# γ close-out — cycle/397

**Issue:** cnos#397 — Phase 4a of #366 (extract delta/SKILL.md from operator/SKILL.md; δ-as-role; two-sided membrane)
**Cycle branch:** cycle/397
**Mode:** design-and-build; γ+α+β-collapsed-on-δ
**Identity:** delta@cdd.cnos
**Dispatch configuration:** §5.2 single-session δ-as-γ (Claude Code activation) with γ+α+β collapsed onto δ per breadth-2026-05-12 precedent
**Cycle result:** R1 APPROVE; all 7 ACs PASS; merge into main authorised
**Protocol gap count:** 0

## TLDR

| Field | Value |
|---|---|
| Issue | cnos#397 — Phase 4a of #366 |
| ACs | 7 (all PASS) |
| Rounds | 1 (R1 APPROVE) |
| Dispatch config | §5.2 — γ+α+β collapsed on δ |
| Grade floor | A− γ axis (per §5.2 configuration-floor clause, `release/SKILL.md` §3.8) |
| Diff stat | 7 files; +555 / -97 |
| Phase 4b/4c | Remain pending; surfaces untouched per AC7 |

## Triage

R1 APPROVE with no findings. R2 not required.

## Cross-cycle observations

- The two-sided membrane framing landed cleanly in delta/SKILL.md. The 7-axis implementation-contract doctrine (cnos#393) consolidates with the outward boundary-policy + override semantics into one role-skill home, which discharges the discoverability concern Phase 4 of cnos#366 named.
- The split between role-policy (moved to delta/) and mechanics (retained in operator/) makes Phase 4b (harness substrate) and Phase 4c (release-effector) cleanly separable: Phase 4b will claim §5 Dispatch configurations + §5.2.1 quiescence + §8 timeout recovery (these are harness mechanics that today live in operator/); Phase 4c will claim §3.4 `scripts/release.sh` runbook (this is release-effector mechanics).
- One small enrichment landed beyond pure extraction: the override semantics in delta/SKILL.md §3 explicitly cite the cnos#367 verdict-vs-decision biconditional (`receipt is degraded ⇔ boundary.override != null`). This was AC4-mandated; the cnos#367 freeze previously lived only in RECEIPT-VALIDATION.md §Q4 + §"ValidationVerdict vs BoundaryDecision". Anchoring it in the δ-role skill brings the doctrine to the actor that records overrides — which is the discoverability rationale.

## Unresolved debt

None.

## Next commitments

- Phase 4b of cnos#366 (harness substrate) — file when ready.
- Phase 4c of cnos#366 (release-effector) — file when ready.
- After Phase 4b and Phase 4c land, Phase 5 of cnos#366 (γ shrink) is unblocked.

## Closure

cycle/397 closed. Merge into main authorised by β. δ executes the merge + close cnos#397 + comment on cnos#366 per dispatch instructions.
