- Add .repo.git as shared bare repo for worktrees - Update polecat manager to use bare repo when available - Add git.NewGitWithDir() and CloneBare() for bare repo support - Update gt rig init to create bare repo architecture for new rigs - Refinery and polecats now share branch visibility via shared .git 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>