Stop
A Claude Code hook event, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.
When Claude finishes responding
Anthropic's own wording. Read off Hooks reference, captured 2026-10-22.
In the changelogs
10Releases whose published page names Stop.
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v2.1.295
Hooks can now block the action when they fail
A new hook option set to
blockmakes a hook that fails, times out or returns bad output stop the action it guardsfound in this entry's text
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v2.1.223
Only four hook types produce non-user content
Only Stop, TeammateIdle, TaskCreated and TaskCompleted hooks are treated as internal; other hook feedback reads as your text.
named in this entry
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v2.1.163
SubagentStop Hook Event
found in this entry's text
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v2.1.163
Stop Hook Output Schema with additionalContext
found in this entry's text
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v2.1.133
Reasoning Effort Exposed to Hooks and Bash
found in this entry's text
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v2.1.124
update-configskill prompt rewrittenfound in this entry's text
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v2.1.90
PowerShell Security Improvements
found in this entry's text
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v2.1.78
StopFailure Hook Event
found in this entry's text
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v1.0.41
New SubagentStop Hook Event
found in this entry's text
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v1.0.38
Major Features
found in this entry's text
First cited
0No release's published evidence quotes this name. The ledger indexes the Evidence lines of every changelog on this site, so this says nobody here has ever quoted it; it says nothing about how old the name is.
Presence across releases
0The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.
Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the hook event does. All hook events.