# β Close-Out — Issue #353

## Review Context

**Cycle:** #353 — cdd/operator: Add §5.2.1 parent-session quiescence invariant  
**Mode:** docs-only (no version bump, no code changes)  
**Priority:** P2 — empirically-anchored failure mode prevention  
**Base SHA:** dc65c7e552414991c3b201513015412c5cf1ac42 (origin/main at cycle creation)  
**Reviewed SHA:** 678d6733e8d7b41c5949b9e4db2dd9bb11e44e25 (cycle/353 at approval)  
**Review rounds:** 1 (R1: APPROVED)  

### Review Summary

**Contract Integrity (Phase 1):** ✅ PASS  
- Status truth preserved, canonical sources verified
- Scope/constraints consistent, proof shape adequate
- Issue body aligns with self-coherence analysis

**Issue Contract Walk (Phase 2a):** ✅ PASS  
- All 3 ACs verified present in diff
- Named doc updates confirmed (`cdd/operator/SKILL.md` §5.2.1)
- CDD artifacts complete, active skills consistently applied

**Diff Context Inspection (Phase 2b):** ✅ PASS  
- No authority-surface conflicts
- Module-truth audit confirms consistency with existing §5.2 framing
- Process overhead justified with empirical failure mode anchor

**Architecture Check (Phase 2c):** ✅ NOT ACTIVE  
- Documentation-only change, no architectural boundaries touched

**Findings:** Zero findings at any severity  
**CI Status:** Green (Build workflow success)

## Merge Evidence

**Merge SHA:** 340aeddf3a108f276c7fa765f948a742e142f71c  
**Merge timestamp:** 2026-05-12 (β review completion)  
**Merge method:** `git merge cycle/353 --no-ff` with `Closes #353`  
**Files merged:**  
- `.cdd/unreleased/353/self-coherence.md` (α implementation evidence)
- `.cdd/unreleased/353/beta-review.md` (β review artifact)  
- `src/packages/cnos.cdd/skills/cdd/operator/SKILL.md` (+24 lines §5.2.1)

**Oracle verification post-merge:**  
- `rg 'Parent.session quiescence|quiescent' src/packages/cnos.cdd/skills/cdd/operator/SKILL.md` → 2 hits ✅  
- `rg 'worked example|when this is violated' src/packages/cnos.cdd/skills/cdd/operator/SKILL.md` → 1 hit ✅  
- `rg 'parallel sub.agent|concurrent.*sub.agent' src/packages/cnos.cdd/skills/cdd/operator/SKILL.md` → 1 hit ✅

## Cycle Findings

**Process observations:**  

1. **Oracle-driven AC verification pattern worked well.** Each acceptance criterion included a mechanical `rg` query for verification. α provided oracle results in self-coherence implementation evidence; β re-verified oracles during review. This created reliable AC confirmation without ambiguity.

2. **Empirical anchor strengthens documentation value.** Issue references tsc cycle #36 corrupted commit incident as the concrete failure mode this documentation prevents. Having a real incident (not hypothetical) as the motivating example made the problem scope and solution clear.

3. **Clean docs-only cycle execution.** No CI dependencies, no version considerations, no cross-repo coordination required. The cycle completed with minimal overhead - appropriate for the documentation scope.

**Protocol observations:**  

1. **Single-session §5.2 configuration performed as expected.** β operated as single-session δ-as-γ via Agent tool without coordination difficulties. No branch sprawl (cycle stayed on single `cycle/353` branch), no harness push restrictions encountered.

2. **Review phases maintained independent judgment.** Contract integrity, issue contract walk, diff inspection, and architecture check each contributed distinct verification value. No phase redundancy observed.

**No new findings.** The cycle delivered what it promised without uncovering process gaps or skill deficiencies requiring follow-up action.

## Release Evidence

**Release readiness:** ✅ READY for δ tag  
**Merge status:** Complete — merged to main with proper close message  
**Disconnect mode:** docs-only per §2.5b (no version bump required)  
**Cycle directory movement:** `.cdd/unreleased/353/` → `.cdd/releases/docs/{ISO-date}/353/` at docs-only disconnect  
**Post-merge artifact completeness:** self-coherence.md, beta-review.md, beta-closeout.md (this file) present

**Note for γ:** This cycle is ready for docs-only disconnect per `release/SKILL.md` §2.5b. No tag required; merge commit hash is the disconnect signal. Cycle directory should move to `.cdd/releases/docs/2026-05-12/353/` during γ close-out.

---

**Voice:** Factual observations and patterns. Cycle delivered target documentation without complications. Review protocol functioned correctly. Ready for γ post-release assessment.