When multiple clones commit to beads-sync branch and histories diverge,
git merge would fail. This replaces git's commit-level merge with a
content-based merge that extracts JSONL from base/local/remote and
merges at the semantic level.
Key changes:
- Add divergence detection using git rev-list --left-right
- Extract JSONL content from specific commits for 3-way merge
- Reset to remote's history then commit merged content on top
- Pre-emptive fetch before commit to reduce divergence likelihood
- Deletions.jsonl merged by union (keeps all deletions)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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