# Sessions ## Create Session `BetaManagedAgentsSession beta().sessions().create(SessionCreateParamsparams, RequestOptionsrequestOptions = RequestOptions.none())` **post** `/v1/sessions` Create Session ### Parameters - `SessionCreateParams params` - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` - `Agent agent` 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` - `class BetaManagedAgentsAgentParams:` Specification for an Agent. Provide a specific `version` or use the short-form `agent="agent_id"` for the most recent version - `String id` The `agent` ID. - `Type type` - `AGENT("agent")` - `Optional version` The specific `agent` version to use. Omit to use the latest version. Must be at least 1 if specified. - `String environmentId` ID of the `environment` defining the container configuration for this session. - `Optional metadata` Arbitrary key-value metadata attached to the session. Maximum 16 pairs, keys up to 64 chars, values up to 512 chars. - `Optional> resources` Resources (e.g. repositories, files) to mount into the session's container. - `class BetaManagedAgentsGitHubRepositoryResourceParams:` Mount a GitHub repository into the session's container. - `String authorizationToken` GitHub authorization token used to clone the repository. - `Type type` - `GITHUB_REPOSITORY("github_repository")` - `String url` Github URL of the repository - `Optional checkout` Branch or commit to check out. Defaults to the repository's default branch. - `class BetaManagedAgentsBranchCheckout:` - `String name` Branch name to check out. - `Type type` - `BRANCH("branch")` - `class BetaManagedAgentsCommitCheckout:` - `String sha` Full commit SHA to check out. - `Type type` - `COMMIT("commit")` - `Optional mountPath` Mount path in the container. Defaults to `/workspace/`. - `class BetaManagedAgentsFileResourceParams:` Mount a file uploaded via the Files API into the session. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Optional mountPath` Mount path in the container. Defaults to `/mnt/session/uploads/`. - `class BetaManagedAgentsMemoryStoreResourceParam:` Parameters for attaching a memory store to an agent session. - `String memoryStoreId` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type type` - `MEMORY_STORE("memory_store")` - `Optional access` Access mode for an attached memory store. - `READ_WRITE("read_write")` - `READ_ONLY("read_only")` - `Optional instructions` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `Optional title` Human-readable session title. - `Optional> vaultIds` Vault IDs for stored credentials the agent can use during the session. ### Returns - `class BetaManagedAgentsSession:` A Managed Agents `session`. - `String id` - `BetaManagedAgentsSessionAgent agent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `Optional multiagent` Resolved coordinator topology with full agent definitions for each roster member. - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `class BetaManagedAgentsMcpToolset:` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `Type type` - `AGENT("agent")` - `long version` - `Optional archivedAt` A timestamp in RFC 3339 format - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String environmentId` - `Metadata metadata` - `List outcomeEvaluations` Per-outcome evaluation state. One entry per define_outcome event sent to the session. - `Optional completedAt` A timestamp in RFC 3339 format - `String description` What the agent should produce. - `Optional explanation` 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. - `long iteration` 0-indexed revision cycle the outcome is currently on. - `String outcomeId` Server-generated outc_ ID for this outcome. - `String result` 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 type` - `OUTCOME_EVALUATION("outcome_evaluation")` - `List resources` - `class BetaManagedAgentsGitHubRepositoryResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String mountPath` - `Type type` - `GITHUB_REPOSITORY("github_repository")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `String url` - `Optional checkout` - `class BetaManagedAgentsBranchCheckout:` - `String name` Branch name to check out. - `Type type` - `BRANCH("branch")` - `class BetaManagedAgentsCommitCheckout:` - `String sha` Full commit SHA to check out. - `Type type` - `COMMIT("commit")` - `class BetaManagedAgentsFileResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String fileId` - `String mountPath` - `Type type` - `FILE("file")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsMemoryStoreResource:` A memory store attached to an agent session. - `String memoryStoreId` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type type` - `MEMORY_STORE("memory_store")` - `Optional access` Access mode for an attached memory store. - `READ_WRITE("read_write")` - `READ_ONLY("read_only")` - `Optional description` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Optional instructions` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `Optional mountPath` 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. - `Optional name` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. - `BetaManagedAgentsSessionStats stats` Timing statistics for a session. - `Optional activeSeconds` Cumulative time in seconds the session spent in running status. Excludes idle time. - `Optional durationSeconds` Elapsed time since session creation in seconds. For terminated sessions, frozen at the final update. - `Status status` SessionStatus enum - `RESCHEDULING("rescheduling")` - `RUNNING("running")` - `IDLE("idle")` - `TERMINATED("terminated")` - `Optional title` - `Type type` - `SESSION("session")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `BetaManagedAgentsSessionUsage usage` Cumulative token usage for a session across all turns. - `Optional cacheCreation` Prompt-cache creation token usage broken down by cache lifetime. - `Optional ephemeral1hInputTokens` Tokens used to create 1-hour ephemeral cache entries. - `Optional ephemeral5mInputTokens` Tokens used to create 5-minute ephemeral cache entries. - `Optional cacheReadInputTokens` Total tokens read from prompt cache. - `Optional inputTokens` Total input tokens consumed across all turns. - `Optional outputTokens` Total output tokens generated across all turns. - `List vaultIds` Vault IDs attached to the session at creation. Empty when no vaults were supplied. - `Optional deploymentId` Deployment ID when the session was created from a deployment reference. Null otherwise. ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.BetaManagedAgentsSession; import com.anthropic.models.beta.sessions.SessionCreateParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); SessionCreateParams params = SessionCreateParams.builder() .agent("agent_011CZkYpogX7uDKUyvBTophP") .environmentId("env_011CZkZ9X2dpNyB7HsEFoRfW") .build(); BetaManagedAgentsSession betaManagedAgentsSession = client.beta().sessions().create(params); } } ``` #### 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 `SessionListPage beta().sessions().list(SessionListParamsparams = SessionListParams.none(), RequestOptionsrequestOptions = RequestOptions.none())` **get** `/v1/sessions` List Sessions ### Parameters - `SessionListParams params` - `Optional agentId` Filter sessions created with this agent ID. - `Optional agentVersion` Filter by agent version. Only applies when agent_id is also set. - `Optional createdAtGt` Return sessions created after this time (exclusive). - `Optional createdAtGte` Return sessions created at or after this time (inclusive). - `Optional createdAtLt` Return sessions created before this time (exclusive). - `Optional createdAtLte` Return sessions created at or before this time (inclusive). - `Optional deploymentId` Filter sessions created by this deployment ID. - `Optional includeArchived` When true, includes archived sessions. Default: false (exclude archived). - `Optional limit` Maximum number of results to return. - `Optional memoryStoreId` Filter sessions whose resources contain a memory_store with this memory store ID. - `Optional order` Sort direction for results, ordered by created_at. Defaults to desc (newest first). - `ASC("asc")` - `DESC("desc")` - `Optional page` Opaque pagination cursor from a previous response. - `Optional> statuses` Filter by session status. Repeat the parameter to match any of multiple statuses. - `RESCHEDULING("rescheduling")` - `RUNNING("running")` - `IDLE("idle")` - `TERMINATED("terminated")` - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` ### Returns - `class BetaManagedAgentsSession:` A Managed Agents `session`. - `String id` - `BetaManagedAgentsSessionAgent agent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `Optional multiagent` Resolved coordinator topology with full agent definitions for each roster member. - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `class BetaManagedAgentsMcpToolset:` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `Type type` - `AGENT("agent")` - `long version` - `Optional archivedAt` A timestamp in RFC 3339 format - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String environmentId` - `Metadata metadata` - `List outcomeEvaluations` Per-outcome evaluation state. One entry per define_outcome event sent to the session. - `Optional completedAt` A timestamp in RFC 3339 format - `String description` What the agent should produce. - `Optional explanation` 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. - `long iteration` 0-indexed revision cycle the outcome is currently on. - `String outcomeId` Server-generated outc_ ID for this outcome. - `String result` 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 type` - `OUTCOME_EVALUATION("outcome_evaluation")` - `List resources` - `class BetaManagedAgentsGitHubRepositoryResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String mountPath` - `Type type` - `GITHUB_REPOSITORY("github_repository")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `String url` - `Optional checkout` - `class BetaManagedAgentsBranchCheckout:` - `String name` Branch name to check out. - `Type type` - `BRANCH("branch")` - `class BetaManagedAgentsCommitCheckout:` - `String sha` Full commit SHA to check out. - `Type type` - `COMMIT("commit")` - `class BetaManagedAgentsFileResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String fileId` - `String mountPath` - `Type type` - `FILE("file")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsMemoryStoreResource:` A memory store attached to an agent session. - `String memoryStoreId` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type type` - `MEMORY_STORE("memory_store")` - `Optional access` Access mode for an attached memory store. - `READ_WRITE("read_write")` - `READ_ONLY("read_only")` - `Optional description` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Optional instructions` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `Optional mountPath` 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. - `Optional name` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. - `BetaManagedAgentsSessionStats stats` Timing statistics for a session. - `Optional activeSeconds` Cumulative time in seconds the session spent in running status. Excludes idle time. - `Optional durationSeconds` Elapsed time since session creation in seconds. For terminated sessions, frozen at the final update. - `Status status` SessionStatus enum - `RESCHEDULING("rescheduling")` - `RUNNING("running")` - `IDLE("idle")` - `TERMINATED("terminated")` - `Optional title` - `Type type` - `SESSION("session")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `BetaManagedAgentsSessionUsage usage` Cumulative token usage for a session across all turns. - `Optional cacheCreation` Prompt-cache creation token usage broken down by cache lifetime. - `Optional ephemeral1hInputTokens` Tokens used to create 1-hour ephemeral cache entries. - `Optional ephemeral5mInputTokens` Tokens used to create 5-minute ephemeral cache entries. - `Optional cacheReadInputTokens` Total tokens read from prompt cache. - `Optional inputTokens` Total input tokens consumed across all turns. - `Optional outputTokens` Total output tokens generated across all turns. - `List vaultIds` Vault IDs attached to the session at creation. Empty when no vaults were supplied. - `Optional deploymentId` Deployment ID when the session was created from a deployment reference. Null otherwise. ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.SessionListPage; import com.anthropic.models.beta.sessions.SessionListParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); SessionListPage page = client.beta().sessions().list(); } } ``` #### 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 `BetaManagedAgentsSession beta().sessions().retrieve(SessionRetrieveParamsparams = SessionRetrieveParams.none(), RequestOptionsrequestOptions = RequestOptions.none())` **get** `/v1/sessions/{session_id}` Get Session ### Parameters - `SessionRetrieveParams params` - `Optional sessionId` - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` ### Returns - `class BetaManagedAgentsSession:` A Managed Agents `session`. - `String id` - `BetaManagedAgentsSessionAgent agent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `Optional multiagent` Resolved coordinator topology with full agent definitions for each roster member. - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `class BetaManagedAgentsMcpToolset:` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `Type type` - `AGENT("agent")` - `long version` - `Optional archivedAt` A timestamp in RFC 3339 format - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String environmentId` - `Metadata metadata` - `List outcomeEvaluations` Per-outcome evaluation state. One entry per define_outcome event sent to the session. - `Optional completedAt` A timestamp in RFC 3339 format - `String description` What the agent should produce. - `Optional explanation` 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. - `long iteration` 0-indexed revision cycle the outcome is currently on. - `String outcomeId` Server-generated outc_ ID for this outcome. - `String result` 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 type` - `OUTCOME_EVALUATION("outcome_evaluation")` - `List resources` - `class BetaManagedAgentsGitHubRepositoryResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String mountPath` - `Type type` - `GITHUB_REPOSITORY("github_repository")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `String url` - `Optional checkout` - `class BetaManagedAgentsBranchCheckout:` - `String name` Branch name to check out. - `Type type` - `BRANCH("branch")` - `class BetaManagedAgentsCommitCheckout:` - `String sha` Full commit SHA to check out. - `Type type` - `COMMIT("commit")` - `class BetaManagedAgentsFileResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String fileId` - `String mountPath` - `Type type` - `FILE("file")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsMemoryStoreResource:` A memory store attached to an agent session. - `String memoryStoreId` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type type` - `MEMORY_STORE("memory_store")` - `Optional access` Access mode for an attached memory store. - `READ_WRITE("read_write")` - `READ_ONLY("read_only")` - `Optional description` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Optional instructions` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `Optional mountPath` 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. - `Optional name` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. - `BetaManagedAgentsSessionStats stats` Timing statistics for a session. - `Optional activeSeconds` Cumulative time in seconds the session spent in running status. Excludes idle time. - `Optional durationSeconds` Elapsed time since session creation in seconds. For terminated sessions, frozen at the final update. - `Status status` SessionStatus enum - `RESCHEDULING("rescheduling")` - `RUNNING("running")` - `IDLE("idle")` - `TERMINATED("terminated")` - `Optional title` - `Type type` - `SESSION("session")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `BetaManagedAgentsSessionUsage usage` Cumulative token usage for a session across all turns. - `Optional cacheCreation` Prompt-cache creation token usage broken down by cache lifetime. - `Optional ephemeral1hInputTokens` Tokens used to create 1-hour ephemeral cache entries. - `Optional ephemeral5mInputTokens` Tokens used to create 5-minute ephemeral cache entries. - `Optional cacheReadInputTokens` Total tokens read from prompt cache. - `Optional inputTokens` Total input tokens consumed across all turns. - `Optional outputTokens` Total output tokens generated across all turns. - `List vaultIds` Vault IDs attached to the session at creation. Empty when no vaults were supplied. - `Optional deploymentId` Deployment ID when the session was created from a deployment reference. Null otherwise. ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.BetaManagedAgentsSession; import com.anthropic.models.beta.sessions.SessionRetrieveParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); BetaManagedAgentsSession betaManagedAgentsSession = client.beta().sessions().retrieve("sesn_011CZkZAtmR3yMPDzynEDxu7"); } } ``` #### 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 `BetaManagedAgentsSession beta().sessions().update(SessionUpdateParamsparams = SessionUpdateParams.none(), RequestOptionsrequestOptions = RequestOptions.none())` **post** `/v1/sessions/{session_id}` Update Session ### Parameters - `SessionUpdateParams params` - `Optional sessionId` - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` - `Optional agent` 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. - `Optional metadata` Metadata patch. Set a key to a string to upsert it, or to null to delete it. Omit the field to preserve. - `Optional title` Human-readable session title. - `Optional> vaultIds` Vault IDs (`vlt_*`) to attach to the session. Not yet supported; requests setting this field are rejected. Reserved for future use. ### Returns - `class BetaManagedAgentsSession:` A Managed Agents `session`. - `String id` - `BetaManagedAgentsSessionAgent agent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `Optional multiagent` Resolved coordinator topology with full agent definitions for each roster member. - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `class BetaManagedAgentsMcpToolset:` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `Type type` - `AGENT("agent")` - `long version` - `Optional archivedAt` A timestamp in RFC 3339 format - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String environmentId` - `Metadata metadata` - `List outcomeEvaluations` Per-outcome evaluation state. One entry per define_outcome event sent to the session. - `Optional completedAt` A timestamp in RFC 3339 format - `String description` What the agent should produce. - `Optional explanation` 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. - `long iteration` 0-indexed revision cycle the outcome is currently on. - `String outcomeId` Server-generated outc_ ID for this outcome. - `String result` 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 type` - `OUTCOME_EVALUATION("outcome_evaluation")` - `List resources` - `class BetaManagedAgentsGitHubRepositoryResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String mountPath` - `Type type` - `GITHUB_REPOSITORY("github_repository")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `String url` - `Optional checkout` - `class BetaManagedAgentsBranchCheckout:` - `String name` Branch name to check out. - `Type type` - `BRANCH("branch")` - `class BetaManagedAgentsCommitCheckout:` - `String sha` Full commit SHA to check out. - `Type type` - `COMMIT("commit")` - `class BetaManagedAgentsFileResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String fileId` - `String mountPath` - `Type type` - `FILE("file")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsMemoryStoreResource:` A memory store attached to an agent session. - `String memoryStoreId` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type type` - `MEMORY_STORE("memory_store")` - `Optional access` Access mode for an attached memory store. - `READ_WRITE("read_write")` - `READ_ONLY("read_only")` - `Optional description` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Optional instructions` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `Optional mountPath` 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. - `Optional name` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. - `BetaManagedAgentsSessionStats stats` Timing statistics for a session. - `Optional activeSeconds` Cumulative time in seconds the session spent in running status. Excludes idle time. - `Optional durationSeconds` Elapsed time since session creation in seconds. For terminated sessions, frozen at the final update. - `Status status` SessionStatus enum - `RESCHEDULING("rescheduling")` - `RUNNING("running")` - `IDLE("idle")` - `TERMINATED("terminated")` - `Optional title` - `Type type` - `SESSION("session")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `BetaManagedAgentsSessionUsage usage` Cumulative token usage for a session across all turns. - `Optional cacheCreation` Prompt-cache creation token usage broken down by cache lifetime. - `Optional ephemeral1hInputTokens` Tokens used to create 1-hour ephemeral cache entries. - `Optional ephemeral5mInputTokens` Tokens used to create 5-minute ephemeral cache entries. - `Optional cacheReadInputTokens` Total tokens read from prompt cache. - `Optional inputTokens` Total input tokens consumed across all turns. - `Optional outputTokens` Total output tokens generated across all turns. - `List vaultIds` Vault IDs attached to the session at creation. Empty when no vaults were supplied. - `Optional deploymentId` Deployment ID when the session was created from a deployment reference. Null otherwise. ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.BetaManagedAgentsSession; import com.anthropic.models.beta.sessions.SessionUpdateParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); BetaManagedAgentsSession betaManagedAgentsSession = client.beta().sessions().update("sesn_011CZkZAtmR3yMPDzynEDxu7"); } } ``` #### 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 `BetaManagedAgentsDeletedSession beta().sessions().delete(SessionDeleteParamsparams = SessionDeleteParams.none(), RequestOptionsrequestOptions = RequestOptions.none())` **delete** `/v1/sessions/{session_id}` Delete Session ### Parameters - `SessionDeleteParams params` - `Optional sessionId` - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` ### Returns - `class BetaManagedAgentsDeletedSession:` Confirmation that a `session` has been permanently deleted. - `String id` - `Type type` - `SESSION_DELETED("session_deleted")` ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.BetaManagedAgentsDeletedSession; import com.anthropic.models.beta.sessions.SessionDeleteParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); BetaManagedAgentsDeletedSession betaManagedAgentsDeletedSession = client.beta().sessions().delete("sesn_011CZkZAtmR3yMPDzynEDxu7"); } } ``` #### Response ```json { "id": "sesn_011CZkZAtmR3yMPDzynEDxu7", "type": "session_deleted" } ``` ## Archive Session `BetaManagedAgentsSession beta().sessions().archive(SessionArchiveParamsparams = SessionArchiveParams.none(), RequestOptionsrequestOptions = RequestOptions.none())` **post** `/v1/sessions/{session_id}/archive` Archive Session ### Parameters - `SessionArchiveParams params` - `Optional sessionId` - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` ### Returns - `class BetaManagedAgentsSession:` A Managed Agents `session`. - `String id` - `BetaManagedAgentsSessionAgent agent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `Optional multiagent` Resolved coordinator topology with full agent definitions for each roster member. - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `class BetaManagedAgentsMcpToolset:` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `Type type` - `AGENT("agent")` - `long version` - `Optional archivedAt` A timestamp in RFC 3339 format - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String environmentId` - `Metadata metadata` - `List outcomeEvaluations` Per-outcome evaluation state. One entry per define_outcome event sent to the session. - `Optional completedAt` A timestamp in RFC 3339 format - `String description` What the agent should produce. - `Optional explanation` 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. - `long iteration` 0-indexed revision cycle the outcome is currently on. - `String outcomeId` Server-generated outc_ ID for this outcome. - `String result` 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 type` - `OUTCOME_EVALUATION("outcome_evaluation")` - `List resources` - `class BetaManagedAgentsGitHubRepositoryResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String mountPath` - `Type type` - `GITHUB_REPOSITORY("github_repository")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `String url` - `Optional checkout` - `class BetaManagedAgentsBranchCheckout:` - `String name` Branch name to check out. - `Type type` - `BRANCH("branch")` - `class BetaManagedAgentsCommitCheckout:` - `String sha` Full commit SHA to check out. - `Type type` - `COMMIT("commit")` - `class BetaManagedAgentsFileResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String fileId` - `String mountPath` - `Type type` - `FILE("file")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsMemoryStoreResource:` A memory store attached to an agent session. - `String memoryStoreId` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type type` - `MEMORY_STORE("memory_store")` - `Optional access` Access mode for an attached memory store. - `READ_WRITE("read_write")` - `READ_ONLY("read_only")` - `Optional description` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Optional instructions` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `Optional mountPath` 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. - `Optional name` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. - `BetaManagedAgentsSessionStats stats` Timing statistics for a session. - `Optional activeSeconds` Cumulative time in seconds the session spent in running status. Excludes idle time. - `Optional durationSeconds` Elapsed time since session creation in seconds. For terminated sessions, frozen at the final update. - `Status status` SessionStatus enum - `RESCHEDULING("rescheduling")` - `RUNNING("running")` - `IDLE("idle")` - `TERMINATED("terminated")` - `Optional title` - `Type type` - `SESSION("session")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `BetaManagedAgentsSessionUsage usage` Cumulative token usage for a session across all turns. - `Optional cacheCreation` Prompt-cache creation token usage broken down by cache lifetime. - `Optional ephemeral1hInputTokens` Tokens used to create 1-hour ephemeral cache entries. - `Optional ephemeral5mInputTokens` Tokens used to create 5-minute ephemeral cache entries. - `Optional cacheReadInputTokens` Total tokens read from prompt cache. - `Optional inputTokens` Total input tokens consumed across all turns. - `Optional outputTokens` Total output tokens generated across all turns. - `List vaultIds` Vault IDs attached to the session at creation. Empty when no vaults were supplied. - `Optional deploymentId` Deployment ID when the session was created from a deployment reference. Null otherwise. ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.BetaManagedAgentsSession; import com.anthropic.models.beta.sessions.SessionArchiveParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); BetaManagedAgentsSession betaManagedAgentsSession = client.beta().sessions().archive("sesn_011CZkZAtmR3yMPDzynEDxu7"); } } ``` #### 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 - `class BetaManagedAgentsAgentParams:` Specification for an Agent. Provide a specific `version` or use the short-form `agent="agent_id"` for the most recent version - `String id` The `agent` ID. - `Type type` - `AGENT("agent")` - `Optional version` The specific `agent` version to use. Omit to use the latest version. Must be at least 1 if specified. ### Beta Managed Agents Branch Checkout - `class BetaManagedAgentsBranchCheckout:` - `String name` Branch name to check out. - `Type type` - `BRANCH("branch")` ### Beta Managed Agents Cache Creation Usage - `class BetaManagedAgentsCacheCreationUsage:` Prompt-cache creation token usage broken down by cache lifetime. - `Optional ephemeral1hInputTokens` Tokens used to create 1-hour ephemeral cache entries. - `Optional ephemeral5mInputTokens` Tokens used to create 5-minute ephemeral cache entries. ### Beta Managed Agents Commit Checkout - `class BetaManagedAgentsCommitCheckout:` - `String sha` Full commit SHA to check out. - `Type type` - `COMMIT("commit")` ### Beta Managed Agents Deleted Session - `class BetaManagedAgentsDeletedSession:` Confirmation that a `session` has been permanently deleted. - `String id` - `Type type` - `SESSION_DELETED("session_deleted")` ### Beta Managed Agents File Resource Params - `class BetaManagedAgentsFileResourceParams:` Mount a file uploaded via the Files API into the session. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Optional mountPath` Mount path in the container. Defaults to `/mnt/session/uploads/`. ### Beta Managed Agents GitHub Repository Resource Params - `class BetaManagedAgentsGitHubRepositoryResourceParams:` Mount a GitHub repository into the session's container. - `String authorizationToken` GitHub authorization token used to clone the repository. - `Type type` - `GITHUB_REPOSITORY("github_repository")` - `String url` Github URL of the repository - `Optional checkout` Branch or commit to check out. Defaults to the repository's default branch. - `class BetaManagedAgentsBranchCheckout:` - `String name` Branch name to check out. - `Type type` - `BRANCH("branch")` - `class BetaManagedAgentsCommitCheckout:` - `String sha` Full commit SHA to check out. - `Type type` - `COMMIT("commit")` - `Optional mountPath` Mount path in the container. Defaults to `/workspace/`. ### Beta Managed Agents Memory Store Resource Param - `class BetaManagedAgentsMemoryStoreResourceParam:` Parameters for attaching a memory store to an agent session. - `String memoryStoreId` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type type` - `MEMORY_STORE("memory_store")` - `Optional access` Access mode for an attached memory store. - `READ_WRITE("read_write")` - `READ_ONLY("read_only")` - `Optional instructions` 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 - `class BetaManagedAgentsMultiagent:` Resolved coordinator topology with a concrete agent roster. - `List agents` Agents the coordinator may spawn as session threads, each resolved to a specific version. - `String id` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` ### Beta Managed Agents Multiagent Params - `class BetaManagedAgentsMultiagentParams:` A coordinator topology: the session's primary thread orchestrates work by spawning session threads, each running an agent drawn from the `agents` roster. - `List agents` 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` - `class BetaManagedAgentsAgentParams:` Specification for an Agent. Provide a specific `version` or use the short-form `agent="agent_id"` for the most recent version - `String id` The `agent` ID. - `Type type` - `AGENT("agent")` - `Optional version` The specific `agent` version to use. Omit to use the latest version. Must be at least 1 if specified. - `class BetaManagedAgentsMultiagentSelfParams:` Sentinel roster entry meaning "the agent that owns this configuration". Resolved server-side to a concrete agent reference. - `Type type` - `SELF("self")` - `Type type` - `COORDINATOR("coordinator")` ### Beta Managed Agents Multiagent Roster Entry Params - `class BetaManagedAgentsMultiagentRosterEntryParams: A class that can be one of several variants.union` An entry in a multiagent roster: an agent ID string, a versioned agent reference, or `self`. - `String` - `class BetaManagedAgentsAgentParams:` Specification for an Agent. Provide a specific `version` or use the short-form `agent="agent_id"` for the most recent version - `String id` The `agent` ID. - `Type type` - `AGENT("agent")` - `Optional version` The specific `agent` version to use. Omit to use the latest version. Must be at least 1 if specified. - `class BetaManagedAgentsMultiagentSelfParams:` Sentinel roster entry meaning "the agent that owns this configuration". Resolved server-side to a concrete agent reference. - `Type type` - `SELF("self")` ### Beta Managed Agents Outcome Evaluation Resource - `class BetaManagedAgentsOutcomeEvaluationResource:` Evaluation state for a single outcome defined via a define_outcome event. - `Optional completedAt` A timestamp in RFC 3339 format - `String description` What the agent should produce. - `Optional explanation` 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. - `long iteration` 0-indexed revision cycle the outcome is currently on. - `String outcomeId` Server-generated outc_ ID for this outcome. - `String result` 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 type` - `OUTCOME_EVALUATION("outcome_evaluation")` ### Beta Managed Agents Session - `class BetaManagedAgentsSession:` A Managed Agents `session`. - `String id` - `BetaManagedAgentsSessionAgent agent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `Optional multiagent` Resolved coordinator topology with full agent definitions for each roster member. - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `class BetaManagedAgentsMcpToolset:` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `Type type` - `AGENT("agent")` - `long version` - `Optional archivedAt` A timestamp in RFC 3339 format - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String environmentId` - `Metadata metadata` - `List outcomeEvaluations` Per-outcome evaluation state. One entry per define_outcome event sent to the session. - `Optional completedAt` A timestamp in RFC 3339 format - `String description` What the agent should produce. - `Optional explanation` 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. - `long iteration` 0-indexed revision cycle the outcome is currently on. - `String outcomeId` Server-generated outc_ ID for this outcome. - `String result` 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 type` - `OUTCOME_EVALUATION("outcome_evaluation")` - `List resources` - `class BetaManagedAgentsGitHubRepositoryResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String mountPath` - `Type type` - `GITHUB_REPOSITORY("github_repository")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `String url` - `Optional checkout` - `class BetaManagedAgentsBranchCheckout:` - `String name` Branch name to check out. - `Type type` - `BRANCH("branch")` - `class BetaManagedAgentsCommitCheckout:` - `String sha` Full commit SHA to check out. - `Type type` - `COMMIT("commit")` - `class BetaManagedAgentsFileResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String fileId` - `String mountPath` - `Type type` - `FILE("file")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsMemoryStoreResource:` A memory store attached to an agent session. - `String memoryStoreId` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type type` - `MEMORY_STORE("memory_store")` - `Optional access` Access mode for an attached memory store. - `READ_WRITE("read_write")` - `READ_ONLY("read_only")` - `Optional description` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Optional instructions` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `Optional mountPath` 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. - `Optional name` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. - `BetaManagedAgentsSessionStats stats` Timing statistics for a session. - `Optional activeSeconds` Cumulative time in seconds the session spent in running status. Excludes idle time. - `Optional durationSeconds` Elapsed time since session creation in seconds. For terminated sessions, frozen at the final update. - `Status status` SessionStatus enum - `RESCHEDULING("rescheduling")` - `RUNNING("running")` - `IDLE("idle")` - `TERMINATED("terminated")` - `Optional title` - `Type type` - `SESSION("session")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `BetaManagedAgentsSessionUsage usage` Cumulative token usage for a session across all turns. - `Optional cacheCreation` Prompt-cache creation token usage broken down by cache lifetime. - `Optional ephemeral1hInputTokens` Tokens used to create 1-hour ephemeral cache entries. - `Optional ephemeral5mInputTokens` Tokens used to create 5-minute ephemeral cache entries. - `Optional cacheReadInputTokens` Total tokens read from prompt cache. - `Optional inputTokens` Total input tokens consumed across all turns. - `Optional outputTokens` Total output tokens generated across all turns. - `List vaultIds` Vault IDs attached to the session at creation. Empty when no vaults were supplied. - `Optional deploymentId` Deployment ID when the session was created from a deployment reference. Null otherwise. ### Beta Managed Agents Session Agent - `class BetaManagedAgentsSessionAgent:` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `Optional multiagent` Resolved coordinator topology with full agent definitions for each roster member. - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `class BetaManagedAgentsMcpToolset:` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `Type type` - `AGENT("agent")` - `long version` ### Beta Managed Agents Session Agent Update - `class BetaManagedAgentsSessionAgentUpdate:` 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. - `Optional> mcpServers` Replacement MCP server list. Full replacement: the provided array becomes the new value. Send an empty array to clear; omit to preserve. - `String name` Unique name for this server, referenced by mcp_toolset configurations. 1-255 characters. - `Type type` - `URL("url")` - `String url` Endpoint URL for the MCP server. - `Optional> tools` Replacement tool list. Full replacement: the provided array becomes the new value. Send an empty array to clear; omit to preserve. - `class BetaManagedAgentsAgentToolset20260401Params:` Configuration for built-in agent tools. Use this to enable or disable groups of tools available to the agent. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `Optional> configs` Per-tool configuration overrides. - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `Optional enabled` Whether this tool is enabled and available to Claude. Overrides the default_config setting. - `Optional permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `Optional defaultConfig` Default configuration for all tools in a toolset. - `Optional enabled` Whether tools are enabled and available to Claude by default. Defaults to true if not specified. - `Optional permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `class BetaManagedAgentsMcpToolsetParams:` Configuration for tools from an MCP server defined in `mcp_servers`. - `String mcpServerName` Name of the MCP server. Must match a server name from the mcp_servers array. 1-255 characters. - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `Optional> configs` Per-tool configuration overrides. - `String name` Name of the MCP tool to configure. 1-128 characters. - `Optional enabled` Whether this tool is enabled. Overrides the `default_config` setting. - `Optional permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Optional defaultConfig` Default configuration for all tools from an MCP server. - `Optional enabled` Whether tools are enabled by default. Defaults to true if not specified. - `Optional permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `class BetaManagedAgentsCustomToolParams:` 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. - `String description` Description of what the tool does, shown to the agent to help it decide when to use the tool. 1-1024 characters. - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` Unique name for the tool. 1-128 characters; letters, digits, underscores, and hyphens. - `Type type` - `CUSTOM("custom")` ### Beta Managed Agents Session Multiagent Coordinator - `class BetaManagedAgentsSessionMultiagentCoordinator:` Resolved coordinator topology with full agent definitions for each roster member. - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` ### Beta Managed Agents Session Stats - `class BetaManagedAgentsSessionStats:` Timing statistics for a session. - `Optional activeSeconds` Cumulative time in seconds the session spent in running status. Excludes idle time. - `Optional durationSeconds` Elapsed time since session creation in seconds. For terminated sessions, frozen at the final update. ### Beta Managed Agents Session Updated Event - `class BetaManagedAgentsSessionUpdatedEvent:` 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. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_UPDATED("session.updated")` - `Optional agent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `Optional multiagent` Resolved coordinator topology with full agent definitions for each roster member. - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `class BetaManagedAgentsMcpToolset:` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `Type type` - `AGENT("agent")` - `long version` - `Optional metadata` 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. - `Optional title` The session's new title. Present only when the update changed it. ### Beta Managed Agents Session Usage - `class BetaManagedAgentsSessionUsage:` Cumulative token usage for a session across all turns. - `Optional cacheCreation` Prompt-cache creation token usage broken down by cache lifetime. - `Optional ephemeral1hInputTokens` Tokens used to create 1-hour ephemeral cache entries. - `Optional ephemeral5mInputTokens` Tokens used to create 5-minute ephemeral cache entries. - `Optional cacheReadInputTokens` Total tokens read from prompt cache. - `Optional inputTokens` Total input tokens consumed across all turns. - `Optional outputTokens` Total output tokens generated across all turns. ### Beta Managed Agents System Content Block - `class BetaManagedAgentsSystemContentBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` ### Beta Managed Agents System Message Event - `class BetaManagedAgentsSystemMessageEvent:` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `String id` Unique identifier for this event. - `List content` System content blocks. Text-only. - `String text` The text content. - `Type type` - `TEXT("text")` - `Type type` - `SYSTEM_MESSAGE("system.message")` - `Optional processedAt` A timestamp in RFC 3339 format ### Beta Managed Agents User Tool Result Event - `class BetaManagedAgentsUserToolResultEvent:` 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. - `String id` Unique identifier for this event. - `String toolUseId` 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 type` - `USER_TOOL_RESULT("user.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. # Events ## List Events `EventListPage beta().sessions().events().list(EventListParamsparams = EventListParams.none(), RequestOptionsrequestOptions = RequestOptions.none())` **get** `/v1/sessions/{session_id}/events` List Events ### Parameters - `EventListParams params` - `Optional sessionId` - `Optional createdAtGt` Return events created after this time (exclusive). - `Optional createdAtGte` Return events created at or after this time (inclusive). - `Optional createdAtLt` Return events created before this time (exclusive). - `Optional createdAtLte` Return events created at or before this time (inclusive). - `Optional limit` Query parameter for limit - `Optional order` Sort direction for results, ordered by created_at. Defaults to asc (chronological). - `ASC("asc")` - `DESC("desc")` - `Optional page` Opaque pagination cursor from a previous response's next_page. - `Optional> types` 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. - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` ### Returns - `class BetaManagedAgentsSessionEvent: A class that can be one of several variants.union` Union type for all event types in a session. - `class BetaManagedAgentsUserMessageEvent:` A user message event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of content blocks comprising the user message. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `Type type` - `USER_MESSAGE("user.message")` - `Optional processedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsUserInterruptEvent:` An interrupt event that pauses agent execution and returns control to the user. - `String id` Unique identifier for this event. - `Type type` - `USER_INTERRUPT("user.interrupt")` - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserToolConfirmationEvent:` A tool confirmation event that approves or denies a pending tool execution. - `String id` Unique identifier for this event. - `Result result` UserToolConfirmationResult enum - `ALLOW("allow")` - `DENY("deny")` - `String toolUseId` 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 type` - `USER_TOOL_CONFIRMATION("user.tool_confirmation")` - `Optional denyMessage` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserCustomToolResultEvent:` Event sent by the client providing the result of a custom tool execution. - `String id` Unique identifier for this event. - `String customToolUseId` 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 type` - `USER_CUSTOM_TOOL_RESULT("user.custom_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `class BetaManagedAgentsAgentCustomToolUseEvent:` 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. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the custom tool being called. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_CUSTOM_TOOL_USE("agent.custom_tool_use")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentMessageEvent:` An agent response event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of text blocks comprising the agent response. - `String text` The text content. - `Type type` - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MESSAGE("agent.message")` - `class BetaManagedAgentsAgentThinkingEvent:` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THINKING("agent.thinking")` - `class BetaManagedAgentsAgentMcpToolUseEvent:` Event emitted when the agent invokes a tool provided by an MCP server. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String mcpServerName` Name of the MCP server providing the tool. - `String name` Name of the MCP tool being used. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MCP_TOOL_USE("agent.mcp_tool_use")` - `Optional evaluatedPermission` AgentEvaluatedPermission enum - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentMcpToolResultEvent:` Event representing the result of an MCP tool execution. - `String id` Unique identifier for this event. - `String mcpToolUseId` The id of the `agent.mcp_tool_use` event this result corresponds to. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MCP_TOOL_RESULT("agent.mcp_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsAgentToolUseEvent:` Event emitted when the agent invokes a built-in agent tool. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the agent tool being used. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_TOOL_USE("agent.tool_use")` - `Optional evaluatedPermission` AgentEvaluatedPermission enum - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentToolResultEvent:` Event representing the result of an agent tool execution. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String toolUseId` The id of the `agent.tool_use` event this result corresponds to. - `Type type` - `AGENT_TOOL_RESULT("agent.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsAgentThreadMessageReceivedEvent:` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `String fromSessionThreadId` Public `sthr_` ID of the thread that sent the message. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THREAD_MESSAGE_RECEIVED("agent.thread_message_received")` - `Optional fromAgentName` Name of the callable agent this message came from. Absent when received from the primary agent. - `class BetaManagedAgentsAgentThreadMessageSentEvent:` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String toSessionThreadId` Public `sthr_` ID of the thread the message was sent to. - `Type type` - `AGENT_THREAD_MESSAGE_SENT("agent.thread_message_sent")` - `Optional toAgentName` Name of the callable agent this message was sent to. Absent when sent to the primary agent. - `class BetaManagedAgentsAgentThreadContextCompactedEvent:` Indicates that context compaction (summarization) occurred during the session. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THREAD_CONTEXT_COMPACTED("agent.thread_context_compacted")` - `class BetaManagedAgentsSessionErrorEvent:` An error event indicating a problem occurred during session execution. - `String id` Unique identifier for this event. - `Error error` 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. - `class BetaManagedAgentsUnknownError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` - `Type type` - `UNKNOWN_ERROR("unknown_error")` - `class BetaManagedAgentsModelOverloadedError:` The model is currently overloaded. Emitted after automatic retries are exhausted. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_OVERLOADED_ERROR("model_overloaded_error")` - `class BetaManagedAgentsModelRateLimitedError:` The model request was rate-limited. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_RATE_LIMITED_ERROR("model_rate_limited_error")` - `class BetaManagedAgentsModelRequestFailedError:` A model request failed for a reason other than overload or rate-limiting. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_REQUEST_FAILED_ERROR("model_request_failed_error")` - `class BetaManagedAgentsMcpConnectionFailedError:` Failed to connect to an MCP server. - `String mcpServerName` Name of the MCP server that failed to connect. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MCP_CONNECTION_FAILED_ERROR("mcp_connection_failed_error")` - `class BetaManagedAgentsMcpAuthenticationFailedError:` Authentication to an MCP server failed. - `String mcpServerName` Name of the MCP server that failed authentication. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MCP_AUTHENTICATION_FAILED_ERROR("mcp_authentication_failed_error")` - `class BetaManagedAgentsBillingError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `BILLING_ERROR("billing_error")` - `class BetaManagedAgentsCredentialHostUnreachableError:` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `String credentialId` ID of the affected credential. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `CREDENTIAL_HOST_UNREACHABLE_ERROR("credential_host_unreachable_error")` - `String vaultId` ID of the vault containing the affected credential. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_ERROR("session.error")` - `class BetaManagedAgentsSessionStatusRescheduledEvent:` Indicates the session is recovering from an error state and is rescheduled for execution. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_RESCHEDULED("session.status_rescheduled")` - `class BetaManagedAgentsSessionStatusRunningEvent:` Indicates the session is actively running and the agent is working. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_RUNNING("session.status_running")` - `class BetaManagedAgentsSessionStatusIdleEvent:` Indicates the agent has paused and is awaiting user input. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `StopReason stopReason` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `Type type` - `END_TURN("end_turn")` - `class BetaManagedAgentsSessionRequiresAction:` 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. - `List eventIds` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type type` - `REQUIRES_ACTION("requires_action")` - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `RETRIES_EXHAUSTED("retries_exhausted")` - `Type type` - `SESSION_STATUS_IDLE("session.status_idle")` - `class BetaManagedAgentsSessionStatusTerminatedEvent:` Indicates the session has terminated, either due to an error or completion. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_TERMINATED("session.status_terminated")` - `class BetaManagedAgentsSessionThreadCreatedEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the callable agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public `sthr_` ID of the newly created thread. - `Type type` - `SESSION_THREAD_CREATED("session.thread_created")` - `class BetaManagedAgentsSpanOutcomeEvaluationStartEvent:` Emitted when an outcome evaluation cycle begins. - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_OUTCOME_EVALUATION_START("span.outcome_evaluation_start")` - `class BetaManagedAgentsSpanOutcomeEvaluationEndEvent:` 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. - `String id` Unique identifier for this event. - `String explanation` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `String outcomeEvaluationStartId` The id of the corresponding `span.outcome_evaluation_start` event. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String result` 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 type` - `SPAN_OUTCOME_EVALUATION_END("span.outcome_evaluation_end")` - `BetaManagedAgentsSpanModelUsage usage` Token usage for a single model request. - `long cacheCreationInputTokens` Tokens used to create prompt cache in this request. - `long cacheReadInputTokens` Tokens read from prompt cache in this request. - `long inputTokens` Input tokens consumed by this request. - `long outputTokens` Output tokens generated by this request. - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `class BetaManagedAgentsSpanModelRequestStartEvent:` Emitted when a model request is initiated by the agent. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_MODEL_REQUEST_START("span.model_request_start")` - `class BetaManagedAgentsSpanModelRequestEndEvent:` Emitted when a model request completes. - `String id` Unique identifier for this event. - `Optional isError` Whether the model request resulted in an error. - `String modelRequestStartId` The id of the corresponding `span.model_request_start` event. - `BetaManagedAgentsSpanModelUsage modelUsage` Token usage for a single model request. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_MODEL_REQUEST_END("span.model_request_end")` - `class BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent:` 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. - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_OUTCOME_EVALUATION_ONGOING("span.outcome_evaluation_ongoing")` - `class BetaManagedAgentsUserDefineOutcomeEvent:` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `String id` Unique identifier for this event. - `String description` What the agent should produce. Copied from the input event. - `Optional maxIterations` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `String outcomeId` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Rubric rubric` Rubric for grading the quality of an outcome. - `class BetaManagedAgentsFileRubric:` Rubric referenced by a file uploaded via the Files API. - `String fileId` ID of the rubric file. - `Type type` - `FILE("file")` - `class BetaManagedAgentsTextRubric:` Rubric content provided inline as text. - `String content` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type type` - `TEXT("text")` - `Type type` - `USER_DEFINE_OUTCOME("user.define_outcome")` - `class BetaManagedAgentsSessionDeletedEvent:` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_DELETED("session.deleted")` - `class BetaManagedAgentsSessionThreadStatusRunningEvent:` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that started running. - `Type type` - `SESSION_THREAD_STATUS_RUNNING("session.thread_status_running")` - `class BetaManagedAgentsSessionThreadStatusIdleEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that went idle. - `StopReason stopReason` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionRequiresAction:` 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. - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `SESSION_THREAD_STATUS_IDLE("session.thread_status_idle")` - `class BetaManagedAgentsSessionThreadStatusTerminatedEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that terminated. - `Type type` - `SESSION_THREAD_STATUS_TERMINATED("session.thread_status_terminated")` - `class BetaManagedAgentsUserToolResultEvent:` 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. - `String id` Unique identifier for this event. - `String toolUseId` 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 type` - `USER_TOOL_RESULT("user.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `class BetaManagedAgentsSessionThreadStatusRescheduledEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that is retrying. - `Type type` - `SESSION_THREAD_STATUS_RESCHEDULED("session.thread_status_rescheduled")` - `class BetaManagedAgentsSessionUpdatedEvent:` 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. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_UPDATED("session.updated")` - `Optional agent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `Optional multiagent` Resolved coordinator topology with full agent definitions for each roster member. - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `class BetaManagedAgentsMcpToolset:` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `Type type` - `AGENT("agent")` - `long version` - `Optional metadata` 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. - `Optional title` The session's new title. Present only when the update changed it. - `class BetaManagedAgentsSystemMessageEvent:` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `String id` Unique identifier for this event. - `List content` System content blocks. Text-only. - `String text` The text content. - `Type type` - `TEXT("text")` - `Type type` - `SYSTEM_MESSAGE("system.message")` - `Optional processedAt` A timestamp in RFC 3339 format ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.events.EventListPage; import com.anthropic.models.beta.sessions.events.EventListParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); EventListPage page = client.beta().sessions().events().list("sesn_011CZkZAtmR3yMPDzynEDxu7"); } } ``` #### 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 `BetaManagedAgentsSendSessionEvents beta().sessions().events().send(EventSendParamsparams, RequestOptionsrequestOptions = RequestOptions.none())` **post** `/v1/sessions/{session_id}/events` Send Events ### Parameters - `EventSendParams params` - `Optional sessionId` - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` - `List events` Events to send to the `session`. - `class BetaManagedAgentsUserMessageEventParams:` Parameters for sending a user message to the session. - `List content` Array of content blocks for the user message. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `Type type` - `USER_MESSAGE("user.message")` - `class BetaManagedAgentsUserInterruptEventParams:` Parameters for sending an interrupt to pause the agent. - `Type type` - `USER_INTERRUPT("user.interrupt")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserToolConfirmationEventParams:` Parameters for confirming or denying a tool execution request. - `Result result` UserToolConfirmationResult enum - `ALLOW("allow")` - `DENY("deny")` - `String toolUseId` 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 type` - `USER_TOOL_CONFIRMATION("user.tool_confirmation")` - `Optional denyMessage` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `class BetaManagedAgentsUserCustomToolResultEventParams:` Parameters for providing the result of a custom tool execution. - `String customToolUseId` 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 type` - `USER_CUSTOM_TOOL_RESULT("user.custom_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsUserDefineOutcomeEventParams:` Parameters for defining an outcome the agent should work toward. The agent begins work on receipt. - `String description` What the agent should produce. This is the task specification. - `Rubric rubric` Rubric for grading the quality of an outcome. - `class BetaManagedAgentsFileRubricParams:` Rubric referenced by a file uploaded via the Files API. - `String fileId` ID of the rubric file. - `Type type` - `FILE("file")` - `class BetaManagedAgentsTextRubricParams:` Rubric content provided inline as text. - `String content` Rubric content. Plain text or markdown — the grader treats it as freeform text. Maximum 262144 characters. - `Type type` - `TEXT("text")` - `Type type` - `USER_DEFINE_OUTCOME("user.define_outcome")` - `Optional maxIterations` Eval→revision cycles before giving up. Default 3, max 20. - `class BetaManagedAgentsUserToolResultEventParams:` 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. - `String toolUseId` 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 type` - `USER_TOOL_RESULT("user.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsSystemMessageEventParams:` 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. - `List content` System content blocks to append. Text-only. - `String text` The text content. - `Type type` - `TEXT("text")` - `Type type` - `SYSTEM_MESSAGE("system.message")` ### Returns - `class BetaManagedAgentsSendSessionEvents:` Events that were successfully sent to the session. - `Optional> data` Sent events - `class BetaManagedAgentsUserMessageEvent:` A user message event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of content blocks comprising the user message. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `Type type` - `USER_MESSAGE("user.message")` - `Optional processedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsUserInterruptEvent:` An interrupt event that pauses agent execution and returns control to the user. - `String id` Unique identifier for this event. - `Type type` - `USER_INTERRUPT("user.interrupt")` - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserToolConfirmationEvent:` A tool confirmation event that approves or denies a pending tool execution. - `String id` Unique identifier for this event. - `Result result` UserToolConfirmationResult enum - `ALLOW("allow")` - `DENY("deny")` - `String toolUseId` 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 type` - `USER_TOOL_CONFIRMATION("user.tool_confirmation")` - `Optional denyMessage` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserCustomToolResultEvent:` Event sent by the client providing the result of a custom tool execution. - `String id` Unique identifier for this event. - `String customToolUseId` 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 type` - `USER_CUSTOM_TOOL_RESULT("user.custom_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `class BetaManagedAgentsUserDefineOutcomeEvent:` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `String id` Unique identifier for this event. - `String description` What the agent should produce. Copied from the input event. - `Optional maxIterations` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `String outcomeId` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Rubric rubric` Rubric for grading the quality of an outcome. - `class BetaManagedAgentsFileRubric:` Rubric referenced by a file uploaded via the Files API. - `String fileId` ID of the rubric file. - `Type type` - `FILE("file")` - `class BetaManagedAgentsTextRubric:` Rubric content provided inline as text. - `String content` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type type` - `TEXT("text")` - `Type type` - `USER_DEFINE_OUTCOME("user.define_outcome")` - `class BetaManagedAgentsUserToolResultEvent:` 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. - `String id` Unique identifier for this event. - `String toolUseId` 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 type` - `USER_TOOL_RESULT("user.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `class BetaManagedAgentsSystemMessageEvent:` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `String id` Unique identifier for this event. - `List content` System content blocks. Text-only. - `String text` The text content. - `Type type` - `TEXT("text")` - `Type type` - `SYSTEM_MESSAGE("system.message")` - `Optional processedAt` A timestamp in RFC 3339 format ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.events.BetaManagedAgentsSendSessionEvents; import com.anthropic.models.beta.sessions.events.BetaManagedAgentsTextBlock; import com.anthropic.models.beta.sessions.events.BetaManagedAgentsUserMessageEventParams; import com.anthropic.models.beta.sessions.events.EventSendParams; import java.util.List; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); EventSendParams params = EventSendParams.builder() .sessionId("sesn_011CZkZAtmR3yMPDzynEDxu7") .addUserMessageEvent(List.of(BetaManagedAgentsUserMessageEventParams.Content.ofText(BetaManagedAgentsTextBlock.builder() .text("Where is my order #1234?") .type(BetaManagedAgentsTextBlock.Type.TEXT) .build()))) .build(); BetaManagedAgentsSendSessionEvents betaManagedAgentsSendSessionEvents = client.beta().sessions().events().send(params); } } ``` #### 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 `BetaManagedAgentsStreamSessionEvents beta().sessions().events().streamStreaming(EventStreamParamsparams = EventStreamParams.none(), RequestOptionsrequestOptions = RequestOptions.none())` **get** `/v1/sessions/{session_id}/events/stream` Stream Events ### Parameters - `EventStreamParams params` - `Optional sessionId` - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` ### Returns - `class BetaManagedAgentsStreamSessionEvents: A class that can be one of several variants.union` Server-sent event in the session stream. - `class BetaManagedAgentsUserMessageEvent:` A user message event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of content blocks comprising the user message. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `Type type` - `USER_MESSAGE("user.message")` - `Optional processedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsUserInterruptEvent:` An interrupt event that pauses agent execution and returns control to the user. - `String id` Unique identifier for this event. - `Type type` - `USER_INTERRUPT("user.interrupt")` - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserToolConfirmationEvent:` A tool confirmation event that approves or denies a pending tool execution. - `String id` Unique identifier for this event. - `Result result` UserToolConfirmationResult enum - `ALLOW("allow")` - `DENY("deny")` - `String toolUseId` 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 type` - `USER_TOOL_CONFIRMATION("user.tool_confirmation")` - `Optional denyMessage` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserCustomToolResultEvent:` Event sent by the client providing the result of a custom tool execution. - `String id` Unique identifier for this event. - `String customToolUseId` 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 type` - `USER_CUSTOM_TOOL_RESULT("user.custom_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `class BetaManagedAgentsAgentCustomToolUseEvent:` 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. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the custom tool being called. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_CUSTOM_TOOL_USE("agent.custom_tool_use")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentMessageEvent:` An agent response event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of text blocks comprising the agent response. - `String text` The text content. - `Type type` - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MESSAGE("agent.message")` - `class BetaManagedAgentsAgentThinkingEvent:` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THINKING("agent.thinking")` - `class BetaManagedAgentsAgentMcpToolUseEvent:` Event emitted when the agent invokes a tool provided by an MCP server. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String mcpServerName` Name of the MCP server providing the tool. - `String name` Name of the MCP tool being used. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MCP_TOOL_USE("agent.mcp_tool_use")` - `Optional evaluatedPermission` AgentEvaluatedPermission enum - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentMcpToolResultEvent:` Event representing the result of an MCP tool execution. - `String id` Unique identifier for this event. - `String mcpToolUseId` The id of the `agent.mcp_tool_use` event this result corresponds to. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MCP_TOOL_RESULT("agent.mcp_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsAgentToolUseEvent:` Event emitted when the agent invokes a built-in agent tool. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the agent tool being used. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_TOOL_USE("agent.tool_use")` - `Optional evaluatedPermission` AgentEvaluatedPermission enum - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentToolResultEvent:` Event representing the result of an agent tool execution. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String toolUseId` The id of the `agent.tool_use` event this result corresponds to. - `Type type` - `AGENT_TOOL_RESULT("agent.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsAgentThreadMessageReceivedEvent:` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `String fromSessionThreadId` Public `sthr_` ID of the thread that sent the message. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THREAD_MESSAGE_RECEIVED("agent.thread_message_received")` - `Optional fromAgentName` Name of the callable agent this message came from. Absent when received from the primary agent. - `class BetaManagedAgentsAgentThreadMessageSentEvent:` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String toSessionThreadId` Public `sthr_` ID of the thread the message was sent to. - `Type type` - `AGENT_THREAD_MESSAGE_SENT("agent.thread_message_sent")` - `Optional toAgentName` Name of the callable agent this message was sent to. Absent when sent to the primary agent. - `class BetaManagedAgentsAgentThreadContextCompactedEvent:` Indicates that context compaction (summarization) occurred during the session. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THREAD_CONTEXT_COMPACTED("agent.thread_context_compacted")` - `class BetaManagedAgentsSessionErrorEvent:` An error event indicating a problem occurred during session execution. - `String id` Unique identifier for this event. - `Error error` 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. - `class BetaManagedAgentsUnknownError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` - `Type type` - `UNKNOWN_ERROR("unknown_error")` - `class BetaManagedAgentsModelOverloadedError:` The model is currently overloaded. Emitted after automatic retries are exhausted. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_OVERLOADED_ERROR("model_overloaded_error")` - `class BetaManagedAgentsModelRateLimitedError:` The model request was rate-limited. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_RATE_LIMITED_ERROR("model_rate_limited_error")` - `class BetaManagedAgentsModelRequestFailedError:` A model request failed for a reason other than overload or rate-limiting. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_REQUEST_FAILED_ERROR("model_request_failed_error")` - `class BetaManagedAgentsMcpConnectionFailedError:` Failed to connect to an MCP server. - `String mcpServerName` Name of the MCP server that failed to connect. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MCP_CONNECTION_FAILED_ERROR("mcp_connection_failed_error")` - `class BetaManagedAgentsMcpAuthenticationFailedError:` Authentication to an MCP server failed. - `String mcpServerName` Name of the MCP server that failed authentication. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MCP_AUTHENTICATION_FAILED_ERROR("mcp_authentication_failed_error")` - `class BetaManagedAgentsBillingError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `BILLING_ERROR("billing_error")` - `class BetaManagedAgentsCredentialHostUnreachableError:` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `String credentialId` ID of the affected credential. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `CREDENTIAL_HOST_UNREACHABLE_ERROR("credential_host_unreachable_error")` - `String vaultId` ID of the vault containing the affected credential. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_ERROR("session.error")` - `class BetaManagedAgentsSessionStatusRescheduledEvent:` Indicates the session is recovering from an error state and is rescheduled for execution. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_RESCHEDULED("session.status_rescheduled")` - `class BetaManagedAgentsSessionStatusRunningEvent:` Indicates the session is actively running and the agent is working. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_RUNNING("session.status_running")` - `class BetaManagedAgentsSessionStatusIdleEvent:` Indicates the agent has paused and is awaiting user input. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `StopReason stopReason` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `Type type` - `END_TURN("end_turn")` - `class BetaManagedAgentsSessionRequiresAction:` 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. - `List eventIds` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type type` - `REQUIRES_ACTION("requires_action")` - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `RETRIES_EXHAUSTED("retries_exhausted")` - `Type type` - `SESSION_STATUS_IDLE("session.status_idle")` - `class BetaManagedAgentsSessionStatusTerminatedEvent:` Indicates the session has terminated, either due to an error or completion. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_TERMINATED("session.status_terminated")` - `class BetaManagedAgentsSessionThreadCreatedEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the callable agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public `sthr_` ID of the newly created thread. - `Type type` - `SESSION_THREAD_CREATED("session.thread_created")` - `class BetaManagedAgentsSpanOutcomeEvaluationStartEvent:` Emitted when an outcome evaluation cycle begins. - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_OUTCOME_EVALUATION_START("span.outcome_evaluation_start")` - `class BetaManagedAgentsSpanOutcomeEvaluationEndEvent:` 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. - `String id` Unique identifier for this event. - `String explanation` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `String outcomeEvaluationStartId` The id of the corresponding `span.outcome_evaluation_start` event. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String result` 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 type` - `SPAN_OUTCOME_EVALUATION_END("span.outcome_evaluation_end")` - `BetaManagedAgentsSpanModelUsage usage` Token usage for a single model request. - `long cacheCreationInputTokens` Tokens used to create prompt cache in this request. - `long cacheReadInputTokens` Tokens read from prompt cache in this request. - `long inputTokens` Input tokens consumed by this request. - `long outputTokens` Output tokens generated by this request. - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `class BetaManagedAgentsSpanModelRequestStartEvent:` Emitted when a model request is initiated by the agent. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_MODEL_REQUEST_START("span.model_request_start")` - `class BetaManagedAgentsSpanModelRequestEndEvent:` Emitted when a model request completes. - `String id` Unique identifier for this event. - `Optional isError` Whether the model request resulted in an error. - `String modelRequestStartId` The id of the corresponding `span.model_request_start` event. - `BetaManagedAgentsSpanModelUsage modelUsage` Token usage for a single model request. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_MODEL_REQUEST_END("span.model_request_end")` - `class BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent:` 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. - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_OUTCOME_EVALUATION_ONGOING("span.outcome_evaluation_ongoing")` - `class BetaManagedAgentsUserDefineOutcomeEvent:` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `String id` Unique identifier for this event. - `String description` What the agent should produce. Copied from the input event. - `Optional maxIterations` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `String outcomeId` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Rubric rubric` Rubric for grading the quality of an outcome. - `class BetaManagedAgentsFileRubric:` Rubric referenced by a file uploaded via the Files API. - `String fileId` ID of the rubric file. - `Type type` - `FILE("file")` - `class BetaManagedAgentsTextRubric:` Rubric content provided inline as text. - `String content` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type type` - `TEXT("text")` - `Type type` - `USER_DEFINE_OUTCOME("user.define_outcome")` - `class BetaManagedAgentsSessionDeletedEvent:` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_DELETED("session.deleted")` - `class BetaManagedAgentsSessionThreadStatusRunningEvent:` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that started running. - `Type type` - `SESSION_THREAD_STATUS_RUNNING("session.thread_status_running")` - `class BetaManagedAgentsSessionThreadStatusIdleEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that went idle. - `StopReason stopReason` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionRequiresAction:` 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. - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `SESSION_THREAD_STATUS_IDLE("session.thread_status_idle")` - `class BetaManagedAgentsSessionThreadStatusTerminatedEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that terminated. - `Type type` - `SESSION_THREAD_STATUS_TERMINATED("session.thread_status_terminated")` - `class BetaManagedAgentsUserToolResultEvent:` 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. - `String id` Unique identifier for this event. - `String toolUseId` 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 type` - `USER_TOOL_RESULT("user.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `class BetaManagedAgentsSessionThreadStatusRescheduledEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that is retrying. - `Type type` - `SESSION_THREAD_STATUS_RESCHEDULED("session.thread_status_rescheduled")` - `class BetaManagedAgentsSessionUpdatedEvent:` 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. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_UPDATED("session.updated")` - `Optional agent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `Optional multiagent` Resolved coordinator topology with full agent definitions for each roster member. - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `class BetaManagedAgentsMcpToolset:` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `Type type` - `AGENT("agent")` - `long version` - `Optional metadata` 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. - `Optional title` The session's new title. Present only when the update changed it. - `class BetaManagedAgentsSystemMessageEvent:` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `String id` Unique identifier for this event. - `List content` System content blocks. Text-only. - `String text` The text content. - `Type type` - `TEXT("text")` - `Type type` - `SYSTEM_MESSAGE("system.message")` - `Optional processedAt` A timestamp in RFC 3339 format ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.core.http.StreamResponse; import com.anthropic.models.beta.sessions.events.BetaManagedAgentsStreamSessionEvents; import com.anthropic.models.beta.sessions.events.EventStreamParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); StreamResponse betaManagedAgentsStreamSessionEvents = client.beta().sessions().events().streamStreaming("sesn_011CZkZAtmR3yMPDzynEDxu7"); } } ``` #### 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 - `class BetaManagedAgentsAgentCustomToolUseEvent:` 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. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the custom tool being called. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_CUSTOM_TOOL_USE("agent.custom_tool_use")` - `Optional sessionThreadId` 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 - `class BetaManagedAgentsAgentMcpToolResultEvent:` Event representing the result of an MCP tool execution. - `String id` Unique identifier for this event. - `String mcpToolUseId` The id of the `agent.mcp_tool_use` event this result corresponds to. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MCP_TOOL_RESULT("agent.mcp_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. ### Beta Managed Agents Agent MCP Tool Use Event - `class BetaManagedAgentsAgentMcpToolUseEvent:` Event emitted when the agent invokes a tool provided by an MCP server. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String mcpServerName` Name of the MCP server providing the tool. - `String name` Name of the MCP tool being used. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MCP_TOOL_USE("agent.mcp_tool_use")` - `Optional evaluatedPermission` AgentEvaluatedPermission enum - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional sessionThreadId` 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 - `class BetaManagedAgentsAgentMessageEvent:` An agent response event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of text blocks comprising the agent response. - `String text` The text content. - `Type type` - `TEXT("text")` - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MESSAGE("agent.message")` ### Beta Managed Agents Agent Thinking Event - `class BetaManagedAgentsAgentThinkingEvent:` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THINKING("agent.thinking")` ### Beta Managed Agents Agent Thread Context Compacted Event - `class BetaManagedAgentsAgentThreadContextCompactedEvent:` Indicates that context compaction (summarization) occurred during the session. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THREAD_CONTEXT_COMPACTED("agent.thread_context_compacted")` ### Beta Managed Agents Agent Thread Message Received Event - `class BetaManagedAgentsAgentThreadMessageReceivedEvent:` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `String fromSessionThreadId` Public `sthr_` ID of the thread that sent the message. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THREAD_MESSAGE_RECEIVED("agent.thread_message_received")` - `Optional fromAgentName` Name of the callable agent this message came from. Absent when received from the primary agent. ### Beta Managed Agents Agent Thread Message Sent Event - `class BetaManagedAgentsAgentThreadMessageSentEvent:` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String toSessionThreadId` Public `sthr_` ID of the thread the message was sent to. - `Type type` - `AGENT_THREAD_MESSAGE_SENT("agent.thread_message_sent")` - `Optional toAgentName` Name of the callable agent this message was sent to. Absent when sent to the primary agent. ### Beta Managed Agents Agent Tool Result Event - `class BetaManagedAgentsAgentToolResultEvent:` Event representing the result of an agent tool execution. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String toolUseId` The id of the `agent.tool_use` event this result corresponds to. - `Type type` - `AGENT_TOOL_RESULT("agent.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. ### Beta Managed Agents Agent Tool Use Event - `class BetaManagedAgentsAgentToolUseEvent:` Event emitted when the agent invokes a built-in agent tool. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the agent tool being used. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_TOOL_USE("agent.tool_use")` - `Optional evaluatedPermission` AgentEvaluatedPermission enum - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional sessionThreadId` 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 - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` ### Beta Managed Agents Base64 Image Source - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` ### Beta Managed Agents Billing Error - `class BetaManagedAgentsBillingError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` - `Type type` - `BILLING_ERROR("billing_error")` ### Beta Managed Agents Credential Host Unreachable Error - `class BetaManagedAgentsCredentialHostUnreachableError:` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `String credentialId` ID of the affected credential. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` - `Type type` - `CREDENTIAL_HOST_UNREACHABLE_ERROR("credential_host_unreachable_error")` - `String vaultId` ID of the vault containing the affected credential. ### Beta Managed Agents Document Block - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. ### Beta Managed Agents Event Params - `class BetaManagedAgentsEventParams: A class that can be one of several variants.union` Union type for event parameters that can be sent to a session. - `class BetaManagedAgentsUserMessageEventParams:` Parameters for sending a user message to the session. - `List content` Array of content blocks for the user message. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `Type type` - `USER_MESSAGE("user.message")` - `class BetaManagedAgentsUserInterruptEventParams:` Parameters for sending an interrupt to pause the agent. - `Type type` - `USER_INTERRUPT("user.interrupt")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserToolConfirmationEventParams:` Parameters for confirming or denying a tool execution request. - `Result result` UserToolConfirmationResult enum - `ALLOW("allow")` - `DENY("deny")` - `String toolUseId` 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 type` - `USER_TOOL_CONFIRMATION("user.tool_confirmation")` - `Optional denyMessage` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `class BetaManagedAgentsUserCustomToolResultEventParams:` Parameters for providing the result of a custom tool execution. - `String customToolUseId` 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 type` - `USER_CUSTOM_TOOL_RESULT("user.custom_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsUserDefineOutcomeEventParams:` Parameters for defining an outcome the agent should work toward. The agent begins work on receipt. - `String description` What the agent should produce. This is the task specification. - `Rubric rubric` Rubric for grading the quality of an outcome. - `class BetaManagedAgentsFileRubricParams:` Rubric referenced by a file uploaded via the Files API. - `String fileId` ID of the rubric file. - `Type type` - `FILE("file")` - `class BetaManagedAgentsTextRubricParams:` Rubric content provided inline as text. - `String content` Rubric content. Plain text or markdown — the grader treats it as freeform text. Maximum 262144 characters. - `Type type` - `TEXT("text")` - `Type type` - `USER_DEFINE_OUTCOME("user.define_outcome")` - `Optional maxIterations` Eval→revision cycles before giving up. Default 3, max 20. - `class BetaManagedAgentsUserToolResultEventParams:` 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. - `String toolUseId` 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 type` - `USER_TOOL_RESULT("user.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsSystemMessageEventParams:` 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. - `List content` System content blocks to append. Text-only. - `String text` The text content. - `Type type` - `TEXT("text")` - `Type type` - `SYSTEM_MESSAGE("system.message")` ### Beta Managed Agents File Document Source - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` ### Beta Managed Agents File Image Source - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` ### Beta Managed Agents File Rubric - `class BetaManagedAgentsFileRubric:` Rubric referenced by a file uploaded via the Files API. - `String fileId` ID of the rubric file. - `Type type` - `FILE("file")` ### Beta Managed Agents File Rubric Params - `class BetaManagedAgentsFileRubricParams:` Rubric referenced by a file uploaded via the Files API. - `String fileId` ID of the rubric file. - `Type type` - `FILE("file")` ### Beta Managed Agents Image Block - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` ### Beta Managed Agents MCP Authentication Failed Error - `class BetaManagedAgentsMcpAuthenticationFailedError:` Authentication to an MCP server failed. - `String mcpServerName` Name of the MCP server that failed authentication. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` - `Type type` - `MCP_AUTHENTICATION_FAILED_ERROR("mcp_authentication_failed_error")` ### Beta Managed Agents MCP Connection Failed Error - `class BetaManagedAgentsMcpConnectionFailedError:` Failed to connect to an MCP server. - `String mcpServerName` Name of the MCP server that failed to connect. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` - `Type type` - `MCP_CONNECTION_FAILED_ERROR("mcp_connection_failed_error")` ### Beta Managed Agents Model Overloaded Error - `class BetaManagedAgentsModelOverloadedError:` The model is currently overloaded. Emitted after automatic retries are exhausted. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` - `Type type` - `MODEL_OVERLOADED_ERROR("model_overloaded_error")` ### Beta Managed Agents Model Rate Limited Error - `class BetaManagedAgentsModelRateLimitedError:` The model request was rate-limited. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` - `Type type` - `MODEL_RATE_LIMITED_ERROR("model_rate_limited_error")` ### Beta Managed Agents Model Request Failed Error - `class BetaManagedAgentsModelRequestFailedError:` A model request failed for a reason other than overload or rate-limiting. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` - `Type type` - `MODEL_REQUEST_FAILED_ERROR("model_request_failed_error")` ### Beta Managed Agents Plain Text Document Source - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` ### Beta Managed Agents Retry Status Exhausted - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` ### Beta Managed Agents Retry Status Retrying - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` ### Beta Managed Agents Retry Status Terminal - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` ### Beta Managed Agents Search Result Block - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` ### Beta Managed Agents Search Result Citations - `class BetaManagedAgentsSearchResultCitations:` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. ### Beta Managed Agents Search Result Content - `class BetaManagedAgentsSearchResultContent:` Text content within a search result. - `String text` The text content. - `Type type` - `TEXT("text")` ### Beta Managed Agents Send Session Events - `class BetaManagedAgentsSendSessionEvents:` Events that were successfully sent to the session. - `Optional> data` Sent events - `class BetaManagedAgentsUserMessageEvent:` A user message event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of content blocks comprising the user message. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `Type type` - `USER_MESSAGE("user.message")` - `Optional processedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsUserInterruptEvent:` An interrupt event that pauses agent execution and returns control to the user. - `String id` Unique identifier for this event. - `Type type` - `USER_INTERRUPT("user.interrupt")` - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserToolConfirmationEvent:` A tool confirmation event that approves or denies a pending tool execution. - `String id` Unique identifier for this event. - `Result result` UserToolConfirmationResult enum - `ALLOW("allow")` - `DENY("deny")` - `String toolUseId` 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 type` - `USER_TOOL_CONFIRMATION("user.tool_confirmation")` - `Optional denyMessage` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserCustomToolResultEvent:` Event sent by the client providing the result of a custom tool execution. - `String id` Unique identifier for this event. - `String customToolUseId` 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 type` - `USER_CUSTOM_TOOL_RESULT("user.custom_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `class BetaManagedAgentsUserDefineOutcomeEvent:` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `String id` Unique identifier for this event. - `String description` What the agent should produce. Copied from the input event. - `Optional maxIterations` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `String outcomeId` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Rubric rubric` Rubric for grading the quality of an outcome. - `class BetaManagedAgentsFileRubric:` Rubric referenced by a file uploaded via the Files API. - `String fileId` ID of the rubric file. - `Type type` - `FILE("file")` - `class BetaManagedAgentsTextRubric:` Rubric content provided inline as text. - `String content` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type type` - `TEXT("text")` - `Type type` - `USER_DEFINE_OUTCOME("user.define_outcome")` - `class BetaManagedAgentsUserToolResultEvent:` 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. - `String id` Unique identifier for this event. - `String toolUseId` 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 type` - `USER_TOOL_RESULT("user.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `class BetaManagedAgentsSystemMessageEvent:` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `String id` Unique identifier for this event. - `List content` System content blocks. Text-only. - `String text` The text content. - `Type type` - `TEXT("text")` - `Type type` - `SYSTEM_MESSAGE("system.message")` - `Optional processedAt` A timestamp in RFC 3339 format ### Beta Managed Agents Session Deleted Event - `class BetaManagedAgentsSessionDeletedEvent:` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_DELETED("session.deleted")` ### Beta Managed Agents Session End Turn - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `Type type` - `END_TURN("end_turn")` ### Beta Managed Agents Session Error Event - `class BetaManagedAgentsSessionErrorEvent:` An error event indicating a problem occurred during session execution. - `String id` Unique identifier for this event. - `Error error` 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. - `class BetaManagedAgentsUnknownError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` - `Type type` - `UNKNOWN_ERROR("unknown_error")` - `class BetaManagedAgentsModelOverloadedError:` The model is currently overloaded. Emitted after automatic retries are exhausted. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_OVERLOADED_ERROR("model_overloaded_error")` - `class BetaManagedAgentsModelRateLimitedError:` The model request was rate-limited. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_RATE_LIMITED_ERROR("model_rate_limited_error")` - `class BetaManagedAgentsModelRequestFailedError:` A model request failed for a reason other than overload or rate-limiting. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_REQUEST_FAILED_ERROR("model_request_failed_error")` - `class BetaManagedAgentsMcpConnectionFailedError:` Failed to connect to an MCP server. - `String mcpServerName` Name of the MCP server that failed to connect. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MCP_CONNECTION_FAILED_ERROR("mcp_connection_failed_error")` - `class BetaManagedAgentsMcpAuthenticationFailedError:` Authentication to an MCP server failed. - `String mcpServerName` Name of the MCP server that failed authentication. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MCP_AUTHENTICATION_FAILED_ERROR("mcp_authentication_failed_error")` - `class BetaManagedAgentsBillingError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `BILLING_ERROR("billing_error")` - `class BetaManagedAgentsCredentialHostUnreachableError:` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `String credentialId` ID of the affected credential. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `CREDENTIAL_HOST_UNREACHABLE_ERROR("credential_host_unreachable_error")` - `String vaultId` ID of the vault containing the affected credential. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_ERROR("session.error")` ### Beta Managed Agents Session Event - `class BetaManagedAgentsSessionEvent: A class that can be one of several variants.union` Union type for all event types in a session. - `class BetaManagedAgentsUserMessageEvent:` A user message event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of content blocks comprising the user message. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `Type type` - `USER_MESSAGE("user.message")` - `Optional processedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsUserInterruptEvent:` An interrupt event that pauses agent execution and returns control to the user. - `String id` Unique identifier for this event. - `Type type` - `USER_INTERRUPT("user.interrupt")` - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserToolConfirmationEvent:` A tool confirmation event that approves or denies a pending tool execution. - `String id` Unique identifier for this event. - `Result result` UserToolConfirmationResult enum - `ALLOW("allow")` - `DENY("deny")` - `String toolUseId` 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 type` - `USER_TOOL_CONFIRMATION("user.tool_confirmation")` - `Optional denyMessage` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserCustomToolResultEvent:` Event sent by the client providing the result of a custom tool execution. - `String id` Unique identifier for this event. - `String customToolUseId` 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 type` - `USER_CUSTOM_TOOL_RESULT("user.custom_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `class BetaManagedAgentsAgentCustomToolUseEvent:` 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. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the custom tool being called. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_CUSTOM_TOOL_USE("agent.custom_tool_use")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentMessageEvent:` An agent response event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of text blocks comprising the agent response. - `String text` The text content. - `Type type` - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MESSAGE("agent.message")` - `class BetaManagedAgentsAgentThinkingEvent:` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THINKING("agent.thinking")` - `class BetaManagedAgentsAgentMcpToolUseEvent:` Event emitted when the agent invokes a tool provided by an MCP server. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String mcpServerName` Name of the MCP server providing the tool. - `String name` Name of the MCP tool being used. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MCP_TOOL_USE("agent.mcp_tool_use")` - `Optional evaluatedPermission` AgentEvaluatedPermission enum - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentMcpToolResultEvent:` Event representing the result of an MCP tool execution. - `String id` Unique identifier for this event. - `String mcpToolUseId` The id of the `agent.mcp_tool_use` event this result corresponds to. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MCP_TOOL_RESULT("agent.mcp_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsAgentToolUseEvent:` Event emitted when the agent invokes a built-in agent tool. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the agent tool being used. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_TOOL_USE("agent.tool_use")` - `Optional evaluatedPermission` AgentEvaluatedPermission enum - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentToolResultEvent:` Event representing the result of an agent tool execution. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String toolUseId` The id of the `agent.tool_use` event this result corresponds to. - `Type type` - `AGENT_TOOL_RESULT("agent.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsAgentThreadMessageReceivedEvent:` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `String fromSessionThreadId` Public `sthr_` ID of the thread that sent the message. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THREAD_MESSAGE_RECEIVED("agent.thread_message_received")` - `Optional fromAgentName` Name of the callable agent this message came from. Absent when received from the primary agent. - `class BetaManagedAgentsAgentThreadMessageSentEvent:` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String toSessionThreadId` Public `sthr_` ID of the thread the message was sent to. - `Type type` - `AGENT_THREAD_MESSAGE_SENT("agent.thread_message_sent")` - `Optional toAgentName` Name of the callable agent this message was sent to. Absent when sent to the primary agent. - `class BetaManagedAgentsAgentThreadContextCompactedEvent:` Indicates that context compaction (summarization) occurred during the session. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THREAD_CONTEXT_COMPACTED("agent.thread_context_compacted")` - `class BetaManagedAgentsSessionErrorEvent:` An error event indicating a problem occurred during session execution. - `String id` Unique identifier for this event. - `Error error` 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. - `class BetaManagedAgentsUnknownError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` - `Type type` - `UNKNOWN_ERROR("unknown_error")` - `class BetaManagedAgentsModelOverloadedError:` The model is currently overloaded. Emitted after automatic retries are exhausted. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_OVERLOADED_ERROR("model_overloaded_error")` - `class BetaManagedAgentsModelRateLimitedError:` The model request was rate-limited. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_RATE_LIMITED_ERROR("model_rate_limited_error")` - `class BetaManagedAgentsModelRequestFailedError:` A model request failed for a reason other than overload or rate-limiting. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_REQUEST_FAILED_ERROR("model_request_failed_error")` - `class BetaManagedAgentsMcpConnectionFailedError:` Failed to connect to an MCP server. - `String mcpServerName` Name of the MCP server that failed to connect. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MCP_CONNECTION_FAILED_ERROR("mcp_connection_failed_error")` - `class BetaManagedAgentsMcpAuthenticationFailedError:` Authentication to an MCP server failed. - `String mcpServerName` Name of the MCP server that failed authentication. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MCP_AUTHENTICATION_FAILED_ERROR("mcp_authentication_failed_error")` - `class BetaManagedAgentsBillingError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `BILLING_ERROR("billing_error")` - `class BetaManagedAgentsCredentialHostUnreachableError:` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `String credentialId` ID of the affected credential. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `CREDENTIAL_HOST_UNREACHABLE_ERROR("credential_host_unreachable_error")` - `String vaultId` ID of the vault containing the affected credential. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_ERROR("session.error")` - `class BetaManagedAgentsSessionStatusRescheduledEvent:` Indicates the session is recovering from an error state and is rescheduled for execution. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_RESCHEDULED("session.status_rescheduled")` - `class BetaManagedAgentsSessionStatusRunningEvent:` Indicates the session is actively running and the agent is working. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_RUNNING("session.status_running")` - `class BetaManagedAgentsSessionStatusIdleEvent:` Indicates the agent has paused and is awaiting user input. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `StopReason stopReason` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `Type type` - `END_TURN("end_turn")` - `class BetaManagedAgentsSessionRequiresAction:` 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. - `List eventIds` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type type` - `REQUIRES_ACTION("requires_action")` - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `RETRIES_EXHAUSTED("retries_exhausted")` - `Type type` - `SESSION_STATUS_IDLE("session.status_idle")` - `class BetaManagedAgentsSessionStatusTerminatedEvent:` Indicates the session has terminated, either due to an error or completion. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_TERMINATED("session.status_terminated")` - `class BetaManagedAgentsSessionThreadCreatedEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the callable agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public `sthr_` ID of the newly created thread. - `Type type` - `SESSION_THREAD_CREATED("session.thread_created")` - `class BetaManagedAgentsSpanOutcomeEvaluationStartEvent:` Emitted when an outcome evaluation cycle begins. - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_OUTCOME_EVALUATION_START("span.outcome_evaluation_start")` - `class BetaManagedAgentsSpanOutcomeEvaluationEndEvent:` 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. - `String id` Unique identifier for this event. - `String explanation` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `String outcomeEvaluationStartId` The id of the corresponding `span.outcome_evaluation_start` event. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String result` 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 type` - `SPAN_OUTCOME_EVALUATION_END("span.outcome_evaluation_end")` - `BetaManagedAgentsSpanModelUsage usage` Token usage for a single model request. - `long cacheCreationInputTokens` Tokens used to create prompt cache in this request. - `long cacheReadInputTokens` Tokens read from prompt cache in this request. - `long inputTokens` Input tokens consumed by this request. - `long outputTokens` Output tokens generated by this request. - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `class BetaManagedAgentsSpanModelRequestStartEvent:` Emitted when a model request is initiated by the agent. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_MODEL_REQUEST_START("span.model_request_start")` - `class BetaManagedAgentsSpanModelRequestEndEvent:` Emitted when a model request completes. - `String id` Unique identifier for this event. - `Optional isError` Whether the model request resulted in an error. - `String modelRequestStartId` The id of the corresponding `span.model_request_start` event. - `BetaManagedAgentsSpanModelUsage modelUsage` Token usage for a single model request. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_MODEL_REQUEST_END("span.model_request_end")` - `class BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent:` 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. - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_OUTCOME_EVALUATION_ONGOING("span.outcome_evaluation_ongoing")` - `class BetaManagedAgentsUserDefineOutcomeEvent:` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `String id` Unique identifier for this event. - `String description` What the agent should produce. Copied from the input event. - `Optional maxIterations` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `String outcomeId` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Rubric rubric` Rubric for grading the quality of an outcome. - `class BetaManagedAgentsFileRubric:` Rubric referenced by a file uploaded via the Files API. - `String fileId` ID of the rubric file. - `Type type` - `FILE("file")` - `class BetaManagedAgentsTextRubric:` Rubric content provided inline as text. - `String content` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type type` - `TEXT("text")` - `Type type` - `USER_DEFINE_OUTCOME("user.define_outcome")` - `class BetaManagedAgentsSessionDeletedEvent:` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_DELETED("session.deleted")` - `class BetaManagedAgentsSessionThreadStatusRunningEvent:` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that started running. - `Type type` - `SESSION_THREAD_STATUS_RUNNING("session.thread_status_running")` - `class BetaManagedAgentsSessionThreadStatusIdleEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that went idle. - `StopReason stopReason` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionRequiresAction:` 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. - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `SESSION_THREAD_STATUS_IDLE("session.thread_status_idle")` - `class BetaManagedAgentsSessionThreadStatusTerminatedEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that terminated. - `Type type` - `SESSION_THREAD_STATUS_TERMINATED("session.thread_status_terminated")` - `class BetaManagedAgentsUserToolResultEvent:` 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. - `String id` Unique identifier for this event. - `String toolUseId` 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 type` - `USER_TOOL_RESULT("user.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `class BetaManagedAgentsSessionThreadStatusRescheduledEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that is retrying. - `Type type` - `SESSION_THREAD_STATUS_RESCHEDULED("session.thread_status_rescheduled")` - `class BetaManagedAgentsSessionUpdatedEvent:` 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. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_UPDATED("session.updated")` - `Optional agent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `Optional multiagent` Resolved coordinator topology with full agent definitions for each roster member. - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `class BetaManagedAgentsMcpToolset:` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `Type type` - `AGENT("agent")` - `long version` - `Optional metadata` 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. - `Optional title` The session's new title. Present only when the update changed it. - `class BetaManagedAgentsSystemMessageEvent:` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `String id` Unique identifier for this event. - `List content` System content blocks. Text-only. - `String text` The text content. - `Type type` - `TEXT("text")` - `Type type` - `SYSTEM_MESSAGE("system.message")` - `Optional processedAt` A timestamp in RFC 3339 format ### Beta Managed Agents Session Requires Action - `class BetaManagedAgentsSessionRequiresAction:` 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. - `List eventIds` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type type` - `REQUIRES_ACTION("requires_action")` ### Beta Managed Agents Session Retries Exhausted - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `RETRIES_EXHAUSTED("retries_exhausted")` ### Beta Managed Agents Session Status Idle Event - `class BetaManagedAgentsSessionStatusIdleEvent:` Indicates the agent has paused and is awaiting user input. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `StopReason stopReason` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `Type type` - `END_TURN("end_turn")` - `class BetaManagedAgentsSessionRequiresAction:` 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. - `List eventIds` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type type` - `REQUIRES_ACTION("requires_action")` - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `RETRIES_EXHAUSTED("retries_exhausted")` - `Type type` - `SESSION_STATUS_IDLE("session.status_idle")` ### Beta Managed Agents Session Status Rescheduled Event - `class BetaManagedAgentsSessionStatusRescheduledEvent:` Indicates the session is recovering from an error state and is rescheduled for execution. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_RESCHEDULED("session.status_rescheduled")` ### Beta Managed Agents Session Status Running Event - `class BetaManagedAgentsSessionStatusRunningEvent:` Indicates the session is actively running and the agent is working. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_RUNNING("session.status_running")` ### Beta Managed Agents Session Status Terminated Event - `class BetaManagedAgentsSessionStatusTerminatedEvent:` Indicates the session has terminated, either due to an error or completion. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_TERMINATED("session.status_terminated")` ### Beta Managed Agents Session Thread Created Event - `class BetaManagedAgentsSessionThreadCreatedEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the callable agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public `sthr_` ID of the newly created thread. - `Type type` - `SESSION_THREAD_CREATED("session.thread_created")` ### Beta Managed Agents Session Thread Status Idle Event - `class BetaManagedAgentsSessionThreadStatusIdleEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that went idle. - `StopReason stopReason` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `Type type` - `END_TURN("end_turn")` - `class BetaManagedAgentsSessionRequiresAction:` 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. - `List eventIds` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type type` - `REQUIRES_ACTION("requires_action")` - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `RETRIES_EXHAUSTED("retries_exhausted")` - `Type type` - `SESSION_THREAD_STATUS_IDLE("session.thread_status_idle")` ### Beta Managed Agents Session Thread Status Rescheduled Event - `class BetaManagedAgentsSessionThreadStatusRescheduledEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that is retrying. - `Type type` - `SESSION_THREAD_STATUS_RESCHEDULED("session.thread_status_rescheduled")` ### Beta Managed Agents Session Thread Status Running Event - `class BetaManagedAgentsSessionThreadStatusRunningEvent:` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that started running. - `Type type` - `SESSION_THREAD_STATUS_RUNNING("session.thread_status_running")` ### Beta Managed Agents Session Thread Status Terminated Event - `class BetaManagedAgentsSessionThreadStatusTerminatedEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that terminated. - `Type type` - `SESSION_THREAD_STATUS_TERMINATED("session.thread_status_terminated")` ### Beta Managed Agents Span Model Request End Event - `class BetaManagedAgentsSpanModelRequestEndEvent:` Emitted when a model request completes. - `String id` Unique identifier for this event. - `Optional isError` Whether the model request resulted in an error. - `String modelRequestStartId` The id of the corresponding `span.model_request_start` event. - `BetaManagedAgentsSpanModelUsage modelUsage` Token usage for a single model request. - `long cacheCreationInputTokens` Tokens used to create prompt cache in this request. - `long cacheReadInputTokens` Tokens read from prompt cache in this request. - `long inputTokens` Input tokens consumed by this request. - `long outputTokens` Output tokens generated by this request. - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_MODEL_REQUEST_END("span.model_request_end")` ### Beta Managed Agents Span Model Request Start Event - `class BetaManagedAgentsSpanModelRequestStartEvent:` Emitted when a model request is initiated by the agent. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_MODEL_REQUEST_START("span.model_request_start")` ### Beta Managed Agents Span Model Usage - `class BetaManagedAgentsSpanModelUsage:` Token usage for a single model request. - `long cacheCreationInputTokens` Tokens used to create prompt cache in this request. - `long cacheReadInputTokens` Tokens read from prompt cache in this request. - `long inputTokens` Input tokens consumed by this request. - `long outputTokens` Output tokens generated by this request. - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` ### Beta Managed Agents Span Outcome Evaluation End Event - `class BetaManagedAgentsSpanOutcomeEvaluationEndEvent:` 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. - `String id` Unique identifier for this event. - `String explanation` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `String outcomeEvaluationStartId` The id of the corresponding `span.outcome_evaluation_start` event. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String result` 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 type` - `SPAN_OUTCOME_EVALUATION_END("span.outcome_evaluation_end")` - `BetaManagedAgentsSpanModelUsage usage` Token usage for a single model request. - `long cacheCreationInputTokens` Tokens used to create prompt cache in this request. - `long cacheReadInputTokens` Tokens read from prompt cache in this request. - `long inputTokens` Input tokens consumed by this request. - `long outputTokens` Output tokens generated by this request. - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` ### Beta Managed Agents Span Outcome Evaluation Ongoing Event - `class BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent:` 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. - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_OUTCOME_EVALUATION_ONGOING("span.outcome_evaluation_ongoing")` ### Beta Managed Agents Span Outcome Evaluation Start Event - `class BetaManagedAgentsSpanOutcomeEvaluationStartEvent:` Emitted when an outcome evaluation cycle begins. - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_OUTCOME_EVALUATION_START("span.outcome_evaluation_start")` ### Beta Managed Agents Stream Session Events - `class BetaManagedAgentsStreamSessionEvents: A class that can be one of several variants.union` Server-sent event in the session stream. - `class BetaManagedAgentsUserMessageEvent:` A user message event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of content blocks comprising the user message. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `Type type` - `USER_MESSAGE("user.message")` - `Optional processedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsUserInterruptEvent:` An interrupt event that pauses agent execution and returns control to the user. - `String id` Unique identifier for this event. - `Type type` - `USER_INTERRUPT("user.interrupt")` - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserToolConfirmationEvent:` A tool confirmation event that approves or denies a pending tool execution. - `String id` Unique identifier for this event. - `Result result` UserToolConfirmationResult enum - `ALLOW("allow")` - `DENY("deny")` - `String toolUseId` 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 type` - `USER_TOOL_CONFIRMATION("user.tool_confirmation")` - `Optional denyMessage` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserCustomToolResultEvent:` Event sent by the client providing the result of a custom tool execution. - `String id` Unique identifier for this event. - `String customToolUseId` 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 type` - `USER_CUSTOM_TOOL_RESULT("user.custom_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `class BetaManagedAgentsAgentCustomToolUseEvent:` 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. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the custom tool being called. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_CUSTOM_TOOL_USE("agent.custom_tool_use")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentMessageEvent:` An agent response event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of text blocks comprising the agent response. - `String text` The text content. - `Type type` - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MESSAGE("agent.message")` - `class BetaManagedAgentsAgentThinkingEvent:` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THINKING("agent.thinking")` - `class BetaManagedAgentsAgentMcpToolUseEvent:` Event emitted when the agent invokes a tool provided by an MCP server. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String mcpServerName` Name of the MCP server providing the tool. - `String name` Name of the MCP tool being used. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MCP_TOOL_USE("agent.mcp_tool_use")` - `Optional evaluatedPermission` AgentEvaluatedPermission enum - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentMcpToolResultEvent:` Event representing the result of an MCP tool execution. - `String id` Unique identifier for this event. - `String mcpToolUseId` The id of the `agent.mcp_tool_use` event this result corresponds to. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MCP_TOOL_RESULT("agent.mcp_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsAgentToolUseEvent:` Event emitted when the agent invokes a built-in agent tool. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the agent tool being used. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_TOOL_USE("agent.tool_use")` - `Optional evaluatedPermission` AgentEvaluatedPermission enum - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentToolResultEvent:` Event representing the result of an agent tool execution. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String toolUseId` The id of the `agent.tool_use` event this result corresponds to. - `Type type` - `AGENT_TOOL_RESULT("agent.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsAgentThreadMessageReceivedEvent:` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `String fromSessionThreadId` Public `sthr_` ID of the thread that sent the message. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THREAD_MESSAGE_RECEIVED("agent.thread_message_received")` - `Optional fromAgentName` Name of the callable agent this message came from. Absent when received from the primary agent. - `class BetaManagedAgentsAgentThreadMessageSentEvent:` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String toSessionThreadId` Public `sthr_` ID of the thread the message was sent to. - `Type type` - `AGENT_THREAD_MESSAGE_SENT("agent.thread_message_sent")` - `Optional toAgentName` Name of the callable agent this message was sent to. Absent when sent to the primary agent. - `class BetaManagedAgentsAgentThreadContextCompactedEvent:` Indicates that context compaction (summarization) occurred during the session. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THREAD_CONTEXT_COMPACTED("agent.thread_context_compacted")` - `class BetaManagedAgentsSessionErrorEvent:` An error event indicating a problem occurred during session execution. - `String id` Unique identifier for this event. - `Error error` 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. - `class BetaManagedAgentsUnknownError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` - `Type type` - `UNKNOWN_ERROR("unknown_error")` - `class BetaManagedAgentsModelOverloadedError:` The model is currently overloaded. Emitted after automatic retries are exhausted. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_OVERLOADED_ERROR("model_overloaded_error")` - `class BetaManagedAgentsModelRateLimitedError:` The model request was rate-limited. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_RATE_LIMITED_ERROR("model_rate_limited_error")` - `class BetaManagedAgentsModelRequestFailedError:` A model request failed for a reason other than overload or rate-limiting. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_REQUEST_FAILED_ERROR("model_request_failed_error")` - `class BetaManagedAgentsMcpConnectionFailedError:` Failed to connect to an MCP server. - `String mcpServerName` Name of the MCP server that failed to connect. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MCP_CONNECTION_FAILED_ERROR("mcp_connection_failed_error")` - `class BetaManagedAgentsMcpAuthenticationFailedError:` Authentication to an MCP server failed. - `String mcpServerName` Name of the MCP server that failed authentication. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MCP_AUTHENTICATION_FAILED_ERROR("mcp_authentication_failed_error")` - `class BetaManagedAgentsBillingError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `BILLING_ERROR("billing_error")` - `class BetaManagedAgentsCredentialHostUnreachableError:` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `String credentialId` ID of the affected credential. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `CREDENTIAL_HOST_UNREACHABLE_ERROR("credential_host_unreachable_error")` - `String vaultId` ID of the vault containing the affected credential. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_ERROR("session.error")` - `class BetaManagedAgentsSessionStatusRescheduledEvent:` Indicates the session is recovering from an error state and is rescheduled for execution. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_RESCHEDULED("session.status_rescheduled")` - `class BetaManagedAgentsSessionStatusRunningEvent:` Indicates the session is actively running and the agent is working. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_RUNNING("session.status_running")` - `class BetaManagedAgentsSessionStatusIdleEvent:` Indicates the agent has paused and is awaiting user input. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `StopReason stopReason` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `Type type` - `END_TURN("end_turn")` - `class BetaManagedAgentsSessionRequiresAction:` 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. - `List eventIds` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type type` - `REQUIRES_ACTION("requires_action")` - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `RETRIES_EXHAUSTED("retries_exhausted")` - `Type type` - `SESSION_STATUS_IDLE("session.status_idle")` - `class BetaManagedAgentsSessionStatusTerminatedEvent:` Indicates the session has terminated, either due to an error or completion. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_TERMINATED("session.status_terminated")` - `class BetaManagedAgentsSessionThreadCreatedEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the callable agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public `sthr_` ID of the newly created thread. - `Type type` - `SESSION_THREAD_CREATED("session.thread_created")` - `class BetaManagedAgentsSpanOutcomeEvaluationStartEvent:` Emitted when an outcome evaluation cycle begins. - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_OUTCOME_EVALUATION_START("span.outcome_evaluation_start")` - `class BetaManagedAgentsSpanOutcomeEvaluationEndEvent:` 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. - `String id` Unique identifier for this event. - `String explanation` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `String outcomeEvaluationStartId` The id of the corresponding `span.outcome_evaluation_start` event. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String result` 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 type` - `SPAN_OUTCOME_EVALUATION_END("span.outcome_evaluation_end")` - `BetaManagedAgentsSpanModelUsage usage` Token usage for a single model request. - `long cacheCreationInputTokens` Tokens used to create prompt cache in this request. - `long cacheReadInputTokens` Tokens read from prompt cache in this request. - `long inputTokens` Input tokens consumed by this request. - `long outputTokens` Output tokens generated by this request. - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `class BetaManagedAgentsSpanModelRequestStartEvent:` Emitted when a model request is initiated by the agent. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_MODEL_REQUEST_START("span.model_request_start")` - `class BetaManagedAgentsSpanModelRequestEndEvent:` Emitted when a model request completes. - `String id` Unique identifier for this event. - `Optional isError` Whether the model request resulted in an error. - `String modelRequestStartId` The id of the corresponding `span.model_request_start` event. - `BetaManagedAgentsSpanModelUsage modelUsage` Token usage for a single model request. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_MODEL_REQUEST_END("span.model_request_end")` - `class BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent:` 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. - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_OUTCOME_EVALUATION_ONGOING("span.outcome_evaluation_ongoing")` - `class BetaManagedAgentsUserDefineOutcomeEvent:` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `String id` Unique identifier for this event. - `String description` What the agent should produce. Copied from the input event. - `Optional maxIterations` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `String outcomeId` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Rubric rubric` Rubric for grading the quality of an outcome. - `class BetaManagedAgentsFileRubric:` Rubric referenced by a file uploaded via the Files API. - `String fileId` ID of the rubric file. - `Type type` - `FILE("file")` - `class BetaManagedAgentsTextRubric:` Rubric content provided inline as text. - `String content` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type type` - `TEXT("text")` - `Type type` - `USER_DEFINE_OUTCOME("user.define_outcome")` - `class BetaManagedAgentsSessionDeletedEvent:` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_DELETED("session.deleted")` - `class BetaManagedAgentsSessionThreadStatusRunningEvent:` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that started running. - `Type type` - `SESSION_THREAD_STATUS_RUNNING("session.thread_status_running")` - `class BetaManagedAgentsSessionThreadStatusIdleEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that went idle. - `StopReason stopReason` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionRequiresAction:` 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. - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `SESSION_THREAD_STATUS_IDLE("session.thread_status_idle")` - `class BetaManagedAgentsSessionThreadStatusTerminatedEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that terminated. - `Type type` - `SESSION_THREAD_STATUS_TERMINATED("session.thread_status_terminated")` - `class BetaManagedAgentsUserToolResultEvent:` 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. - `String id` Unique identifier for this event. - `String toolUseId` 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 type` - `USER_TOOL_RESULT("user.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `class BetaManagedAgentsSessionThreadStatusRescheduledEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that is retrying. - `Type type` - `SESSION_THREAD_STATUS_RESCHEDULED("session.thread_status_rescheduled")` - `class BetaManagedAgentsSessionUpdatedEvent:` 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. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_UPDATED("session.updated")` - `Optional agent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `Optional multiagent` Resolved coordinator topology with full agent definitions for each roster member. - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `class BetaManagedAgentsMcpToolset:` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `Type type` - `AGENT("agent")` - `long version` - `Optional metadata` 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. - `Optional title` The session's new title. Present only when the update changed it. - `class BetaManagedAgentsSystemMessageEvent:` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `String id` Unique identifier for this event. - `List content` System content blocks. Text-only. - `String text` The text content. - `Type type` - `TEXT("text")` - `Type type` - `SYSTEM_MESSAGE("system.message")` - `Optional processedAt` A timestamp in RFC 3339 format ### Beta Managed Agents System Message Event Params - `class BetaManagedAgentsSystemMessageEventParams:` 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. - `List content` System content blocks to append. Text-only. - `String text` The text content. - `Type type` - `TEXT("text")` - `Type type` - `SYSTEM_MESSAGE("system.message")` ### Beta Managed Agents Text Block - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` ### Beta Managed Agents Text Rubric - `class BetaManagedAgentsTextRubric:` Rubric content provided inline as text. - `String content` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type type` - `TEXT("text")` ### Beta Managed Agents Text Rubric Params - `class BetaManagedAgentsTextRubricParams:` Rubric content provided inline as text. - `String content` Rubric content. Plain text or markdown — the grader treats it as freeform text. Maximum 262144 characters. - `Type type` - `TEXT("text")` ### Beta Managed Agents Unknown Error - `class BetaManagedAgentsUnknownError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` - `Type type` - `UNKNOWN_ERROR("unknown_error")` ### Beta Managed Agents URL Document Source - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. ### Beta Managed Agents URL Image Source - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. ### Beta Managed Agents User Custom Tool Result Event - `class BetaManagedAgentsUserCustomToolResultEvent:` Event sent by the client providing the result of a custom tool execution. - `String id` Unique identifier for this event. - `String customToolUseId` 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 type` - `USER_CUSTOM_TOOL_RESULT("user.custom_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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 - `class BetaManagedAgentsUserCustomToolResultEventParams:` Parameters for providing the result of a custom tool execution. - `String customToolUseId` 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 type` - `USER_CUSTOM_TOOL_RESULT("user.custom_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. ### Beta Managed Agents User Define Outcome Event - `class BetaManagedAgentsUserDefineOutcomeEvent:` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `String id` Unique identifier for this event. - `String description` What the agent should produce. Copied from the input event. - `Optional maxIterations` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `String outcomeId` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Rubric rubric` Rubric for grading the quality of an outcome. - `class BetaManagedAgentsFileRubric:` Rubric referenced by a file uploaded via the Files API. - `String fileId` ID of the rubric file. - `Type type` - `FILE("file")` - `class BetaManagedAgentsTextRubric:` Rubric content provided inline as text. - `String content` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type type` - `TEXT("text")` - `Type type` - `USER_DEFINE_OUTCOME("user.define_outcome")` ### Beta Managed Agents User Define Outcome Event Params - `class BetaManagedAgentsUserDefineOutcomeEventParams:` Parameters for defining an outcome the agent should work toward. The agent begins work on receipt. - `String description` What the agent should produce. This is the task specification. - `Rubric rubric` Rubric for grading the quality of an outcome. - `class BetaManagedAgentsFileRubricParams:` Rubric referenced by a file uploaded via the Files API. - `String fileId` ID of the rubric file. - `Type type` - `FILE("file")` - `class BetaManagedAgentsTextRubricParams:` Rubric content provided inline as text. - `String content` Rubric content. Plain text or markdown — the grader treats it as freeform text. Maximum 262144 characters. - `Type type` - `TEXT("text")` - `Type type` - `USER_DEFINE_OUTCOME("user.define_outcome")` - `Optional maxIterations` Eval→revision cycles before giving up. Default 3, max 20. ### Beta Managed Agents User Interrupt Event - `class BetaManagedAgentsUserInterruptEvent:` An interrupt event that pauses agent execution and returns control to the user. - `String id` Unique identifier for this event. - `Type type` - `USER_INTERRUPT("user.interrupt")` - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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 - `class BetaManagedAgentsUserInterruptEventParams:` Parameters for sending an interrupt to pause the agent. - `Type type` - `USER_INTERRUPT("user.interrupt")` - `Optional sessionThreadId` 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 - `class BetaManagedAgentsUserMessageEvent:` A user message event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of content blocks comprising the user message. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `Type type` - `USER_MESSAGE("user.message")` - `Optional processedAt` A timestamp in RFC 3339 format ### Beta Managed Agents User Message Event Params - `class BetaManagedAgentsUserMessageEventParams:` Parameters for sending a user message to the session. - `List content` Array of content blocks for the user message. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `Type type` - `USER_MESSAGE("user.message")` ### Beta Managed Agents User Tool Confirmation Event - `class BetaManagedAgentsUserToolConfirmationEvent:` A tool confirmation event that approves or denies a pending tool execution. - `String id` Unique identifier for this event. - `Result result` UserToolConfirmationResult enum - `ALLOW("allow")` - `DENY("deny")` - `String toolUseId` 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 type` - `USER_TOOL_CONFIRMATION("user.tool_confirmation")` - `Optional denyMessage` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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 - `class BetaManagedAgentsUserToolConfirmationEventParams:` Parameters for confirming or denying a tool execution request. - `Result result` UserToolConfirmationResult enum - `ALLOW("allow")` - `DENY("deny")` - `String toolUseId` 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 type` - `USER_TOOL_CONFIRMATION("user.tool_confirmation")` - `Optional denyMessage` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. ### Beta Managed Agents User Tool Result Event Params - `class BetaManagedAgentsUserToolResultEventParams:` 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. - `String toolUseId` 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 type` - `USER_TOOL_RESULT("user.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. # Resources ## Add Session Resource `BetaManagedAgentsFileResource beta().sessions().resources().add(ResourceAddParamsparams, RequestOptionsrequestOptions = RequestOptions.none())` **post** `/v1/sessions/{session_id}/resources` Add Session Resource ### Parameters - `ResourceAddParams params` - `Optional sessionId` - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` - `BetaManagedAgentsFileResourceParams betaManagedAgentsFileResourceParams` Mount a file uploaded via the Files API into the session. ### Returns - `class BetaManagedAgentsFileResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String fileId` - `String mountPath` - `Type type` - `FILE("file")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.BetaManagedAgentsFileResourceParams; import com.anthropic.models.beta.sessions.resources.BetaManagedAgentsFileResource; import com.anthropic.models.beta.sessions.resources.ResourceAddParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); ResourceAddParams params = ResourceAddParams.builder() .sessionId("sesn_011CZkZAtmR3yMPDzynEDxu7") .betaManagedAgentsFileResourceParams(BetaManagedAgentsFileResourceParams.builder() .fileId("file_011CNha8iCJcU1wXNR6q4V8w") .type(BetaManagedAgentsFileResourceParams.Type.FILE) .build()) .build(); BetaManagedAgentsFileResource betaManagedAgentsFileResource = client.beta().sessions().resources().add(params); } } ``` #### 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 `ResourceListPage beta().sessions().resources().list(ResourceListParamsparams = ResourceListParams.none(), RequestOptionsrequestOptions = RequestOptions.none())` **get** `/v1/sessions/{session_id}/resources` List Session Resources ### Parameters - `ResourceListParams params` - `Optional sessionId` - `Optional limit` Maximum number of resources to return per page (max 1000). If omitted, returns all resources. - `Optional page` Opaque cursor from a previous response's next_page field. - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` ### Returns - `class BetaManagedAgentsSessionResource: A class that can be one of several variants.union` A memory store attached to an agent session. - `class BetaManagedAgentsGitHubRepositoryResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String mountPath` - `Type type` - `GITHUB_REPOSITORY("github_repository")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `String url` - `Optional checkout` - `class BetaManagedAgentsBranchCheckout:` - `String name` Branch name to check out. - `Type type` - `BRANCH("branch")` - `class BetaManagedAgentsCommitCheckout:` - `String sha` Full commit SHA to check out. - `Type type` - `COMMIT("commit")` - `class BetaManagedAgentsFileResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String fileId` - `String mountPath` - `Type type` - `FILE("file")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsMemoryStoreResource:` A memory store attached to an agent session. - `String memoryStoreId` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type type` - `MEMORY_STORE("memory_store")` - `Optional access` Access mode for an attached memory store. - `READ_WRITE("read_write")` - `READ_ONLY("read_only")` - `Optional description` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Optional instructions` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `Optional mountPath` 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. - `Optional name` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.resources.ResourceListPage; import com.anthropic.models.beta.sessions.resources.ResourceListParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); ResourceListPage page = client.beta().sessions().resources().list("sesn_011CZkZAtmR3yMPDzynEDxu7"); } } ``` #### 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 `ResourceRetrieveResponse beta().sessions().resources().retrieve(ResourceRetrieveParamsparams, RequestOptionsrequestOptions = RequestOptions.none())` **get** `/v1/sessions/{session_id}/resources/{resource_id}` Get Session Resource ### Parameters - `ResourceRetrieveParams params` - `String sessionId` - `Optional resourceId` - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` ### Returns - `class ResourceRetrieveResponse: A class that can be one of several variants.union` The requested session resource. - `class BetaManagedAgentsGitHubRepositoryResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String mountPath` - `Type type` - `GITHUB_REPOSITORY("github_repository")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `String url` - `Optional checkout` - `class BetaManagedAgentsBranchCheckout:` - `String name` Branch name to check out. - `Type type` - `BRANCH("branch")` - `class BetaManagedAgentsCommitCheckout:` - `String sha` Full commit SHA to check out. - `Type type` - `COMMIT("commit")` - `class BetaManagedAgentsFileResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String fileId` - `String mountPath` - `Type type` - `FILE("file")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsMemoryStoreResource:` A memory store attached to an agent session. - `String memoryStoreId` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type type` - `MEMORY_STORE("memory_store")` - `Optional access` Access mode for an attached memory store. - `READ_WRITE("read_write")` - `READ_ONLY("read_only")` - `Optional description` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Optional instructions` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `Optional mountPath` 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. - `Optional name` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.resources.ResourceRetrieveParams; import com.anthropic.models.beta.sessions.resources.ResourceRetrieveResponse; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); ResourceRetrieveParams params = ResourceRetrieveParams.builder() .sessionId("sesn_011CZkZAtmR3yMPDzynEDxu7") .resourceId("sesrsc_011CZkZBJq5dWxk9fVLNcPht") .build(); ResourceRetrieveResponse resource = client.beta().sessions().resources().retrieve(params); } } ``` #### 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 `ResourceUpdateResponse beta().sessions().resources().update(ResourceUpdateParamsparams, RequestOptionsrequestOptions = RequestOptions.none())` **post** `/v1/sessions/{session_id}/resources/{resource_id}` Update Session Resource ### Parameters - `ResourceUpdateParams params` - `String sessionId` - `Optional resourceId` - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` - `String authorizationToken` New authorization token for the resource. Currently only `github_repository` resources support token rotation. ### Returns - `class ResourceUpdateResponse: A class that can be one of several variants.union` The updated session resource. - `class BetaManagedAgentsGitHubRepositoryResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String mountPath` - `Type type` - `GITHUB_REPOSITORY("github_repository")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `String url` - `Optional checkout` - `class BetaManagedAgentsBranchCheckout:` - `String name` Branch name to check out. - `Type type` - `BRANCH("branch")` - `class BetaManagedAgentsCommitCheckout:` - `String sha` Full commit SHA to check out. - `Type type` - `COMMIT("commit")` - `class BetaManagedAgentsFileResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String fileId` - `String mountPath` - `Type type` - `FILE("file")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsMemoryStoreResource:` A memory store attached to an agent session. - `String memoryStoreId` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type type` - `MEMORY_STORE("memory_store")` - `Optional access` Access mode for an attached memory store. - `READ_WRITE("read_write")` - `READ_ONLY("read_only")` - `Optional description` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Optional instructions` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `Optional mountPath` 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. - `Optional name` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.resources.ResourceUpdateParams; import com.anthropic.models.beta.sessions.resources.ResourceUpdateResponse; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); ResourceUpdateParams params = ResourceUpdateParams.builder() .sessionId("sesn_011CZkZAtmR3yMPDzynEDxu7") .resourceId("sesrsc_011CZkZBJq5dWxk9fVLNcPht") .authorizationToken("ghp_exampletoken") .build(); ResourceUpdateResponse resource = client.beta().sessions().resources().update(params); } } ``` #### 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 `BetaManagedAgentsDeleteSessionResource beta().sessions().resources().delete(ResourceDeleteParamsparams, RequestOptionsrequestOptions = RequestOptions.none())` **delete** `/v1/sessions/{session_id}/resources/{resource_id}` Delete Session Resource ### Parameters - `ResourceDeleteParams params` - `String sessionId` - `Optional resourceId` - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` ### Returns - `class BetaManagedAgentsDeleteSessionResource:` Confirmation of resource deletion. - `String id` - `Type type` - `SESSION_RESOURCE_DELETED("session_resource_deleted")` ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.resources.BetaManagedAgentsDeleteSessionResource; import com.anthropic.models.beta.sessions.resources.ResourceDeleteParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); ResourceDeleteParams params = ResourceDeleteParams.builder() .sessionId("sesn_011CZkZAtmR3yMPDzynEDxu7") .resourceId("sesrsc_011CZkZBJq5dWxk9fVLNcPht") .build(); BetaManagedAgentsDeleteSessionResource betaManagedAgentsDeleteSessionResource = client.beta().sessions().resources().delete(params); } } ``` #### Response ```json { "id": "sesrsc_011CZkZBJq5dWxk9fVLNcPht", "type": "session_resource_deleted" } ``` ## Domain Types ### Beta Managed Agents Delete Session Resource - `class BetaManagedAgentsDeleteSessionResource:` Confirmation of resource deletion. - `String id` - `Type type` - `SESSION_RESOURCE_DELETED("session_resource_deleted")` ### Beta Managed Agents File Resource - `class BetaManagedAgentsFileResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String fileId` - `String mountPath` - `Type type` - `FILE("file")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format ### Beta Managed Agents GitHub Repository Resource - `class BetaManagedAgentsGitHubRepositoryResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String mountPath` - `Type type` - `GITHUB_REPOSITORY("github_repository")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `String url` - `Optional checkout` - `class BetaManagedAgentsBranchCheckout:` - `String name` Branch name to check out. - `Type type` - `BRANCH("branch")` - `class BetaManagedAgentsCommitCheckout:` - `String sha` Full commit SHA to check out. - `Type type` - `COMMIT("commit")` ### Beta Managed Agents Memory Store Resource - `class BetaManagedAgentsMemoryStoreResource:` A memory store attached to an agent session. - `String memoryStoreId` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type type` - `MEMORY_STORE("memory_store")` - `Optional access` Access mode for an attached memory store. - `READ_WRITE("read_write")` - `READ_ONLY("read_only")` - `Optional description` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Optional instructions` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `Optional mountPath` 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. - `Optional name` 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 - `class BetaManagedAgentsSessionResource: A class that can be one of several variants.union` A memory store attached to an agent session. - `class BetaManagedAgentsGitHubRepositoryResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String mountPath` - `Type type` - `GITHUB_REPOSITORY("github_repository")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `String url` - `Optional checkout` - `class BetaManagedAgentsBranchCheckout:` - `String name` Branch name to check out. - `Type type` - `BRANCH("branch")` - `class BetaManagedAgentsCommitCheckout:` - `String sha` Full commit SHA to check out. - `Type type` - `COMMIT("commit")` - `class BetaManagedAgentsFileResource:` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `String fileId` - `String mountPath` - `Type type` - `FILE("file")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsMemoryStoreResource:` A memory store attached to an agent session. - `String memoryStoreId` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Type type` - `MEMORY_STORE("memory_store")` - `Optional access` Access mode for an attached memory store. - `READ_WRITE("read_write")` - `READ_ONLY("read_only")` - `Optional description` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Optional instructions` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. - `Optional mountPath` 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. - `Optional name` 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 `ThreadListPage beta().sessions().threads().list(ThreadListParamsparams = ThreadListParams.none(), RequestOptionsrequestOptions = RequestOptions.none())` **get** `/v1/sessions/{session_id}/threads` List Session Threads ### Parameters - `ThreadListParams params` - `Optional sessionId` - `Optional limit` Maximum results per page. Defaults to 1000. - `Optional page` Opaque pagination cursor from a previous response's next_page. Forward-only. - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` ### Returns - `class BetaManagedAgentsSessionThread:` An execution thread within a `session`. Each session has one primary thread plus zero or more child threads spawned by the coordinator. - `String id` Unique identifier for this thread. - `BetaManagedAgentsSessionThreadAgent agent` 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`. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Optional archivedAt` A timestamp in RFC 3339 format - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `Optional parentThreadId` Parent thread that spawned this thread. Null for the primary thread. - `String sessionId` The session this thread belongs to. - `Optional stats` Timing statistics for a session thread. - `Optional activeSeconds` Cumulative time in seconds the thread spent actively running. Excludes idle time. - `Optional durationSeconds` Elapsed time since thread creation in seconds. For archived threads, frozen at the final update. - `Optional startupSeconds` Time in seconds for the thread to begin running. Zero for child threads, which start immediately. - `BetaManagedAgentsSessionThreadStatus status` SessionThreadStatus enum - `RUNNING("running")` - `IDLE("idle")` - `RESCHEDULING("rescheduling")` - `TERMINATED("terminated")` - `Type type` - `SESSION_THREAD("session_thread")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `Optional usage` Cumulative token usage for a session thread across all turns. - `Optional cacheCreation` Prompt-cache creation token usage broken down by cache lifetime. - `Optional ephemeral1hInputTokens` Tokens used to create 1-hour ephemeral cache entries. - `Optional ephemeral5mInputTokens` Tokens used to create 5-minute ephemeral cache entries. - `Optional cacheReadInputTokens` Total tokens read from prompt cache. - `Optional inputTokens` Total input tokens consumed across all turns. - `Optional outputTokens` Total output tokens generated across all turns. ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.threads.ThreadListPage; import com.anthropic.models.beta.sessions.threads.ThreadListParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); ThreadListPage page = client.beta().sessions().threads().list("sesn_011CZkZAtmR3yMPDzynEDxu7"); } } ``` #### 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 `BetaManagedAgentsSessionThread beta().sessions().threads().retrieve(ThreadRetrieveParamsparams, RequestOptionsrequestOptions = RequestOptions.none())` **get** `/v1/sessions/{session_id}/threads/{thread_id}` Get Session Thread ### Parameters - `ThreadRetrieveParams params` - `String sessionId` - `Optional threadId` - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` ### Returns - `class BetaManagedAgentsSessionThread:` An execution thread within a `session`. Each session has one primary thread plus zero or more child threads spawned by the coordinator. - `String id` Unique identifier for this thread. - `BetaManagedAgentsSessionThreadAgent agent` 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`. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Optional archivedAt` A timestamp in RFC 3339 format - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `Optional parentThreadId` Parent thread that spawned this thread. Null for the primary thread. - `String sessionId` The session this thread belongs to. - `Optional stats` Timing statistics for a session thread. - `Optional activeSeconds` Cumulative time in seconds the thread spent actively running. Excludes idle time. - `Optional durationSeconds` Elapsed time since thread creation in seconds. For archived threads, frozen at the final update. - `Optional startupSeconds` Time in seconds for the thread to begin running. Zero for child threads, which start immediately. - `BetaManagedAgentsSessionThreadStatus status` SessionThreadStatus enum - `RUNNING("running")` - `IDLE("idle")` - `RESCHEDULING("rescheduling")` - `TERMINATED("terminated")` - `Type type` - `SESSION_THREAD("session_thread")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `Optional usage` Cumulative token usage for a session thread across all turns. - `Optional cacheCreation` Prompt-cache creation token usage broken down by cache lifetime. - `Optional ephemeral1hInputTokens` Tokens used to create 1-hour ephemeral cache entries. - `Optional ephemeral5mInputTokens` Tokens used to create 5-minute ephemeral cache entries. - `Optional cacheReadInputTokens` Total tokens read from prompt cache. - `Optional inputTokens` Total input tokens consumed across all turns. - `Optional outputTokens` Total output tokens generated across all turns. ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.threads.BetaManagedAgentsSessionThread; import com.anthropic.models.beta.sessions.threads.ThreadRetrieveParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); ThreadRetrieveParams params = ThreadRetrieveParams.builder() .sessionId("sesn_011CZkZAtmR3yMPDzynEDxu7") .threadId("sthr_011CZkZVWa6oIjw0rgXZpnBt") .build(); BetaManagedAgentsSessionThread betaManagedAgentsSessionThread = client.beta().sessions().threads().retrieve(params); } } ``` #### 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 `BetaManagedAgentsSessionThread beta().sessions().threads().archive(ThreadArchiveParamsparams, RequestOptionsrequestOptions = RequestOptions.none())` **post** `/v1/sessions/{session_id}/threads/{thread_id}/archive` Archive Session Thread ### Parameters - `ThreadArchiveParams params` - `String sessionId` - `Optional threadId` - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` ### Returns - `class BetaManagedAgentsSessionThread:` An execution thread within a `session`. Each session has one primary thread plus zero or more child threads spawned by the coordinator. - `String id` Unique identifier for this thread. - `BetaManagedAgentsSessionThreadAgent agent` 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`. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Optional archivedAt` A timestamp in RFC 3339 format - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `Optional parentThreadId` Parent thread that spawned this thread. Null for the primary thread. - `String sessionId` The session this thread belongs to. - `Optional stats` Timing statistics for a session thread. - `Optional activeSeconds` Cumulative time in seconds the thread spent actively running. Excludes idle time. - `Optional durationSeconds` Elapsed time since thread creation in seconds. For archived threads, frozen at the final update. - `Optional startupSeconds` Time in seconds for the thread to begin running. Zero for child threads, which start immediately. - `BetaManagedAgentsSessionThreadStatus status` SessionThreadStatus enum - `RUNNING("running")` - `IDLE("idle")` - `RESCHEDULING("rescheduling")` - `TERMINATED("terminated")` - `Type type` - `SESSION_THREAD("session_thread")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `Optional usage` Cumulative token usage for a session thread across all turns. - `Optional cacheCreation` Prompt-cache creation token usage broken down by cache lifetime. - `Optional ephemeral1hInputTokens` Tokens used to create 1-hour ephemeral cache entries. - `Optional ephemeral5mInputTokens` Tokens used to create 5-minute ephemeral cache entries. - `Optional cacheReadInputTokens` Total tokens read from prompt cache. - `Optional inputTokens` Total input tokens consumed across all turns. - `Optional outputTokens` Total output tokens generated across all turns. ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.threads.BetaManagedAgentsSessionThread; import com.anthropic.models.beta.sessions.threads.ThreadArchiveParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); ThreadArchiveParams params = ThreadArchiveParams.builder() .sessionId("sesn_011CZkZAtmR3yMPDzynEDxu7") .threadId("sthr_011CZkZVWa6oIjw0rgXZpnBt") .build(); BetaManagedAgentsSessionThread betaManagedAgentsSessionThread = client.beta().sessions().threads().archive(params); } } ``` #### 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 - `class BetaManagedAgentsSessionThread:` An execution thread within a `session`. Each session has one primary thread plus zero or more child threads spawned by the coordinator. - `String id` Unique identifier for this thread. - `BetaManagedAgentsSessionThreadAgent agent` 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`. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Optional archivedAt` A timestamp in RFC 3339 format - `LocalDateTime createdAt` A timestamp in RFC 3339 format - `Optional parentThreadId` Parent thread that spawned this thread. Null for the primary thread. - `String sessionId` The session this thread belongs to. - `Optional stats` Timing statistics for a session thread. - `Optional activeSeconds` Cumulative time in seconds the thread spent actively running. Excludes idle time. - `Optional durationSeconds` Elapsed time since thread creation in seconds. For archived threads, frozen at the final update. - `Optional startupSeconds` Time in seconds for the thread to begin running. Zero for child threads, which start immediately. - `BetaManagedAgentsSessionThreadStatus status` SessionThreadStatus enum - `RUNNING("running")` - `IDLE("idle")` - `RESCHEDULING("rescheduling")` - `TERMINATED("terminated")` - `Type type` - `SESSION_THREAD("session_thread")` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format - `Optional usage` Cumulative token usage for a session thread across all turns. - `Optional cacheCreation` Prompt-cache creation token usage broken down by cache lifetime. - `Optional ephemeral1hInputTokens` Tokens used to create 1-hour ephemeral cache entries. - `Optional ephemeral5mInputTokens` Tokens used to create 5-minute ephemeral cache entries. - `Optional cacheReadInputTokens` Total tokens read from prompt cache. - `Optional inputTokens` Total input tokens consumed across all turns. - `Optional outputTokens` Total output tokens generated across all turns. ### Beta Managed Agents Session Thread Stats - `class BetaManagedAgentsSessionThreadStats:` Timing statistics for a session thread. - `Optional activeSeconds` Cumulative time in seconds the thread spent actively running. Excludes idle time. - `Optional durationSeconds` Elapsed time since thread creation in seconds. For archived threads, frozen at the final update. - `Optional startupSeconds` Time in seconds for the thread to begin running. Zero for child threads, which start immediately. ### Beta Managed Agents Session Thread Status - `enum BetaManagedAgentsSessionThreadStatus:` SessionThreadStatus enum - `RUNNING("running")` - `IDLE("idle")` - `RESCHEDULING("rescheduling")` - `TERMINATED("terminated")` ### Beta Managed Agents Session Thread Usage - `class BetaManagedAgentsSessionThreadUsage:` Cumulative token usage for a session thread across all turns. - `Optional cacheCreation` Prompt-cache creation token usage broken down by cache lifetime. - `Optional ephemeral1hInputTokens` Tokens used to create 1-hour ephemeral cache entries. - `Optional ephemeral5mInputTokens` Tokens used to create 5-minute ephemeral cache entries. - `Optional cacheReadInputTokens` Total tokens read from prompt cache. - `Optional inputTokens` Total input tokens consumed across all turns. - `Optional outputTokens` Total output tokens generated across all turns. ### Beta Managed Agents Stream Session Thread Events - `class BetaManagedAgentsStreamSessionThreadEvents: A class that can be one of several variants.union` Server-sent event in a single thread's stream. - `class BetaManagedAgentsUserMessageEvent:` A user message event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of content blocks comprising the user message. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `Type type` - `USER_MESSAGE("user.message")` - `Optional processedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsUserInterruptEvent:` An interrupt event that pauses agent execution and returns control to the user. - `String id` Unique identifier for this event. - `Type type` - `USER_INTERRUPT("user.interrupt")` - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserToolConfirmationEvent:` A tool confirmation event that approves or denies a pending tool execution. - `String id` Unique identifier for this event. - `Result result` UserToolConfirmationResult enum - `ALLOW("allow")` - `DENY("deny")` - `String toolUseId` 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 type` - `USER_TOOL_CONFIRMATION("user.tool_confirmation")` - `Optional denyMessage` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserCustomToolResultEvent:` Event sent by the client providing the result of a custom tool execution. - `String id` Unique identifier for this event. - `String customToolUseId` 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 type` - `USER_CUSTOM_TOOL_RESULT("user.custom_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `class BetaManagedAgentsAgentCustomToolUseEvent:` 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. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the custom tool being called. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_CUSTOM_TOOL_USE("agent.custom_tool_use")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentMessageEvent:` An agent response event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of text blocks comprising the agent response. - `String text` The text content. - `Type type` - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MESSAGE("agent.message")` - `class BetaManagedAgentsAgentThinkingEvent:` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THINKING("agent.thinking")` - `class BetaManagedAgentsAgentMcpToolUseEvent:` Event emitted when the agent invokes a tool provided by an MCP server. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String mcpServerName` Name of the MCP server providing the tool. - `String name` Name of the MCP tool being used. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MCP_TOOL_USE("agent.mcp_tool_use")` - `Optional evaluatedPermission` AgentEvaluatedPermission enum - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentMcpToolResultEvent:` Event representing the result of an MCP tool execution. - `String id` Unique identifier for this event. - `String mcpToolUseId` The id of the `agent.mcp_tool_use` event this result corresponds to. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MCP_TOOL_RESULT("agent.mcp_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsAgentToolUseEvent:` Event emitted when the agent invokes a built-in agent tool. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the agent tool being used. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_TOOL_USE("agent.tool_use")` - `Optional evaluatedPermission` AgentEvaluatedPermission enum - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentToolResultEvent:` Event representing the result of an agent tool execution. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String toolUseId` The id of the `agent.tool_use` event this result corresponds to. - `Type type` - `AGENT_TOOL_RESULT("agent.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsAgentThreadMessageReceivedEvent:` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `String fromSessionThreadId` Public `sthr_` ID of the thread that sent the message. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THREAD_MESSAGE_RECEIVED("agent.thread_message_received")` - `Optional fromAgentName` Name of the callable agent this message came from. Absent when received from the primary agent. - `class BetaManagedAgentsAgentThreadMessageSentEvent:` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String toSessionThreadId` Public `sthr_` ID of the thread the message was sent to. - `Type type` - `AGENT_THREAD_MESSAGE_SENT("agent.thread_message_sent")` - `Optional toAgentName` Name of the callable agent this message was sent to. Absent when sent to the primary agent. - `class BetaManagedAgentsAgentThreadContextCompactedEvent:` Indicates that context compaction (summarization) occurred during the session. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THREAD_CONTEXT_COMPACTED("agent.thread_context_compacted")` - `class BetaManagedAgentsSessionErrorEvent:` An error event indicating a problem occurred during session execution. - `String id` Unique identifier for this event. - `Error error` 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. - `class BetaManagedAgentsUnknownError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` - `Type type` - `UNKNOWN_ERROR("unknown_error")` - `class BetaManagedAgentsModelOverloadedError:` The model is currently overloaded. Emitted after automatic retries are exhausted. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_OVERLOADED_ERROR("model_overloaded_error")` - `class BetaManagedAgentsModelRateLimitedError:` The model request was rate-limited. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_RATE_LIMITED_ERROR("model_rate_limited_error")` - `class BetaManagedAgentsModelRequestFailedError:` A model request failed for a reason other than overload or rate-limiting. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_REQUEST_FAILED_ERROR("model_request_failed_error")` - `class BetaManagedAgentsMcpConnectionFailedError:` Failed to connect to an MCP server. - `String mcpServerName` Name of the MCP server that failed to connect. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MCP_CONNECTION_FAILED_ERROR("mcp_connection_failed_error")` - `class BetaManagedAgentsMcpAuthenticationFailedError:` Authentication to an MCP server failed. - `String mcpServerName` Name of the MCP server that failed authentication. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MCP_AUTHENTICATION_FAILED_ERROR("mcp_authentication_failed_error")` - `class BetaManagedAgentsBillingError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `BILLING_ERROR("billing_error")` - `class BetaManagedAgentsCredentialHostUnreachableError:` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `String credentialId` ID of the affected credential. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `CREDENTIAL_HOST_UNREACHABLE_ERROR("credential_host_unreachable_error")` - `String vaultId` ID of the vault containing the affected credential. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_ERROR("session.error")` - `class BetaManagedAgentsSessionStatusRescheduledEvent:` Indicates the session is recovering from an error state and is rescheduled for execution. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_RESCHEDULED("session.status_rescheduled")` - `class BetaManagedAgentsSessionStatusRunningEvent:` Indicates the session is actively running and the agent is working. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_RUNNING("session.status_running")` - `class BetaManagedAgentsSessionStatusIdleEvent:` Indicates the agent has paused and is awaiting user input. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `StopReason stopReason` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `Type type` - `END_TURN("end_turn")` - `class BetaManagedAgentsSessionRequiresAction:` 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. - `List eventIds` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type type` - `REQUIRES_ACTION("requires_action")` - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `RETRIES_EXHAUSTED("retries_exhausted")` - `Type type` - `SESSION_STATUS_IDLE("session.status_idle")` - `class BetaManagedAgentsSessionStatusTerminatedEvent:` Indicates the session has terminated, either due to an error or completion. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_TERMINATED("session.status_terminated")` - `class BetaManagedAgentsSessionThreadCreatedEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the callable agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public `sthr_` ID of the newly created thread. - `Type type` - `SESSION_THREAD_CREATED("session.thread_created")` - `class BetaManagedAgentsSpanOutcomeEvaluationStartEvent:` Emitted when an outcome evaluation cycle begins. - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_OUTCOME_EVALUATION_START("span.outcome_evaluation_start")` - `class BetaManagedAgentsSpanOutcomeEvaluationEndEvent:` 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. - `String id` Unique identifier for this event. - `String explanation` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `String outcomeEvaluationStartId` The id of the corresponding `span.outcome_evaluation_start` event. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String result` 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 type` - `SPAN_OUTCOME_EVALUATION_END("span.outcome_evaluation_end")` - `BetaManagedAgentsSpanModelUsage usage` Token usage for a single model request. - `long cacheCreationInputTokens` Tokens used to create prompt cache in this request. - `long cacheReadInputTokens` Tokens read from prompt cache in this request. - `long inputTokens` Input tokens consumed by this request. - `long outputTokens` Output tokens generated by this request. - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `class BetaManagedAgentsSpanModelRequestStartEvent:` Emitted when a model request is initiated by the agent. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_MODEL_REQUEST_START("span.model_request_start")` - `class BetaManagedAgentsSpanModelRequestEndEvent:` Emitted when a model request completes. - `String id` Unique identifier for this event. - `Optional isError` Whether the model request resulted in an error. - `String modelRequestStartId` The id of the corresponding `span.model_request_start` event. - `BetaManagedAgentsSpanModelUsage modelUsage` Token usage for a single model request. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_MODEL_REQUEST_END("span.model_request_end")` - `class BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent:` 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. - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_OUTCOME_EVALUATION_ONGOING("span.outcome_evaluation_ongoing")` - `class BetaManagedAgentsUserDefineOutcomeEvent:` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `String id` Unique identifier for this event. - `String description` What the agent should produce. Copied from the input event. - `Optional maxIterations` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `String outcomeId` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Rubric rubric` Rubric for grading the quality of an outcome. - `class BetaManagedAgentsFileRubric:` Rubric referenced by a file uploaded via the Files API. - `String fileId` ID of the rubric file. - `Type type` - `FILE("file")` - `class BetaManagedAgentsTextRubric:` Rubric content provided inline as text. - `String content` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type type` - `TEXT("text")` - `Type type` - `USER_DEFINE_OUTCOME("user.define_outcome")` - `class BetaManagedAgentsSessionDeletedEvent:` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_DELETED("session.deleted")` - `class BetaManagedAgentsSessionThreadStatusRunningEvent:` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that started running. - `Type type` - `SESSION_THREAD_STATUS_RUNNING("session.thread_status_running")` - `class BetaManagedAgentsSessionThreadStatusIdleEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that went idle. - `StopReason stopReason` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionRequiresAction:` 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. - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `SESSION_THREAD_STATUS_IDLE("session.thread_status_idle")` - `class BetaManagedAgentsSessionThreadStatusTerminatedEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that terminated. - `Type type` - `SESSION_THREAD_STATUS_TERMINATED("session.thread_status_terminated")` - `class BetaManagedAgentsUserToolResultEvent:` 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. - `String id` Unique identifier for this event. - `String toolUseId` 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 type` - `USER_TOOL_RESULT("user.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `class BetaManagedAgentsSessionThreadStatusRescheduledEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that is retrying. - `Type type` - `SESSION_THREAD_STATUS_RESCHEDULED("session.thread_status_rescheduled")` - `class BetaManagedAgentsSessionUpdatedEvent:` 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. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_UPDATED("session.updated")` - `Optional agent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `Optional multiagent` Resolved coordinator topology with full agent definitions for each roster member. - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `class BetaManagedAgentsMcpToolset:` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `Type type` - `AGENT("agent")` - `long version` - `Optional metadata` 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. - `Optional title` The session's new title. Present only when the update changed it. - `class BetaManagedAgentsSystemMessageEvent:` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `String id` Unique identifier for this event. - `List content` System content blocks. Text-only. - `String text` The text content. - `Type type` - `TEXT("text")` - `Type type` - `SYSTEM_MESSAGE("system.message")` - `Optional processedAt` A timestamp in RFC 3339 format # Events ## List Session Thread Events `EventListPage beta().sessions().threads().events().list(EventListParamsparams, RequestOptionsrequestOptions = RequestOptions.none())` **get** `/v1/sessions/{session_id}/threads/{thread_id}/events` List Session Thread Events ### Parameters - `EventListParams params` - `String sessionId` - `Optional threadId` - `Optional limit` Query parameter for limit - `Optional page` Query parameter for page - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` ### Returns - `class BetaManagedAgentsSessionEvent: A class that can be one of several variants.union` Union type for all event types in a session. - `class BetaManagedAgentsUserMessageEvent:` A user message event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of content blocks comprising the user message. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `Type type` - `USER_MESSAGE("user.message")` - `Optional processedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsUserInterruptEvent:` An interrupt event that pauses agent execution and returns control to the user. - `String id` Unique identifier for this event. - `Type type` - `USER_INTERRUPT("user.interrupt")` - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserToolConfirmationEvent:` A tool confirmation event that approves or denies a pending tool execution. - `String id` Unique identifier for this event. - `Result result` UserToolConfirmationResult enum - `ALLOW("allow")` - `DENY("deny")` - `String toolUseId` 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 type` - `USER_TOOL_CONFIRMATION("user.tool_confirmation")` - `Optional denyMessage` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserCustomToolResultEvent:` Event sent by the client providing the result of a custom tool execution. - `String id` Unique identifier for this event. - `String customToolUseId` 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 type` - `USER_CUSTOM_TOOL_RESULT("user.custom_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `class BetaManagedAgentsAgentCustomToolUseEvent:` 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. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the custom tool being called. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_CUSTOM_TOOL_USE("agent.custom_tool_use")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentMessageEvent:` An agent response event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of text blocks comprising the agent response. - `String text` The text content. - `Type type` - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MESSAGE("agent.message")` - `class BetaManagedAgentsAgentThinkingEvent:` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THINKING("agent.thinking")` - `class BetaManagedAgentsAgentMcpToolUseEvent:` Event emitted when the agent invokes a tool provided by an MCP server. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String mcpServerName` Name of the MCP server providing the tool. - `String name` Name of the MCP tool being used. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MCP_TOOL_USE("agent.mcp_tool_use")` - `Optional evaluatedPermission` AgentEvaluatedPermission enum - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentMcpToolResultEvent:` Event representing the result of an MCP tool execution. - `String id` Unique identifier for this event. - `String mcpToolUseId` The id of the `agent.mcp_tool_use` event this result corresponds to. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MCP_TOOL_RESULT("agent.mcp_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsAgentToolUseEvent:` Event emitted when the agent invokes a built-in agent tool. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the agent tool being used. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_TOOL_USE("agent.tool_use")` - `Optional evaluatedPermission` AgentEvaluatedPermission enum - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentToolResultEvent:` Event representing the result of an agent tool execution. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String toolUseId` The id of the `agent.tool_use` event this result corresponds to. - `Type type` - `AGENT_TOOL_RESULT("agent.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsAgentThreadMessageReceivedEvent:` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `String fromSessionThreadId` Public `sthr_` ID of the thread that sent the message. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THREAD_MESSAGE_RECEIVED("agent.thread_message_received")` - `Optional fromAgentName` Name of the callable agent this message came from. Absent when received from the primary agent. - `class BetaManagedAgentsAgentThreadMessageSentEvent:` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String toSessionThreadId` Public `sthr_` ID of the thread the message was sent to. - `Type type` - `AGENT_THREAD_MESSAGE_SENT("agent.thread_message_sent")` - `Optional toAgentName` Name of the callable agent this message was sent to. Absent when sent to the primary agent. - `class BetaManagedAgentsAgentThreadContextCompactedEvent:` Indicates that context compaction (summarization) occurred during the session. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THREAD_CONTEXT_COMPACTED("agent.thread_context_compacted")` - `class BetaManagedAgentsSessionErrorEvent:` An error event indicating a problem occurred during session execution. - `String id` Unique identifier for this event. - `Error error` 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. - `class BetaManagedAgentsUnknownError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` - `Type type` - `UNKNOWN_ERROR("unknown_error")` - `class BetaManagedAgentsModelOverloadedError:` The model is currently overloaded. Emitted after automatic retries are exhausted. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_OVERLOADED_ERROR("model_overloaded_error")` - `class BetaManagedAgentsModelRateLimitedError:` The model request was rate-limited. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_RATE_LIMITED_ERROR("model_rate_limited_error")` - `class BetaManagedAgentsModelRequestFailedError:` A model request failed for a reason other than overload or rate-limiting. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_REQUEST_FAILED_ERROR("model_request_failed_error")` - `class BetaManagedAgentsMcpConnectionFailedError:` Failed to connect to an MCP server. - `String mcpServerName` Name of the MCP server that failed to connect. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MCP_CONNECTION_FAILED_ERROR("mcp_connection_failed_error")` - `class BetaManagedAgentsMcpAuthenticationFailedError:` Authentication to an MCP server failed. - `String mcpServerName` Name of the MCP server that failed authentication. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MCP_AUTHENTICATION_FAILED_ERROR("mcp_authentication_failed_error")` - `class BetaManagedAgentsBillingError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `BILLING_ERROR("billing_error")` - `class BetaManagedAgentsCredentialHostUnreachableError:` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `String credentialId` ID of the affected credential. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `CREDENTIAL_HOST_UNREACHABLE_ERROR("credential_host_unreachable_error")` - `String vaultId` ID of the vault containing the affected credential. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_ERROR("session.error")` - `class BetaManagedAgentsSessionStatusRescheduledEvent:` Indicates the session is recovering from an error state and is rescheduled for execution. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_RESCHEDULED("session.status_rescheduled")` - `class BetaManagedAgentsSessionStatusRunningEvent:` Indicates the session is actively running and the agent is working. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_RUNNING("session.status_running")` - `class BetaManagedAgentsSessionStatusIdleEvent:` Indicates the agent has paused and is awaiting user input. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `StopReason stopReason` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `Type type` - `END_TURN("end_turn")` - `class BetaManagedAgentsSessionRequiresAction:` 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. - `List eventIds` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type type` - `REQUIRES_ACTION("requires_action")` - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `RETRIES_EXHAUSTED("retries_exhausted")` - `Type type` - `SESSION_STATUS_IDLE("session.status_idle")` - `class BetaManagedAgentsSessionStatusTerminatedEvent:` Indicates the session has terminated, either due to an error or completion. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_TERMINATED("session.status_terminated")` - `class BetaManagedAgentsSessionThreadCreatedEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the callable agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public `sthr_` ID of the newly created thread. - `Type type` - `SESSION_THREAD_CREATED("session.thread_created")` - `class BetaManagedAgentsSpanOutcomeEvaluationStartEvent:` Emitted when an outcome evaluation cycle begins. - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_OUTCOME_EVALUATION_START("span.outcome_evaluation_start")` - `class BetaManagedAgentsSpanOutcomeEvaluationEndEvent:` 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. - `String id` Unique identifier for this event. - `String explanation` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `String outcomeEvaluationStartId` The id of the corresponding `span.outcome_evaluation_start` event. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String result` 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 type` - `SPAN_OUTCOME_EVALUATION_END("span.outcome_evaluation_end")` - `BetaManagedAgentsSpanModelUsage usage` Token usage for a single model request. - `long cacheCreationInputTokens` Tokens used to create prompt cache in this request. - `long cacheReadInputTokens` Tokens read from prompt cache in this request. - `long inputTokens` Input tokens consumed by this request. - `long outputTokens` Output tokens generated by this request. - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `class BetaManagedAgentsSpanModelRequestStartEvent:` Emitted when a model request is initiated by the agent. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_MODEL_REQUEST_START("span.model_request_start")` - `class BetaManagedAgentsSpanModelRequestEndEvent:` Emitted when a model request completes. - `String id` Unique identifier for this event. - `Optional isError` Whether the model request resulted in an error. - `String modelRequestStartId` The id of the corresponding `span.model_request_start` event. - `BetaManagedAgentsSpanModelUsage modelUsage` Token usage for a single model request. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_MODEL_REQUEST_END("span.model_request_end")` - `class BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent:` 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. - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_OUTCOME_EVALUATION_ONGOING("span.outcome_evaluation_ongoing")` - `class BetaManagedAgentsUserDefineOutcomeEvent:` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `String id` Unique identifier for this event. - `String description` What the agent should produce. Copied from the input event. - `Optional maxIterations` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `String outcomeId` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Rubric rubric` Rubric for grading the quality of an outcome. - `class BetaManagedAgentsFileRubric:` Rubric referenced by a file uploaded via the Files API. - `String fileId` ID of the rubric file. - `Type type` - `FILE("file")` - `class BetaManagedAgentsTextRubric:` Rubric content provided inline as text. - `String content` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type type` - `TEXT("text")` - `Type type` - `USER_DEFINE_OUTCOME("user.define_outcome")` - `class BetaManagedAgentsSessionDeletedEvent:` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_DELETED("session.deleted")` - `class BetaManagedAgentsSessionThreadStatusRunningEvent:` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that started running. - `Type type` - `SESSION_THREAD_STATUS_RUNNING("session.thread_status_running")` - `class BetaManagedAgentsSessionThreadStatusIdleEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that went idle. - `StopReason stopReason` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionRequiresAction:` 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. - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `SESSION_THREAD_STATUS_IDLE("session.thread_status_idle")` - `class BetaManagedAgentsSessionThreadStatusTerminatedEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that terminated. - `Type type` - `SESSION_THREAD_STATUS_TERMINATED("session.thread_status_terminated")` - `class BetaManagedAgentsUserToolResultEvent:` 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. - `String id` Unique identifier for this event. - `String toolUseId` 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 type` - `USER_TOOL_RESULT("user.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `class BetaManagedAgentsSessionThreadStatusRescheduledEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that is retrying. - `Type type` - `SESSION_THREAD_STATUS_RESCHEDULED("session.thread_status_rescheduled")` - `class BetaManagedAgentsSessionUpdatedEvent:` 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. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_UPDATED("session.updated")` - `Optional agent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `Optional multiagent` Resolved coordinator topology with full agent definitions for each roster member. - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `class BetaManagedAgentsMcpToolset:` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `Type type` - `AGENT("agent")` - `long version` - `Optional metadata` 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. - `Optional title` The session's new title. Present only when the update changed it. - `class BetaManagedAgentsSystemMessageEvent:` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `String id` Unique identifier for this event. - `List content` System content blocks. Text-only. - `String text` The text content. - `Type type` - `TEXT("text")` - `Type type` - `SYSTEM_MESSAGE("system.message")` - `Optional processedAt` A timestamp in RFC 3339 format ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.threads.events.EventListPage; import com.anthropic.models.beta.sessions.threads.events.EventListParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); EventListParams params = EventListParams.builder() .sessionId("sesn_011CZkZAtmR3yMPDzynEDxu7") .threadId("sthr_011CZkZVWa6oIjw0rgXZpnBt") .build(); EventListPage page = client.beta().sessions().threads().events().list(params); } } ``` #### 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 `BetaManagedAgentsStreamSessionThreadEvents beta().sessions().threads().events().streamStreaming(EventStreamParamsparams, RequestOptionsrequestOptions = RequestOptions.none())` **get** `/v1/sessions/{session_id}/threads/{thread_id}/stream` Stream Session Thread Events ### Parameters - `EventStreamParams params` - `String sessionId` - `Optional threadId` - `Optional> betas` Optional header to specify the beta version(s) you want to use. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` ### Returns - `class BetaManagedAgentsStreamSessionThreadEvents: A class that can be one of several variants.union` Server-sent event in a single thread's stream. - `class BetaManagedAgentsUserMessageEvent:` A user message event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of content blocks comprising the user message. - `class BetaManagedAgentsTextBlock:` Regular text content. - `String text` The text content. - `Type type` - `TEXT("text")` - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `Source source` Union type for image source variants. - `class BetaManagedAgentsBase64ImageSource:` Base64-encoded image data. - `String data` Base64-encoded image data. - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsUrlImageSource:` Image referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the image to fetch. - `class BetaManagedAgentsFileImageSource:` Image referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `IMAGE("image")` - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Source source` Union type for document source variants. - `class BetaManagedAgentsBase64DocumentSource:` Base64-encoded document data. - `String data` Base64-encoded document data. - `String mediaType` MIME type of the document (e.g., "application/pdf"). - `Type type` - `BASE64("base64")` - `class BetaManagedAgentsPlainTextDocumentSource:` Plain text document content. - `String data` The plain text content. - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `TEXT_PLAIN("text/plain")` - `Type type` - `TEXT("text")` - `class BetaManagedAgentsUrlDocumentSource:` Document referenced by URL. - `Type type` - `URL("url")` - `String url` URL of the document to fetch. - `class BetaManagedAgentsFileDocumentSource:` Document referenced by file ID. - `String fileId` ID of a previously uploaded file. - `Type type` - `FILE("file")` - `Type type` - `DOCUMENT("document")` - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `Type type` - `USER_MESSAGE("user.message")` - `Optional processedAt` A timestamp in RFC 3339 format - `class BetaManagedAgentsUserInterruptEvent:` An interrupt event that pauses agent execution and returns control to the user. - `String id` Unique identifier for this event. - `Type type` - `USER_INTERRUPT("user.interrupt")` - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserToolConfirmationEvent:` A tool confirmation event that approves or denies a pending tool execution. - `String id` Unique identifier for this event. - `Result result` UserToolConfirmationResult enum - `ALLOW("allow")` - `DENY("deny")` - `String toolUseId` 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 type` - `USER_TOOL_CONFIRMATION("user.tool_confirmation")` - `Optional denyMessage` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` 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. - `class BetaManagedAgentsUserCustomToolResultEvent:` Event sent by the client providing the result of a custom tool execution. - `String id` Unique identifier for this event. - `String customToolUseId` 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 type` - `USER_CUSTOM_TOOL_RESULT("user.custom_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `BetaManagedAgentsSearchResultCitations citations` Citation settings for a search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `String text` The text content. - `Type type` - `TEXT("text")` - `String source` The URL source of the search result. - `String title` The title of the search result. - `Type type` - `SEARCH_RESULT("search_result")` - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.custom_tool_use` event's `session_thread_id`. - `class BetaManagedAgentsAgentCustomToolUseEvent:` 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. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the custom tool being called. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_CUSTOM_TOOL_USE("agent.custom_tool_use")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentMessageEvent:` An agent response event in the session conversation. - `String id` Unique identifier for this event. - `List content` Array of text blocks comprising the agent response. - `String text` The text content. - `Type type` - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MESSAGE("agent.message")` - `class BetaManagedAgentsAgentThinkingEvent:` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THINKING("agent.thinking")` - `class BetaManagedAgentsAgentMcpToolUseEvent:` Event emitted when the agent invokes a tool provided by an MCP server. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String mcpServerName` Name of the MCP server providing the tool. - `String name` Name of the MCP tool being used. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MCP_TOOL_USE("agent.mcp_tool_use")` - `Optional evaluatedPermission` AgentEvaluatedPermission enum - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentMcpToolResultEvent:` Event representing the result of an MCP tool execution. - `String id` Unique identifier for this event. - `String mcpToolUseId` The id of the `agent.mcp_tool_use` event this result corresponds to. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_MCP_TOOL_RESULT("agent.mcp_tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsAgentToolUseEvent:` Event emitted when the agent invokes a built-in agent tool. - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the agent tool being used. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_TOOL_USE("agent.tool_use")` - `Optional evaluatedPermission` AgentEvaluatedPermission enum - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional sessionThreadId` 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. - `class BetaManagedAgentsAgentToolResultEvent:` Event representing the result of an agent tool execution. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String toolUseId` The id of the `agent.tool_use` event this result corresponds to. - `Type type` - `AGENT_TOOL_RESULT("agent.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsAgentThreadMessageReceivedEvent:` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `String fromSessionThreadId` Public `sthr_` ID of the thread that sent the message. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THREAD_MESSAGE_RECEIVED("agent.thread_message_received")` - `Optional fromAgentName` Name of the callable agent this message came from. Absent when received from the primary agent. - `class BetaManagedAgentsAgentThreadMessageSentEvent:` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String toSessionThreadId` Public `sthr_` ID of the thread the message was sent to. - `Type type` - `AGENT_THREAD_MESSAGE_SENT("agent.thread_message_sent")` - `Optional toAgentName` Name of the callable agent this message was sent to. Absent when sent to the primary agent. - `class BetaManagedAgentsAgentThreadContextCompactedEvent:` Indicates that context compaction (summarization) occurred during the session. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `AGENT_THREAD_CONTEXT_COMPACTED("agent.thread_context_compacted")` - `class BetaManagedAgentsSessionErrorEvent:` An error event indicating a problem occurred during session execution. - `String id` Unique identifier for this event. - `Error error` 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. - `class BetaManagedAgentsUnknownError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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 type` - `RETRYING("retrying")` - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `EXHAUSTED("exhausted")` - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `TERMINAL("terminal")` - `Type type` - `UNKNOWN_ERROR("unknown_error")` - `class BetaManagedAgentsModelOverloadedError:` The model is currently overloaded. Emitted after automatic retries are exhausted. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_OVERLOADED_ERROR("model_overloaded_error")` - `class BetaManagedAgentsModelRateLimitedError:` The model request was rate-limited. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_RATE_LIMITED_ERROR("model_rate_limited_error")` - `class BetaManagedAgentsModelRequestFailedError:` A model request failed for a reason other than overload or rate-limiting. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MODEL_REQUEST_FAILED_ERROR("model_request_failed_error")` - `class BetaManagedAgentsMcpConnectionFailedError:` Failed to connect to an MCP server. - `String mcpServerName` Name of the MCP server that failed to connect. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MCP_CONNECTION_FAILED_ERROR("mcp_connection_failed_error")` - `class BetaManagedAgentsMcpAuthenticationFailedError:` Authentication to an MCP server failed. - `String mcpServerName` Name of the MCP server that failed authentication. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `MCP_AUTHENTICATION_FAILED_ERROR("mcp_authentication_failed_error")` - `class BetaManagedAgentsBillingError:` 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. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `BILLING_ERROR("billing_error")` - `class BetaManagedAgentsCredentialHostUnreachableError:` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `String credentialId` ID of the affected credential. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next in response to this error. - `class BetaManagedAgentsRetryStatusRetrying:` 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. - `class BetaManagedAgentsRetryStatusExhausted:` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal:` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `CREDENTIAL_HOST_UNREACHABLE_ERROR("credential_host_unreachable_error")` - `String vaultId` ID of the vault containing the affected credential. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_ERROR("session.error")` - `class BetaManagedAgentsSessionStatusRescheduledEvent:` Indicates the session is recovering from an error state and is rescheduled for execution. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_RESCHEDULED("session.status_rescheduled")` - `class BetaManagedAgentsSessionStatusRunningEvent:` Indicates the session is actively running and the agent is working. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_RUNNING("session.status_running")` - `class BetaManagedAgentsSessionStatusIdleEvent:` Indicates the agent has paused and is awaiting user input. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `StopReason stopReason` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `Type type` - `END_TURN("end_turn")` - `class BetaManagedAgentsSessionRequiresAction:` 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. - `List eventIds` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `Type type` - `REQUIRES_ACTION("requires_action")` - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `RETRIES_EXHAUSTED("retries_exhausted")` - `Type type` - `SESSION_STATUS_IDLE("session.status_idle")` - `class BetaManagedAgentsSessionStatusTerminatedEvent:` Indicates the session has terminated, either due to an error or completion. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_STATUS_TERMINATED("session.status_terminated")` - `class BetaManagedAgentsSessionThreadCreatedEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the callable agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public `sthr_` ID of the newly created thread. - `Type type` - `SESSION_THREAD_CREATED("session.thread_created")` - `class BetaManagedAgentsSpanOutcomeEvaluationStartEvent:` Emitted when an outcome evaluation cycle begins. - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_OUTCOME_EVALUATION_START("span.outcome_evaluation_start")` - `class BetaManagedAgentsSpanOutcomeEvaluationEndEvent:` 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. - `String id` Unique identifier for this event. - `String explanation` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `String outcomeEvaluationStartId` The id of the corresponding `span.outcome_evaluation_start` event. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String result` 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 type` - `SPAN_OUTCOME_EVALUATION_END("span.outcome_evaluation_end")` - `BetaManagedAgentsSpanModelUsage usage` Token usage for a single model request. - `long cacheCreationInputTokens` Tokens used to create prompt cache in this request. - `long cacheReadInputTokens` Tokens read from prompt cache in this request. - `long inputTokens` Input tokens consumed by this request. - `long outputTokens` Output tokens generated by this request. - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `class BetaManagedAgentsSpanModelRequestStartEvent:` Emitted when a model request is initiated by the agent. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_MODEL_REQUEST_START("span.model_request_start")` - `class BetaManagedAgentsSpanModelRequestEndEvent:` Emitted when a model request completes. - `String id` Unique identifier for this event. - `Optional isError` Whether the model request resulted in an error. - `String modelRequestStartId` The id of the corresponding `span.model_request_start` event. - `BetaManagedAgentsSpanModelUsage modelUsage` Token usage for a single model request. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_MODEL_REQUEST_END("span.model_request_end")` - `class BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent:` 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. - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SPAN_OUTCOME_EVALUATION_ONGOING("span.outcome_evaluation_ongoing")` - `class BetaManagedAgentsUserDefineOutcomeEvent:` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `String id` Unique identifier for this event. - `String description` What the agent should produce. Copied from the input event. - `Optional maxIterations` Evaluate-then-revise cycles before giving up. Default 3, max 20. - `String outcomeId` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Rubric rubric` Rubric for grading the quality of an outcome. - `class BetaManagedAgentsFileRubric:` Rubric referenced by a file uploaded via the Files API. - `String fileId` ID of the rubric file. - `Type type` - `FILE("file")` - `class BetaManagedAgentsTextRubric:` Rubric content provided inline as text. - `String content` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `Type type` - `TEXT("text")` - `Type type` - `USER_DEFINE_OUTCOME("user.define_outcome")` - `class BetaManagedAgentsSessionDeletedEvent:` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_DELETED("session.deleted")` - `class BetaManagedAgentsSessionThreadStatusRunningEvent:` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that started running. - `Type type` - `SESSION_THREAD_STATUS_RUNNING("session.thread_status_running")` - `class BetaManagedAgentsSessionThreadStatusIdleEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that went idle. - `StopReason stopReason` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionEndTurn:` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionRequiresAction:` 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. - `class BetaManagedAgentsSessionRetriesExhausted:` The turn ended because the retry budget was exhausted (`max_iterations` hit or an error escalated to `retry_status: 'exhausted'`). - `Type type` - `SESSION_THREAD_STATUS_IDLE("session.thread_status_idle")` - `class BetaManagedAgentsSessionThreadStatusTerminatedEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that terminated. - `Type type` - `SESSION_THREAD_STATUS_TERMINATED("session.thread_status_terminated")` - `class BetaManagedAgentsUserToolResultEvent:` 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. - `String id` Unique identifier for this event. - `String toolUseId` 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 type` - `USER_TOOL_RESULT("user.tool_result")` - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock:` Regular text content. - `class BetaManagedAgentsImageBlock:` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock:` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock:` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` A timestamp in RFC 3339 format - `Optional sessionThreadId` Routes this result to a subagent thread. Copy from the `agent.tool_use` event's `session_thread_id`. - `class BetaManagedAgentsSessionThreadStatusRescheduledEvent:` 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. - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `String sessionThreadId` Public sthr_ ID of the thread that is retrying. - `Type type` - `SESSION_THREAD_STATUS_RESCHEDULED("session.thread_status_rescheduled")` - `class BetaManagedAgentsSessionUpdatedEvent:` 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. - `String id` Unique identifier for this event. - `LocalDateTime processedAt` A timestamp in RFC 3339 format - `Type type` - `SESSION_UPDATED("session.updated")` - `Optional agent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `URL("url")` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Frontier intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Most intelligent model for building agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` Fastest model with near-frontier intelligence - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` Fastest model with near-frontier intelligence - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Premium model combining maximum intelligence with practical performance - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Premium model combining maximum intelligence with practical performance - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` High-performance model for agents and coding - `Optional speed` 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. - `STANDARD("standard")` - `FAST("fast")` - `Optional multiagent` Resolved coordinator topology with full agent definitions for each roster member. - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `String id` - `Optional description` - `List mcpServers` - `String name` - `Type type` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `String skillId` - `Type type` - `ANTHROPIC("anthropic")` - `String version` - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `String skillId` - `Type type` - `CUSTOM("custom")` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `List configs` - `boolean enabled` - `Name name` Built-in agent tool identifier. - `BASH("bash")` - `EDIT("edit")` - `READ("read")` - `WRITE("write")` - `GLOB("glob")` - `GREP("grep")` - `WEB_FETCH("web_fetch")` - `WEB_SEARCH("web_search")` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `Type type` - `ALWAYS_ALLOW("always_allow")` - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `ALWAYS_ASK("always_ask")` - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `Type type` - `AGENT_TOOLSET_20260401("agent_toolset_20260401")` - `class BetaManagedAgentsMcpToolset:` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy:` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy:` Tool calls require user confirmation before execution. - `String mcpServerName` - `Type type` - `MCP_TOOLSET("mcp_toolset")` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue; type "object"constant` - `OBJECT("object")` - `Optional properties` - `Optional> required` - `String name` - `Type type` - `CUSTOM("custom")` - `Type type` - `AGENT("agent")` - `long version` - `Type type` - `COORDINATOR("coordinator")` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill:` A resolved Anthropic-managed skill. - `class BetaManagedAgentsCustomSkill:` A resolved user-created custom skill. - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401:` - `class BetaManagedAgentsMcpToolset:` - `class BetaManagedAgentsCustomTool:` A custom tool as returned in API responses. - `Type type` - `AGENT("agent")` - `long version` - `Optional metadata` 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. - `Optional title` The session's new title. Present only when the update changed it. - `class BetaManagedAgentsSystemMessageEvent:` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `String id` Unique identifier for this event. - `List content` System content blocks. Text-only. - `String text` The text content. - `Type type` - `TEXT("text")` - `Type type` - `SYSTEM_MESSAGE("system.message")` - `Optional processedAt` A timestamp in RFC 3339 format ### Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.core.http.StreamResponse; import com.anthropic.models.beta.sessions.threads.BetaManagedAgentsStreamSessionThreadEvents; import com.anthropic.models.beta.sessions.threads.events.EventStreamParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); EventStreamParams params = EventStreamParams.builder() .sessionId("sesn_011CZkZAtmR3yMPDzynEDxu7") .threadId("sthr_011CZkZVWa6oIjw0rgXZpnBt") .build(); StreamResponse betaManagedAgentsStreamSessionThreadEvents = client.beta().sessions().threads().events().streamStreaming(params); } } ``` #### Response ```json { "id": "sevt_011CZkZGOp0iBcp4kaQSihUmy", "content": [ { "text": "Where is my order #1234?", "type": "text" } ], "type": "user.message", "processed_at": "2026-03-15T10:00:00Z" } ```