25 lines
1.1 KiB
Markdown
25 lines
1.1 KiB
Markdown
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---
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name: Stale worktree references block agent start
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---
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# Bug 3: Stale Worktree References Block Agent Start
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## Symptom
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Starting an agent fails with `git worktree add failed: ... is already used by worktree` even though the worktree directory no longer exists.
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## Root Cause
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When a worktree directory is deleted externally (e.g., `rm -rf` by another agent or manual cleanup) without running `git worktree remove` or `git worktree prune`, git retains a stale reference. The `create_worktree` function in `worktree.rs` checks if the directory exists (line 43) but doesn't handle the case where git still thinks the branch is checked out in a now-deleted worktree.
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## Reproduction Steps
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1. Start an agent (creates worktree and branch)
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2. Delete the worktree directory externally (`rm -rf`)
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3. Try to start an agent for the same story again
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4. Observe: `git worktree add` fails because git still references the old worktree
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## Proposed Fix
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Run `git worktree prune` before attempting `git worktree add` in `create_worktree_sync()`, or handle the "already used" error by pruning and retrying.
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