# γ Close-out & Post-Release Assessment — #308

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

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## Post-Release Assessment

### Cycle shape

- **Issue:** #308 (P3, small-change, deferred split from #304)
- **Roles:** γ = OpenClaw/Sigma, α = Claude CLI (Opus), β = Claude CLI (Sonnet)
- **Review rounds:** 1 (R1: Approved, no findings)
- **Merge:** `4700587c` on main, `Closes #308`

### §9.1 trigger check

- Review rounds > 2? **No** (1 round).
- Mechanical ratio > 20%? **N/A** (0 findings total).
- Avoidable tooling/environmental failure? **No** — the I5 cross-package `calls` pre-readiness correction was self-caught by α and fixed on-branch before the readiness signal; not an environmental failure.
- Loaded skill failed to prevent a finding? **N/A** — no findings.

**§9.1 verdict: no MCA triggered.**

### Findings and triage

No findings this cycle. R1 verdict was APPROVED unconditionally.

### Cycle engineering reading

**Diff level: L4** (structural decomposition, content-preserving). The cycle lands the deferred split that cycle #304 PR explicitly named. Three new sub-skills each own one cognitive mode (one reason to change); the monolith is deleted; orchestrator calls array enumerates the new siblings; four live surface cross-references updated; deferred-split note removed. No content rewriting; no phase order change; no new design decisions. The value is organizational: each phase-2 mode can now change independently, and each sub-skill is independently loadable without the full monolith.

**Leverage:** Each of the three phase-2 cognitive modes can now be updated, versioned, or replaced without touching the other two or the orchestrator. Independent loadability means a future α session reviewing only architecture concerns does not need to load the full implementation review surface. The split is permanent and composes cleanly with the existing review/contract/ sibling (added in #304).

**No leverage not achieved:** The issue's stated non-goals held: no content rewriting, no phase reordering, no CTB v0.2 promotion, no per-mode katas added.

### CDD iteration

No process changes indicated. The I5 cross-package `calls` limitation (O6, first logged in #301 close-out) recurred and was handled correctly by α per the established pattern (`calls: []` + prose instruction). No new protocol gap surfaced.

### Cycle invariants observed

- Dyad-plus-coordinator preserved. α owned implementation through readiness; β owned review and merge; γ owns PRA.
- Cycle branch (`cycle/308`) was the canonical coordination surface throughout. All role artifacts committed to that branch before merge.
- α never wrote review artifacts; β never wrote implementation artifacts.
- Single review round — no fix-round required. The cleanest possible cycle shape for this class of structural work.
- Merge done by β under established doctrine (merge is β authority; issue auto-closed via `Closes #308`).

### Outstanding hand-offs to δ

1. Release-boundary preflight per `release/SKILL.md` — #308 is a content/skill-file-only change; no VERSION bump expected unless γ judgment says otherwise. δ determines release boundary.
2. CI confirmation on post-merge main push (I5, I4 gates). Expected green — Markdown/YAML-only diff; all hard-gate frontmatter fields present on new sub-skills.
