rictus f883a09317 feat(checkpoint): Add polecat session checkpoint for crash recovery (gt-441j6) ...

Add checkpoint system for polecats and crew workers to recover state
after session crash or context limit.

Features:
- internal/checkpoint package with Checkpoint type
- gt checkpoint write/read/clear commands
- Checkpoint display in gt prime startup
- Auto-detection of molecule, step, hooked bead
- Git state capture (modified files, branch, commit)

The checkpoint captures:
- Current molecule and step being worked
- Hooked bead
- Modified files list
- Git branch and last commit
- Session notes
- Timestamp

Checkpoints are stored in .polecat-checkpoint.json and displayed
during session startup via gt prime.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2026-01-01 18:53:39 -08:00

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