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HomeDocsClaude Code CLI 7 Nov 2026
One change · claude-code

Hooks reference changedhooks

Upstream edited this page at 7 Nov 2026 19:18 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 7 Nov 2026 19:37 UTC.

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From line 2,162 where the diff opens
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from line 2162
21622162| Field | Description |
21632163| :- | :- |
21642164| `behavior` | `"allow"` grants the permission, `"deny"` denies it. [Deny and ask rules](https://code.claude.com/docs/en/permissions.md#manage-permissions) are still evaluated, so a hook returning `"allow"` doesn't override a matching deny rule |
2165| `updatedInput` | For `"allow"` only: modifies the tool's input parameters before execution. Replaces the entire input object, so include unchanged fields alongside modified ones. The modified input is re-evaluated against deny and ask rules |
2165| `updatedInput` | For `"allow"` only: modifies the tool's input parameters before execution. Replaces the entire input object, so include unchanged fields alongside modified ones. The modified input is re-evaluated against deny and ask rules. `AskUserQuestion` and `ExitPlanMode` [need this field](#allow-with-updatedinput) |
21662166| `updatedPermissions` | For `"allow"` only: array of [permission update entries](#permission-update-entries) to apply, such as adding an allow rule or changing the session permission mode |
21672167| `message` | For `"deny"` only: tells Claude why the permission was denied |
21682168| `interrupt` | For `"deny"` only: if `true`, stops Claude |
from line 3741
37413741* **Exits with code 2**: Claude Code ignores a `hookSpecificOutput` printed by the same hook
37423742* **Prints a top-level `"decision": "block"`**: the block overrides an `action` in the same output
37433743 
3744When several hooks match the same request, a decline from one of them overrides an `accept` or `cancel` from anoth
3744When several hooks match the sam
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