# Checkpoint System

```yaml
Create:
  Tag: git tag checkpoint/<type>-$(date +%Y%m%d-%H%M%S)
  Stash: git stash push -m "checkpoint-<operation>-<timestamp>"
  Manifest: .claude/checkpoints/manifest.yml
  Summary: .claudedocs/summaries/checkpoint-<type>-<timestamp>.md

Triggers:
  Auto: Destructive|Refactor|Migration|Permissions|Deploy
  Manual: User request|Risky ops|Experiments

Types: feature|fix|refactor|migrate|deploy|manual

Rollback:
  Full: git reset --hard <checkpoint>
  Selective: git checkout <checkpoint> -- <files>
  Incremental: git revert <commits>
  Stash: git stash pop

Process:
  - Verify checkpoint exists
  - Check working tree
  - Confirm w/ user
  - Create pre-rollback checkpoint
  - Execute & verify
```