- Update gt handoff to detect polecats (via GT_POLECAT env var) and
call gt done instead of respawning - polecats have Witness-managed lifecycle
- Update CLAUDE.md Session End Checklist to use gt handoff
- This is the canonical way to end any agent session - it handles mail,
respawn, and context restoration via SessionStart hook
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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