perTaskStopAffordance
A Claude Code settings key, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.
SDK clients can opt in so an interrupt kills only the current turn, not background agents.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.246.
In the changelogs
3Releases whose published page names perTaskStopAffordance.
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v2.1.271
SDK clients can now declare 'rapid followup preempt' support
SDK clients can now declare support for preempting a running task on rapid follow-up input
found in this entry's text
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v2.1.246
New initialize option
perTaskStopAffordancechanges what interrupt killsSDK clients can opt in so an interrupt kills only the current turn, not background agents.
named in this entry, found in this entry's text
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v2.1.246
Per-task stop is first-attached-client-wins and does not survive a worker restart
The first client to attach decides per-task stop behaviour, and it is lost on worker restart.
named in this entry, found in this entry's text
First cited
1The earliest release whose published evidence quoted perTaskStopAffordance was v2.1.246, 25 Aug 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table below.
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 settings key does. All settings keys.