# β Close-out — cycle/408

**Issue:** [cnos#408](https://github.com/usurobor/cnos/issues/408) — Sub 3 of #403 (§Selection + §Lifecycle migration to CDS, B-lite thin extract).
**Dispatch shape:** β-α collapsed on δ (skill/docs-class cycle).
**Verdict:** APPROVED at R1 (single round; no findings).
**Review base SHA:** `d9829412` (`origin/main` at review time).
**Review head SHA:** `fb401f99` (α-408 commit).
**Configuration-floor cap:** β-axis at A- per `release/SKILL.md §3.8`.

## Review summary

Single-round review (R1 APPROVED). All AC1–AC9 PASS:
- AC1, AC2, AC3, AC4, AC8, AC9 — mechanical (grep + line count + git diff + wc) — independently re-run from α self-coherence.
- AC5 — read-check — both new sections end with an "Operational realization" sub-section that cites at least one cdd role-skill file.
- AC6, AC7 — hard-rule mechanical (`git diff origin/main..HEAD -- src/packages/cnos.cdd/` and `-- src/packages/cnos.cdr/` both return 0 lines).

The B-lite scope ruling was the load-bearing constraint; β verified both negative failure modes were avoided ("pure A" pointer-only — avoided because canonical rule text moved; "pure B" full v1 rewrite — avoided because no role-overlay files added under `skills/cds/{alpha,beta,gamma,delta,epsilon,operator}/`).

## Implementation assessment

α's diff is mechanically clean and contract-conformant:

- **Surface scope** — 4 files modified / created under `src/packages/cnos.cds/` (CDS.md edit; extraction-map.md Status update; selection/SKILL.md + lifecycle/SKILL.md new files). The scope matches the pinned package-scoping axis exactly.
- **Hard-rule conformance** — `cnos.cdd/` + `cnos.cdr/` diffs are empty.
- **Content quality** — the migrated rule text reads with engineering-discipline framing (CDS-prefix vocabulary where appropriate; "engineering loss function" / "engineering substrate" / "engineering-cycle structure" replaces the generic CDD wording from pre-#402 where the protocol-distinction matters). No mechanical-translation artifacts (e.g. no "CDD §X.Y" anchors left dangling in the new CDS body; cross-references properly point at CDS sub-anchors or at cdd surfaces via the "Operational realization" pointer).
- **Granular anchor preservation** — every fine-grained anchor cited from the pre-#402 CDD.md by the cdd role skills has an equivalent fine-grained sub-heading in the new CDS surface. A future Sub 6 re-pointing sweep will land cleanly.

## Technical review

**Section ordering.** §Selection (lines 778–961) precedes §Development lifecycle (lines 963–1219); both are inserted between §"Six-field instantiation contract" (ending ~line 773) and §"Empirical anchor" (starting line 1221). The placement matches the issue's §D1+D2 spec exactly. The horizontal-rule separators (`---`) bound each section symmetrically with the existing structural pattern in CDS.md.

**Manifest update.** The HTML-comment section manifests at lines 1–2 of CDS.md were updated to include `selection-function` and `development-lifecycle` in both the `sections:` and `completed:` lists. This satisfies the §Large-file resumption protocol convention for future authoring against CDS.md.

**Version-status update.** The preamble metadata at line 15 was updated from "Sub 2 of cnos#403" to "Subs 2–3 of cnos#403" with explicit mention of the B-lite extract; the status note correctly identifies that Subs 4–5 remain downstream. The version remains 0.1 because this cycle does not ship a new doctrinal layer — it ships the next two surfaces of the v0.1 instantiation.

**Pointer discipline.** β re-grepped CDS.md against the CCNF kernel files (`COHERENCE-CELL.md`, `COHERENCE-CELL-NORMAL-FORM.md`, `RECEIPT-VALIDATION.md`): no kernel content duplicated; one inline citation of `COHERENCE-CELL-NORMAL-FORM.md §Recursion Modes` in §Lifecycle's state machine section, used as a reference for the within-scope-vs-cross-scope distinction.

**Thin-overlay structural shape.** Both `selection/SKILL.md` and `lifecycle/SKILL.md` carry frontmatter (with `status: v0.1-thin-overlay`), a delegation declaration, a canonical-home pointer, a v0.1-overlay pointer enumeration, and a v1-transition note. Both are within the ≤ 40-line cap. They serve discoverability without claiming canonical authorship.

## Process observations

- The collapsed β-α-on-δ pattern produced no friction this cycle: the canonical-content-migration matter class is structurally suited to collapse (no novel executable surface; mechanical correctness verifiable from spec + source-pin diff; no β-axis-information-asymmetry the independent-β oracle would catch). This is the third cycle in the cnos#403 wave (after Subs 1 + 2) executed under this pattern; the breadth-2026-05-12 wave manifest precedent continues to hold.

- The AC9 ≤ 40-line cap on thin overlays produced two trim iterations during α authoring. The cap is intentionally tight; the iterations cost roughly 5 minutes total. The cap is a healthy structural discriminator (it prevents thin overlays from drifting into deep-rewrite territory) and not a process problem. No action.

- The source-pin discovery for the canonical rule text required reading pre-#402 CDD.md via `git show 8f06a606^:...`. The `gamma/SKILL.md §2.2a` peer-enumeration-at-scaffold-time rule covers the discipline ("name explicitly in §Gap — additive framing or consolidation framing"); for content-migration cycles, the source-pin commit naming would benefit from being called out explicitly. This is an α-side / γ-side scaffold-authoring observation, not a finding; the next cycle's γ may want to include "source-pin commit" as an explicit scaffold field when the cycle is a quarantined-content migration. No mandatory patch; observation for the wave continuation.

## Release notes (per `release/SKILL.md`)

This sub does not ship a release on its own. Subs 4–5 of cnos#403 land downstream; when the cnos#403 wave reaches release-readiness (Subs 6 + 7 close), a release will bundle the multi-sub wave's deliverables. The cycle/408 close-outs frozen under `.cdd/unreleased/408/` will move to `.cdd/releases/{X.Y.Z}/408/` at that release per `release/SKILL.md §2.5a`; nothing else to release-prepare this cycle.

## Next-action handoff

To γ-closeout: declare cycle closure once all close-out artifacts exist on `cycle/408`; the wave continues to Subs 4–5 dispatch under δ's cadence. No β-side outstanding work; β exits.
