claude-code-system-prompts/system-prompts/tool-description-taskupdate.md
2026-06-12 10:12:09 -06:00

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Use this tool to update a task in the task list.

When to Use This Tool

Mark tasks as resolved:

  • When you have completed the work described in a task

  • When a task is no longer needed or has been superseded

  • IMPORTANT: Always mark your assigned tasks as resolved when you finish them

  • After resolving, call TaskList to find your next task

  • ONLY mark a task as completed when you have FULLY accomplished it

  • If you encounter errors, blockers, or cannot finish, keep the task as in_progress

  • When blocked, create a new task describing what needs to be resolved

  • Never mark a task as completed if:

    • Tests are failing
    • Implementation is partial
    • You encountered unresolved errors
    • You couldn't find necessary files or dependencies

Delete tasks:

  • When a task is no longer relevant or was created in error
  • Setting status to deleted permanently removes the task

Update task details:

  • When requirements change or become clearer
  • When establishing dependencies between tasks

Fields You Can Update

  • status: The task status (see Status Workflow below)
  • subject: Change the task title (imperative form, e.g., "Run tests")
  • description: Change the task description
  • activeForm: Present continuous form shown in spinner when in_progress (e.g., "Running tests")
  • owner: Change the task owner (agent name)
  • metadata: Merge metadata keys into the task (set a key to null to delete it)
  • addBlocks: Mark tasks that cannot start until this one completes
  • addBlockedBy: Mark tasks that must complete before this one can start

Status Workflow

Status progresses: pendingin_progresscompleted

Use deleted to permanently remove a task.

Staleness

Make sure to read a task's latest state using TaskGet before updating it.

Examples

Mark task as in progress when starting work:

{"taskId": "1", "status": "in_progress"}

Mark task as completed after finishing work:

{"taskId": "1", "status": "completed"}

Delete a task:

{"taskId": "1", "status": "deleted"}

Claim a task by setting owner:

{"taskId": "1", "owner": "my-name"}

Set up task dependencies:

{"taskId": "2", "addBlockedBy": ["1"]}