# β Close-out — #308

skill(cdd/review): split phase 2 into review/issue-contract, review/diff-context, review/architecture siblings

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## Review context

**R1 (β R1):** commits `26dbf93e`, `85675df2`, `530d3432` — APPROVED; no findings.
**Merge commit:** `4700587c` on `main` — `Closes #308`.

**origin/main SHA at each review pass:**
- R1 base: `1d157c7912ec209bfa856901c852d4a6298cc8ca` (fetched synchronously before R1)

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## Narrowing pattern

**R1 → merge:** No fix-round required. All six ACs met on first submission. No C, A, or D findings. The diff was content-preserving; β's review confirmed structural boundaries (one reason to change per sub-skill), path resolution correctness, and stale-path closure in a single pass.

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## Merge evidence

- **Merge commit SHA:** `4700587c17a3f587fdd9395290ad1fcfa4a2da30`
- **Merge form:** `Merge: 1d157c79 530d3432` — real merge commit (`--no-ff`), not fast-forward
- **Author:** `beta <beta@cdd.cnos>`
- **Branch merged:** `cycle/308` (head `530d3432` at merge time)
- **Target:** `main` (was `1d157c79` before merge; same as R1 review base — no main advance during review window)
- **Issue auto-close:** `Closes #308` in merge commit message — confirmed closed via `gh issue view 308`.

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## β-side findings

None. The implementation satisfied all six ACs with concrete oracle evidence. No stale paths remained in live surfaces. Architecture boundaries were intact. The one pre-readiness self-correction α made (cross-package `calls` field on `architecture/SKILL.md` → `calls: []` with prose instruction, commit `63866d92`) was correctly reasoned and within α's scope to fix before the readiness signal.

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## CI state

Branch CI not configured on `cycle/308` (per triadic protocol — no PR; CI gates on main push). Diff is Markdown and YAML only — no Go code, no scripts. I5 (`skill-frontmatter-check`) and I4 (`link-check`) gates expected green on post-merge main push: all three new sub-skills carry all seven hard-gate frontmatter fields; no broken markdown links introduced.

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## Handoff to γ

Merge committed and pushed. β close-out written. γ writes the PRA; δ handles release-boundary preflight.
