUnreachableError BetaManagedAgentsCredentialHostUnreachableErrorType = "credential_host_unreachable_error"` - `VaultID string` ID of the vault containing the affected credential. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionErrorEventType` - `const BetaManagedAgentsSessionErrorEventTypeSessionError BetaManagedAgentsSessionErrorEventType = "session.error"` - `type BetaManagedAgentsSessionStatusRescheduledEvent struct{…}` Indicates the session is recovering from an error state and is rescheduled for execution. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusRescheduledEventType` - `const BetaManagedAgentsSessionStatusRescheduledEventTypeSessionStatusRescheduled BetaManagedAgentsSessionStatusRescheduledEventType = "session.status_rescheduled"` - `type BetaManagedAgentsSessionStatusRunningEvent struct{…}` Indicates the session is actively running and the agent is working. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusRunningEventType` - `const BetaManagedAgentsSessionStatusRunningEventTypeSessionStatusRunning BetaManagedAgentsSessionStatusRunningEventType = "session.status_running"` - `type BetaManagedAgentsSessionStatusIdleEvent struct{…}` Indicates the agent has paused and is awaiting user input. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `StopReason BetaManagedAgentsSessionStatusIdleEventStopReasonUnion` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `Type BetaManagedAgentsSessionEndTurnType` - `const BetaManagedAgentsSessionEndTurnTypeEndTurn BetaManagedAgentsSessionEndTurnType = "end_turn"` - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `EventIDs []string` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type BetaManagedAgentsSessionRequiresActionType` - `const BetaManagedAgentsSessionRequiresActionTypeRequiresAction BetaManagedAgentsSessionRequiresActionType = "requires_action"` - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionRetriesExhaustedType` - `const BetaManagedAgentsSessionRetriesExhaustedTypeRetriesExhausted BetaManagedAgentsSessionRetriesExhaustedType = "retries_exhausted"` - `Type BetaManagedAgentsSessionStatusIdleEventType` - `const BetaManagedAgentsSessionStatusIdleEventTypeSessionStatusIdle BetaManagedAgentsSessionStatusIdleEventType = "session.status_idle"` - `type BetaManagedAgentsSessionStatusTerminatedEvent struct{…}` Indicates the session has terminated, either due to an error or completion. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusTerminatedEventType` - `const BetaManagedAgentsSessionStatusTerminatedEventTypeSessionStatusTerminated BetaManagedAgentsSessionStatusTerminatedEventType = "session.status_terminated"` - `type BetaManagedAgentsSessionThreadCreatedEvent struct{…}` Emitted when a subagent is spawned as a new thread. Written to the parent thread's output stream so clients observing the session see child creation. - `ID string` Unique identifier for this event. - `AgentName string` Name of the callable agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public `sthr_` ID of the newly created thread. - `Type BetaManagedAgentsSessionThreadCreatedEventType` - `const BetaManagedAgentsSessionThreadCreatedEventTypeSessionThreadCreated BetaManagedAgentsSessionThreadCreatedEventType = "session.thread_created"` - `type BetaManagedAgentsSpanOutcomeEvaluationStartEvent struct{…}` Emitted when an outcome evaluation cycle begins. - `ID string` Unique identifier for this event. - `Iteration int64` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanOutcomeEvaluationStartEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationStartEventTypeSpanOutcomeEvaluationStart BetaManagedAgentsSpanOutcomeEvaluationStartEventType = "span.outcome_evaluation_start"` - `type BetaManagedAgentsSpanOutcomeEvaluationEndEvent struct{…}` Emitted when an outcome evaluation cycle completes. Carries the verdict and aggregate token usage. A verdict of `needs_revision` means another evaluation cycle follows; `satisfied`, `max_iterations_reached`, `failed`, or `interrupted` are terminal — no further evaluation cycles follow. - `ID string` Unique identifier for this event. - `Explanation string` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `Iteration int64` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `OutcomeEvaluationStartID string` The id of the corresponding `span.outcome_evaluation_start` event. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Result string` Evaluation verdict. 'satisfied': criteria met, session goes idle. 'needs_revision': criteria not met, another revision cycle follows. 'max_iterations_reached': evaluation budget exhausted with criteria still unmet — one final acknowledgment turn follows before the session goes idle, but no further evaluation runs. 'failed': grader determined the rubric does not apply to the deliverables. 'interrupted': user sent an interrupt while evaluation was in progress. - `Type BetaManagedAgentsSpanOutcomeEvaluationEndEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationEndEventTypeSpanOutcomeEvaluationEnd BetaManagedAgentsSpanOutcomeEvaluationEndEventType = "span.outcome_evaluation_end"` - `Usage BetaManagedAgentsSpanModelUsage` Token usage for a single model request. - `CacheCreationInputTokens int64` Tokens used to create prompt cache in this request. - `CacheReadInputTokens int64` Tokens read from prompt cache in this request. - `InputTokens int64` Input tokens consumed by this request. - `OutputTokens int64` Output tokens generated by this request. - `Speed BetaManagedAgentsSpanModelUsageSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsSpanModelUsageSpeedStandard BetaManagedAgentsSpanModelUsageSpeed = "standard"` - `const BetaManagedAgentsSpanModelUsageSpeedFast BetaManagedAgentsSpanModelUsageSpeed = "fast"` - `type BetaManagedAgentsSpanModelRequestStartEvent struct{…}` Emitted when a model request is initiated by the agent. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanModelRequestStartEventType` - `const BetaManagedAgentsSpanModelRequestStartEventTypeSpanModelRequestStart BetaManagedAgentsSpanModelRequestStartEventType = "span.model_request_start"` - `type BetaManagedAgentsSpanModelRequestEndEvent struct{…}` Emitted when a model request completes. - `ID string` Unique identifier for this event. - `IsError bool` Whether the model request resulted in an error. - `ModelRequestStartID string` The id of the corresponding `span.model_request_start` event. - `ModelUsage BetaManagedAgentsSpanModelUsage` Token usage for a single model request. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanModelRequestEndEventType` - `const BetaManagedAgentsSpanModelRequestEndEventTypeSpanModelRequestEnd BetaManagedAgentsSpanModelRequestEndEventType = "span.model_request_end"` - `type BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent struct{…}` Periodic heartbeat emitted while an outcome evaluation cycle is in progress. Distinguishes 'evaluation is actively running' from 'evaluation is stuck' between the corresponding `span.outcome_evaluation_start` and `span.outcome_evaluation_end` events. - `ID string` Unique identifier for this event. - `Iteration int64` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanOutcomeEvaluationOngoingEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationOngoingEventTypeSpanOutcomeEvaluationOngoing BetaManagedAgentsSpanOutcomeEvaluationOngoingEventType = "span.outcome_evaluation_ongoing"` - `type BetaManagedAgentsUserDefineOutcomeEvent struct{…}` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `ID string` Unique identifier for this event. - `Description string` What the agent should produce. Copied from the input event. - `MaxIterations int64` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `OutcomeID string` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Rubric BetaManagedAgentsUserDefineOutcomeEventRubricUnion` Rubric for grading the quality of an outcome. - `type BetaManagedAgentsFileRubric struct{…}` Rubric referenced by a file uploaded via the Files API. - `FileID string` ID of the rubric file. - `Type BetaManagedAgentsFileRubricType` - `const BetaManagedAgentsFileRubricTypeFile BetaManagedAgentsFileRubricType = "file"` - `type BetaManagedAgentsTextRubric struct{…}` Rubric content provided inline as text. - `Content string` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type BetaManagedAgentsTextRubricType` - `const BetaManagedAgentsTextRubricTypeText BetaManagedAgentsTextRubricType = "text"` - `Type BetaManagedAgentsUserDefineOutcomeEventType` - `const BetaManagedAgentsUserDefineOutcomeEventTypeUserDefineOutcome BetaManagedAgentsUserDefineOutcomeEventType = "user.define_outcome"` - `type BetaManagedAgentsSessionDeletedEvent struct{…}` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionDeletedEventType` - `const BetaManagedAgentsSessionDeletedEventTypeSessionDeleted BetaManagedAgentsSessionDeletedEventType = "session.deleted"` - `type BetaManagedAgentsSessionThreadStatusRunningEvent struct{…}` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that started running. - `Type BetaManagedAgentsSessionThreadStatusRunningEventType` - `const BetaManagedAgentsSessionThreadStatusRunningEventTypeSessionThreadStatusRunning BetaManagedAgentsSessionThreadStatusRunningEventType = "session.thread_status_running"` - `type BetaManagedAgentsSessionThreadStatusIdleEvent struct{…}` A session thread has yielded and is awaiting input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that went idle. - `StopReason BetaManagedAgentsSessionThreadStatusIdleEventStopReasonUnion` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionThreadStatusIdleEventType` - `const BetaManagedAgentsSessionThreadStatusIdleEventTypeSessionThreadStatusIdle BetaManagedAgentsSessionThreadStatusIdleEventType = "session.thread_status_idle"` - `type BetaManagedAgentsSessionThreadStatusTerminatedEvent struct{…}` A session thread has terminated and will accept no further input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that terminated. - `Type BetaManagedAgentsSessionThreadStatusTerminatedEventType` - `const BetaManagedAgentsSessionThreadStatusTerminatedEventTypeSessionThreadStatusTerminated BetaManagedAgentsSessionThreadStatusTerminatedEventType = "session.thread_status_terminated"` - `type BetaManagedAgentsUserToolResultEvent struct{…}` Event sent by the client providing the result of an agent-toolset tool execution. Only valid on `self_hosted` environments, where sandbox-routed tools are executed by the client rather than the server. - `ID string` Unique identifier for this event. - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolResultEventType` - `const BetaManagedAgentsUserToolResultEventTypeUserToolResult BetaManagedAgentsUserToolResultEventType = "user.tool_result"` - `Content []BetaManagedAgentsUserToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `type BetaManagedAgentsSessionThreadStatusRescheduledEvent struct{…}` A session thread hit a transient error and is retrying automatically. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that is retrying. - `Type BetaManagedAgentsSessionThreadStatusRescheduledEventType` - `const BetaManagedAgentsSessionThreadStatusRescheduledEventTypeSessionThreadStatusRescheduled BetaManagedAgentsSessionThreadStatusRescheduledEventType = "session.thread_status_rescheduled"` - `type BetaManagedAgentsSessionUpdatedEvent struct{…}` Emitted when an UpdateSession request changed at least one field. Carries only the fields that changed; absent fields were not part of the update. The new configuration applies from the next turn. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionUpdatedEventType` - `const BetaManagedAgentsSessionUpdatedEventTypeSessionUpdated BetaManagedAgentsSessionUpdatedEventType = "session.updated"` - `Agent BetaManagedAgentsSessionAgent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Multiagent BetaManagedAgentsSessionMultiagentCoordinator` Resolved coordinator topology with full agent definitions for each roster member. - `Agents []BetaManagedAgentsSessionThreadAgent` Full `agent` definitions the coordinator may spawn as session threads. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `Type BetaManagedAgentsSessionMultiagentCoordinatorType` - `const BetaManagedAgentsSessionMultiagentCoordinatorTypeCoordinator BetaManagedAgentsSessionMultiagentCoordinatorType = "coordinator"` - `Name string` - `Skills []BetaManagedAgentsSessionAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `System string` - `Tools []BetaManagedAgentsSessionAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `type BetaManagedAgentsMCPToolset struct{…}` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Type BetaManagedAgentsSessionAgentType` - `const BetaManagedAgentsSessionAgentTypeAgent BetaManagedAgentsSessionAgentType = "agent"` - `Version int64` - `Metadata map[string, string]` The session's full metadata bag after the update. Present when the update set non-empty metadata; absent when metadata was unchanged or cleared to empty. - `Title string` The session's new title. Present only when the update changed it. - `type BetaManagedAgentsSystemMessageEvent struct{…}` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsSystemContentBlock` System content blocks. Text-only. - `Text string` The text content. - `Type BetaManagedAgentsSystemContentBlockType` - `const BetaManagedAgentsSystemContentBlockTypeText BetaManagedAgentsSystemContentBlockType = "text"` - `Type BetaManagedAgentsSystemMessageEventType` - `const BetaManagedAgentsSystemMessageEventTypeSystemMessage BetaManagedAgentsSystemMessageEventType = "system.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format ### Beta Managed Agents Session Requires Action - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `EventIDs []string` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type BetaManagedAgentsSessionRequiresActionType` - `const BetaManagedAgentsSessionRequiresActionTypeRequiresAction BetaManagedAgentsSessionRequiresActionType = "requires_action"` ### Beta Managed Agents Session Retries Exhausted - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionRetriesExhaustedType` - `const BetaManagedAgentsSessionRetriesExhaustedTypeRetriesExhausted BetaManagedAgentsSessionRetriesExhaustedType = "retries_exhausted"` ### Beta Managed Agents Session Status Idle Event - `type BetaManagedAgentsSessionStatusIdleEvent struct{…}` Indicates the agent has paused and is awaiting user input. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `StopReason BetaManagedAgentsSessionStatusIdleEventStopReasonUnion` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `Type BetaManagedAgentsSessionEndTurnType` - `const BetaManagedAgentsSessionEndTurnTypeEndTurn BetaManagedAgentsSessionEndTurnType = "end_turn"` - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `EventIDs []string` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type BetaManagedAgentsSessionRequiresActionType` - `const BetaManagedAgentsSessionRequiresActionTypeRequiresAction BetaManagedAgentsSessionRequiresActionType = "requires_action"` - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionRetriesExhaustedType` - `const BetaManagedAgentsSessionRetriesExhaustedTypeRetriesExhausted BetaManagedAgentsSessionRetriesExhaustedType = "retries_exhausted"` - `Type BetaManagedAgentsSessionStatusIdleEventType` - `const BetaManagedAgentsSessionStatusIdleEventTypeSessionStatusIdle BetaManagedAgentsSessionStatusIdleEventType = "session.status_idle"` ### Beta Managed Agents Session Status Rescheduled Event - `type BetaManagedAgentsSessionStatusRescheduledEvent struct{…}` Indicates the session is recovering from an error state and is rescheduled for execution. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusRescheduledEventType` - `const BetaManagedAgentsSessionStatusRescheduledEventTypeSessionStatusRescheduled BetaManagedAgentsSessionStatusRescheduledEventType = "session.status_rescheduled"` ### Beta Managed Agents Session Status Running Event - `type BetaManagedAgentsSessionStatusRunningEvent struct{…}` Indicates the session is actively running and the agent is working. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusRunningEventType` - `const BetaManagedAgentsSessionStatusRunningEventTypeSessionStatusRunning BetaManagedAgentsSessionStatusRunningEventType = "session.status_running"` ### Beta Managed Agents Session Status Terminated Event - `type BetaManagedAgentsSessionStatusTerminatedEvent struct{…}` Indicates the session has terminated, either due to an error or completion. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusTerminatedEventType` - `const BetaManagedAgentsSessionStatusTerminatedEventTypeSessionStatusTerminated BetaManagedAgentsSessionStatusTerminatedEventType = "session.status_terminated"` ### Beta Managed Agents Session Thread Created Event - `type BetaManagedAgentsSessionThreadCreatedEvent struct{…}` Emitted when a subagent is spawned as a new thread. Written to the parent thread's output stream so clients observing the session see child creation. - `ID string` Unique identifier for this event. - `AgentName string` Name of the callable agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public `sthr_` ID of the newly created thread. - `Type BetaManagedAgentsSessionThreadCreatedEventType` - `const BetaManagedAgentsSessionThreadCreatedEventTypeSessionThreadCreated BetaManagedAgentsSessionThreadCreatedEventType = "session.thread_created"` ### Beta Managed Agents Session Thread Status Idle Event - `type BetaManagedAgentsSessionThreadStatusIdleEvent struct{…}` A session thread has yielded and is awaiting input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that went idle. - `StopReason BetaManagedAgentsSessionThreadStatusIdleEventStopReasonUnion` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `Type BetaManagedAgentsSessionEndTurnType` - `const BetaManagedAgentsSessionEndTurnTypeEndTurn BetaManagedAgentsSessionEndTurnType = "end_turn"` - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `EventIDs []string` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type BetaManagedAgentsSessionRequiresActionType` - `const BetaManagedAgentsSessionRequiresActionTypeRequiresAction BetaManagedAgentsSessionRequiresActionType = "requires_action"` - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionRetriesExhaustedType` - `const BetaManagedAgentsSessionRetriesExhaustedTypeRetriesExhausted BetaManagedAgentsSessionRetriesExhaustedType = "retries_exhausted"` - `Type BetaManagedAgentsSessionThreadStatusIdleEventType` - `const BetaManagedAgentsSessionThreadStatusIdleEventTypeSessionThreadStatusIdle BetaManagedAgentsSessionThreadStatusIdleEventType = "session.thread_status_idle"` ### Beta Managed Agents Session Thread Status Rescheduled Event - `type BetaManagedAgentsSessionThreadStatusRescheduledEvent struct{…}` A session thread hit a transient error and is retrying automatically. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that is retrying. - `Type BetaManagedAgentsSessionThreadStatusRescheduledEventType` - `const BetaManagedAgentsSessionThreadStatusRescheduledEventTypeSessionThreadStatusRescheduled BetaManagedAgentsSessionThreadStatusRescheduledEventType = "session.thread_status_rescheduled"` ### Beta Managed Agents Session Thread Status Running Event - `type BetaManagedAgentsSessionThreadStatusRunningEvent struct{…}` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that started running. - `Type BetaManagedAgentsSessionThreadStatusRunningEventType` - `const BetaManagedAgentsSessionThreadStatusRunningEventTypeSessionThreadStatusRunning BetaManagedAgentsSessionThreadStatusRunningEventType = "session.thread_status_running"` ### Beta Managed Agents Session Thread Status Terminated Event - `type BetaManagedAgentsSessionThreadStatusTerminatedEvent struct{…}` A session thread has terminated and will accept no further input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that terminated. - `Type BetaManagedAgentsSessionThreadStatusTerminatedEventType` - `const BetaManagedAgentsSessionThreadStatusTerminatedEventTypeSessionThreadStatusTerminated BetaManagedAgentsSessionThreadStatusTerminatedEventType = "session.thread_status_terminated"` ### Beta Managed Agents Span Model Request End Event - `type BetaManagedAgentsSpanModelRequestEndEvent struct{…}` Emitted when a model request completes. - `ID string` Unique identifier for this event. - `IsError bool` Whether the model request resulted in an error. - `ModelRequestStartID string` The id of the corresponding `span.model_request_start` event. - `ModelUsage BetaManagedAgentsSpanModelUsage` Token usage for a single model request. - `CacheCreationInputTokens int64` Tokens used to create prompt cache in this request. - `CacheReadInputTokens int64` Tokens read from prompt cache in this request. - `InputTokens int64` Input tokens consumed by this request. - `OutputTokens int64` Output tokens generated by this request. - `Speed BetaManagedAgentsSpanModelUsageSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsSpanModelUsageSpeedStandard BetaManagedAgentsSpanModelUsageSpeed = "standard"` - `const BetaManagedAgentsSpanModelUsageSpeedFast BetaManagedAgentsSpanModelUsageSpeed = "fast"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanModelRequestEndEventType` - `const BetaManagedAgentsSpanModelRequestEndEventTypeSpanModelRequestEnd BetaManagedAgentsSpanModelRequestEndEventType = "span.model_request_end"` ### Beta Managed Agents Span Model Request Start Event - `type BetaManagedAgentsSpanModelRequestStartEvent struct{…}` Emitted when a model request is initiated by the agent. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanModelRequestStartEventType` - `const BetaManagedAgentsSpanModelRequestStartEventTypeSpanModelRequestStart BetaManagedAgentsSpanModelRequestStartEventType = "span.model_request_start"` ### Beta Managed Agents Span Model Usage - `type BetaManagedAgentsSpanModelUsage struct{…}` Token usage for a single model request. - `CacheCreationInputTokens int64` Tokens used to create prompt cache in this request. - `CacheReadInputTokens int64` Tokens read from prompt cache in this request. - `InputTokens int64` Input tokens consumed by this request. - `OutputTokens int64` Output tokens generated by this request. - `Speed BetaManagedAgentsSpanModelUsageSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsSpanModelUsageSpeedStandard BetaManagedAgentsSpanModelUsageSpeed = "standard"` - `const BetaManagedAgentsSpanModelUsageSpeedFast BetaManagedAgentsSpanModelUsageSpeed = "fast"` ### Beta Managed Agents Span Outcome Evaluation End Event - `type BetaManagedAgentsSpanOutcomeEvaluationEndEvent struct{…}` Emitted when an outcome evaluation cycle completes. Carries the verdict and aggregate token usage. A verdict of `needs_revision` means another evaluation cycle follows; `satisfied`, `max_iterations_reached`, `failed`, or `interrupted` are terminal — no further evaluation cycles follow. - `ID string` Unique identifier for this event. - `Explanation string` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `Iteration int64` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `OutcomeEvaluationStartID string` The id of the corresponding `span.outcome_evaluation_start` event. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Result string` Evaluation verdict. 'satisfied': criteria met, session goes idle. 'needs_revision': criteria not met, another revision cycle follows. 'max_iterations_reached': evaluation budget exhausted with criteria still unmet — one final acknowledgment turn follows before the session goes idle, but no further evaluation runs. 'failed': grader determined the rubric does not apply to the deliverables. 'interrupted': user sent an interrupt while evaluation was in progress. - `Type BetaManagedAgentsSpanOutcomeEvaluationEndEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationEndEventTypeSpanOutcomeEvaluationEnd BetaManagedAgentsSpanOutcomeEvaluationEndEventType = "span.outcome_evaluation_end"` - `Usage BetaManagedAgentsSpanModelUsage` Token usage for a single model request. - `CacheCreationInputTokens int64` Tokens used to create prompt cache in this request. - `CacheReadInputTokens int64` Tokens read from prompt cache in this request. - `InputTokens int64` Input tokens consumed by this request. - `OutputTokens int64` Output tokens generated by this request. - `Speed BetaManagedAgentsSpanModelUsageSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsSpanModelUsageSpeedStandard BetaManagedAgentsSpanModelUsageSpeed = "standard"` - `const BetaManagedAgentsSpanModelUsageSpeedFast BetaManagedAgentsSpanModelUsageSpeed = "fast"` ### Beta Managed Agents Span Outcome Evaluation Ongoing Event - `type BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent struct{…}` Periodic heartbeat emitted while an outcome evaluation cycle is in progress. Distinguishes 'evaluation is actively running' from 'evaluation is stuck' between the corresponding `span.outcome_evaluation_start` and `span.outcome_evaluation_end` events. - `ID string` Unique identifier for this event. - `Iteration int64` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanOutcomeEvaluationOngoingEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationOngoingEventTypeSpanOutcomeEvaluationOngoing BetaManagedAgentsSpanOutcomeEvaluationOngoingEventType = "span.outcome_evaluation_ongoing"` ### Beta Managed Agents Span Outcome Evaluation Start Event - `type BetaManagedAgentsSpanOutcomeEvaluationStartEvent struct{…}` Emitted when an outcome evaluation cycle begins. - `ID string` Unique identifier for this event. - `Iteration int64` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanOutcomeEvaluationStartEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationStartEventTypeSpanOutcomeEvaluationStart BetaManagedAgentsSpanOutcomeEvaluationStartEventType = "span.outcome_evaluation_start"` ### Beta Managed Agents Stream Session Events - `type BetaManagedAgentsStreamSessionEventsUnion interface{…}` Server-sent event in the session stream. - `type BetaManagedAgentsUserMessageEvent struct{…}` A user message event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsUserMessageEventContentUnion` Array of content blocks comprising the user message. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `Type BetaManagedAgentsUserMessageEventType` - `const BetaManagedAgentsUserMessageEventTypeUserMessage BetaManagedAgentsUserMessageEventType = "user.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsUserInterruptEvent struct{…}` An interrupt event that pauses agent execution and returns control to the user. - `ID string` Unique identifier for this event. - `Type BetaManagedAgentsUserInterruptEventType` - `const BetaManagedAgentsUserInterruptEventTypeUserInterrupt BetaManagedAgentsUserInterruptEventType = "user.interrupt"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` If absent, interrupts every non-archived thread in a multiagent session (or the primary alone in a single-agent session). If present, interrupts only the named thread. - `type BetaManagedAgentsUserToolConfirmationEvent struct{…}` A tool confirmation event that approves or denies a pending tool execution. - `ID string` Unique identifier for this event. - `Result BetaManagedAgentsUserToolConfirmationEventResult` UserToolConfirmationResult enum - `const BetaManagedAgentsUserToolConfirmationEventResultAllow BetaManagedAgentsUserToolConfirmationEventResult = "allow"` - `const BetaManagedAgentsUserToolConfirmationEventResultDeny BetaManagedAgentsUserToolConfirmationEventResult = "deny"` - `ToolUseID string` The id of the `agent.tool_use` or `agent.mcp_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolConfirmationEventType` - `const BetaManagedAgentsUserToolConfirmationEventTypeUserToolConfirmation BetaManagedAgentsUserToolConfirmationEventType = "user.tool_confirmation"` - `DenyMessage string` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` When set, the confirmation routes to this subagent's thread rather than the primary. Echo this from the `session_thread_id` on the `agent.tool_use` or `agent.mcp_tool_use` event that prompted the approval. - `type BetaManagedAgentsUserCustomToolResultEvent struct{…}` Event sent by the client providing the result of a custom tool execution. - `ID string` Unique identifier for this event. - `CustomToolUseID string` The id of the `agent.custom_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserCustomToolResultEventType` - `const BetaManagedAgentsUserCustomToolResultEventTypeUserCustomToolResult BetaManagedAgentsUserCustomToolResultEventType = "user.custom_tool_result"` - `Content []BetaManagedAgentsUserCustomToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `type BetaManagedAgentsAgentCustomToolUseEvent struct{…}` Event emitted when the agent calls a custom tool. The session goes idle until the client sends a `user.custom_tool_result` event with the result. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `Name string` Name of the custom tool being called. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentCustomToolUseEventType` - `const BetaManagedAgentsAgentCustomToolUseEventTypeAgentCustomToolUse BetaManagedAgentsAgentCustomToolUseEventType = "agent.custom_tool_use"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its custom tool use on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.custom_tool_result` event to route the result back. - `type BetaManagedAgentsAgentMessageEvent struct{…}` An agent response event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsTextBlock` Array of text blocks comprising the agent response. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMessageEventType` - `const BetaManagedAgentsAgentMessageEventTypeAgentMessage BetaManagedAgentsAgentMessageEventType = "agent.message"` - `type BetaManagedAgentsAgentThinkingEvent struct{…}` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThinkingEventType` - `const BetaManagedAgentsAgentThinkingEventTypeAgentThinking BetaManagedAgentsAgentThinkingEventType = "agent.thinking"` - `type BetaManagedAgentsAgentMCPToolUseEvent struct{…}` Event emitted when the agent invokes a tool provided by an MCP server. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `MCPServerName string` Name of the MCP server providing the tool. - `Name string` Name of the MCP tool being used. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMCPToolUseEventType` - `const BetaManagedAgentsAgentMCPToolUseEventTypeAgentMCPToolUse BetaManagedAgentsAgentMCPToolUseEventType = "agent.mcp_tool_use"` - `EvaluatedPermission BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission` AgentEvaluatedPermission enum - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionAllow BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "allow"` - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionAsk BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "ask"` - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionDeny BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "deny"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.tool_confirmation` event to route the approval back. - `type BetaManagedAgentsAgentMCPToolResultEvent struct{…}` Event representing the result of an MCP tool execution. - `ID string` Unique identifier for this event. - `MCPToolUseID string` The id of the `agent.mcp_tool_use` event this result corresponds to. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMCPToolResultEventType` - `const BetaManagedAgentsAgentMCPToolResultEventTypeAgentMCPToolResult BetaManagedAgentsAgentMCPToolResultEventType = "agent.mcp_tool_result"` - `Content []BetaManagedAgentsAgentMCPToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsAgentToolUseEvent struct{…}` Event emitted when the agent invokes a built-in agent tool. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `Name string` Name of the agent tool being used. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentToolUseEventType` - `const BetaManagedAgentsAgentToolUseEventTypeAgentToolUse BetaManagedAgentsAgentToolUseEventType = "agent.tool_use"` - `EvaluatedPermission BetaManagedAgentsAgentToolUseEventEvaluatedPermission` AgentEvaluatedPermission enum - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionAllow BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "allow"` - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionAsk BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "ask"` - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionDeny BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "deny"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.tool_confirmation` event to route the approval back. - `type BetaManagedAgentsAgentToolResultEvent struct{…}` Event representing the result of an agent tool execution. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to. - `Type BetaManagedAgentsAgentToolResultEventType` - `const BetaManagedAgentsAgentToolResultEventTypeAgentToolResult BetaManagedAgentsAgentToolResultEventType = "agent.tool_result"` - `Content []BetaManagedAgentsAgentToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsAgentThreadMessageReceivedEvent struct{…}` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsAgentThreadMessageReceivedEventContentUnion` Message content blocks. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `FromSessionThreadID string` Public `sthr_` ID of the thread that sent the message. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThreadMessageReceivedEventType` - `const BetaManagedAgentsAgentThreadMessageReceivedEventTypeAgentThreadMessageReceived BetaManagedAgentsAgentThreadMessageReceivedEventType = "agent.thread_message_received"` - `FromAgentName string` Name of the callable agent this message came from. Absent when received from the primary agent. - `type BetaManagedAgentsAgentThreadMessageSentEvent struct{…}` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsAgentThreadMessageSentEventContentUnion` Message content blocks. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `ProcessedAt Time` A timestamp in RFC 3339 format - `ToSessionThreadID string` Public `sthr_` ID of the thread the message was sent to. - `Type BetaManagedAgentsAgentThreadMessageSentEventType` - `const BetaManagedAgentsAgentThreadMessageSentEventTypeAgentThreadMessageSent BetaManagedAgentsAgentThreadMessageSentEventType = "agent.thread_message_sent"` - `ToAgentName string` Name of the callable agent this message was sent to. Absent when sent to the primary agent. - `type BetaManagedAgentsAgentThreadContextCompactedEvent struct{…}` Indicates that context compaction (summarization) occurred during the session. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThreadContextCompactedEventType` - `const BetaManagedAgentsAgentThreadContextCompactedEventTypeAgentThreadContextCompacted BetaManagedAgentsAgentThreadContextCompactedEventType = "agent.thread_context_compacted"` - `type BetaManagedAgentsSessionErrorEvent struct{…}` An error event indicating a problem occurred during session execution. - `ID string` Unique identifier for this event. - `Error BetaManagedAgentsSessionErrorEventErrorUnion` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `type BetaManagedAgentsUnknownError struct{…}` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsUnknownErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` - `Type BetaManagedAgentsUnknownErrorType` - `const BetaManagedAgentsUnknownErrorTypeUnknownError BetaManagedAgentsUnknownErrorType = "unknown_error"` - `type BetaManagedAgentsModelOverloadedError struct{…}` The model is currently overloaded. Emitted after automatic retries are exhausted. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelOverloadedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelOverloadedErrorType` - `const BetaManagedAgentsModelOverloadedErrorTypeModelOverloadedError BetaManagedAgentsModelOverloadedErrorType = "model_overloaded_error"` - `type BetaManagedAgentsModelRateLimitedError struct{…}` The model request was rate-limited. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRateLimitedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelRateLimitedErrorType` - `const BetaManagedAgentsModelRateLimitedErrorTypeModelRateLimitedError BetaManagedAgentsModelRateLimitedErrorType = "model_rate_limited_error"` - `type BetaManagedAgentsModelRequestFailedError struct{…}` A model request failed for a reason other than overload or rate-limiting. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRequestFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelRequestFailedErrorType` - `const BetaManagedAgentsModelRequestFailedErrorTypeModelRequestFailedError BetaManagedAgentsModelRequestFailedErrorType = "model_request_failed_error"` - `type BetaManagedAgentsMCPConnectionFailedError struct{…}` Failed to connect to an MCP server. - `MCPServerName string` Name of the MCP server that failed to connect. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPConnectionFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsMCPConnectionFailedErrorType` - `const BetaManagedAgentsMCPConnectionFailedErrorTypeMCPConnectionFailedError BetaManagedAgentsMCPConnectionFailedErrorType = "mcp_connection_failed_error"` - `type BetaManagedAgentsMCPAuthenticationFailedError struct{…}` Authentication to an MCP server failed. - `MCPServerName string` Name of the MCP server that failed authentication. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPAuthenticationFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsMCPAuthenticationFailedErrorType` - `const BetaManagedAgentsMCPAuthenticationFailedErrorTypeMCPAuthenticationFailedError BetaManagedAgentsMCPAuthenticationFailedErrorType = "mcp_authentication_failed_error"` - `type BetaManagedAgentsBillingError struct{…}` The caller's organization or workspace cannot make model requests — out of credits or spend limit reached. Retrying with the same credentials will not succeed; the caller must resolve the billing state. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsBillingErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsBillingErrorType` - `const BetaManagedAgentsBillingErrorTypeBillingError BetaManagedAgentsBillingErrorType = "billing_error"` - `type BetaManagedAgentsCredentialHostUnreachableError struct{…}` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `CredentialID string` ID of the affected credential. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsCredentialHostUnreachableErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsCredentialHostUnreachableErrorType` - `const BetaManagedAgentsCredentialHostUnreachableErrorTypeCredentialHostUnreachableError BetaManagedAgentsCredentialHostUnreachableErrorType = "credential_host_unreachable_error"` - `VaultID string` ID of the vault containing the affected credential. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionErrorEventType` - `const BetaManagedAgentsSessionErrorEventTypeSessionError BetaManagedAgentsSessionErrorEventType = "session.error"` - `type BetaManagedAgentsSessionStatusRescheduledEvent struct{…}` Indicates the session is recovering from an error state and is rescheduled for execution. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusRescheduledEventType` - `const BetaManagedAgentsSessionStatusRescheduledEventTypeSessionStatusRescheduled BetaManagedAgentsSessionStatusRescheduledEventType = "session.status_rescheduled"` - `type BetaManagedAgentsSessionStatusRunningEvent struct{…}` Indicates the session is actively running and the agent is working. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusRunningEventType` - `const BetaManagedAgentsSessionStatusRunningEventTypeSessionStatusRunning BetaManagedAgentsSessionStatusRunningEventType = "session.status_running"` - `type BetaManagedAgentsSessionStatusIdleEvent struct{…}` Indicates the agent has paused and is awaiting user input. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `StopReason BetaManagedAgentsSessionStatusIdleEventStopReasonUnion` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `Type BetaManagedAgentsSessionEndTurnType` - `const BetaManagedAgentsSessionEndTurnTypeEndTurn BetaManagedAgentsSessionEndTurnType = "end_turn"` - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `EventIDs []string` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type BetaManagedAgentsSessionRequiresActionType` - `const BetaManagedAgentsSessionRequiresActionTypeRequiresAction BetaManagedAgentsSessionRequiresActionType = "requires_action"` - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionRetriesExhaustedType` - `const BetaManagedAgentsSessionRetriesExhaustedTypeRetriesExhausted BetaManagedAgentsSessionRetriesExhaustedType = "retries_exhausted"` - `Type BetaManagedAgentsSessionStatusIdleEventType` - `const BetaManagedAgentsSessionStatusIdleEventTypeSessionStatusIdle BetaManagedAgentsSessionStatusIdleEventType = "session.status_idle"` - `type BetaManagedAgentsSessionStatusTerminatedEvent struct{…}` Indicates the session has terminated, either due to an error or completion. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusTerminatedEventType` - `const BetaManagedAgentsSessionStatusTerminatedEventTypeSessionStatusTerminated BetaManagedAgentsSessionStatusTerminatedEventType = "session.status_terminated"` - `type BetaManagedAgentsSessionThreadCreatedEvent struct{…}` Emitted when a subagent is spawned as a new thread. Written to the parent thread's output stream so clients observing the session see child creation. - `ID string` Unique identifier for this event. - `AgentName string` Name of the callable agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public `sthr_` ID of the newly created thread. - `Type BetaManagedAgentsSessionThreadCreatedEventType` - `const BetaManagedAgentsSessionThreadCreatedEventTypeSessionThreadCreated BetaManagedAgentsSessionThreadCreatedEventType = "session.thread_created"` - `type BetaManagedAgentsSpanOutcomeEvaluationStartEvent struct{…}` Emitted when an outcome evaluation cycle begins. - `ID string` Unique identifier for this event. - `Iteration int64` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanOutcomeEvaluationStartEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationStartEventTypeSpanOutcomeEvaluationStart BetaManagedAgentsSpanOutcomeEvaluationStartEventType = "span.outcome_evaluation_start"` - `type BetaManagedAgentsSpanOutcomeEvaluationEndEvent struct{…}` Emitted when an outcome evaluation cycle completes. Carries the verdict and aggregate token usage. A verdict of `needs_revision` means another evaluation cycle follows; `satisfied`, `max_iterations_reached`, `failed`, or `interrupted` are terminal — no further evaluation cycles follow. - `ID string` Unique identifier for this event. - `Explanation string` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `Iteration int64` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `OutcomeEvaluationStartID string` The id of the corresponding `span.outcome_evaluation_start` event. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Result string` Evaluation verdict. 'satisfied': criteria met, session goes idle. 'needs_revision': criteria not met, another revision cycle follows. 'max_iterations_reached': evaluation budget exhausted with criteria still unmet — one final acknowledgment turn follows before the session goes idle, but no further evaluation runs. 'failed': grader determined the rubric does not apply to the deliverables. 'interrupted': user sent an interrupt while evaluation was in progress. - `Type BetaManagedAgentsSpanOutcomeEvaluationEndEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationEndEventTypeSpanOutcomeEvaluationEnd BetaManagedAgentsSpanOutcomeEvaluationEndEventType = "span.outcome_evaluation_end"` - `Usage BetaManagedAgentsSpanModelUsage` Token usage for a single model request. - `CacheCreationInputTokens int64` Tokens used to create prompt cache in this request. - `CacheReadInputTokens int64` Tokens read from prompt cache in this request. - `InputTokens int64` Input tokens consumed by this request. - `OutputTokens int64` Output tokens generated by this request. - `Speed BetaManagedAgentsSpanModelUsageSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsSpanModelUsageSpeedStandard BetaManagedAgentsSpanModelUsageSpeed = "standard"` - `const BetaManagedAgentsSpanModelUsageSpeedFast BetaManagedAgentsSpanModelUsageSpeed = "fast"` - `type BetaManagedAgentsSpanModelRequestStartEvent struct{…}` Emitted when a model request is initiated by the agent. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanModelRequestStartEventType` - `const BetaManagedAgentsSpanModelRequestStartEventTypeSpanModelRequestStart BetaManagedAgentsSpanModelRequestStartEventType = "span.model_request_start"` - `type BetaManagedAgentsSpanModelRequestEndEvent struct{…}` Emitted when a model request completes. - `ID string` Unique identifier for this event. - `IsError bool` Whether the model request resulted in an error. - `ModelRequestStartID string` The id of the corresponding `span.model_request_start` event. - `ModelUsage BetaManagedAgentsSpanModelUsage` Token usage for a single model request. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanModelRequestEndEventType` - `const BetaManagedAgentsSpanModelRequestEndEventTypeSpanModelRequestEnd BetaManagedAgentsSpanModelRequestEndEventType = "span.model_request_end"` - `type BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent struct{…}` Periodic heartbeat emitted while an outcome evaluation cycle is in progress. Distinguishes 'evaluation is actively running' from 'evaluation is stuck' between the corresponding `span.outcome_evaluation_start` and `span.outcome_evaluation_end` events. - `ID string` Unique identifier for this event. - `Iteration int64` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanOutcomeEvaluationOngoingEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationOngoingEventTypeSpanOutcomeEvaluationOngoing BetaManagedAgentsSpanOutcomeEvaluationOngoingEventType = "span.outcome_evaluation_ongoing"` - `type BetaManagedAgentsUserDefineOutcomeEvent struct{…}` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `ID string` Unique identifier for this event. - `Description string` What the agent should produce. Copied from the input event. - `MaxIterations int64` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `OutcomeID string` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Rubric BetaManagedAgentsUserDefineOutcomeEventRubricUnion` Rubric for grading the quality of an outcome. - `type BetaManagedAgentsFileRubric struct{…}` Rubric referenced by a file uploaded via the Files API. - `FileID string` ID of the rubric file. - `Type BetaManagedAgentsFileRubricType` - `const BetaManagedAgentsFileRubricTypeFile BetaManagedAgentsFileRubricType = "file"` - `type BetaManagedAgentsTextRubric struct{…}` Rubric content provided inline as text. - `Content string` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type BetaManagedAgentsTextRubricType` - `const BetaManagedAgentsTextRubricTypeText BetaManagedAgentsTextRubricType = "text"` - `Type BetaManagedAgentsUserDefineOutcomeEventType` - `const BetaManagedAgentsUserDefineOutcomeEventTypeUserDefineOutcome BetaManagedAgentsUserDefineOutcomeEventType = "user.define_outcome"` - `type BetaManagedAgentsSessionDeletedEvent struct{…}` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionDeletedEventType` - `const BetaManagedAgentsSessionDeletedEventTypeSessionDeleted BetaManagedAgentsSessionDeletedEventType = "session.deleted"` - `type BetaManagedAgentsSessionThreadStatusRunningEvent struct{…}` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that started running. - `Type BetaManagedAgentsSessionThreadStatusRunningEventType` - `const BetaManagedAgentsSessionThreadStatusRunningEventTypeSessionThreadStatusRunning BetaManagedAgentsSessionThreadStatusRunningEventType = "session.thread_status_running"` - `type BetaManagedAgentsSessionThreadStatusIdleEvent struct{…}` A session thread has yielded and is awaiting input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that went idle. - `StopReason BetaManagedAgentsSessionThreadStatusIdleEventStopReasonUnion` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionThreadStatusIdleEventType` - `const BetaManagedAgentsSessionThreadStatusIdleEventTypeSessionThreadStatusIdle BetaManagedAgentsSessionThreadStatusIdleEventType = "session.thread_status_idle"` - `type BetaManagedAgentsSessionThreadStatusTerminatedEvent struct{…}` A session thread has terminated and will accept no further input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that terminated. - `Type BetaManagedAgentsSessionThreadStatusTerminatedEventType` - `const BetaManagedAgentsSessionThreadStatusTerminatedEventTypeSessionThreadStatusTerminated BetaManagedAgentsSessionThreadStatusTerminatedEventType = "session.thread_status_terminated"` - `type BetaManagedAgentsUserToolResultEvent struct{…}` Event sent by the client providing the result of an agent-toolset tool execution. Only valid on `self_hosted` environments, where sandbox-routed tools are executed by the client rather than the server. - `ID string` Unique identifier for this event. - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolResultEventType` - `const BetaManagedAgentsUserToolResultEventTypeUserToolResult BetaManagedAgentsUserToolResultEventType = "user.tool_result"` - `Content []BetaManagedAgentsUserToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `type BetaManagedAgentsSessionThreadStatusRescheduledEvent struct{…}` A session thread hit a transient error and is retrying automatically. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that is retrying. - `Type BetaManagedAgentsSessionThreadStatusRescheduledEventType` - `const BetaManagedAgentsSessionThreadStatusRescheduledEventTypeSessionThreadStatusRescheduled BetaManagedAgentsSessionThreadStatusRescheduledEventType = "session.thread_status_rescheduled"` - `type BetaManagedAgentsSessionUpdatedEvent struct{…}` Emitted when an UpdateSession request changed at least one field. Carries only the fields that changed; absent fields were not part of the update. The new configuration applies from the next turn. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionUpdatedEventType` - `const BetaManagedAgentsSessionUpdatedEventTypeSessionUpdated BetaManagedAgentsSessionUpdatedEventType = "session.updated"` - `Agent BetaManagedAgentsSessionAgent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Multiagent BetaManagedAgentsSessionMultiagentCoordinator` Resolved coordinator topology with full agent definitions for each roster member. - `Agents []BetaManagedAgentsSessionThreadAgent` Full `agent` definitions the coordinator may spawn as session threads. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `Type BetaManagedAgentsSessionMultiagentCoordinatorType` - `const BetaManagedAgentsSessionMultiagentCoordinatorTypeCoordinator BetaManagedAgentsSessionMultiagentCoordinatorType = "coordinator"` - `Name string` - `Skills []BetaManagedAgentsSessionAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `System string` - `Tools []BetaManagedAgentsSessionAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `type BetaManagedAgentsMCPToolset struct{…}` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Type BetaManagedAgentsSessionAgentType` - `const BetaManagedAgentsSessionAgentTypeAgent BetaManagedAgentsSessionAgentType = "agent"` - `Version int64` - `Metadata map[string, string]` The session's full metadata bag after the update. Present when the update set non-empty metadata; absent when metadata was unchanged or cleared to empty. - `Title string` The session's new title. Present only when the update changed it. - `type BetaManagedAgentsSystemMessageEvent struct{…}` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsSystemContentBlock` System content blocks. Text-only. - `Text string` The text content. - `Type BetaManagedAgentsSystemContentBlockType` - `const BetaManagedAgentsSystemContentBlockTypeText BetaManagedAgentsSystemContentBlockType = "text"` - `Type BetaManagedAgentsSystemMessageEventType` - `const BetaManagedAgentsSystemMessageEventTypeSystemMessage BetaManagedAgentsSystemMessageEventType = "system.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format ### Beta Managed Agents System Message Event Params - `type BetaManagedAgentsSystemMessageEventParamsResp struct{…}` Privileged context for the accompanying turn and all subsequent turns, appended to the session's system context as a `role: "system"` turn rather than replacing the top-level system prompt. At most one per request: it must be the final event and immediately follow the `user.message`, `user.tool_result`, or `user.custom_tool_result` it accompanies. Only supported on models that accept mid-conversation system messages. - `Content []BetaManagedAgentsSystemContentBlock` System content blocks to append. Text-only. - `Text string` The text content. - `Type BetaManagedAgentsSystemContentBlockType` - `const BetaManagedAgentsSystemContentBlockTypeText BetaManagedAgentsSystemContentBlockType = "text"` - `Type BetaManagedAgentsSystemMessageEventParamsType` - `const BetaManagedAgentsSystemMessageEventParamsTypeSystemMessage BetaManagedAgentsSystemMessageEventParamsType = "system.message"` ### Beta Managed Agents Text Block - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` ### Beta Managed Agents Text Rubric - `type BetaManagedAgentsTextRubric struct{…}` Rubric content provided inline as text. - `Content string` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type BetaManagedAgentsTextRubricType` - `const BetaManagedAgentsTextRubricTypeText BetaManagedAgentsTextRubricType = "text"` ### Beta Managed Agents Text Rubric Params - `type BetaManagedAgentsTextRubricParamsResp struct{…}` Rubric content provided inline as text. - `Content string` Rubric content. Plain text or markdown — the grader treats it as freeform text. Maximum 262144 characters. - `Type BetaManagedAgentsTextRubricParamsType` - `const BetaManagedAgentsTextRubricParamsTypeText BetaManagedAgentsTextRubricParamsType = "text"` ### Beta Managed Agents Unknown Error - `type BetaManagedAgentsUnknownError struct{…}` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsUnknownErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` - `Type BetaManagedAgentsUnknownErrorType` - `const BetaManagedAgentsUnknownErrorTypeUnknownError BetaManagedAgentsUnknownErrorType = "unknown_error"` ### Beta Managed Agents URL Document Source - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. ### Beta Managed Agents URL Image Source - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. ### Beta Managed Agents User Custom Tool Result Event - `type BetaManagedAgentsUserCustomToolResultEvent struct{…}` Event sent by the client providing the result of a custom tool execution. - `ID string` Unique identifier for this event. - `CustomToolUseID string` The id of the `agent.custom_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserCustomToolResultEventType` - `const BetaManagedAgentsUserCustomToolResultEventTypeUserCustomToolResult BetaManagedAgentsUserCustomToolResultEventType = "user.custom_tool_result"` - `Content []BetaManagedAgentsUserCustomToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. ### Beta Managed Agents User Custom Tool Result Event Params - `type BetaManagedAgentsUserCustomToolResultEventParamsResp struct{…}` Parameters for providing the result of a custom tool execution. - `CustomToolUseID string` The id of the `agent.custom_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserCustomToolResultEventParamsType` - `const BetaManagedAgentsUserCustomToolResultEventParamsTypeUserCustomToolResult BetaManagedAgentsUserCustomToolResultEventParamsType = "user.custom_tool_result"` - `Content []BetaManagedAgentsUserCustomToolResultEventParamsContentUnionResp` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. ### Beta Managed Agents User Define Outcome Event - `type BetaManagedAgentsUserDefineOutcomeEvent struct{…}` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `ID string` Unique identifier for this event. - `Description string` What the agent should produce. Copied from the input event. - `MaxIterations int64` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `OutcomeID string` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Rubric BetaManagedAgentsUserDefineOutcomeEventRubricUnion` Rubric for grading the quality of an outcome. - `type BetaManagedAgentsFileRubric struct{…}` Rubric referenced by a file uploaded via the Files API. - `FileID string` ID of the rubric file. - `Type BetaManagedAgentsFileRubricType` - `const BetaManagedAgentsFileRubricTypeFile BetaManagedAgentsFileRubricType = "file"` - `type BetaManagedAgentsTextRubric struct{…}` Rubric content provided inline as text. - `Content string` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type BetaManagedAgentsTextRubricType` - `const BetaManagedAgentsTextRubricTypeText BetaManagedAgentsTextRubricType = "text"` - `Type BetaManagedAgentsUserDefineOutcomeEventType` - `const BetaManagedAgentsUserDefineOutcomeEventTypeUserDefineOutcome BetaManagedAgentsUserDefineOutcomeEventType = "user.define_outcome"` ### Beta Managed Agents User Define Outcome Event Params - `type BetaManagedAgentsUserDefineOutcomeEventParamsResp struct{…}` Parameters for defining an outcome the agent should work toward. The agent begins work on receipt. - `Description string` What the agent should produce. This is the task specification. - `Rubric BetaManagedAgentsUserDefineOutcomeEventParamsRubricUnionResp` Rubric for grading the quality of an outcome. - `type BetaManagedAgentsFileRubricParamsResp struct{…}` Rubric referenced by a file uploaded via the Files API. - `FileID string` ID of the rubric file. - `Type BetaManagedAgentsFileRubricParamsType` - `const BetaManagedAgentsFileRubricParamsTypeFile BetaManagedAgentsFileRubricParamsType = "file"` - `type BetaManagedAgentsTextRubricParamsResp struct{…}` Rubric content provided inline as text. - `Content string` Rubric content. Plain text or markdown — the grader treats it as freeform text. Maximum 262144 characters. - `Type BetaManagedAgentsTextRubricParamsType` - `const BetaManagedAgentsTextRubricParamsTypeText BetaManagedAgentsTextRubricParamsType = "text"` - `Type BetaManagedAgentsUserDefineOutcomeEventParamsType` - `const BetaManagedAgentsUserDefineOutcomeEventParamsTypeUserDefineOutcome BetaManagedAgentsUserDefineOutcomeEventParamsType = "user.define_outcome"` - `MaxIterations int64` Eval→revision cycles before giving up. Default 3, max 20. ### Beta Managed Agents User Interrupt Event - `type BetaManagedAgentsUserInterruptEvent struct{…}` An interrupt event that pauses agent execution and returns control to the user. - `ID string` Unique identifier for this event. - `Type BetaManagedAgentsUserInterruptEventType` - `const BetaManagedAgentsUserInterruptEventTypeUserInterrupt BetaManagedAgentsUserInterruptEventType = "user.interrupt"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` If absent, interrupts every non-archived thread in a multiagent session (or the primary alone in a single-agent session). If present, interrupts only the named thread. ### Beta Managed Agents User Interrupt Event Params - `type BetaManagedAgentsUserInterruptEventParamsResp struct{…}` Parameters for sending an interrupt to pause the agent. - `Type BetaManagedAgentsUserInterruptEventParamsType` - `const BetaManagedAgentsUserInterruptEventParamsTypeUserInterrupt BetaManagedAgentsUserInterruptEventParamsType = "user.interrupt"` - `SessionThreadID string` If absent, interrupts every non-archived thread in a multiagent session (or the primary alone in a single-agent session). If present, interrupts only the named thread. ### Beta Managed Agents User Message Event - `type BetaManagedAgentsUserMessageEvent struct{…}` A user message event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsUserMessageEventContentUnion` Array of content blocks comprising the user message. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `Type BetaManagedAgentsUserMessageEventType` - `const BetaManagedAgentsUserMessageEventTypeUserMessage BetaManagedAgentsUserMessageEventType = "user.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format ### Beta Managed Agents User Message Event Params - `type BetaManagedAgentsUserMessageEventParamsResp struct{…}` Parameters for sending a user message to the session. - `Content []BetaManagedAgentsUserMessageEventParamsContentUnionResp` Array of content blocks for the user message. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `Type BetaManagedAgentsUserMessageEventParamsType` - `const BetaManagedAgentsUserMessageEventParamsTypeUserMessage BetaManagedAgentsUserMessageEventParamsType = "user.message"` ### Beta Managed Agents User Tool Confirmation Event - `type BetaManagedAgentsUserToolConfirmationEvent struct{…}` A tool confirmation event that approves or denies a pending tool execution. - `ID string` Unique identifier for this event. - `Result BetaManagedAgentsUserToolConfirmationEventResult` UserToolConfirmationResult enum - `const BetaManagedAgentsUserToolConfirmationEventResultAllow BetaManagedAgentsUserToolConfirmationEventResult = "allow"` - `const BetaManagedAgentsUserToolConfirmationEventResultDeny BetaManagedAgentsUserToolConfirmationEventResult = "deny"` - `ToolUseID string` The id of the `agent.tool_use` or `agent.mcp_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolConfirmationEventType` - `const BetaManagedAgentsUserToolConfirmationEventTypeUserToolConfirmation BetaManagedAgentsUserToolConfirmationEventType = "user.tool_confirmation"` - `DenyMessage string` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` When set, the confirmation routes to this subagent's thread rather than the primary. Echo this from the `session_thread_id` on the `agent.tool_use` or `agent.mcp_tool_use` event that prompted the approval. ### Beta Managed Agents User Tool Confirmation Event Params - `type BetaManagedAgentsUserToolConfirmationEventParamsResp struct{…}` Parameters for confirming or denying a tool execution request. - `Result BetaManagedAgentsUserToolConfirmationEventParamsResult` UserToolConfirmationResult enum - `const BetaManagedAgentsUserToolConfirmationEventParamsResultAllow BetaManagedAgentsUserToolConfirmationEventParamsResult = "allow"` - `const BetaManagedAgentsUserToolConfirmationEventParamsResultDeny BetaManagedAgentsUserToolConfirmationEventParamsResult = "deny"` - `ToolUseID string` The id of the `agent.tool_use` or `agent.mcp_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolConfirmationEventParamsType` - `const BetaManagedAgentsUserToolConfirmationEventParamsTypeUserToolConfirmation BetaManagedAgentsUserToolConfirmationEventParamsType = "user.tool_confirmation"` - `DenyMessage string` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. ### Beta Managed Agents User Tool Result Event Params - `type BetaManagedAgentsUserToolResultEventParamsResp struct{…}` Parameters for providing the result of an agent-toolset tool execution. Only valid on `self_hosted` environments, where sandbox-routed tools are executed by the client rather than the server. - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolResultEventParamsType` - `const BetaManagedAgentsUserToolResultEventParamsTypeUserToolResult BetaManagedAgentsUserToolResultEventParamsType = "user.tool_result"` - `Content []BetaManagedAgentsUserToolResultEventParamsContentUnionResp` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. # Resources ## Add Session Resource `client.Beta.Sessions.Resources.Add(ctx, sessionID, params) (*BetaManagedAgentsFileResource, error)` **post** `/v1/sessions/{session_id}/resources` Add Session Resource ### Parameters - `sessionID string` - `params BetaSessionResourceAddParams` - `BetaManagedAgentsFileResourceParams param.Field[BetaManagedAgentsFileResourceParamsResp]` Body param: Mount a file uploaded via the Files API into the session. - `Betas param.Field[[]AnthropicBeta]` Header param: Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsFileResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `FileID string` - `MountPath string` - `Type BetaManagedAgentsFileResourceType` - `const BetaManagedAgentsFileResourceTypeFile BetaManagedAgentsFileResourceType = "file"` - `UpdatedAt Time` A timestamp in RFC 3339 format ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) betaManagedAgentsFileResource, err := client.Beta.Sessions.Resources.Add( context.TODO(), "sesn_011CZkZAtmR3yMPDzynEDxu7", anthropic.BetaSessionResourceAddParams{ BetaManagedAgentsFileResourceParams: anthropic.BetaManagedAgentsFileResourceParams{ FileID: "file_011CNha8iCJcU1wXNR6q4V8w", Type: anthropic.BetaManagedAgentsFileResourceParamsTypeFile, }, }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", betaManagedAgentsFileResource.ID) } ``` #### Response ```json { "id": "sesrsc_011CZkZBJq5dWxk9fVLNcPht", "created_at": "2026-03-15T10:00:00Z", "file_id": "file_011CNha8iCJcU1wXNR6q4V8w", "mount_path": "/uploads/receipt.pdf", "type": "file", "updated_at": "2026-03-15T10:00:00Z" } ``` ## List Session Resources `client.Beta.Sessions.Resources.List(ctx, sessionID, params) (*PageCursor[BetaManagedAgentsSessionResourceUnion], error)` **get** `/v1/sessions/{session_id}/resources` List Session Resources ### Parameters - `sessionID string` - `params BetaSessionResourceListParams` - `Limit param.Field[int64]` Query param: Maximum number of resources to return per page (max 1000). If omitted, returns all resources. - `Page param.Field[string]` Query param: Opaque cursor from a previous response's next_page field. - `Betas param.Field[[]AnthropicBeta]` Header param: Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsSessionResourceUnion interface{…}` A memory store attached to an agent session. - `type BetaManagedAgentsGitHubRepositoryResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `MountPath string` - `Type BetaManagedAgentsGitHubRepositoryResourceType` - `const BetaManagedAgentsGitHubRepositoryResourceTypeGitHubRepository BetaManagedAgentsGitHubRepositoryResourceType = "github_repository"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `URL string` - `Checkout BetaManagedAgentsGitHubRepositoryResourceCheckoutUnion` - `type BetaManagedAgentsBranchCheckout struct{…}` - `Name string` Branch name to check out. - `Type BetaManagedAgentsBranchCheckoutType` - `const BetaManagedAgentsBranchCheckoutTypeBranch BetaManagedAgentsBranchCheckoutType = "branch"` - `type BetaManagedAgentsCommitCheckout struct{…}` - `Sha string` Full commit SHA to check out. - `Type BetaManagedAgentsCommitCheckoutType` - `const BetaManagedAgentsCommitCheckoutTypeCommit BetaManagedAgentsCommitCheckoutType = "commit"` - `type BetaManagedAgentsFileResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `FileID string` - `MountPath string` - `Type BetaManagedAgentsFileResourceType` - `const BetaManagedAgentsFileResourceTypeFile BetaManagedAgentsFileResourceType = "file"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsMemoryStoreResource struct{…}` A memory store attached to an agent session. - `MemoryStoreID string` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type BetaManagedAgentsMemoryStoreResourceType` - `const BetaManagedAgentsMemoryStoreResourceTypeMemoryStore BetaManagedAgentsMemoryStoreResourceType = "memory_store"` - `Access BetaManagedAgentsMemoryStoreResourceAccess` Access mode for an attached memory store. - `const BetaManagedAgentsMemoryStoreResourceAccessReadWrite BetaManagedAgentsMemoryStoreResourceAccess = "read_write"` - `const BetaManagedAgentsMemoryStoreResourceAccessReadOnly BetaManagedAgentsMemoryStoreResourceAccess = "read_only"` - `Description string` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Instructions string` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `MountPath string` Filesystem path where the store is mounted in the session container, e.g. /mnt/memory/user-preferences. Derived from the store's name. Output-only. - `Name string` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) page, err := client.Beta.Sessions.Resources.List( context.TODO(), "sesn_011CZkZAtmR3yMPDzynEDxu7", anthropic.BetaSessionResourceListParams{ }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", page) } ``` #### Response ```json { "data": [ { "id": "sesrsc_011CZkZBJq5dWxk9fVLNcPht", "created_at": "2026-03-15T10:00:00Z", "file_id": "file_011CNha8iCJcU1wXNR6q4V8w", "mount_path": "/uploads/receipt.pdf", "type": "file", "updated_at": "2026-03-15T10:00:00Z" }, { "id": "sesrsc_011CZkZCKr6eXyl0gWMOdQiu", "created_at": "2026-03-15T10:00:00Z", "mount_path": "/workspace/example-repo", "type": "github_repository", "updated_at": "2026-03-15T10:00:00Z", "url": "https://github.com/example-org/example-repo", "checkout": { "name": "main", "type": "branch" } } ], "next_page": "page_MjAyNS0wNS0xNFQwMDowMDowMFo=" } ``` ## Get Session Resource `client.Beta.Sessions.Resources.Get(ctx, resourceID, params) (*BetaSessionResourceGetResponseUnion, error)` **get** `/v1/sessions/{session_id}/resources/{resource_id}` Get Session Resource ### Parameters - `resourceID string` - `params BetaSessionResourceGetParams` - `SessionID param.Field[string]` Path param: Path parameter session_id - `Betas param.Field[[]AnthropicBeta]` Header param: Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaSessionResourceGetResponseUnion interface{…}` The requested session resource. - `type BetaManagedAgentsGitHubRepositoryResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `MountPath string` - `Type BetaManagedAgentsGitHubRepositoryResourceType` - `const BetaManagedAgentsGitHubRepositoryResourceTypeGitHubRepository BetaManagedAgentsGitHubRepositoryResourceType = "github_repository"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `URL string` - `Checkout BetaManagedAgentsGitHubRepositoryResourceCheckoutUnion` - `type BetaManagedAgentsBranchCheckout struct{…}` - `Name string` Branch name to check out. - `Type BetaManagedAgentsBranchCheckoutType` - `const BetaManagedAgentsBranchCheckoutTypeBranch BetaManagedAgentsBranchCheckoutType = "branch"` - `type BetaManagedAgentsCommitCheckout struct{…}` - `Sha string` Full commit SHA to check out. - `Type BetaManagedAgentsCommitCheckoutType` - `const BetaManagedAgentsCommitCheckoutTypeCommit BetaManagedAgentsCommitCheckoutType = "commit"` - `type BetaManagedAgentsFileResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `FileID string` - `MountPath string` - `Type BetaManagedAgentsFileResourceType` - `const BetaManagedAgentsFileResourceTypeFile BetaManagedAgentsFileResourceType = "file"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsMemoryStoreResource struct{…}` A memory store attached to an agent session. - `MemoryStoreID string` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type BetaManagedAgentsMemoryStoreResourceType` - `const BetaManagedAgentsMemoryStoreResourceTypeMemoryStore BetaManagedAgentsMemoryStoreResourceType = "memory_store"` - `Access BetaManagedAgentsMemoryStoreResourceAccess` Access mode for an attached memory store. - `const BetaManagedAgentsMemoryStoreResourceAccessReadWrite BetaManagedAgentsMemoryStoreResourceAccess = "read_write"` - `const BetaManagedAgentsMemoryStoreResourceAccessReadOnly BetaManagedAgentsMemoryStoreResourceAccess = "read_only"` - `Description string` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Instructions string` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `MountPath string` Filesystem path where the store is mounted in the session container, e.g. /mnt/memory/user-preferences. Derived from the store's name. Output-only. - `Name string` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) resource, err := client.Beta.Sessions.Resources.Get( context.TODO(), "sesrsc_011CZkZBJq5dWxk9fVLNcPht", anthropic.BetaSessionResourceGetParams{ SessionID: "sesn_011CZkZAtmR3yMPDzynEDxu7", }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", resource) } ``` #### Response ```json { "id": "sesrsc_011CZkZCKr6eXyl0gWMOdQiu", "created_at": "2026-03-15T10:00:00Z", "mount_path": "/workspace/example-repo", "type": "github_repository", "updated_at": "2026-03-15T10:00:00Z", "url": "https://github.com/example-org/example-repo", "checkout": { "name": "main", "type": "branch" } } ``` ## Update Session Resource `client.Beta.Sessions.Resources.Update(ctx, resourceID, params) (*BetaSessionResourceUpdateResponseUnion, error)` **post** `/v1/sessions/{session_id}/resources/{resource_id}` Update Session Resource ### Parameters - `resourceID string` - `params BetaSessionResourceUpdateParams` - `SessionID param.Field[string]` Path param: Path parameter session_id - `AuthorizationToken param.Field[string]` Body param: New authorization token for the resource. Currently only `github_repository` resources support token rotation. - `Betas param.Field[[]AnthropicBeta]` Header param: Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaSessionResourceUpdateResponseUnion interface{…}` The updated session resource. - `type BetaManagedAgentsGitHubRepositoryResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `MountPath string` - `Type BetaManagedAgentsGitHubRepositoryResourceType` - `const BetaManagedAgentsGitHubRepositoryResourceTypeGitHubRepository BetaManagedAgentsGitHubRepositoryResourceType = "github_repository"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `URL string` - `Checkout BetaManagedAgentsGitHubRepositoryResourceCheckoutUnion` - `type BetaManagedAgentsBranchCheckout struct{…}` - `Name string` Branch name to check out. - `Type BetaManagedAgentsBranchCheckoutType` - `const BetaManagedAgentsBranchCheckoutTypeBranch BetaManagedAgentsBranchCheckoutType = "branch"` - `type BetaManagedAgentsCommitCheckout struct{…}` - `Sha string` Full commit SHA to check out. - `Type BetaManagedAgentsCommitCheckoutType` - `const BetaManagedAgentsCommitCheckoutTypeCommit BetaManagedAgentsCommitCheckoutType = "commit"` - `type BetaManagedAgentsFileResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `FileID string` - `MountPath string` - `Type BetaManagedAgentsFileResourceType` - `const BetaManagedAgentsFileResourceTypeFile BetaManagedAgentsFileResourceType = "file"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsMemoryStoreResource struct{…}` A memory store attached to an agent session. - `MemoryStoreID string` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type BetaManagedAgentsMemoryStoreResourceType` - `const BetaManagedAgentsMemoryStoreResourceTypeMemoryStore BetaManagedAgentsMemoryStoreResourceType = "memory_store"` - `Access BetaManagedAgentsMemoryStoreResourceAccess` Access mode for an attached memory store. - `const BetaManagedAgentsMemoryStoreResourceAccessReadWrite BetaManagedAgentsMemoryStoreResourceAccess = "read_write"` - `const BetaManagedAgentsMemoryStoreResourceAccessReadOnly BetaManagedAgentsMemoryStoreResourceAccess = "read_only"` - `Description string` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Instructions string` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `MountPath string` Filesystem path where the store is mounted in the session container, e.g. /mnt/memory/user-preferences. Derived from the store's name. Output-only. - `Name string` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) resource, err := client.Beta.Sessions.Resources.Update( context.TODO(), "sesrsc_011CZkZBJq5dWxk9fVLNcPht", anthropic.BetaSessionResourceUpdateParams{ SessionID: "sesn_011CZkZAtmR3yMPDzynEDxu7", AuthorizationToken: "ghp_exampletoken", }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", resource) } ``` #### Response ```json { "id": "sesrsc_011CZkZCKr6eXyl0gWMOdQiu", "created_at": "2026-03-15T10:00:00Z", "mount_path": "/workspace/example-repo", "type": "github_repository", "updated_at": "2026-03-15T10:00:00Z", "url": "https://github.com/example-org/example-repo", "checkout": { "name": "main", "type": "branch" } } ``` ## Delete Session Resource `client.Beta.Sessions.Resources.Delete(ctx, resourceID, params) (*BetaManagedAgentsDeleteSessionResource, error)` **delete** `/v1/sessions/{session_id}/resources/{resource_id}` Delete Session Resource ### Parameters - `resourceID string` - `params BetaSessionResourceDeleteParams` - `SessionID param.Field[string]` Path param: Path parameter session_id - `Betas param.Field[[]AnthropicBeta]` Header param: Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsDeleteSessionResource struct{…}` Confirmation of resource deletion. - `ID string` - `Type BetaManagedAgentsDeleteSessionResourceType` - `const BetaManagedAgentsDeleteSessionResourceTypeSessionResourceDeleted BetaManagedAgentsDeleteSessionResourceType = "session_resource_deleted"` ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) betaManagedAgentsDeleteSessionResource, err := client.Beta.Sessions.Resources.Delete( context.TODO(), "sesrsc_011CZkZBJq5dWxk9fVLNcPht", anthropic.BetaSessionResourceDeleteParams{ SessionID: "sesn_011CZkZAtmR3yMPDzynEDxu7", }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", betaManagedAgentsDeleteSessionResource.ID) } ``` #### Response ```json { "id": "sesrsc_011CZkZBJq5dWxk9fVLNcPht", "type": "session_resource_deleted" } ``` ## Domain Types ### Beta Managed Agents Delete Session Resource - `type BetaManagedAgentsDeleteSessionResource struct{…}` Confirmation of resource deletion. - `ID string` - `Type BetaManagedAgentsDeleteSessionResourceType` - `const BetaManagedAgentsDeleteSessionResourceTypeSessionResourceDeleted BetaManagedAgentsDeleteSessionResourceType = "session_resource_deleted"` ### Beta Managed Agents File Resource - `type BetaManagedAgentsFileResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `FileID string` - `MountPath string` - `Type BetaManagedAgentsFileResourceType` - `const BetaManagedAgentsFileResourceTypeFile BetaManagedAgentsFileResourceType = "file"` - `UpdatedAt Time` A timestamp in RFC 3339 format ### Beta Managed Agents GitHub Repository Resource - `type BetaManagedAgentsGitHubRepositoryResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `MountPath string` - `Type BetaManagedAgentsGitHubRepositoryResourceType` - `const BetaManagedAgentsGitHubRepositoryResourceTypeGitHubRepository BetaManagedAgentsGitHubRepositoryResourceType = "github_repository"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `URL string` - `Checkout BetaManagedAgentsGitHubRepositoryResourceCheckoutUnion` - `type BetaManagedAgentsBranchCheckout struct{…}` - `Name string` Branch name to check out. - `Type BetaManagedAgentsBranchCheckoutType` - `const BetaManagedAgentsBranchCheckoutTypeBranch BetaManagedAgentsBranchCheckoutType = "branch"` - `type BetaManagedAgentsCommitCheckout struct{…}` - `Sha string` Full commit SHA to check out. - `Type BetaManagedAgentsCommitCheckoutType` - `const BetaManagedAgentsCommitCheckoutTypeCommit BetaManagedAgentsCommitCheckoutType = "commit"` ### Beta Managed Agents Memory Store Resource - `type BetaManagedAgentsMemoryStoreResource struct{…}` A memory store attached to an agent session. - `MemoryStoreID string` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type BetaManagedAgentsMemoryStoreResourceType` - `const BetaManagedAgentsMemoryStoreResourceTypeMemoryStore BetaManagedAgentsMemoryStoreResourceType = "memory_store"` - `Access BetaManagedAgentsMemoryStoreResourceAccess` Access mode for an attached memory store. - `const BetaManagedAgentsMemoryStoreResourceAccessReadWrite BetaManagedAgentsMemoryStoreResourceAccess = "read_write"` - `const BetaManagedAgentsMemoryStoreResourceAccessReadOnly BetaManagedAgentsMemoryStoreResourceAccess = "read_only"` - `Description string` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Instructions string` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `MountPath string` Filesystem path where the store is mounted in the session container, e.g. /mnt/memory/user-preferences. Derived from the store's name. Output-only. - `Name string` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. ### Beta Managed Agents Session Resource - `type BetaManagedAgentsSessionResourceUnion interface{…}` A memory store attached to an agent session. - `type BetaManagedAgentsGitHubRepositoryResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `MountPath string` - `Type BetaManagedAgentsGitHubRepositoryResourceType` - `const BetaManagedAgentsGitHubRepositoryResourceTypeGitHubRepository BetaManagedAgentsGitHubRepositoryResourceType = "github_repository"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `URL string` - `Checkout BetaManagedAgentsGitHubRepositoryResourceCheckoutUnion` - `type BetaManagedAgentsBranchCheckout struct{…}` - `Name string` Branch name to check out. - `Type BetaManagedAgentsBranchCheckoutType` - `const BetaManagedAgentsBranchCheckoutTypeBranch BetaManagedAgentsBranchCheckoutType = "branch"` - `type BetaManagedAgentsCommitCheckout struct{…}` - `Sha string` Full commit SHA to check out. - `Type BetaManagedAgentsCommitCheckoutType` - `const BetaManagedAgentsCommitCheckoutTypeCommit BetaManagedAgentsCommitCheckoutType = "commit"` - `type BetaManagedAgentsFileResource struct{…}` - `ID string` - `CreatedAt Time` A timestamp in RFC 3339 format - `FileID string` - `MountPath string` - `Type BetaManagedAgentsFileResourceType` - `const BetaManagedAgentsFileResourceTypeFile BetaManagedAgentsFileResourceType = "file"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsMemoryStoreResource struct{…}` A memory store attached to an agent session. - `MemoryStoreID string` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type BetaManagedAgentsMemoryStoreResourceType` - `const BetaManagedAgentsMemoryStoreResourceTypeMemoryStore BetaManagedAgentsMemoryStoreResourceType = "memory_store"` - `Access BetaManagedAgentsMemoryStoreResourceAccess` Access mode for an attached memory store. - `const BetaManagedAgentsMemoryStoreResourceAccessReadWrite BetaManagedAgentsMemoryStoreResourceAccess = "read_write"` - `const BetaManagedAgentsMemoryStoreResourceAccessReadOnly BetaManagedAgentsMemoryStoreResourceAccess = "read_only"` - `Description string` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Instructions string` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `MountPath string` Filesystem path where the store is mounted in the session container, e.g. /mnt/memory/user-preferences. Derived from the store's name. Output-only. - `Name string` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. # Threads ## List Session Threads `client.Beta.Sessions.Threads.List(ctx, sessionID, params) (*PageCursor[BetaManagedAgentsSessionThread], error)` **get** `/v1/sessions/{session_id}/threads` List Session Threads ### Parameters - `sessionID string` - `params BetaSessionThreadListParams` - `Limit param.Field[int64]` Query param: Maximum results per page. Defaults to 1000. - `Page param.Field[string]` Query param: Opaque pagination cursor from a previous response's next_page. Forward-only. - `Betas param.Field[[]AnthropicBeta]` Header param: Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsSessionThread struct{…}` An execution thread within a `session`. Each session has one primary thread plus zero or more child threads spawned by the coordinator. - `ID string` Unique identifier for this thread. - `Agent BetaManagedAgentsSessionThreadAgent` Resolved `agent` definition for a single `session_thread`. Snapshot of the agent at thread creation time. The multiagent roster is not repeated here; read it from `Session.agent`. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `ArchivedAt Time` A timestamp in RFC 3339 format - `CreatedAt Time` A timestamp in RFC 3339 format - `ParentThreadID string` Parent thread that spawned this thread. Null for the primary thread. - `SessionID string` The session this thread belongs to. - `Stats BetaManagedAgentsSessionThreadStats` Timing statistics for a session thread. - `ActiveSeconds float64` Cumulative time in seconds the thread spent actively running. Excludes idle time. - `DurationSeconds float64` Elapsed time since thread creation in seconds. For archived threads, frozen at the final update. - `StartupSeconds float64` Time in seconds for the thread to begin running. Zero for child threads, which start immediately. - `Status BetaManagedAgentsSessionThreadStatus` SessionThreadStatus enum - `const BetaManagedAgentsSessionThreadStatusRunning BetaManagedAgentsSessionThreadStatus = "running"` - `const BetaManagedAgentsSessionThreadStatusIdle BetaManagedAgentsSessionThreadStatus = "idle"` - `const BetaManagedAgentsSessionThreadStatusRescheduling BetaManagedAgentsSessionThreadStatus = "rescheduling"` - `const BetaManagedAgentsSessionThreadStatusTerminated BetaManagedAgentsSessionThreadStatus = "terminated"` - `Type BetaManagedAgentsSessionThreadType` - `const BetaManagedAgentsSessionThreadTypeSessionThread BetaManagedAgentsSessionThreadType = "session_thread"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `Usage BetaManagedAgentsSessionThreadUsage` Cumulative token usage for a session thread across all turns. - `CacheCreation BetaManagedAgentsCacheCreationUsage` Prompt-cache creation token usage broken down by cache lifetime. - `Ephemeral1hInputTokens int64` Tokens used to create 1-hour ephemeral cache entries. - `Ephemeral5mInputTokens int64` Tokens used to create 5-minute ephemeral cache entries. - `CacheReadInputTokens int64` Total tokens read from prompt cache. - `InputTokens int64` Total input tokens consumed across all turns. - `OutputTokens int64` Total output tokens generated across all turns. ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) page, err := client.Beta.Sessions.Threads.List( context.TODO(), "sesn_011CZkZAtmR3yMPDzynEDxu7", anthropic.BetaSessionThreadListParams{ }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", page) } ``` #### Response ```json { "data": [ { "id": "sthr_011CZkZVWa6oIjw0rgXZpnBt", "agent": { "id": "agent_011CZkYqphY8vELVzwCUpqiQ", "description": "A focused research subagent.", "mcp_servers": [ { "name": "example-mcp", "type": "url", "url": "https://example-server.modelcontextprotocol.io/sse" } ], "model": { "id": "claude-sonnet-4-6", "speed": "standard" }, "name": "Researcher", "skills": [ { "skill_id": "xlsx", "type": "anthropic", "version": "1" } ], "system": "You are a research subagent that gathers and summarises sources for the coordinating agent.", "tools": [ { "configs": [ { "enabled": true, "name": "bash", "permission_policy": { "type": "always_allow" } } ], "default_config": { "enabled": true, "permission_policy": { "type": "always_ask" } }, "type": "agent_toolset_20260401" } ], "type": "agent", "version": 1 }, "archived_at": null, "created_at": "2026-03-15T10:00:00Z", "parent_thread_id": null, "session_id": "sesn_011CZkZAtmR3yMPDzynEDxu7", "stats": { "active_seconds": 0, "duration_seconds": 0, "startup_seconds": 0 }, "status": "idle", "type": "session_thread", "updated_at": "2026-03-15T10:00:00Z", "usage": { "cache_creation": { "ephemeral_1h_input_tokens": 0, "ephemeral_5m_input_tokens": 0 }, "cache_read_input_tokens": 0, "input_tokens": 0, "output_tokens": 0 } } ], "next_page": "page_MjAyNS0wNS0xNFQwMDowMDowMFo=" } ``` ## Get Session Thread `client.Beta.Sessions.Threads.Get(ctx, threadID, params) (*BetaManagedAgentsSessionThread, error)` **get** `/v1/sessions/{session_id}/threads/{thread_id}` Get Session Thread ### Parameters - `threadID string` - `params BetaSessionThreadGetParams` - `SessionID param.Field[string]` Path param: Path parameter session_id - `Betas param.Field[[]AnthropicBeta]` Header param: Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsSessionThread struct{…}` An execution thread within a `session`. Each session has one primary thread plus zero or more child threads spawned by the coordinator. - `ID string` Unique identifier for this thread. - `Agent BetaManagedAgentsSessionThreadAgent` Resolved `agent` definition for a single `session_thread`. Snapshot of the agent at thread creation time. The multiagent roster is not repeated here; read it from `Session.agent`. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `ArchivedAt Time` A timestamp in RFC 3339 format - `CreatedAt Time` A timestamp in RFC 3339 format - `ParentThreadID string` Parent thread that spawned this thread. Null for the primary thread. - `SessionID string` The session this thread belongs to. - `Stats BetaManagedAgentsSessionThreadStats` Timing statistics for a session thread. - `ActiveSeconds float64` Cumulative time in seconds the thread spent actively running. Excludes idle time. - `DurationSeconds float64` Elapsed time since thread creation in seconds. For archived threads, frozen at the final update. - `StartupSeconds float64` Time in seconds for the thread to begin running. Zero for child threads, which start immediately. - `Status BetaManagedAgentsSessionThreadStatus` SessionThreadStatus enum - `const BetaManagedAgentsSessionThreadStatusRunning BetaManagedAgentsSessionThreadStatus = "running"` - `const BetaManagedAgentsSessionThreadStatusIdle BetaManagedAgentsSessionThreadStatus = "idle"` - `const BetaManagedAgentsSessionThreadStatusRescheduling BetaManagedAgentsSessionThreadStatus = "rescheduling"` - `const BetaManagedAgentsSessionThreadStatusTerminated BetaManagedAgentsSessionThreadStatus = "terminated"` - `Type BetaManagedAgentsSessionThreadType` - `const BetaManagedAgentsSessionThreadTypeSessionThread BetaManagedAgentsSessionThreadType = "session_thread"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `Usage BetaManagedAgentsSessionThreadUsage` Cumulative token usage for a session thread across all turns. - `CacheCreation BetaManagedAgentsCacheCreationUsage` Prompt-cache creation token usage broken down by cache lifetime. - `Ephemeral1hInputTokens int64` Tokens used to create 1-hour ephemeral cache entries. - `Ephemeral5mInputTokens int64` Tokens used to create 5-minute ephemeral cache entries. - `CacheReadInputTokens int64` Total tokens read from prompt cache. - `InputTokens int64` Total input tokens consumed across all turns. - `OutputTokens int64` Total output tokens generated across all turns. ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) betaManagedAgentsSessionThread, err := client.Beta.Sessions.Threads.Get( context.TODO(), "sthr_011CZkZVWa6oIjw0rgXZpnBt", anthropic.BetaSessionThreadGetParams{ SessionID: "sesn_011CZkZAtmR3yMPDzynEDxu7", }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", betaManagedAgentsSessionThread.ID) } ``` #### Response ```json { "id": "sthr_011CZkZVWa6oIjw0rgXZpnBt", "agent": { "id": "agent_011CZkYqphY8vELVzwCUpqiQ", "description": "A focused research subagent.", "mcp_servers": [ { "name": "example-mcp", "type": "url", "url": "https://example-server.modelcontextprotocol.io/sse" } ], "model": { "id": "claude-sonnet-4-6", "speed": "standard" }, "name": "Researcher", "skills": [ { "skill_id": "xlsx", "type": "anthropic", "version": "1" } ], "system": "You are a research subagent that gathers and summarises sources for the coordinating agent.", "tools": [ { "configs": [ { "enabled": true, "name": "bash", "permission_policy": { "type": "always_allow" } } ], "default_config": { "enabled": true, "permission_policy": { "type": "always_ask" } }, "type": "agent_toolset_20260401" } ], "type": "agent", "version": 1 }, "archived_at": null, "created_at": "2026-03-15T10:00:00Z", "parent_thread_id": null, "session_id": "sesn_011CZkZAtmR3yMPDzynEDxu7", "stats": { "active_seconds": 0, "duration_seconds": 0, "startup_seconds": 0 }, "status": "idle", "type": "session_thread", "updated_at": "2026-03-15T10:00:00Z", "usage": { "cache_creation": { "ephemeral_1h_input_tokens": 0, "ephemeral_5m_input_tokens": 0 }, "cache_read_input_tokens": 0, "input_tokens": 0, "output_tokens": 0 } } ``` ## Archive Session Thread `client.Beta.Sessions.Threads.Archive(ctx, threadID, params) (*BetaManagedAgentsSessionThread, error)` **post** `/v1/sessions/{session_id}/threads/{thread_id}/archive` Archive Session Thread ### Parameters - `threadID string` - `params BetaSessionThreadArchiveParams` - `SessionID param.Field[string]` Path param: Path parameter session_id - `Betas param.Field[[]AnthropicBeta]` Header param: Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsSessionThread struct{…}` An execution thread within a `session`. Each session has one primary thread plus zero or more child threads spawned by the coordinator. - `ID string` Unique identifier for this thread. - `Agent BetaManagedAgentsSessionThreadAgent` Resolved `agent` definition for a single `session_thread`. Snapshot of the agent at thread creation time. The multiagent roster is not repeated here; read it from `Session.agent`. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `ArchivedAt Time` A timestamp in RFC 3339 format - `CreatedAt Time` A timestamp in RFC 3339 format - `ParentThreadID string` Parent thread that spawned this thread. Null for the primary thread. - `SessionID string` The session this thread belongs to. - `Stats BetaManagedAgentsSessionThreadStats` Timing statistics for a session thread. - `ActiveSeconds float64` Cumulative time in seconds the thread spent actively running. Excludes idle time. - `DurationSeconds float64` Elapsed time since thread creation in seconds. For archived threads, frozen at the final update. - `StartupSeconds float64` Time in seconds for the thread to begin running. Zero for child threads, which start immediately. - `Status BetaManagedAgentsSessionThreadStatus` SessionThreadStatus enum - `const BetaManagedAgentsSessionThreadStatusRunning BetaManagedAgentsSessionThreadStatus = "running"` - `const BetaManagedAgentsSessionThreadStatusIdle BetaManagedAgentsSessionThreadStatus = "idle"` - `const BetaManagedAgentsSessionThreadStatusRescheduling BetaManagedAgentsSessionThreadStatus = "rescheduling"` - `const BetaManagedAgentsSessionThreadStatusTerminated BetaManagedAgentsSessionThreadStatus = "terminated"` - `Type BetaManagedAgentsSessionThreadType` - `const BetaManagedAgentsSessionThreadTypeSessionThread BetaManagedAgentsSessionThreadType = "session_thread"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `Usage BetaManagedAgentsSessionThreadUsage` Cumulative token usage for a session thread across all turns. - `CacheCreation BetaManagedAgentsCacheCreationUsage` Prompt-cache creation token usage broken down by cache lifetime. - `Ephemeral1hInputTokens int64` Tokens used to create 1-hour ephemeral cache entries. - `Ephemeral5mInputTokens int64` Tokens used to create 5-minute ephemeral cache entries. - `CacheReadInputTokens int64` Total tokens read from prompt cache. - `InputTokens int64` Total input tokens consumed across all turns. - `OutputTokens int64` Total output tokens generated across all turns. ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) betaManagedAgentsSessionThread, err := client.Beta.Sessions.Threads.Archive( context.TODO(), "sthr_011CZkZVWa6oIjw0rgXZpnBt", anthropic.BetaSessionThreadArchiveParams{ SessionID: "sesn_011CZkZAtmR3yMPDzynEDxu7", }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", betaManagedAgentsSessionThread.ID) } ``` #### Response ```json { "id": "sthr_011CZkZVWa6oIjw0rgXZpnBt", "agent": { "id": "agent_011CZkYqphY8vELVzwCUpqiQ", "description": "A focused research subagent.", "mcp_servers": [ { "name": "example-mcp", "type": "url", "url": "https://example-server.modelcontextprotocol.io/sse" } ], "model": { "id": "claude-sonnet-4-6", "speed": "standard" }, "name": "Researcher", "skills": [ { "skill_id": "xlsx", "type": "anthropic", "version": "1" } ], "system": "You are a research subagent that gathers and summarises sources for the coordinating agent.", "tools": [ { "configs": [ { "enabled": true, "name": "bash", "permission_policy": { "type": "always_allow" } } ], "default_config": { "enabled": true, "permission_policy": { "type": "always_ask" } }, "type": "agent_toolset_20260401" } ], "type": "agent", "version": 1 }, "archived_at": null, "created_at": "2026-03-15T10:00:00Z", "parent_thread_id": null, "session_id": "sesn_011CZkZAtmR3yMPDzynEDxu7", "stats": { "active_seconds": 0, "duration_seconds": 0, "startup_seconds": 0 }, "status": "idle", "type": "session_thread", "updated_at": "2026-03-15T10:00:00Z", "usage": { "cache_creation": { "ephemeral_1h_input_tokens": 0, "ephemeral_5m_input_tokens": 0 }, "cache_read_input_tokens": 0, "input_tokens": 0, "output_tokens": 0 } } ``` ## Domain Types ### Beta Managed Agents Session Thread - `type BetaManagedAgentsSessionThread struct{…}` An execution thread within a `session`. Each session has one primary thread plus zero or more child threads spawned by the coordinator. - `ID string` Unique identifier for this thread. - `Agent BetaManagedAgentsSessionThreadAgent` Resolved `agent` definition for a single `session_thread`. Snapshot of the agent at thread creation time. The multiagent roster is not repeated here; read it from `Session.agent`. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `ArchivedAt Time` A timestamp in RFC 3339 format - `CreatedAt Time` A timestamp in RFC 3339 format - `ParentThreadID string` Parent thread that spawned this thread. Null for the primary thread. - `SessionID string` The session this thread belongs to. - `Stats BetaManagedAgentsSessionThreadStats` Timing statistics for a session thread. - `ActiveSeconds float64` Cumulative time in seconds the thread spent actively running. Excludes idle time. - `DurationSeconds float64` Elapsed time since thread creation in seconds. For archived threads, frozen at the final update. - `StartupSeconds float64` Time in seconds for the thread to begin running. Zero for child threads, which start immediately. - `Status BetaManagedAgentsSessionThreadStatus` SessionThreadStatus enum - `const BetaManagedAgentsSessionThreadStatusRunning BetaManagedAgentsSessionThreadStatus = "running"` - `const BetaManagedAgentsSessionThreadStatusIdle BetaManagedAgentsSessionThreadStatus = "idle"` - `const BetaManagedAgentsSessionThreadStatusRescheduling BetaManagedAgentsSessionThreadStatus = "rescheduling"` - `const BetaManagedAgentsSessionThreadStatusTerminated BetaManagedAgentsSessionThreadStatus = "terminated"` - `Type BetaManagedAgentsSessionThreadType` - `const BetaManagedAgentsSessionThreadTypeSessionThread BetaManagedAgentsSessionThreadType = "session_thread"` - `UpdatedAt Time` A timestamp in RFC 3339 format - `Usage BetaManagedAgentsSessionThreadUsage` Cumulative token usage for a session thread across all turns. - `CacheCreation BetaManagedAgentsCacheCreationUsage` Prompt-cache creation token usage broken down by cache lifetime. - `Ephemeral1hInputTokens int64` Tokens used to create 1-hour ephemeral cache entries. - `Ephemeral5mInputTokens int64` Tokens used to create 5-minute ephemeral cache entries. - `CacheReadInputTokens int64` Total tokens read from prompt cache. - `InputTokens int64` Total input tokens consumed across all turns. - `OutputTokens int64` Total output tokens generated across all turns. ### Beta Managed Agents Session Thread Stats - `type BetaManagedAgentsSessionThreadStats struct{…}` Timing statistics for a session thread. - `ActiveSeconds float64` Cumulative time in seconds the thread spent actively running. Excludes idle time. - `DurationSeconds float64` Elapsed time since thread creation in seconds. For archived threads, frozen at the final update. - `StartupSeconds float64` Time in seconds for the thread to begin running. Zero for child threads, which start immediately. ### Beta Managed Agents Session Thread Status - `type BetaManagedAgentsSessionThreadStatus string` SessionThreadStatus enum - `const BetaManagedAgentsSessionThreadStatusRunning BetaManagedAgentsSessionThreadStatus = "running"` - `const BetaManagedAgentsSessionThreadStatusIdle BetaManagedAgentsSessionThreadStatus = "idle"` - `const BetaManagedAgentsSessionThreadStatusRescheduling BetaManagedAgentsSessionThreadStatus = "rescheduling"` - `const BetaManagedAgentsSessionThreadStatusTerminated BetaManagedAgentsSessionThreadStatus = "terminated"` ### Beta Managed Agents Session Thread Usage - `type BetaManagedAgentsSessionThreadUsage struct{…}` Cumulative token usage for a session thread across all turns. - `CacheCreation BetaManagedAgentsCacheCreationUsage` Prompt-cache creation token usage broken down by cache lifetime. - `Ephemeral1hInputTokens int64` Tokens used to create 1-hour ephemeral cache entries. - `Ephemeral5mInputTokens int64` Tokens used to create 5-minute ephemeral cache entries. - `CacheReadInputTokens int64` Total tokens read from prompt cache. - `InputTokens int64` Total input tokens consumed across all turns. - `OutputTokens int64` Total output tokens generated across all turns. ### Beta Managed Agents Stream Session Thread Events - `type BetaManagedAgentsStreamSessionThreadEventsUnion interface{…}` Server-sent event in a single thread's stream. - `type BetaManagedAgentsUserMessageEvent struct{…}` A user message event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsUserMessageEventContentUnion` Array of content blocks comprising the user message. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `Type BetaManagedAgentsUserMessageEventType` - `const BetaManagedAgentsUserMessageEventTypeUserMessage BetaManagedAgentsUserMessageEventType = "user.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsUserInterruptEvent struct{…}` An interrupt event that pauses agent execution and returns control to the user. - `ID string` Unique identifier for this event. - `Type BetaManagedAgentsUserInterruptEventType` - `const BetaManagedAgentsUserInterruptEventTypeUserInterrupt BetaManagedAgentsUserInterruptEventType = "user.interrupt"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` If absent, interrupts every non-archived thread in a multiagent session (or the primary alone in a single-agent session). If present, interrupts only the named thread. - `type BetaManagedAgentsUserToolConfirmationEvent struct{…}` A tool confirmation event that approves or denies a pending tool execution. - `ID string` Unique identifier for this event. - `Result BetaManagedAgentsUserToolConfirmationEventResult` UserToolConfirmationResult enum - `const BetaManagedAgentsUserToolConfirmationEventResultAllow BetaManagedAgentsUserToolConfirmationEventResult = "allow"` - `const BetaManagedAgentsUserToolConfirmationEventResultDeny BetaManagedAgentsUserToolConfirmationEventResult = "deny"` - `ToolUseID string` The id of the `agent.tool_use` or `agent.mcp_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolConfirmationEventType` - `const BetaManagedAgentsUserToolConfirmationEventTypeUserToolConfirmation BetaManagedAgentsUserToolConfirmationEventType = "user.tool_confirmation"` - `DenyMessage string` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` When set, the confirmation routes to this subagent's thread rather than the primary. Echo this from the `session_thread_id` on the `agent.tool_use` or `agent.mcp_tool_use` event that prompted the approval. - `type BetaManagedAgentsUserCustomToolResultEvent struct{…}` Event sent by the client providing the result of a custom tool execution. - `ID string` Unique identifier for this event. - `CustomToolUseID string` The id of the `agent.custom_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserCustomToolResultEventType` - `const BetaManagedAgentsUserCustomToolResultEventTypeUserCustomToolResult BetaManagedAgentsUserCustomToolResultEventType = "user.custom_tool_result"` - `Content []BetaManagedAgentsUserCustomToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `type BetaManagedAgentsAgentCustomToolUseEvent struct{…}` Event emitted when the agent calls a custom tool. The session goes idle until the client sends a `user.custom_tool_result` event with the result. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `Name string` Name of the custom tool being called. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentCustomToolUseEventType` - `const BetaManagedAgentsAgentCustomToolUseEventTypeAgentCustomToolUse BetaManagedAgentsAgentCustomToolUseEventType = "agent.custom_tool_use"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its custom tool use on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.custom_tool_result` event to route the result back. - `type BetaManagedAgentsAgentMessageEvent struct{…}` An agent response event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsTextBlock` Array of text blocks comprising the agent response. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMessageEventType` - `const BetaManagedAgentsAgentMessageEventTypeAgentMessage BetaManagedAgentsAgentMessageEventType = "agent.message"` - `type BetaManagedAgentsAgentThinkingEvent struct{…}` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThinkingEventType` - `const BetaManagedAgentsAgentThinkingEventTypeAgentThinking BetaManagedAgentsAgentThinkingEventType = "agent.thinking"` - `type BetaManagedAgentsAgentMCPToolUseEvent struct{…}` Event emitted when the agent invokes a tool provided by an MCP server. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `MCPServerName string` Name of the MCP server providing the tool. - `Name string` Name of the MCP tool being used. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMCPToolUseEventType` - `const BetaManagedAgentsAgentMCPToolUseEventTypeAgentMCPToolUse BetaManagedAgentsAgentMCPToolUseEventType = "agent.mcp_tool_use"` - `EvaluatedPermission BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission` AgentEvaluatedPermission enum - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionAllow BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "allow"` - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionAsk BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "ask"` - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionDeny BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "deny"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.tool_confirmation` event to route the approval back. - `type BetaManagedAgentsAgentMCPToolResultEvent struct{…}` Event representing the result of an MCP tool execution. - `ID string` Unique identifier for this event. - `MCPToolUseID string` The id of the `agent.mcp_tool_use` event this result corresponds to. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMCPToolResultEventType` - `const BetaManagedAgentsAgentMCPToolResultEventTypeAgentMCPToolResult BetaManagedAgentsAgentMCPToolResultEventType = "agent.mcp_tool_result"` - `Content []BetaManagedAgentsAgentMCPToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsAgentToolUseEvent struct{…}` Event emitted when the agent invokes a built-in agent tool. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `Name string` Name of the agent tool being used. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentToolUseEventType` - `const BetaManagedAgentsAgentToolUseEventTypeAgentToolUse BetaManagedAgentsAgentToolUseEventType = "agent.tool_use"` - `EvaluatedPermission BetaManagedAgentsAgentToolUseEventEvaluatedPermission` AgentEvaluatedPermission enum - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionAllow BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "allow"` - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionAsk BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "ask"` - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionDeny BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "deny"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.tool_confirmation` event to route the approval back. - `type BetaManagedAgentsAgentToolResultEvent struct{…}` Event representing the result of an agent tool execution. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to. - `Type BetaManagedAgentsAgentToolResultEventType` - `const BetaManagedAgentsAgentToolResultEventTypeAgentToolResult BetaManagedAgentsAgentToolResultEventType = "agent.tool_result"` - `Content []BetaManagedAgentsAgentToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsAgentThreadMessageReceivedEvent struct{…}` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsAgentThreadMessageReceivedEventContentUnion` Message content blocks. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `FromSessionThreadID string` Public `sthr_` ID of the thread that sent the message. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThreadMessageReceivedEventType` - `const BetaManagedAgentsAgentThreadMessageReceivedEventTypeAgentThreadMessageReceived BetaManagedAgentsAgentThreadMessageReceivedEventType = "agent.thread_message_received"` - `FromAgentName string` Name of the callable agent this message came from. Absent when received from the primary agent. - `type BetaManagedAgentsAgentThreadMessageSentEvent struct{…}` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsAgentThreadMessageSentEventContentUnion` Message content blocks. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `ProcessedAt Time` A timestamp in RFC 3339 format - `ToSessionThreadID string` Public `sthr_` ID of the thread the message was sent to. - `Type BetaManagedAgentsAgentThreadMessageSentEventType` - `const BetaManagedAgentsAgentThreadMessageSentEventTypeAgentThreadMessageSent BetaManagedAgentsAgentThreadMessageSentEventType = "agent.thread_message_sent"` - `ToAgentName string` Name of the callable agent this message was sent to. Absent when sent to the primary agent. - `type BetaManagedAgentsAgentThreadContextCompactedEvent struct{…}` Indicates that context compaction (summarization) occurred during the session. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThreadContextCompactedEventType` - `const BetaManagedAgentsAgentThreadContextCompactedEventTypeAgentThreadContextCompacted BetaManagedAgentsAgentThreadContextCompactedEventType = "agent.thread_context_compacted"` - `type BetaManagedAgentsSessionErrorEvent struct{…}` An error event indicating a problem occurred during session execution. - `ID string` Unique identifier for this event. - `Error BetaManagedAgentsSessionErrorEventErrorUnion` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `type BetaManagedAgentsUnknownError struct{…}` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsUnknownErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` - `Type BetaManagedAgentsUnknownErrorType` - `const BetaManagedAgentsUnknownErrorTypeUnknownError BetaManagedAgentsUnknownErrorType = "unknown_error"` - `type BetaManagedAgentsModelOverloadedError struct{…}` The model is currently overloaded. Emitted after automatic retries are exhausted. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelOverloadedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelOverloadedErrorType` - `const BetaManagedAgentsModelOverloadedErrorTypeModelOverloadedError BetaManagedAgentsModelOverloadedErrorType = "model_overloaded_error"` - `type BetaManagedAgentsModelRateLimitedError struct{…}` The model request was rate-limited. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRateLimitedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelRateLimitedErrorType` - `const BetaManagedAgentsModelRateLimitedErrorTypeModelRateLimitedError BetaManagedAgentsModelRateLimitedErrorType = "model_rate_limited_error"` - `type BetaManagedAgentsModelRequestFailedError struct{…}` A model request failed for a reason other than overload or rate-limiting. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRequestFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelRequestFailedErrorType` - `const BetaManagedAgentsModelRequestFailedErrorTypeModelRequestFailedError BetaManagedAgentsModelRequestFailedErrorType = "model_request_failed_error"` - `type BetaManagedAgentsMCPConnectionFailedError struct{…}` Failed to connect to an MCP server. - `MCPServerName string` Name of the MCP server that failed to connect. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPConnectionFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsMCPConnectionFailedErrorType` - `const BetaManagedAgentsMCPConnectionFailedErrorTypeMCPConnectionFailedError BetaManagedAgentsMCPConnectionFailedErrorType = "mcp_connection_failed_error"` - `type BetaManagedAgentsMCPAuthenticationFailedError struct{…}` Authentication to an MCP server failed. - `MCPServerName string` Name of the MCP server that failed authentication. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPAuthenticationFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsMCPAuthenticationFailedErrorType` - `const BetaManagedAgentsMCPAuthenticationFailedErrorTypeMCPAuthenticationFailedError BetaManagedAgentsMCPAuthenticationFailedErrorType = "mcp_authentication_failed_error"` - `type BetaManagedAgentsBillingError struct{…}` The caller's organization or workspace cannot make model requests — out of credits or spend limit reached. Retrying with the same credentials will not succeed; the caller must resolve the billing state. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsBillingErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsBillingErrorType` - `const BetaManagedAgentsBillingErrorTypeBillingError BetaManagedAgentsBillingErrorType = "billing_error"` - `type BetaManagedAgentsCredentialHostUnreachableError struct{…}` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `CredentialID string` ID of the affected credential. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsCredentialHostUnreachableErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsCredentialHostUnreachableErrorType` - `const BetaManagedAgentsCredentialHostUnreachableErrorTypeCredentialHostUnreachableError BetaManagedAgentsCredentialHostUnreachableErrorType = "credential_host_unreachable_error"` - `VaultID string` ID of the vault containing the affected credential. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionErrorEventType` - `const BetaManagedAgentsSessionErrorEventTypeSessionError BetaManagedAgentsSessionErrorEventType = "session.error"` - `type BetaManagedAgentsSessionStatusRescheduledEvent struct{…}` Indicates the session is recovering from an error state and is rescheduled for execution. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusRescheduledEventType` - `const BetaManagedAgentsSessionStatusRescheduledEventTypeSessionStatusRescheduled BetaManagedAgentsSessionStatusRescheduledEventType = "session.status_rescheduled"` - `type BetaManagedAgentsSessionStatusRunningEvent struct{…}` Indicates the session is actively running and the agent is working. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusRunningEventType` - `const BetaManagedAgentsSessionStatusRunningEventTypeSessionStatusRunning BetaManagedAgentsSessionStatusRunningEventType = "session.status_running"` - `type BetaManagedAgentsSessionStatusIdleEvent struct{…}` Indicates the agent has paused and is awaiting user input. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `StopReason BetaManagedAgentsSessionStatusIdleEventStopReasonUnion` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `Type BetaManagedAgentsSessionEndTurnType` - `const BetaManagedAgentsSessionEndTurnTypeEndTurn BetaManagedAgentsSessionEndTurnType = "end_turn"` - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `EventIDs []string` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type BetaManagedAgentsSessionRequiresActionType` - `const BetaManagedAgentsSessionRequiresActionTypeRequiresAction BetaManagedAgentsSessionRequiresActionType = "requires_action"` - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionRetriesExhaustedType` - `const BetaManagedAgentsSessionRetriesExhaustedTypeRetriesExhausted BetaManagedAgentsSessionRetriesExhaustedType = "retries_exhausted"` - `Type BetaManagedAgentsSessionStatusIdleEventType` - `const BetaManagedAgentsSessionStatusIdleEventTypeSessionStatusIdle BetaManagedAgentsSessionStatusIdleEventType = "session.status_idle"` - `type BetaManagedAgentsSessionStatusTerminatedEvent struct{…}` Indicates the session has terminated, either due to an error or completion. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusTerminatedEventType` - `const BetaManagedAgentsSessionStatusTerminatedEventTypeSessionStatusTerminated BetaManagedAgentsSessionStatusTerminatedEventType = "session.status_terminated"` - `type BetaManagedAgentsSessionThreadCreatedEvent struct{…}` Emitted when a subagent is spawned as a new thread. Written to the parent thread's output stream so clients observing the session see child creation. - `ID string` Unique identifier for this event. - `AgentName string` Name of the callable agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public `sthr_` ID of the newly created thread. - `Type BetaManagedAgentsSessionThreadCreatedEventType` - `const BetaManagedAgentsSessionThreadCreatedEventTypeSessionThreadCreated BetaManagedAgentsSessionThreadCreatedEventType = "session.thread_created"` - `type BetaManagedAgentsSpanOutcomeEvaluationStartEvent struct{…}` Emitted when an outcome evaluation cycle begins. - `ID string` Unique identifier for this event. - `Iteration int64` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanOutcomeEvaluationStartEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationStartEventTypeSpanOutcomeEvaluationStart BetaManagedAgentsSpanOutcomeEvaluationStartEventType = "span.outcome_evaluation_start"` - `type BetaManagedAgentsSpanOutcomeEvaluationEndEvent struct{…}` Emitted when an outcome evaluation cycle completes. Carries the verdict and aggregate token usage. A verdict of `needs_revision` means another evaluation cycle follows; `satisfied`, `max_iterations_reached`, `failed`, or `interrupted` are terminal — no further evaluation cycles follow. - `ID string` Unique identifier for this event. - `Explanation string` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `Iteration int64` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `OutcomeEvaluationStartID string` The id of the corresponding `span.outcome_evaluation_start` event. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Result string` Evaluation verdict. 'satisfied': criteria met, session goes idle. 'needs_revision': criteria not met, another revision cycle follows. 'max_iterations_reached': evaluation budget exhausted with criteria still unmet — one final acknowledgment turn follows before the session goes idle, but no further evaluation runs. 'failed': grader determined the rubric does not apply to the deliverables. 'interrupted': user sent an interrupt while evaluation was in progress. - `Type BetaManagedAgentsSpanOutcomeEvaluationEndEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationEndEventTypeSpanOutcomeEvaluationEnd BetaManagedAgentsSpanOutcomeEvaluationEndEventType = "span.outcome_evaluation_end"` - `Usage BetaManagedAgentsSpanModelUsage` Token usage for a single model request. - `CacheCreationInputTokens int64` Tokens used to create prompt cache in this request. - `CacheReadInputTokens int64` Tokens read from prompt cache in this request. - `InputTokens int64` Input tokens consumed by this request. - `OutputTokens int64` Output tokens generated by this request. - `Speed BetaManagedAgentsSpanModelUsageSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsSpanModelUsageSpeedStandard BetaManagedAgentsSpanModelUsageSpeed = "standard"` - `const BetaManagedAgentsSpanModelUsageSpeedFast BetaManagedAgentsSpanModelUsageSpeed = "fast"` - `type BetaManagedAgentsSpanModelRequestStartEvent struct{…}` Emitted when a model request is initiated by the agent. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanModelRequestStartEventType` - `const BetaManagedAgentsSpanModelRequestStartEventTypeSpanModelRequestStart BetaManagedAgentsSpanModelRequestStartEventType = "span.model_request_start"` - `type BetaManagedAgentsSpanModelRequestEndEvent struct{…}` Emitted when a model request completes. - `ID string` Unique identifier for this event. - `IsError bool` Whether the model request resulted in an error. - `ModelRequestStartID string` The id of the corresponding `span.model_request_start` event. - `ModelUsage BetaManagedAgentsSpanModelUsage` Token usage for a single model request. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanModelRequestEndEventType` - `const BetaManagedAgentsSpanModelRequestEndEventTypeSpanModelRequestEnd BetaManagedAgentsSpanModelRequestEndEventType = "span.model_request_end"` - `type BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent struct{…}` Periodic heartbeat emitted while an outcome evaluation cycle is in progress. Distinguishes 'evaluation is actively running' from 'evaluation is stuck' between the corresponding `span.outcome_evaluation_start` and `span.outcome_evaluation_end` events. - `ID string` Unique identifier for this event. - `Iteration int64` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanOutcomeEvaluationOngoingEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationOngoingEventTypeSpanOutcomeEvaluationOngoing BetaManagedAgentsSpanOutcomeEvaluationOngoingEventType = "span.outcome_evaluation_ongoing"` - `type BetaManagedAgentsUserDefineOutcomeEvent struct{…}` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `ID string` Unique identifier for this event. - `Description string` What the agent should produce. Copied from the input event. - `MaxIterations int64` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `OutcomeID string` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Rubric BetaManagedAgentsUserDefineOutcomeEventRubricUnion` Rubric for grading the quality of an outcome. - `type BetaManagedAgentsFileRubric struct{…}` Rubric referenced by a file uploaded via the Files API. - `FileID string` ID of the rubric file. - `Type BetaManagedAgentsFileRubricType` - `const BetaManagedAgentsFileRubricTypeFile BetaManagedAgentsFileRubricType = "file"` - `type BetaManagedAgentsTextRubric struct{…}` Rubric content provided inline as text. - `Content string` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type BetaManagedAgentsTextRubricType` - `const BetaManagedAgentsTextRubricTypeText BetaManagedAgentsTextRubricType = "text"` - `Type BetaManagedAgentsUserDefineOutcomeEventType` - `const BetaManagedAgentsUserDefineOutcomeEventTypeUserDefineOutcome BetaManagedAgentsUserDefineOutcomeEventType = "user.define_outcome"` - `type BetaManagedAgentsSessionDeletedEvent struct{…}` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionDeletedEventType` - `const BetaManagedAgentsSessionDeletedEventTypeSessionDeleted BetaManagedAgentsSessionDeletedEventType = "session.deleted"` - `type BetaManagedAgentsSessionThreadStatusRunningEvent struct{…}` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that started running. - `Type BetaManagedAgentsSessionThreadStatusRunningEventType` - `const BetaManagedAgentsSessionThreadStatusRunningEventTypeSessionThreadStatusRunning BetaManagedAgentsSessionThreadStatusRunningEventType = "session.thread_status_running"` - `type BetaManagedAgentsSessionThreadStatusIdleEvent struct{…}` A session thread has yielded and is awaiting input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that went idle. - `StopReason BetaManagedAgentsSessionThreadStatusIdleEventStopReasonUnion` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionThreadStatusIdleEventType` - `const BetaManagedAgentsSessionThreadStatusIdleEventTypeSessionThreadStatusIdle BetaManagedAgentsSessionThreadStatusIdleEventType = "session.thread_status_idle"` - `type BetaManagedAgentsSessionThreadStatusTerminatedEvent struct{…}` A session thread has terminated and will accept no further input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that terminated. - `Type BetaManagedAgentsSessionThreadStatusTerminatedEventType` - `const BetaManagedAgentsSessionThreadStatusTerminatedEventTypeSessionThreadStatusTerminated BetaManagedAgentsSessionThreadStatusTerminatedEventType = "session.thread_status_terminated"` - `type BetaManagedAgentsUserToolResultEvent struct{…}` Event sent by the client providing the result of an agent-toolset tool execution. Only valid on `self_hosted` environments, where sandbox-routed tools are executed by the client rather than the server. - `ID string` Unique identifier for this event. - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolResultEventType` - `const BetaManagedAgentsUserToolResultEventTypeUserToolResult BetaManagedAgentsUserToolResultEventType = "user.tool_result"` - `Content []BetaManagedAgentsUserToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `type BetaManagedAgentsSessionThreadStatusRescheduledEvent struct{…}` A session thread hit a transient error and is retrying automatically. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that is retrying. - `Type BetaManagedAgentsSessionThreadStatusRescheduledEventType` - `const BetaManagedAgentsSessionThreadStatusRescheduledEventTypeSessionThreadStatusRescheduled BetaManagedAgentsSessionThreadStatusRescheduledEventType = "session.thread_status_rescheduled"` - `type BetaManagedAgentsSessionUpdatedEvent struct{…}` Emitted when an UpdateSession request changed at least one field. Carries only the fields that changed; absent fields were not part of the update. The new configuration applies from the next turn. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionUpdatedEventType` - `const BetaManagedAgentsSessionUpdatedEventTypeSessionUpdated BetaManagedAgentsSessionUpdatedEventType = "session.updated"` - `Agent BetaManagedAgentsSessionAgent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Multiagent BetaManagedAgentsSessionMultiagentCoordinator` Resolved coordinator topology with full agent definitions for each roster member. - `Agents []BetaManagedAgentsSessionThreadAgent` Full `agent` definitions the coordinator may spawn as session threads. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `Type BetaManagedAgentsSessionMultiagentCoordinatorType` - `const BetaManagedAgentsSessionMultiagentCoordinatorTypeCoordinator BetaManagedAgentsSessionMultiagentCoordinatorType = "coordinator"` - `Name string` - `Skills []BetaManagedAgentsSessionAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `System string` - `Tools []BetaManagedAgentsSessionAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `type BetaManagedAgentsMCPToolset struct{…}` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Type BetaManagedAgentsSessionAgentType` - `const BetaManagedAgentsSessionAgentTypeAgent BetaManagedAgentsSessionAgentType = "agent"` - `Version int64` - `Metadata map[string, string]` The session's full metadata bag after the update. Present when the update set non-empty metadata; absent when metadata was unchanged or cleared to empty. - `Title string` The session's new title. Present only when the update changed it. - `type BetaManagedAgentsSystemMessageEvent struct{…}` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsSystemContentBlock` System content blocks. Text-only. - `Text string` The text content. - `Type BetaManagedAgentsSystemContentBlockType` - `const BetaManagedAgentsSystemContentBlockTypeText BetaManagedAgentsSystemContentBlockType = "text"` - `Type BetaManagedAgentsSystemMessageEventType` - `const BetaManagedAgentsSystemMessageEventTypeSystemMessage BetaManagedAgentsSystemMessageEventType = "system.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format # Events ## List Session Thread Events `client.Beta.Sessions.Threads.Events.List(ctx, threadID, params) (*PageCursor[BetaManagedAgentsSessionEventUnion], error)` **get** `/v1/sessions/{session_id}/threads/{thread_id}/events` List Session Thread Events ### Parameters - `threadID string` - `params BetaSessionThreadEventListParams` - `SessionID param.Field[string]` Path param: Path parameter session_id - `Limit param.Field[int64]` Query param: Query parameter for limit - `Page param.Field[string]` Query param: Query parameter for page - `Betas param.Field[[]AnthropicBeta]` Header param: Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsSessionEventUnion interface{…}` Union type for all event types in a session. - `type BetaManagedAgentsUserMessageEvent struct{…}` A user message event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsUserMessageEventContentUnion` Array of content blocks comprising the user message. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `Type BetaManagedAgentsUserMessageEventType` - `const BetaManagedAgentsUserMessageEventTypeUserMessage BetaManagedAgentsUserMessageEventType = "user.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsUserInterruptEvent struct{…}` An interrupt event that pauses agent execution and returns control to the user. - `ID string` Unique identifier for this event. - `Type BetaManagedAgentsUserInterruptEventType` - `const BetaManagedAgentsUserInterruptEventTypeUserInterrupt BetaManagedAgentsUserInterruptEventType = "user.interrupt"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` If absent, interrupts every non-archived thread in a multiagent session (or the primary alone in a single-agent session). If present, interrupts only the named thread. - `type BetaManagedAgentsUserToolConfirmationEvent struct{…}` A tool confirmation event that approves or denies a pending tool execution. - `ID string` Unique identifier for this event. - `Result BetaManagedAgentsUserToolConfirmationEventResult` UserToolConfirmationResult enum - `const BetaManagedAgentsUserToolConfirmationEventResultAllow BetaManagedAgentsUserToolConfirmationEventResult = "allow"` - `const BetaManagedAgentsUserToolConfirmationEventResultDeny BetaManagedAgentsUserToolConfirmationEventResult = "deny"` - `ToolUseID string` The id of the `agent.tool_use` or `agent.mcp_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolConfirmationEventType` - `const BetaManagedAgentsUserToolConfirmationEventTypeUserToolConfirmation BetaManagedAgentsUserToolConfirmationEventType = "user.tool_confirmation"` - `DenyMessage string` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` When set, the confirmation routes to this subagent's thread rather than the primary. Echo this from the `session_thread_id` on the `agent.tool_use` or `agent.mcp_tool_use` event that prompted the approval. - `type BetaManagedAgentsUserCustomToolResultEvent struct{…}` Event sent by the client providing the result of a custom tool execution. - `ID string` Unique identifier for this event. - `CustomToolUseID string` The id of the `agent.custom_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserCustomToolResultEventType` - `const BetaManagedAgentsUserCustomToolResultEventTypeUserCustomToolResult BetaManagedAgentsUserCustomToolResultEventType = "user.custom_tool_result"` - `Content []BetaManagedAgentsUserCustomToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `type BetaManagedAgentsAgentCustomToolUseEvent struct{…}` Event emitted when the agent calls a custom tool. The session goes idle until the client sends a `user.custom_tool_result` event with the result. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `Name string` Name of the custom tool being called. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentCustomToolUseEventType` - `const BetaManagedAgentsAgentCustomToolUseEventTypeAgentCustomToolUse BetaManagedAgentsAgentCustomToolUseEventType = "agent.custom_tool_use"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its custom tool use on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.custom_tool_result` event to route the result back. - `type BetaManagedAgentsAgentMessageEvent struct{…}` An agent response event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsTextBlock` Array of text blocks comprising the agent response. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMessageEventType` - `const BetaManagedAgentsAgentMessageEventTypeAgentMessage BetaManagedAgentsAgentMessageEventType = "agent.message"` - `type BetaManagedAgentsAgentThinkingEvent struct{…}` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThinkingEventType` - `const BetaManagedAgentsAgentThinkingEventTypeAgentThinking BetaManagedAgentsAgentThinkingEventType = "agent.thinking"` - `type BetaManagedAgentsAgentMCPToolUseEvent struct{…}` Event emitted when the agent invokes a tool provided by an MCP server. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `MCPServerName string` Name of the MCP server providing the tool. - `Name string` Name of the MCP tool being used. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMCPToolUseEventType` - `const BetaManagedAgentsAgentMCPToolUseEventTypeAgentMCPToolUse BetaManagedAgentsAgentMCPToolUseEventType = "agent.mcp_tool_use"` - `EvaluatedPermission BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission` AgentEvaluatedPermission enum - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionAllow BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "allow"` - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionAsk BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "ask"` - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionDeny BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "deny"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.tool_confirmation` event to route the approval back. - `type BetaManagedAgentsAgentMCPToolResultEvent struct{…}` Event representing the result of an MCP tool execution. - `ID string` Unique identifier for this event. - `MCPToolUseID string` The id of the `agent.mcp_tool_use` event this result corresponds to. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMCPToolResultEventType` - `const BetaManagedAgentsAgentMCPToolResultEventTypeAgentMCPToolResult BetaManagedAgentsAgentMCPToolResultEventType = "agent.mcp_tool_result"` - `Content []BetaManagedAgentsAgentMCPToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsAgentToolUseEvent struct{…}` Event emitted when the agent invokes a built-in agent tool. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `Name string` Name of the agent tool being used. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentToolUseEventType` - `const BetaManagedAgentsAgentToolUseEventTypeAgentToolUse BetaManagedAgentsAgentToolUseEventType = "agent.tool_use"` - `EvaluatedPermission BetaManagedAgentsAgentToolUseEventEvaluatedPermission` AgentEvaluatedPermission enum - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionAllow BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "allow"` - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionAsk BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "ask"` - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionDeny BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "deny"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.tool_confirmation` event to route the approval back. - `type BetaManagedAgentsAgentToolResultEvent struct{…}` Event representing the result of an agent tool execution. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to. - `Type BetaManagedAgentsAgentToolResultEventType` - `const BetaManagedAgentsAgentToolResultEventTypeAgentToolResult BetaManagedAgentsAgentToolResultEventType = "agent.tool_result"` - `Content []BetaManagedAgentsAgentToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsAgentThreadMessageReceivedEvent struct{…}` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsAgentThreadMessageReceivedEventContentUnion` Message content blocks. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `FromSessionThreadID string` Public `sthr_` ID of the thread that sent the message. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThreadMessageReceivedEventType` - `const BetaManagedAgentsAgentThreadMessageReceivedEventTypeAgentThreadMessageReceived BetaManagedAgentsAgentThreadMessageReceivedEventType = "agent.thread_message_received"` - `FromAgentName string` Name of the callable agent this message came from. Absent when received from the primary agent. - `type BetaManagedAgentsAgentThreadMessageSentEvent struct{…}` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsAgentThreadMessageSentEventContentUnion` Message content blocks. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `ProcessedAt Time` A timestamp in RFC 3339 format - `ToSessionThreadID string` Public `sthr_` ID of the thread the message was sent to. - `Type BetaManagedAgentsAgentThreadMessageSentEventType` - `const BetaManagedAgentsAgentThreadMessageSentEventTypeAgentThreadMessageSent BetaManagedAgentsAgentThreadMessageSentEventType = "agent.thread_message_sent"` - `ToAgentName string` Name of the callable agent this message was sent to. Absent when sent to the primary agent. - `type BetaManagedAgentsAgentThreadContextCompactedEvent struct{…}` Indicates that context compaction (summarization) occurred during the session. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThreadContextCompactedEventType` - `const BetaManagedAgentsAgentThreadContextCompactedEventTypeAgentThreadContextCompacted BetaManagedAgentsAgentThreadContextCompactedEventType = "agent.thread_context_compacted"` - `type BetaManagedAgentsSessionErrorEvent struct{…}` An error event indicating a problem occurred during session execution. - `ID string` Unique identifier for this event. - `Error BetaManagedAgentsSessionErrorEventErrorUnion` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `type BetaManagedAgentsUnknownError struct{…}` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsUnknownErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` - `Type BetaManagedAgentsUnknownErrorType` - `const BetaManagedAgentsUnknownErrorTypeUnknownError BetaManagedAgentsUnknownErrorType = "unknown_error"` - `type BetaManagedAgentsModelOverloadedError struct{…}` The model is currently overloaded. Emitted after automatic retries are exhausted. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelOverloadedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelOverloadedErrorType` - `const BetaManagedAgentsModelOverloadedErrorTypeModelOverloadedError BetaManagedAgentsModelOverloadedErrorType = "model_overloaded_error"` - `type BetaManagedAgentsModelRateLimitedError struct{…}` The model request was rate-limited. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRateLimitedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelRateLimitedErrorType` - `const BetaManagedAgentsModelRateLimitedErrorTypeModelRateLimitedError BetaManagedAgentsModelRateLimitedErrorType = "model_rate_limited_error"` - `type BetaManagedAgentsModelRequestFailedError struct{…}` A model request failed for a reason other than overload or rate-limiting. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRequestFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelRequestFailedErrorType` - `const BetaManagedAgentsModelRequestFailedErrorTypeModelRequestFailedError BetaManagedAgentsModelRequestFailedErrorType = "model_request_failed_error"` - `type BetaManagedAgentsMCPConnectionFailedError struct{…}` Failed to connect to an MCP server. - `MCPServerName string` Name of the MCP server that failed to connect. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPConnectionFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsMCPConnectionFailedErrorType` - `const BetaManagedAgentsMCPConnectionFailedErrorTypeMCPConnectionFailedError BetaManagedAgentsMCPConnectionFailedErrorType = "mcp_connection_failed_error"` - `type BetaManagedAgentsMCPAuthenticationFailedError struct{…}` Authentication to an MCP server failed. - `MCPServerName string` Name of the MCP server that failed authentication. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPAuthenticationFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsMCPAuthenticationFailedErrorType` - `const BetaManagedAgentsMCPAuthenticationFailedErrorTypeMCPAuthenticationFailedError BetaManagedAgentsMCPAuthenticationFailedErrorType = "mcp_authentication_failed_error"` - `type BetaManagedAgentsBillingError struct{…}` The caller's organization or workspace cannot make model requests — out of credits or spend limit reached. Retrying with the same credentials will not succeed; the caller must resolve the billing state. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsBillingErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsBillingErrorType` - `const BetaManagedAgentsBillingErrorTypeBillingError BetaManagedAgentsBillingErrorType = "billing_error"` - `type BetaManagedAgentsCredentialHostUnreachableError struct{…}` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `CredentialID string` ID of the affected credential. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsCredentialHostUnreachableErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsCredentialHostUnreachableErrorType` - `const BetaManagedAgentsCredentialHostUnreachableErrorTypeCredentialHostUnreachableError BetaManagedAgentsCredentialHostUnreachableErrorType = "credential_host_unreachable_error"` - `VaultID string` ID of the vault containing the affected credential. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionErrorEventType` - `const BetaManagedAgentsSessionErrorEventTypeSessionError BetaManagedAgentsSessionErrorEventType = "session.error"` - `type BetaManagedAgentsSessionStatusRescheduledEvent struct{…}` Indicates the session is recovering from an error state and is rescheduled for execution. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusRescheduledEventType` - `const BetaManagedAgentsSessionStatusRescheduledEventTypeSessionStatusRescheduled BetaManagedAgentsSessionStatusRescheduledEventType = "session.status_rescheduled"` - `type BetaManagedAgentsSessionStatusRunningEvent struct{…}` Indicates the session is actively running and the agent is working. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusRunningEventType` - `const BetaManagedAgentsSessionStatusRunningEventTypeSessionStatusRunning BetaManagedAgentsSessionStatusRunningEventType = "session.status_running"` - `type BetaManagedAgentsSessionStatusIdleEvent struct{…}` Indicates the agent has paused and is awaiting user input. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `StopReason BetaManagedAgentsSessionStatusIdleEventStopReasonUnion` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `Type BetaManagedAgentsSessionEndTurnType` - `const BetaManagedAgentsSessionEndTurnTypeEndTurn BetaManagedAgentsSessionEndTurnType = "end_turn"` - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `EventIDs []string` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type BetaManagedAgentsSessionRequiresActionType` - `const BetaManagedAgentsSessionRequiresActionTypeRequiresAction BetaManagedAgentsSessionRequiresActionType = "requires_action"` - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionRetriesExhaustedType` - `const BetaManagedAgentsSessionRetriesExhaustedTypeRetriesExhausted BetaManagedAgentsSessionRetriesExhaustedType = "retries_exhausted"` - `Type BetaManagedAgentsSessionStatusIdleEventType` - `const BetaManagedAgentsSessionStatusIdleEventTypeSessionStatusIdle BetaManagedAgentsSessionStatusIdleEventType = "session.status_idle"` - `type BetaManagedAgentsSessionStatusTerminatedEvent struct{…}` Indicates the session has terminated, either due to an error or completion. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusTerminatedEventType` - `const BetaManagedAgentsSessionStatusTerminatedEventTypeSessionStatusTerminated BetaManagedAgentsSessionStatusTerminatedEventType = "session.status_terminated"` - `type BetaManagedAgentsSessionThreadCreatedEvent struct{…}` Emitted when a subagent is spawned as a new thread. Written to the parent thread's output stream so clients observing the session see child creation. - `ID string` Unique identifier for this event. - `AgentName string` Name of the callable agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public `sthr_` ID of the newly created thread. - `Type BetaManagedAgentsSessionThreadCreatedEventType` - `const BetaManagedAgentsSessionThreadCreatedEventTypeSessionThreadCreated BetaManagedAgentsSessionThreadCreatedEventType = "session.thread_created"` - `type BetaManagedAgentsSpanOutcomeEvaluationStartEvent struct{…}` Emitted when an outcome evaluation cycle begins. - `ID string` Unique identifier for this event. - `Iteration int64` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanOutcomeEvaluationStartEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationStartEventTypeSpanOutcomeEvaluationStart BetaManagedAgentsSpanOutcomeEvaluationStartEventType = "span.outcome_evaluation_start"` - `type BetaManagedAgentsSpanOutcomeEvaluationEndEvent struct{…}` Emitted when an outcome evaluation cycle completes. Carries the verdict and aggregate token usage. A verdict of `needs_revision` means another evaluation cycle follows; `satisfied`, `max_iterations_reached`, `failed`, or `interrupted` are terminal — no further evaluation cycles follow. - `ID string` Unique identifier for this event. - `Explanation string` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `Iteration int64` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `OutcomeEvaluationStartID string` The id of the corresponding `span.outcome_evaluation_start` event. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Result string` Evaluation verdict. 'satisfied': criteria met, session goes idle. 'needs_revision': criteria not met, another revision cycle follows. 'max_iterations_reached': evaluation budget exhausted with criteria still unmet — one final acknowledgment turn follows before the session goes idle, but no further evaluation runs. 'failed': grader determined the rubric does not apply to the deliverables. 'interrupted': user sent an interrupt while evaluation was in progress. - `Type BetaManagedAgentsSpanOutcomeEvaluationEndEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationEndEventTypeSpanOutcomeEvaluationEnd BetaManagedAgentsSpanOutcomeEvaluationEndEventType = "span.outcome_evaluation_end"` - `Usage BetaManagedAgentsSpanModelUsage` Token usage for a single model request. - `CacheCreationInputTokens int64` Tokens used to create prompt cache in this request. - `CacheReadInputTokens int64` Tokens read from prompt cache in this request. - `InputTokens int64` Input tokens consumed by this request. - `OutputTokens int64` Output tokens generated by this request. - `Speed BetaManagedAgentsSpanModelUsageSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsSpanModelUsageSpeedStandard BetaManagedAgentsSpanModelUsageSpeed = "standard"` - `const BetaManagedAgentsSpanModelUsageSpeedFast BetaManagedAgentsSpanModelUsageSpeed = "fast"` - `type BetaManagedAgentsSpanModelRequestStartEvent struct{…}` Emitted when a model request is initiated by the agent. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanModelRequestStartEventType` - `const BetaManagedAgentsSpanModelRequestStartEventTypeSpanModelRequestStart BetaManagedAgentsSpanModelRequestStartEventType = "span.model_request_start"` - `type BetaManagedAgentsSpanModelRequestEndEvent struct{…}` Emitted when a model request completes. - `ID string` Unique identifier for this event. - `IsError bool` Whether the model request resulted in an error. - `ModelRequestStartID string` The id of the corresponding `span.model_request_start` event. - `ModelUsage BetaManagedAgentsSpanModelUsage` Token usage for a single model request. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanModelRequestEndEventType` - `const BetaManagedAgentsSpanModelRequestEndEventTypeSpanModelRequestEnd BetaManagedAgentsSpanModelRequestEndEventType = "span.model_request_end"` - `type BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent struct{…}` Periodic heartbeat emitted while an outcome evaluation cycle is in progress. Distinguishes 'evaluation is actively running' from 'evaluation is stuck' between the corresponding `span.outcome_evaluation_start` and `span.outcome_evaluation_end` events. - `ID string` Unique identifier for this event. - `Iteration int64` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanOutcomeEvaluationOngoingEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationOngoingEventTypeSpanOutcomeEvaluationOngoing BetaManagedAgentsSpanOutcomeEvaluationOngoingEventType = "span.outcome_evaluation_ongoing"` - `type BetaManagedAgentsUserDefineOutcomeEvent struct{…}` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `ID string` Unique identifier for this event. - `Description string` What the agent should produce. Copied from the input event. - `MaxIterations int64` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `OutcomeID string` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Rubric BetaManagedAgentsUserDefineOutcomeEventRubricUnion` Rubric for grading the quality of an outcome. - `type BetaManagedAgentsFileRubric struct{…}` Rubric referenced by a file uploaded via the Files API. - `FileID string` ID of the rubric file. - `Type BetaManagedAgentsFileRubricType` - `const BetaManagedAgentsFileRubricTypeFile BetaManagedAgentsFileRubricType = "file"` - `type BetaManagedAgentsTextRubric struct{…}` Rubric content provided inline as text. - `Content string` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type BetaManagedAgentsTextRubricType` - `const BetaManagedAgentsTextRubricTypeText BetaManagedAgentsTextRubricType = "text"` - `Type BetaManagedAgentsUserDefineOutcomeEventType` - `const BetaManagedAgentsUserDefineOutcomeEventTypeUserDefineOutcome BetaManagedAgentsUserDefineOutcomeEventType = "user.define_outcome"` - `type BetaManagedAgentsSessionDeletedEvent struct{…}` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionDeletedEventType` - `const BetaManagedAgentsSessionDeletedEventTypeSessionDeleted BetaManagedAgentsSessionDeletedEventType = "session.deleted"` - `type BetaManagedAgentsSessionThreadStatusRunningEvent struct{…}` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that started running. - `Type BetaManagedAgentsSessionThreadStatusRunningEventType` - `const BetaManagedAgentsSessionThreadStatusRunningEventTypeSessionThreadStatusRunning BetaManagedAgentsSessionThreadStatusRunningEventType = "session.thread_status_running"` - `type BetaManagedAgentsSessionThreadStatusIdleEvent struct{…}` A session thread has yielded and is awaiting input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that went idle. - `StopReason BetaManagedAgentsSessionThreadStatusIdleEventStopReasonUnion` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionThreadStatusIdleEventType` - `const BetaManagedAgentsSessionThreadStatusIdleEventTypeSessionThreadStatusIdle BetaManagedAgentsSessionThreadStatusIdleEventType = "session.thread_status_idle"` - `type BetaManagedAgentsSessionThreadStatusTerminatedEvent struct{…}` A session thread has terminated and will accept no further input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that terminated. - `Type BetaManagedAgentsSessionThreadStatusTerminatedEventType` - `const BetaManagedAgentsSessionThreadStatusTerminatedEventTypeSessionThreadStatusTerminated BetaManagedAgentsSessionThreadStatusTerminatedEventType = "session.thread_status_terminated"` - `type BetaManagedAgentsUserToolResultEvent struct{…}` Event sent by the client providing the result of an agent-toolset tool execution. Only valid on `self_hosted` environments, where sandbox-routed tools are executed by the client rather than the server. - `ID string` Unique identifier for this event. - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolResultEventType` - `const BetaManagedAgentsUserToolResultEventTypeUserToolResult BetaManagedAgentsUserToolResultEventType = "user.tool_result"` - `Content []BetaManagedAgentsUserToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `type BetaManagedAgentsSessionThreadStatusRescheduledEvent struct{…}` A session thread hit a transient error and is retrying automatically. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that is retrying. - `Type BetaManagedAgentsSessionThreadStatusRescheduledEventType` - `const BetaManagedAgentsSessionThreadStatusRescheduledEventTypeSessionThreadStatusRescheduled BetaManagedAgentsSessionThreadStatusRescheduledEventType = "session.thread_status_rescheduled"` - `type BetaManagedAgentsSessionUpdatedEvent struct{…}` Emitted when an UpdateSession request changed at least one field. Carries only the fields that changed; absent fields were not part of the update. The new configuration applies from the next turn. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionUpdatedEventType` - `const BetaManagedAgentsSessionUpdatedEventTypeSessionUpdated BetaManagedAgentsSessionUpdatedEventType = "session.updated"` - `Agent BetaManagedAgentsSessionAgent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Multiagent BetaManagedAgentsSessionMultiagentCoordinator` Resolved coordinator topology with full agent definitions for each roster member. - `Agents []BetaManagedAgentsSessionThreadAgent` Full `agent` definitions the coordinator may spawn as session threads. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `Type BetaManagedAgentsSessionMultiagentCoordinatorType` - `const BetaManagedAgentsSessionMultiagentCoordinatorTypeCoordinator BetaManagedAgentsSessionMultiagentCoordinatorType = "coordinator"` - `Name string` - `Skills []BetaManagedAgentsSessionAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `System string` - `Tools []BetaManagedAgentsSessionAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `type BetaManagedAgentsMCPToolset struct{…}` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Type BetaManagedAgentsSessionAgentType` - `const BetaManagedAgentsSessionAgentTypeAgent BetaManagedAgentsSessionAgentType = "agent"` - `Version int64` - `Metadata map[string, string]` The session's full metadata bag after the update. Present when the update set non-empty metadata; absent when metadata was unchanged or cleared to empty. - `Title string` The session's new title. Present only when the update changed it. - `type BetaManagedAgentsSystemMessageEvent struct{…}` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsSystemContentBlock` System content blocks. Text-only. - `Text string` The text content. - `Type BetaManagedAgentsSystemContentBlockType` - `const BetaManagedAgentsSystemContentBlockTypeText BetaManagedAgentsSystemContentBlockType = "text"` - `Type BetaManagedAgentsSystemMessageEventType` - `const BetaManagedAgentsSystemMessageEventTypeSystemMessage BetaManagedAgentsSystemMessageEventType = "system.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) page, err := client.Beta.Sessions.Threads.Events.List( context.TODO(), "sthr_011CZkZVWa6oIjw0rgXZpnBt", anthropic.BetaSessionThreadEventListParams{ SessionID: "sesn_011CZkZAtmR3yMPDzynEDxu7", }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", page) } ``` #### Response ```json { "data": [ { "id": "sevt_011CZkZGOp0iBcp4kaQSihUmy", "content": [ { "text": "Where is my order #1234?", "type": "text" } ], "type": "user.message", "processed_at": "2026-03-15T10:00:00Z" } ], "next_page": "next_page" } ``` ## Stream Session Thread Events `client.Beta.Sessions.Threads.Events.Stream(ctx, threadID, params) (*BetaManagedAgentsStreamSessionThreadEventsUnion, error)` **get** `/v1/sessions/{session_id}/threads/{thread_id}/stream` Stream Session Thread Events ### Parameters - `threadID string` - `params BetaSessionThreadEventStreamParams` - `SessionID param.Field[string]` Path param: Path parameter session_id - `Betas param.Field[[]AnthropicBeta]` Header param: Optional header to specify the beta version(s) you want to use. - `string` - `type AnthropicBeta string` - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` ### Returns - `type BetaManagedAgentsStreamSessionThreadEventsUnion interface{…}` Server-sent event in a single thread's stream. - `type BetaManagedAgentsUserMessageEvent struct{…}` A user message event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsUserMessageEventContentUnion` Array of content blocks comprising the user message. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `const BetaManagedAgentsTextBlockTypeText BetaManagedAgentsTextBlockType = "text"` - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `Source BetaManagedAgentsImageBlockSourceUnion` Union type for image source variants. - `type BetaManagedAgentsBase64ImageSource struct{…}` Base64-encoded image data. - `Data string` Base64-encoded image data. - `MediaType string` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type BetaManagedAgentsBase64ImageSourceType` - `const BetaManagedAgentsBase64ImageSourceTypeBase64 BetaManagedAgentsBase64ImageSourceType = "base64"` - `type BetaManagedAgentsURLImageSource struct{…}` Image referenced by URL. - `Type BetaManagedAgentsURLImageSourceType` - `const BetaManagedAgentsURLImageSourceTypeURL BetaManagedAgentsURLImageSourceType = "url"` - `URL string` URL of the image to fetch. - `type BetaManagedAgentsFileImageSource struct{…}` Image referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileImageSourceType` - `const BetaManagedAgentsFileImageSourceTypeFile BetaManagedAgentsFileImageSourceType = "file"` - `Type BetaManagedAgentsImageBlockType` - `const BetaManagedAgentsImageBlockTypeImage BetaManagedAgentsImageBlockType = "image"` - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source BetaManagedAgentsDocumentBlockSourceUnion` Union type for document source variants. - `type BetaManagedAgentsBase64DocumentSource struct{…}` Base64-encoded document data. - `Data string` Base64-encoded document data. - `MediaType string` MIME type of the document (e.g., "application/pdf"). - `Type BetaManagedAgentsBase64DocumentSourceType` - `const BetaManagedAgentsBase64DocumentSourceTypeBase64 BetaManagedAgentsBase64DocumentSourceType = "base64"` - `type BetaManagedAgentsPlainTextDocumentSource struct{…}` Plain text document content. - `Data string` The plain text content. - `MediaType BetaManagedAgentsPlainTextDocumentSourceMediaType` MIME type of the text content. Must be "text/plain". - `const BetaManagedAgentsPlainTextDocumentSourceMediaTypeTextPlain BetaManagedAgentsPlainTextDocumentSourceMediaType = "text/plain"` - `Type BetaManagedAgentsPlainTextDocumentSourceType` - `const BetaManagedAgentsPlainTextDocumentSourceTypeText BetaManagedAgentsPlainTextDocumentSourceType = "text"` - `type BetaManagedAgentsURLDocumentSource struct{…}` Document referenced by URL. - `Type BetaManagedAgentsURLDocumentSourceType` - `const BetaManagedAgentsURLDocumentSourceTypeURL BetaManagedAgentsURLDocumentSourceType = "url"` - `URL string` URL of the document to fetch. - `type BetaManagedAgentsFileDocumentSource struct{…}` Document referenced by file ID. - `FileID string` ID of a previously uploaded file. - `Type BetaManagedAgentsFileDocumentSourceType` - `const BetaManagedAgentsFileDocumentSourceTypeFile BetaManagedAgentsFileDocumentSourceType = "file"` - `Type BetaManagedAgentsDocumentBlockType` - `const BetaManagedAgentsDocumentBlockTypeDocument BetaManagedAgentsDocumentBlockType = "document"` - `Context string` Additional context about the document for the model. - `Title string` The title of the document. - `Type BetaManagedAgentsUserMessageEventType` - `const BetaManagedAgentsUserMessageEventTypeUserMessage BetaManagedAgentsUserMessageEventType = "user.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `type BetaManagedAgentsUserInterruptEvent struct{…}` An interrupt event that pauses agent execution and returns control to the user. - `ID string` Unique identifier for this event. - `Type BetaManagedAgentsUserInterruptEventType` - `const BetaManagedAgentsUserInterruptEventTypeUserInterrupt BetaManagedAgentsUserInterruptEventType = "user.interrupt"` - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` If absent, interrupts every non-archived thread in a multiagent session (or the primary alone in a single-agent session). If present, interrupts only the named thread. - `type BetaManagedAgentsUserToolConfirmationEvent struct{…}` A tool confirmation event that approves or denies a pending tool execution. - `ID string` Unique identifier for this event. - `Result BetaManagedAgentsUserToolConfirmationEventResult` UserToolConfirmationResult enum - `const BetaManagedAgentsUserToolConfirmationEventResultAllow BetaManagedAgentsUserToolConfirmationEventResult = "allow"` - `const BetaManagedAgentsUserToolConfirmationEventResultDeny BetaManagedAgentsUserToolConfirmationEventResult = "deny"` - `ToolUseID string` The id of the `agent.tool_use` or `agent.mcp_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolConfirmationEventType` - `const BetaManagedAgentsUserToolConfirmationEventTypeUserToolConfirmation BetaManagedAgentsUserToolConfirmationEventType = "user.tool_confirmation"` - `DenyMessage string` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` When set, the confirmation routes to this subagent's thread rather than the primary. Echo this from the `session_thread_id` on the `agent.tool_use` or `agent.mcp_tool_use` event that prompted the approval. - `type BetaManagedAgentsUserCustomToolResultEvent struct{…}` Event sent by the client providing the result of a custom tool execution. - `ID string` Unique identifier for this event. - `CustomToolUseID string` The id of the `agent.custom_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserCustomToolResultEventType` - `const BetaManagedAgentsUserCustomToolResultEventTypeUserCustomToolResult BetaManagedAgentsUserCustomToolResultEventType = "user.custom_tool_result"` - `Content []BetaManagedAgentsUserCustomToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `Citations BetaManagedAgentsSearchResultCitations` Citation settings for a search result. - `Enabled bool` Whether citations are enabled for this search result. - `Content []BetaManagedAgentsSearchResultContent` Array of text content blocks from the search result. - `Text string` The text content. - `Type BetaManagedAgentsSearchResultContentType` - `const BetaManagedAgentsSearchResultContentTypeText BetaManagedAgentsSearchResultContentType = "text"` - `Source string` The URL source of the search result. - `Title string` The title of the search result. - `Type BetaManagedAgentsSearchResultBlockType` - `const BetaManagedAgentsSearchResultBlockTypeSearchResult BetaManagedAgentsSearchResultBlockType = "search_result"` - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `type BetaManagedAgentsAgentCustomToolUseEvent struct{…}` Event emitted when the agent calls a custom tool. The session goes idle until the client sends a `user.custom_tool_result` event with the result. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `Name string` Name of the custom tool being called. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentCustomToolUseEventType` - `const BetaManagedAgentsAgentCustomToolUseEventTypeAgentCustomToolUse BetaManagedAgentsAgentCustomToolUseEventType = "agent.custom_tool_use"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its custom tool use on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.custom_tool_result` event to route the result back. - `type BetaManagedAgentsAgentMessageEvent struct{…}` An agent response event in the session conversation. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsTextBlock` Array of text blocks comprising the agent response. - `Text string` The text content. - `Type BetaManagedAgentsTextBlockType` - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMessageEventType` - `const BetaManagedAgentsAgentMessageEventTypeAgentMessage BetaManagedAgentsAgentMessageEventType = "agent.message"` - `type BetaManagedAgentsAgentThinkingEvent struct{…}` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThinkingEventType` - `const BetaManagedAgentsAgentThinkingEventTypeAgentThinking BetaManagedAgentsAgentThinkingEventType = "agent.thinking"` - `type BetaManagedAgentsAgentMCPToolUseEvent struct{…}` Event emitted when the agent invokes a tool provided by an MCP server. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `MCPServerName string` Name of the MCP server providing the tool. - `Name string` Name of the MCP tool being used. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMCPToolUseEventType` - `const BetaManagedAgentsAgentMCPToolUseEventTypeAgentMCPToolUse BetaManagedAgentsAgentMCPToolUseEventType = "agent.mcp_tool_use"` - `EvaluatedPermission BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission` AgentEvaluatedPermission enum - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionAllow BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "allow"` - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionAsk BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "ask"` - `const BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermissionDeny BetaManagedAgentsAgentMCPToolUseEventEvaluatedPermission = "deny"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.tool_confirmation` event to route the approval back. - `type BetaManagedAgentsAgentMCPToolResultEvent struct{…}` Event representing the result of an MCP tool execution. - `ID string` Unique identifier for this event. - `MCPToolUseID string` The id of the `agent.mcp_tool_use` event this result corresponds to. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentMCPToolResultEventType` - `const BetaManagedAgentsAgentMCPToolResultEventTypeAgentMCPToolResult BetaManagedAgentsAgentMCPToolResultEventType = "agent.mcp_tool_result"` - `Content []BetaManagedAgentsAgentMCPToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsAgentToolUseEvent struct{…}` Event emitted when the agent invokes a built-in agent tool. - `ID string` Unique identifier for this event. - `Input map[string, any]` Input parameters for the tool call. - `Name string` Name of the agent tool being used. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentToolUseEventType` - `const BetaManagedAgentsAgentToolUseEventTypeAgentToolUse BetaManagedAgentsAgentToolUseEventType = "agent.tool_use"` - `EvaluatedPermission BetaManagedAgentsAgentToolUseEventEvaluatedPermission` AgentEvaluatedPermission enum - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionAllow BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "allow"` - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionAsk BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "ask"` - `const BetaManagedAgentsAgentToolUseEventEvaluatedPermissionDeny BetaManagedAgentsAgentToolUseEventEvaluatedPermission = "deny"` - `SessionThreadID string` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Echo this on a `user.tool_confirmation` event to route the approval back. - `type BetaManagedAgentsAgentToolResultEvent struct{…}` Event representing the result of an agent tool execution. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to. - `Type BetaManagedAgentsAgentToolResultEventType` - `const BetaManagedAgentsAgentToolResultEventTypeAgentToolResult BetaManagedAgentsAgentToolResultEventType = "agent.tool_result"` - `Content []BetaManagedAgentsAgentToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `type BetaManagedAgentsAgentThreadMessageReceivedEvent struct{…}` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsAgentThreadMessageReceivedEventContentUnion` Message content blocks. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `FromSessionThreadID string` Public `sthr_` ID of the thread that sent the message. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThreadMessageReceivedEventType` - `const BetaManagedAgentsAgentThreadMessageReceivedEventTypeAgentThreadMessageReceived BetaManagedAgentsAgentThreadMessageReceivedEventType = "agent.thread_message_received"` - `FromAgentName string` Name of the callable agent this message came from. Absent when received from the primary agent. - `type BetaManagedAgentsAgentThreadMessageSentEvent struct{…}` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsAgentThreadMessageSentEventContentUnion` Message content blocks. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `ProcessedAt Time` A timestamp in RFC 3339 format - `ToSessionThreadID string` Public `sthr_` ID of the thread the message was sent to. - `Type BetaManagedAgentsAgentThreadMessageSentEventType` - `const BetaManagedAgentsAgentThreadMessageSentEventTypeAgentThreadMessageSent BetaManagedAgentsAgentThreadMessageSentEventType = "agent.thread_message_sent"` - `ToAgentName string` Name of the callable agent this message was sent to. Absent when sent to the primary agent. - `type BetaManagedAgentsAgentThreadContextCompactedEvent struct{…}` Indicates that context compaction (summarization) occurred during the session. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsAgentThreadContextCompactedEventType` - `const BetaManagedAgentsAgentThreadContextCompactedEventTypeAgentThreadContextCompacted BetaManagedAgentsAgentThreadContextCompactedEventType = "agent.thread_context_compacted"` - `type BetaManagedAgentsSessionErrorEvent struct{…}` An error event indicating a problem occurred during session execution. - `ID string` Unique identifier for this event. - `Error BetaManagedAgentsSessionErrorEventErrorUnion` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `type BetaManagedAgentsUnknownError struct{…}` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsUnknownErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type BetaManagedAgentsRetryStatusRetryingType` - `const BetaManagedAgentsRetryStatusRetryingTypeRetrying BetaManagedAgentsRetryStatusRetryingType = "retrying"` - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type BetaManagedAgentsRetryStatusExhaustedType` - `const BetaManagedAgentsRetryStatusExhaustedTypeExhausted BetaManagedAgentsRetryStatusExhaustedType = "exhausted"` - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsRetryStatusTerminalType` - `const BetaManagedAgentsRetryStatusTerminalTypeTerminal BetaManagedAgentsRetryStatusTerminalType = "terminal"` - `Type BetaManagedAgentsUnknownErrorType` - `const BetaManagedAgentsUnknownErrorTypeUnknownError BetaManagedAgentsUnknownErrorType = "unknown_error"` - `type BetaManagedAgentsModelOverloadedError struct{…}` The model is currently overloaded. Emitted after automatic retries are exhausted. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelOverloadedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelOverloadedErrorType` - `const BetaManagedAgentsModelOverloadedErrorTypeModelOverloadedError BetaManagedAgentsModelOverloadedErrorType = "model_overloaded_error"` - `type BetaManagedAgentsModelRateLimitedError struct{…}` The model request was rate-limited. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRateLimitedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelRateLimitedErrorType` - `const BetaManagedAgentsModelRateLimitedErrorTypeModelRateLimitedError BetaManagedAgentsModelRateLimitedErrorType = "model_rate_limited_error"` - `type BetaManagedAgentsModelRequestFailedError struct{…}` A model request failed for a reason other than overload or rate-limiting. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsModelRequestFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsModelRequestFailedErrorType` - `const BetaManagedAgentsModelRequestFailedErrorTypeModelRequestFailedError BetaManagedAgentsModelRequestFailedErrorType = "model_request_failed_error"` - `type BetaManagedAgentsMCPConnectionFailedError struct{…}` Failed to connect to an MCP server. - `MCPServerName string` Name of the MCP server that failed to connect. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPConnectionFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsMCPConnectionFailedErrorType` - `const BetaManagedAgentsMCPConnectionFailedErrorTypeMCPConnectionFailedError BetaManagedAgentsMCPConnectionFailedErrorType = "mcp_connection_failed_error"` - `type BetaManagedAgentsMCPAuthenticationFailedError struct{…}` Authentication to an MCP server failed. - `MCPServerName string` Name of the MCP server that failed authentication. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsMCPAuthenticationFailedErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsMCPAuthenticationFailedErrorType` - `const BetaManagedAgentsMCPAuthenticationFailedErrorTypeMCPAuthenticationFailedError BetaManagedAgentsMCPAuthenticationFailedErrorType = "mcp_authentication_failed_error"` - `type BetaManagedAgentsBillingError struct{…}` The caller's organization or workspace cannot make model requests — out of credits or spend limit reached. Retrying with the same credentials will not succeed; the caller must resolve the billing state. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsBillingErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsBillingErrorType` - `const BetaManagedAgentsBillingErrorTypeBillingError BetaManagedAgentsBillingErrorType = "billing_error"` - `type BetaManagedAgentsCredentialHostUnreachableError struct{…}` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `CredentialID string` ID of the affected credential. - `Message string` Human-readable error description. - `RetryStatus BetaManagedAgentsCredentialHostUnreachableErrorRetryStatusUnion` What the client should do next in response to this error. - `type BetaManagedAgentsRetryStatusRetrying struct{…}` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `type BetaManagedAgentsRetryStatusExhausted struct{…}` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `type BetaManagedAgentsRetryStatusTerminal struct{…}` The session encountered a terminal error and will transition to `terminated` state. - `Type BetaManagedAgentsCredentialHostUnreachableErrorType` - `const BetaManagedAgentsCredentialHostUnreachableErrorTypeCredentialHostUnreachableError BetaManagedAgentsCredentialHostUnreachableErrorType = "credential_host_unreachable_error"` - `VaultID string` ID of the vault containing the affected credential. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionErrorEventType` - `const BetaManagedAgentsSessionErrorEventTypeSessionError BetaManagedAgentsSessionErrorEventType = "session.error"` - `type BetaManagedAgentsSessionStatusRescheduledEvent struct{…}` Indicates the session is recovering from an error state and is rescheduled for execution. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusRescheduledEventType` - `const BetaManagedAgentsSessionStatusRescheduledEventTypeSessionStatusRescheduled BetaManagedAgentsSessionStatusRescheduledEventType = "session.status_rescheduled"` - `type BetaManagedAgentsSessionStatusRunningEvent struct{…}` Indicates the session is actively running and the agent is working. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusRunningEventType` - `const BetaManagedAgentsSessionStatusRunningEventTypeSessionStatusRunning BetaManagedAgentsSessionStatusRunningEventType = "session.status_running"` - `type BetaManagedAgentsSessionStatusIdleEvent struct{…}` Indicates the agent has paused and is awaiting user input. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `StopReason BetaManagedAgentsSessionStatusIdleEventStopReasonUnion` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `Type BetaManagedAgentsSessionEndTurnType` - `const BetaManagedAgentsSessionEndTurnTypeEndTurn BetaManagedAgentsSessionEndTurnType = "end_turn"` - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `EventIDs []string` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type BetaManagedAgentsSessionRequiresActionType` - `const BetaManagedAgentsSessionRequiresActionTypeRequiresAction BetaManagedAgentsSessionRequiresActionType = "requires_action"` - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionRetriesExhaustedType` - `const BetaManagedAgentsSessionRetriesExhaustedTypeRetriesExhausted BetaManagedAgentsSessionRetriesExhaustedType = "retries_exhausted"` - `Type BetaManagedAgentsSessionStatusIdleEventType` - `const BetaManagedAgentsSessionStatusIdleEventTypeSessionStatusIdle BetaManagedAgentsSessionStatusIdleEventType = "session.status_idle"` - `type BetaManagedAgentsSessionStatusTerminatedEvent struct{…}` Indicates the session has terminated, either due to an error or completion. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionStatusTerminatedEventType` - `const BetaManagedAgentsSessionStatusTerminatedEventTypeSessionStatusTerminated BetaManagedAgentsSessionStatusTerminatedEventType = "session.status_terminated"` - `type BetaManagedAgentsSessionThreadCreatedEvent struct{…}` Emitted when a subagent is spawned as a new thread. Written to the parent thread's output stream so clients observing the session see child creation. - `ID string` Unique identifier for this event. - `AgentName string` Name of the callable agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public `sthr_` ID of the newly created thread. - `Type BetaManagedAgentsSessionThreadCreatedEventType` - `const BetaManagedAgentsSessionThreadCreatedEventTypeSessionThreadCreated BetaManagedAgentsSessionThreadCreatedEventType = "session.thread_created"` - `type BetaManagedAgentsSpanOutcomeEvaluationStartEvent struct{…}` Emitted when an outcome evaluation cycle begins. - `ID string` Unique identifier for this event. - `Iteration int64` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanOutcomeEvaluationStartEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationStartEventTypeSpanOutcomeEvaluationStart BetaManagedAgentsSpanOutcomeEvaluationStartEventType = "span.outcome_evaluation_start"` - `type BetaManagedAgentsSpanOutcomeEvaluationEndEvent struct{…}` Emitted when an outcome evaluation cycle completes. Carries the verdict and aggregate token usage. A verdict of `needs_revision` means another evaluation cycle follows; `satisfied`, `max_iterations_reached`, `failed`, or `interrupted` are terminal — no further evaluation cycles follow. - `ID string` Unique identifier for this event. - `Explanation string` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `Iteration int64` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `OutcomeEvaluationStartID string` The id of the corresponding `span.outcome_evaluation_start` event. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Result string` Evaluation verdict. 'satisfied': criteria met, session goes idle. 'needs_revision': criteria not met, another revision cycle follows. 'max_iterations_reached': evaluation budget exhausted with criteria still unmet — one final acknowledgment turn follows before the session goes idle, but no further evaluation runs. 'failed': grader determined the rubric does not apply to the deliverables. 'interrupted': user sent an interrupt while evaluation was in progress. - `Type BetaManagedAgentsSpanOutcomeEvaluationEndEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationEndEventTypeSpanOutcomeEvaluationEnd BetaManagedAgentsSpanOutcomeEvaluationEndEventType = "span.outcome_evaluation_end"` - `Usage BetaManagedAgentsSpanModelUsage` Token usage for a single model request. - `CacheCreationInputTokens int64` Tokens used to create prompt cache in this request. - `CacheReadInputTokens int64` Tokens read from prompt cache in this request. - `InputTokens int64` Input tokens consumed by this request. - `OutputTokens int64` Output tokens generated by this request. - `Speed BetaManagedAgentsSpanModelUsageSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsSpanModelUsageSpeedStandard BetaManagedAgentsSpanModelUsageSpeed = "standard"` - `const BetaManagedAgentsSpanModelUsageSpeedFast BetaManagedAgentsSpanModelUsageSpeed = "fast"` - `type BetaManagedAgentsSpanModelRequestStartEvent struct{…}` Emitted when a model request is initiated by the agent. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanModelRequestStartEventType` - `const BetaManagedAgentsSpanModelRequestStartEventTypeSpanModelRequestStart BetaManagedAgentsSpanModelRequestStartEventType = "span.model_request_start"` - `type BetaManagedAgentsSpanModelRequestEndEvent struct{…}` Emitted when a model request completes. - `ID string` Unique identifier for this event. - `IsError bool` Whether the model request resulted in an error. - `ModelRequestStartID string` The id of the corresponding `span.model_request_start` event. - `ModelUsage BetaManagedAgentsSpanModelUsage` Token usage for a single model request. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanModelRequestEndEventType` - `const BetaManagedAgentsSpanModelRequestEndEventTypeSpanModelRequestEnd BetaManagedAgentsSpanModelRequestEndEventType = "span.model_request_end"` - `type BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent struct{…}` Periodic heartbeat emitted while an outcome evaluation cycle is in progress. Distinguishes 'evaluation is actively running' from 'evaluation is stuck' between the corresponding `span.outcome_evaluation_start` and `span.outcome_evaluation_end` events. - `ID string` Unique identifier for this event. - `Iteration int64` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `OutcomeID string` The `outc_` ID of the outcome being evaluated. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSpanOutcomeEvaluationOngoingEventType` - `const BetaManagedAgentsSpanOutcomeEvaluationOngoingEventTypeSpanOutcomeEvaluationOngoing BetaManagedAgentsSpanOutcomeEvaluationOngoingEventType = "span.outcome_evaluation_ongoing"` - `type BetaManagedAgentsUserDefineOutcomeEvent struct{…}` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `ID string` Unique identifier for this event. - `Description string` What the agent should produce. Copied from the input event. - `MaxIterations int64` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `OutcomeID string` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Rubric BetaManagedAgentsUserDefineOutcomeEventRubricUnion` Rubric for grading the quality of an outcome. - `type BetaManagedAgentsFileRubric struct{…}` Rubric referenced by a file uploaded via the Files API. - `FileID string` ID of the rubric file. - `Type BetaManagedAgentsFileRubricType` - `const BetaManagedAgentsFileRubricTypeFile BetaManagedAgentsFileRubricType = "file"` - `type BetaManagedAgentsTextRubric struct{…}` Rubric content provided inline as text. - `Content string` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type BetaManagedAgentsTextRubricType` - `const BetaManagedAgentsTextRubricTypeText BetaManagedAgentsTextRubricType = "text"` - `Type BetaManagedAgentsUserDefineOutcomeEventType` - `const BetaManagedAgentsUserDefineOutcomeEventTypeUserDefineOutcome BetaManagedAgentsUserDefineOutcomeEventType = "user.define_outcome"` - `type BetaManagedAgentsSessionDeletedEvent struct{…}` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionDeletedEventType` - `const BetaManagedAgentsSessionDeletedEventTypeSessionDeleted BetaManagedAgentsSessionDeletedEventType = "session.deleted"` - `type BetaManagedAgentsSessionThreadStatusRunningEvent struct{…}` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that started running. - `Type BetaManagedAgentsSessionThreadStatusRunningEventType` - `const BetaManagedAgentsSessionThreadStatusRunningEventTypeSessionThreadStatusRunning BetaManagedAgentsSessionThreadStatusRunningEventType = "session.thread_status_running"` - `type BetaManagedAgentsSessionThreadStatusIdleEvent struct{…}` A session thread has yielded and is awaiting input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that went idle. - `StopReason BetaManagedAgentsSessionThreadStatusIdleEventStopReasonUnion` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionEndTurn struct{…}` The agent completed its turn naturally and is ready for the next user message. - `type BetaManagedAgentsSessionRequiresAction struct{…}` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `type BetaManagedAgentsSessionRetriesExhausted struct{…}` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type BetaManagedAgentsSessionThreadStatusIdleEventType` - `const BetaManagedAgentsSessionThreadStatusIdleEventTypeSessionThreadStatusIdle BetaManagedAgentsSessionThreadStatusIdleEventType = "session.thread_status_idle"` - `type BetaManagedAgentsSessionThreadStatusTerminatedEvent struct{…}` A session thread has terminated and will accept no further input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that terminated. - `Type BetaManagedAgentsSessionThreadStatusTerminatedEventType` - `const BetaManagedAgentsSessionThreadStatusTerminatedEventTypeSessionThreadStatusTerminated BetaManagedAgentsSessionThreadStatusTerminatedEventType = "session.thread_status_terminated"` - `type BetaManagedAgentsUserToolResultEvent struct{…}` Event sent by the client providing the result of an agent-toolset tool execution. Only valid on `self_hosted` environments, where sandbox-routed tools are executed by the client rather than the server. - `ID string` Unique identifier for this event. - `ToolUseID string` The id of the `agent.tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Type BetaManagedAgentsUserToolResultEventType` - `const BetaManagedAgentsUserToolResultEventTypeUserToolResult BetaManagedAgentsUserToolResultEventType = "user.tool_result"` - `Content []BetaManagedAgentsUserToolResultEventContentUnion` The result content returned by the tool. - `type BetaManagedAgentsTextBlock struct{…}` Regular text content. - `type BetaManagedAgentsImageBlock struct{…}` Image content specified directly as base64 data or as a reference via a URL. - `type BetaManagedAgentsDocumentBlock struct{…}` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `type BetaManagedAgentsSearchResultBlock struct{…}` A block containing a web search result. - `IsError bool` Whether the tool execution resulted in an error. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `type BetaManagedAgentsSessionThreadStatusRescheduledEvent struct{…}` A session thread hit a transient error and is retrying automatically. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `ID string` Unique identifier for this event. - `AgentName string` Name of the agent the thread runs. - `ProcessedAt Time` A timestamp in RFC 3339 format - `SessionThreadID string` Public sthr_ ID of the thread that is retrying. - `Type BetaManagedAgentsSessionThreadStatusRescheduledEventType` - `const BetaManagedAgentsSessionThreadStatusRescheduledEventTypeSessionThreadStatusRescheduled BetaManagedAgentsSessionThreadStatusRescheduledEventType = "session.thread_status_rescheduled"` - `type BetaManagedAgentsSessionUpdatedEvent struct{…}` Emitted when an UpdateSession request changed at least one field. Carries only the fields that changed; absent fields were not part of the update. The new configuration applies from the next turn. - `ID string` Unique identifier for this event. - `ProcessedAt Time` A timestamp in RFC 3339 format - `Type BetaManagedAgentsSessionUpdatedEventType` - `const BetaManagedAgentsSessionUpdatedEventTypeSessionUpdated BetaManagedAgentsSessionUpdatedEventType = "session.updated"` - `Agent BetaManagedAgentsSessionAgent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `const BetaManagedAgentsMCPServerURLDefinitionTypeURL BetaManagedAgentsMCPServerURLDefinitionType = "url"` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `type BetaManagedAgentsModel string` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Frontier intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Most intelligent model for building agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` Fastest model with near-frontier intelligence - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Premium model combining maximum intelligence with practical performance - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "claude-sonnet-4-5"` High-performance model for agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "claude-sonnet-4-5-20250929"` High-performance model for agents and coding - `string` - `Speed BetaManagedAgentsModelConfigSpeed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Multiagent BetaManagedAgentsSessionMultiagentCoordinator` Resolved coordinator topology with full agent definitions for each roster member. - `Agents []BetaManagedAgentsSessionThreadAgent` Full `agent` definitions the coordinator may spawn as session threads. - `ID string` - `Description string` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Name string` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `URL string` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `Name string` - `Skills []BetaManagedAgentsSessionThreadAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `SkillID string` - `Type BetaManagedAgentsAnthropicSkillType` - `const BetaManagedAgentsAnthropicSkillTypeAnthropic BetaManagedAgentsAnthropicSkillType = "anthropic"` - `Version string` - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `SkillID string` - `Type BetaManagedAgentsCustomSkillType` - `const BetaManagedAgentsCustomSkillTypeCustom BetaManagedAgentsCustomSkillType = "custom"` - `Version string` - `System string` - `Tools []BetaManagedAgentsSessionThreadAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `Configs []BetaManagedAgentsAgentToolConfig` - `Enabled bool` - `Name BetaManagedAgentsAgentToolConfigName` Built-in agent tool identifier. - `const BetaManagedAgentsAgentToolConfigNameBash BetaManagedAgentsAgentToolConfigName = "bash"` - `const BetaManagedAgentsAgentToolConfigNameEdit BetaManagedAgentsAgentToolConfigName = "edit"` - `const BetaManagedAgentsAgentToolConfigNameRead BetaManagedAgentsAgentToolConfigName = "read"` - `const BetaManagedAgentsAgentToolConfigNameWrite BetaManagedAgentsAgentToolConfigName = "write"` - `const BetaManagedAgentsAgentToolConfigNameGlob BetaManagedAgentsAgentToolConfigName = "glob"` - `const BetaManagedAgentsAgentToolConfigNameGrep BetaManagedAgentsAgentToolConfigName = "grep"` - `const BetaManagedAgentsAgentToolConfigNameWebFetch BetaManagedAgentsAgentToolConfigName = "web_fetch"` - `const BetaManagedAgentsAgentToolConfigNameWebSearch BetaManagedAgentsAgentToolConfigName = "web_search"` - `PermissionPolicy BetaManagedAgentsAgentToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `const BetaManagedAgentsAlwaysAllowPolicyTypeAlwaysAllow BetaManagedAgentsAlwaysAllowPolicyType = "always_allow"` - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `const BetaManagedAgentsAlwaysAskPolicyTypeAlwaysAsk BetaManagedAgentsAlwaysAskPolicyType = "always_ask"` - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAgentToolset20260401Type` - `const BetaManagedAgentsAgentToolset20260401TypeAgentToolset20260401 BetaManagedAgentsAgentToolset20260401Type = "agent_toolset_20260401"` - `type BetaManagedAgentsMCPToolset struct{…}` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy struct{…}` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy struct{…}` Tool calls require user confirmation before execution. - `MCPServerName string` - `Type BetaManagedAgentsMCPToolsetType` - `const BetaManagedAgentsMCPToolsetTypeMCPToolset BetaManagedAgentsMCPToolsetType = "mcp_toolset"` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `const ObjectObject Object = "object"` - `Properties map[string, any]` - `Required []string` - `Name string` - `Type BetaManagedAgentsCustomToolType` - `const BetaManagedAgentsCustomToolTypeCustom BetaManagedAgentsCustomToolType = "custom"` - `Type BetaManagedAgentsSessionThreadAgentType` - `const BetaManagedAgentsSessionThreadAgentTypeAgent BetaManagedAgentsSessionThreadAgentType = "agent"` - `Version int64` - `Type BetaManagedAgentsSessionMultiagentCoordinatorType` - `const BetaManagedAgentsSessionMultiagentCoordinatorTypeCoordinator BetaManagedAgentsSessionMultiagentCoordinatorType = "coordinator"` - `Name string` - `Skills []BetaManagedAgentsSessionAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill struct{…}` A resolved Anthropic-managed skill. - `type BetaManagedAgentsCustomSkill struct{…}` A resolved user-created custom skill. - `System string` - `Tools []BetaManagedAgentsSessionAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401 struct{…}` - `type BetaManagedAgentsMCPToolset struct{…}` - `type BetaManagedAgentsCustomTool struct{…}` A custom tool as returned in API responses. - `Type BetaManagedAgentsSessionAgentType` - `const BetaManagedAgentsSessionAgentTypeAgent BetaManagedAgentsSessionAgentType = "agent"` - `Version int64` - `Metadata map[string, string]` The session's full metadata bag after the update. Present when the update set non-empty metadata; absent when metadata was unchanged or cleared to empty. - `Title string` The session's new title. Present only when the update changed it. - `type BetaManagedAgentsSystemMessageEvent struct{…}` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `ID string` Unique identifier for this event. - `Content []BetaManagedAgentsSystemContentBlock` System content blocks. Text-only. - `Text string` The text content. - `Type BetaManagedAgentsSystemContentBlockType` - `const BetaManagedAgentsSystemContentBlockTypeText BetaManagedAgentsSystemContentBlockType = "text"` - `Type BetaManagedAgentsSystemMessageEventType` - `const BetaManagedAgentsSystemMessageEventTypeSystemMessage BetaManagedAgentsSystemMessageEventType = "system.message"` - `ProcessedAt Time` A timestamp in RFC 3339 format ### Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) stream := client.Beta.Sessions.Threads.Events.StreamEvents( context.TODO(), "sthr_011CZkZVWa6oIjw0rgXZpnBt", anthropic.BetaSessionThreadEventStreamParams{ SessionID: "sesn_011CZkZAtmR3yMPDzynEDxu7", }, ) for stream.Next() { fmt.Printf("%+v\n", stream.Current()) } err := stream.Err() if err != nil { panic(err.Error()) } } ``` #### Response ```json { "id": "sevt_011CZkZGOp0iBcp4kaQSihUmy", "content": [ { "text": "Where is my order #1234?", "type": "text" } ], "type": "user.message", "processed_at": "2026-03-15T10:00:00Z" } ```