New rigs now get sync-branch: beads-sync in their .beads/config.yaml automatically. This enables multi-clone coordination for polecats, crew members, and refinery. Also added gt doctor check (beads-sync-branch) to verify existing rigs have sync-branch configured, with --fix support. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>