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checkpoint
General-purpose state-saving — save session-restore state mid-session before context exhaustion, between tasks, between sessions, or before starting new heavy work. Writes a pending-restore sentinel so a fresh session can resume exactly where you left off. Also surfaces pending-restore state on --restore. Auto-runs /cleanup on save (trash-moves stale sentinels/old checkpoints) unless --no-cleanup. Use for: /checkpoint, 'save my place', 'checkpoint', 'save session', '/checkpoint --restore', 'restore checkpoint', 'resume from checkpoint'. Does NOT roll up dailies, does NOT touch lessons-learned.md or forgotten/.
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