- Add git worktree prune as first recovery step before branch deletion to release stale locks
- Add git update-ref -d fallback when git branch -D fails on corrupted references
- Handle stale references in the fallback conflict path (not just primary path)
- Expand invalid-reference pattern matching to cover additional error outputs (unable to resolve reference, stale file handle, not a valid ref, unable to delete ref)
- Add detailed logging at each recovery step for operational traceability
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