# V2-P3 Closeout Checklist

Status: Complete
Related: `docs/v2_p3_kickoff.md`

## Goal
Confirm V2-P3 transactionalization + authority hardening outcomes.

## Step progress
- [x] Step 1 of 5 — canonical runtime center module (`memory_engine.py`)
- [x] Step 2 of 5 — session authority groundwork (`session_surface.py` + flush markers)
- [x] Step 3 of 5 — strict enrichment barrier enforcement before flush
- [x] Step 4 of 5 — flush replay/idempotency hardening with tx claim state
- [x] Step 5 of 5 — failure-injection + resume validation + full sweep

## Acceptance criteria
- [x] runtime center exists and is used by turn/flush entrypoints
- [x] session-surface authority is represented in flush checkpoint flow
- [x] flush blocks when enrichment barrier unsatisfied
- [x] flush replay with same tx id is idempotent/deterministic
- [x] induced flush failures can be retried to success with same tx id

## Validation evidence

### Targeted resilience tests
- `tests.test_trigger_orchestrator_flush_recovery`
- `tests.test_trigger_orchestrator_flush`
- `tests.test_memory_engine`
- `tests.test_v2_p2_enforcement_matrix`

### Full regression
- Command: `python -m unittest discover -s tests -p 'test_*.py'`
- Result: **159 passed / 0 failed**

### Eval snapshots
- `memory_execute_eval`: stable vs prior phase (answerable/grounding unchanged)
- `paraphrase_eval`: stable vs prior phase

## Outcome
V2-P3 is complete. Canonical runtime center, strict enrichment barrier, replay-safe flush idempotency, and induced-failure retry behavior are now in place.

## Next phase
Proceed to V2-P4 (surface and schema embodiment closure).
