Hooks reference changedhooks
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22522252### TaskCreated
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2254Runs when a task is being created via the `TaskCreate` tool. Use this to enforce naming conventions, require task descriptions, or prevent certain tasks from being created.
2254Runs when a task is being created via the `TaskCreate` tool. Use this to enforce naming conventions, require task descriptions, or prevent certain tasks from being created. In a [session without the Task tools](/docs/en/tools-reference#task-tool-availability), this event doesn't fire.
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22562256TaskCreated hooks don't support matchers and fire on every occurrence.
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32213221| `model` | no | Model to use. Defaults to a fast model |
32223222| `timeout` | no | Timeout in seconds. Default: 60 |
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3224The response schema is `{ "ok": true }` to allow or `{ "ok": false, "reason": "..." }` to block. On `ok: false`, Claude Code handles an agent hook the way it handles a [prompt hook with `continueOnBlock: true`](#response-schema) on the same event; agent hooks have no `continueOnBlock` field, and don't support the prompt-hook `impossible` field.
3224The response schema is `{ "ok": true }` to allow or `{ "ok": false, "reason": "..." }` to block. On `ok: false`, Claude Code handles an agent hook the way it handles a [prompt hook with `continueOnBlock: true`](#response-schema) on t
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