## Acknowledge Work

`client.Beta.Environments.Work.Ack(ctx, workID, params) (*BetaSelfHostedWork, error)`

**post** `/v1/environments/{environment_id}/work/{work_id}/ack`

Note: these endpoints are called automatically by the pre-built environment worker provided in the SDKs and CLI, for orchestrating sessions with self-hosted sandbox environments. They are included here as a reference; you do not need to invoke them directly.

Acknowledge receipt of a work item, transitioning it from 'queued' to 'starting' and removing it from the queue.

### Parameters

- `workID string`

- `params BetaEnvironmentWorkAckParams`

  - `EnvironmentID param.Field[string]`

    Path param

  - `Betas param.Field[[]AnthropicBeta]`

    Header param: Optional header to specify the beta version(s) you want to use.

    - `string`

    - `type AnthropicBeta string`

      - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"`

      - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"`

      - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"`

      - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"`

      - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"`

      - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"`

      - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"`

      - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"`

      - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"`

      - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"`

      - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"`

      - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"`

      - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"`

      - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"`

      - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"`

      - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"`

      - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"`

      - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"`

      - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"`

      - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"`

      - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"`

      - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"`

      - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"`

      - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"`

      - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"`

      - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"`

### Returns

- `type BetaSelfHostedWork struct{…}`

  Work resource representing a unit of work in a self-hosted environment.

  Work items are queued when sessions are created or when long-dormant sessions
  receive new messages. The environment worker polls for work to execute in a
  self-hosted sandbox.

  - `ID string`

    Work identifier (e.g., 'work_...')

  - `AcknowledgedAt string`

    RFC 3339 timestamp when the work item was acknowledged and assigned to a self-hosted sandbox

  - `CreatedAt string`

    RFC 3339 timestamp when work was created

  - `Data BetaSessionWorkData`

    The actual work to be performed

    - `ID string`

      Session identifier (e.g., 'session_...')

    - `Type Session`

      Type of work data

      - `const SessionSession Session = "session"`

  - `EnvironmentID string`

    Environment identifier this work belongs to (e.g., `env_...`)

  - `LatestHeartbeatAt string`

    RFC 3339 timestamp of the most recent heartbeat

  - `Metadata map[string, string]`

    User-provided metadata key-value pairs associated with this work item

  - `StartedAt string`

    RFC 3339 timestamp when work execution started

  - `State BetaSelfHostedWorkState`

    Current state of the work item

    - `const BetaSelfHostedWorkStateQueued BetaSelfHostedWorkState = "queued"`

    - `const BetaSelfHostedWorkStateStarting BetaSelfHostedWorkState = "starting"`

    - `const BetaSelfHostedWorkStateActive BetaSelfHostedWorkState = "active"`

    - `const BetaSelfHostedWorkStateStopping BetaSelfHostedWorkState = "stopping"`

    - `const BetaSelfHostedWorkStateStopped BetaSelfHostedWorkState = "stopped"`

  - `StopRequestedAt string`

    RFC 3339 timestamp when stop was requested

  - `StoppedAt string`

    RFC 3339 timestamp when work execution stopped

  - `Type Work`

    The type of object (always 'work')

    - `const WorkWork Work = "work"`

### Example

```go
package main

import (
  "context"
  "fmt"

  "github.com/anthropics/anthropic-sdk-go"
  "github.com/anthropics/anthropic-sdk-go/option"
)

func main() {
  client := anthropic.NewClient(
    option.WithAPIKey("my-anthropic-api-key"),
  )
  betaSelfHostedWork, err := client.Beta.Environments.Work.Ack(
    context.TODO(),
    "work_id",
    anthropic.BetaEnvironmentWorkAckParams{
      EnvironmentID: "env_011CZkZ9X2dpNyB7HsEFoRfW",
    },
  )
  if err != nil {
    panic(err.Error())
  }
  fmt.Printf("%+v\n", betaSelfHostedWork.ID)
}
```

#### Response

```json
{
  "id": "id",
  "acknowledged_at": "acknowledged_at",
  "created_at": "created_at",
  "data": {
    "id": "id",
    "type": "session"
  },
  "environment_id": "environment_id",
  "latest_heartbeat_at": "latest_heartbeat_at",
  "metadata": {
    "foo": "string"
  },
  "started_at": "started_at",
  "state": "queued",
  "stop_requested_at": "stop_requested_at",
  "stopped_at": "stopped_at",
  "type": "work"
}
```