- `FOLD` → reconcile `architecture.md`, `plan.md`, `tasks.md`, and `traceability.md` atomically; invalidate Vet/readiness; Vet.
- `GUARD_AND_REPAIR` → no planning writes; Spec Drift Guard → Clarify → Plan repair → Vet.
- `BLOCKED_INPUT` → no planning writes; exact diagnostic; recover input; reclassify.