definitionNotice
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.
Resuming an in-process teammate can now surface a notice that its agent definition changed
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.268.
In the changelogs
3Releases whose published page names definitionNotice.
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v2.1.268
Resumed in-process teammates now report an agent-definition-change notice
Resuming an in-process teammate can now surface a notice that its agent definition changed
found in this entry's text
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v2.1.268
Teammate resume message can append a definitionNotice
Resuming a teammate can now show an extra definitionNotice message alongside the usual resume text
found in this entry's text
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v2.1.268
Resumed in-process teammate can carry a definitionNotice
Resuming a teammate as an in-process agent can now show an extra notice appended to the success message
found in this entry's text, named in this entry
First cited
3The earliest release whose published evidence quoted definitionNotice was v2.1.268, 10 Sep 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.