---
milestone: v1.0
audited: 2026-06-12T09:30:00Z
status: passed
scores:
  requirements: 7/7
  phases: 1/1
  integration: 1/1
  flows: 1/1
gaps:
  requirements: []
  integration: []
  flows: []
tech_debt:
  - phase: 01-ceiling-save-on-exit
    items:
      - "Test-realism note: TEST-03 exercises the outer __aexit__ exception guard by monkeypatching _save_state_to_file; in production the helper's inner guard catches I/O errors first, making the outer guard unreachable. This is the deliberate D-03 belt-and-braces design (the outer guard exists to survive future helper edits), not a defect."
nyquist:
  compliant_phases: [1]
  partial_phases: []
  missing_phases: []
  overall: compliant
---

# Milestone v1.0 Audit — Ceiling Save-on-Exit

**Audited:** 2026-06-12
**Status:** PASSED — 7/7 requirements satisfied, no critical gaps.

## Requirements Coverage (3-source cross-reference)

| REQ-ID | Description | Phase | VERIFICATION.md | SUMMARY frontmatter | REQUIREMENTS.md | Final |
|--------|-------------|-------|-----------------|--------------------|-----------------|-------|
| CEIL-01 | Save state on exit when `state_file` set | 1 | passed | listed | `[x]` | satisfied |
| CEIL-02 | No write when `state_file=None` | 1 | passed | listed | `[x]` | satisfied |
| CEIL-03 | Save failure logged + swallowed; body exception propagates | 1 | passed | listed | `[x]` | satisfied |
| CEIL-04 | Existing `__aenter__`/`close()` behaviour unchanged | 1 | passed | listed | `[x]` | satisfied |
| TEST-01 | Test proves write on exit | 1 | passed | listed | `[x]` | satisfied |
| TEST-02 | Test proves no-op without `state_file` | 1 | passed | listed | `[x]` | satisfied |
| TEST-03 | Test proves exception propagation + swallowed save error | 1 | passed | listed | `[x]` | satisfied |

Orphaned requirements: none. PERS-01 is v2/deferred (out of milestone scope, recorded in traceability as Deferred).

## Phase Verification

| Phase | Status | Score | Security | Review | Nyquist |
|-------|--------|-------|----------|--------|---------|
| 1 — Ceiling Save-on-Exit | passed | 4/4 must-haves | threats_open: 0 (3/3 closed, ASVS L1) | 6/6 findings fixed (all_fixed) | COMPLIANT |

## Cross-Phase Integration

Single-phase milestone — no cross-phase wiring expected. Integration checker verified:

- **Exports connected:** `CeilingLight`/`CeilingLightState` exported via `lifx.devices` and `lifx` (`__all__` confirmed); `__aexit__`, `_save_state_to_file`, `_load_state_from_file`, `from_ip` all live.
- **E2E flow complete:** enter (validate product + load state) → mutate (per-operation saves) → exit (`asyncio.to_thread` save, atomic temp-file + `os.replace` write, merge-not-replace of the on-disk entry) → close (unconditional `super().__aexit__()`) → re-enter restores state. Save and load JSON schemas match — no drift introduced by the review fixes.
- **Orphaned exports:** 0. **Missing connections:** 0. **Broken flows:** 0.

## Tech Debt

One non-blocking note (see frontmatter): the outer `__aexit__` guard is production-unreachable while the inner `_save_state_to_file` guard exists — by design (D-03 belt-and-braces). No action required.

## Definition of Done

Milestone goal: "Exiting a `CeilingLight` `async with` block reliably persists current state to disk — no uplight/downlight state is silently lost on context exit." Achieved and verified: goal verification 4/4, security audit clean, code review fully resolved (including the user-approved D-01 revision to `asyncio.to_thread`), full suite green (2500 tests), pyright and ruff clean.
