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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.

All of v2.1.84 Home All releases olderv2.1.83 v2.1.85newer
Claude Code v2.1.84

TaskCreated Hook Event

What

A new hook event type that fires when a task (e.g., from /loop or teammate creation) is being created.

Details
  • Hook receives JSON input with task_id, task_subject, task_description, teammate_name, and team_name
  • Exit code 0: stdout/stderr not shown
  • Exit code 2: show stderr to model and prevent task creation
  • Other exit codes: show stderr to user but proceed
  • Allows organizations to gate or customize task creation behavior
Evidence

TaskCreated hook (search for "TaskCreated", "When a task is being created")

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 v2.1.84 →