Safety · Layer 4

Rollback System

Manual

/undo                  # last change
/undo 3                # last three
/undo --list           # what can be reverted
/undo --to=snap_xxx    # point-in-time restore
/undo --all            # entire session
/undo --dry-run        # preview

Automatic

Task failure during verification triggers a full rollback: snapshots restored in reverse order, task-created files deleted, directories cleaned.

Snapshots

{
  "id": "snap_a1b2c3d4",
  "operation": "edit",
  "target": "src/auth.py",
  "diff": "@@ -10,7 +10,12 @@ …"
}

stored in ~/.wow-agent/snapshots/
cross-restart persistent
WOW_MAX_SNAPSHOTS=1000, TTL 30 days
/undo --verify checks integrity

Tips

Label risky checkpoints: /snapshot create "before-refactor"
Dry-run first when unsure
Combine with git for milestone commits