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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.33

TeammateIdle and TaskCompleted Hooks

What

New hook types for agent team workflows that allow custom scripts to run at key points.

Details
  • TeammateIdle: Fires when a teammate is about to go idle. Input is JSON with teammate_name and team_name. Exit code 2 prevents idle (teammate continues working).
  • TaskCompleted: Fires when a task is being marked as completed. Input is JSON with task_id, task_subject, task_description, teammate_name, and team_name. Exit code 2 prevents task completion.
Evidence

Hook definitions (search for "When a teammate is about to go idle", "When a task is being marked as completed")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.33 →