worktreeBranch
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.
Agent records keep their worktree history across saves, so lineage info no longer gets wiped.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.222.
In the changelogs
6Releases whose published page names worktreeBranch.
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v2.1.269
Agent resume gains worktreeBranch and name validation groundwork
Resuming an agent now validates its worktree branch and name before proceeding
found in this entry's text, named in this entry
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v2.1.260
Minor formatting fix in worktree-removal tool result
Worktree-removal result formatting was cleaned up with no behavior change.
found in this entry's text
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v2.1.257
Forked background sessions get an explicit worktree warning injected into transcript
A forked background session now gets a transcript message warning it never to edit the parent worktree.
found in this entry's text
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v2.1.248
Worktree exit dialog no longer pretends an uncountable branch has zero commits
Leaving a worktree warns about possible unpushed commits instead of claiming zero.
found in this entry's text
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v2.1.222
Agent state writes preserve worktree provenance
Agent records keep their worktree history across saves, so lineage info no longer gets wiped.
found in this entry's text
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v2.1.119
Spawn Mode for Worktree Isolation
found in this entry's text
First cited
2The earliest release whose published evidence quoted worktreeBranch was v2.1.248, 27 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.