# γ close-out — cycle/393

**Issue:** cnos#393 — δ-as-architect: implementation-contract enrichment at dispatch
**Mode:** design-and-build, γ+α+β-collapsed-on-δ
**Outcome:** APPROVED R1 unconditionally; 4 SKILL patches + 1 issue body edit + closure artifacts landed; merge to main pending.

## Cycle summary

Cycle #393 implements the four `cdd-protocol-gap` findings (F1–F4) that cycle #392's `cdd-iteration.md` forecast. The doctrine "δ-as-architect" — δ as a two-sided membrane with outward (boundary decision on receipts) AND inward (implementation-contract enrichment of γ's contracts going to α) faces — is now first-class doctrine across the four role-skill surfaces:

- α §3.6 "Implementation contract is δ's, not α's"
- β Rule 7 "Implementation-contract coherence"
- γ §2.5 Step 3b dispatch-prompt template adds `## Implementation contract` section (7 axes)
- operator §3a "δ as inward membrane: implementation-contract enrichment at dispatch"

cnos#366 Phase 4 body now absorbs cnos#393 as a design input and names δ as explicitly two-sided. Phase 4's cycle author inherits a clean handoff: the doctrine is pinned, the relocation target (`delta/SKILL.md`) is named, only the relocation + harness substrate carving remain.

## Close-out triage

| Finding | Source | Type | Disposition | Artifact / commit |
|---|---|---|---|---|
| M1 — "This cycle is the patch" (closes #392 cdd-iteration F1–F4) | β close-out F0 + cdd-iteration | meta / drop | drop (the patches ARE the action) | `fdc55950` (4-patch commit) |
| P1 — 4-surface mesh as reusable doctrine-shipping shape | cdd-iteration | pattern / informational | drop (not formal enough to ship as γ rule yet; useful as template) | (informational only) |
| P2 — Meta-cycle: shipping rule + self-applying it | cdd-iteration | pattern / informational | drop (the cycle is the witness) | (informational only) |
| P3 — Phase-N design-prerequisite-anchor pattern | cdd-iteration | pattern / informational | drop (already named in cnos#366 Phase 4 body) | cnos#366 body update |

No `next-MCA` dispositions. No `project-MCI` dispositions. No `agent-MCI` dispositions. Phase 4 of cnos#366 absorbs the Patch D relocation as separately-tracked phase work, not a new MCA from this cycle.

## §9.1 trigger assessment

No triggers fired. R1 APPROVED unconditionally. 0 mechanical findings. No avoidable tooling failure. No loaded-skill miss.

## Cycle iteration

Per `cdd-iteration.md`: 0 protocol/skill/tooling/metric gaps surfaced. The meta-finding is "this cycle shipped." Empty-findings entry recorded; INDEX row will be added because the cycle still produces a `cdd-iteration.md` (the per-cycle closure-gate artifact) even though findings count is 0.

## Cross-skill coherence verification (special rigor per dispatch)

The dispatch named "Special rigor on cross-skill coherence: the 4 patches form a referential mesh — each cites the others." β's review verifies this rigorously:

- **AC6 mesh check** — `beta-review.md` carries a 4×4 mesh table showing 12 of 12 off-diagonal edges populated. Bidirectional pairwise; no missing citation; no circular logical dependency.
- **AC7 anchor check** — `beta-review.md` carries an anchor table showing all 4 patches cite both #389 and #391, plus #392 as the proof-of-concept.

Both checks pass cleanly.

## Phase 4 design-input verification (AC5)

cnos#366 Phase 4 body re-read after the issue_write update. Confirmed:

- New "Update — 2026-05-21 (cnos#393 close-out)" callout sits at the top of the issue body.
- Phase 4 section opens with "δ is **two-sided** — **outward** ... **AND inward** ... Phase 4 must carve both surfaces explicitly."
- Phase 4 `delta/SKILL.md` deliverable bullet reads "boundary complex with two-sided membrane: **outward** ... **AND inward** ... Includes the inward-membrane surface from #393."
- #393 appears as the 5th Phase 4 input bullet ("Names δ as explicitly two-sided membrane (outward + inward) and ships the precursor skill patches ... that Phase 4 absorbs. Phase 4 relocates `operator/SKILL.md` §3a → `delta/SKILL.md` ...").
- Phase dependency graph + sub-issue list updated to name "two-sided membrane: outward + inward" and "bundles #371 + #373 + #384 + #393 inputs."

cnos#366 has not been concurrently modified (no concurrent Phase 4 cycle in flight at the time of writing per the issue-list scan).

## Post-merge work

After β APPROVES, the cycle proceeds to lifecycle step 9 (merge to main per dispatch), then post-merge:

- Comment on cnos#366 noting Phase 4 design input shipped.
- Comments on cnos#389 + cnos#391 noting the protocol patch shipped that closes their failure class.
- Comment on cnos#392 noting the implementation-contract template is now formal doctrine.
- Update `.cdd/iterations/INDEX.md` row for #393.
- Attempt branch delete (expect 403 in this harness; note).

## Closure declaration

**Cycle #393 closed. Next: #394** (or next γ selection per `gamma/SKILL.md` §2.1; no specific next-MCA carried forward from this cycle — the Phase 4 cycle is already tracked at cnos#366 and is not a #393-specific commitment).
