# γ Close-out — cycle/408

**Issue:** [cnos#408](https://github.com/usurobor/cnos/issues/408) — Sub 3 of #403: Migrate §Selection function + §Development lifecycle to CDS (B-lite thin extract).
**Cycle status:** **CLOSED.**
**Dispatch shape:** γ+α+β collapsed on δ (skill/docs-class cycle per CDS §"Six-field instantiation contract" Field 6 — actor collapse rule; breadth-2026-05-12 wave manifest precedent).
**Branch:** `cycle/408` (created from `origin/main` at `d9829412`).
**Cycle commits:** `d5c93e1e` (γ-408 scaffold), `fb401f99` (α-408 migration), plus this consolidated close-out commit.

## Cycle summary

Sub 3 of the cnos#403 wave: the canonical CDS rules for **engineering-cycle selection** and **engineering development lifecycle** have a canonical home in CDS.md. The migration was scoped B-lite per δ's pinned implementation contract: canonical rule text moved into CDS, operational realization stayed in cnos.cdd role/runtime skills as the v0.1 overlay, no deep role rewrites attempted. The cnos#403 wave continues to Subs 4–5 dispatch.

## Close-out triage table

| Finding | Source | Type | Disposition | Artifact / commit |
|---|---|---|---|---|
| (none) | α-closeout — observations only, no findings | — | — | — |
| (none) | β-review R1 — APPROVED with O1, O2, O3 informational observations (no D/C/B/A-severity findings) | — | — | — |
| (none) | β-closeout — process observations only (collapse pattern continued to hold; AC9 cap healthy; source-pin discipline observation routed forward) | — | — | — |

**Disposition decisions:**

- **β O1 (thin-overlay line-cap iteration friction).** Dropped — the AC9 ≤40-line cap is intentionally tight and produced healthy structural discrimination. No skill patch.
- **β O2 (lifecycle has 14 steps numbered 0–13).** Dropped — informational consistency note; the issue's "0–13 step table" wording is satisfied.
- **β O3 (§Roles cross-cut deferred per B-lite scope).** Routed forward — extraction-map row 2's Status note now explicitly declares the deferral and names the v0.1 overlay surfaces. No action this cycle; the post-#403 v1 role-rewrite cycle will own §Roles migration.
- **α friction-log "source-pin discovery via git history" pattern.** Routed forward as a next-MCA observation — when the wave dispatches future quarantined-content migrations (Subs 4 + 5 of #403), γ scaffolds should name the source-pin commit explicitly. Not a binding patch; the γ/SKILL.md §2.2a peer-enumeration discipline generalises to cover the pattern.
- **β process observation "collapsed-role pattern held for the third successive cycle in #403 wave".** Recorded as wave-shape evidence; no action this cycle.

## §9.1 trigger assessment

| Trigger | Fire condition | Fired? | γ action |
|---|---|---|---|
| Review churn | review rounds > 2 | No (1 round, APPROVED) | None. |
| Mechanical overload | mechanical-class findings > 20% of total findings AND total findings ≥ 10 | No (0 findings total) | None. |
| Avoidable tooling / environment failure | environment or tooling blocked the cycle | No (markdown-only cycle; no tooling failure) | None. |
| Loaded-skill miss | a loaded skill should have prevented a finding | No (no findings to attribute) | None. |

**No §9.1 triggers fired.** No mandatory cycle-iteration entry required.

## §13 independent γ process-gap check

- Did this cycle reveal a recurring friction? **Light yes** — source-pin discovery for the canonical rule text required reading pre-#402 history via `git show 8f06a606^`. This is documented in α-closeout friction-log as a pattern observation. The recurring shape is "when a content-migration cycle dispatches against a 'pending extraction' marker, the migrating agent must pin the pre-rewrite source-of-truth commit." This is captured by general discipline (`gamma/SKILL.md §2.2a` peer-enumeration generalises to source-pin naming for migrations) and does not require a skill patch this cycle.
- Was any gate too weak or too vague? **No.** The pre-merge gates passed cleanly; AC oracles were mechanical and produced unambiguous PASS rows; the B-lite scope ruling's positive/negative criteria gave β a clear discrimination surface.
- Did a role skill fail to prevent a predictable error? **No** — no findings surfaced.
- Did coordination burden show a better mechanical path? **No.** The collapsed γ+α+β-on-δ pattern produced no friction; the wave's third successive collapsed cycle continues to hold the pattern's empirical case.

**Disposition:** No formal trigger fired; the source-pin observation is filed as a friction-log pattern in α-closeout and as a process observation in β-closeout; γ surfaces it forward for the next wave-cycle's γ to consider as a scaffold-field convention but does not patch any skill in this cycle.

## Cycle Iteration

`protocol_gap_count: 0`. No `cds-*-gap` / `cdd-*-gap` finding surfaced. Per the cycle/401 cadence rule (per `ROLES.md §4b.4`), the `cdd-iteration.md` artifact is **not required** when count is 0; a courtesy zero-findings stub is filed at `.cdd/unreleased/408/cdd-iteration.md` per the cycle/401 courtesy convention.

The INDEX.md aggregator row for cycle/408 is filed per the courtesy convention (matching cycle/406 + cycle/407 precedent).

## Configuration-floor declaration

Per `cnos.cdd/skills/cdd/release/SKILL.md §3.8`:

- **β-axis cap:** A- (because β is α collapsed on δ for this skill/docs-class cycle).
- **γ-axis cap:** A- (because γ is α+β collapsed on δ for this skill/docs-class cycle).
- **α-axis cap:** Unbounded (α-axis is not collapsed; α executes the matter directly; the cycle's α-grade is determined by the merit of the matter on review).
- **δ-axis cap:** Unbounded (δ is the dispatch operator; not collapsed).
- **ε-axis cap:** N/A (no cdd-protocol-gap findings; ε did not author this cycle).

The collapse pattern is explicitly acknowledged in `gamma-scaffold.md §"Dispatch shape"` and in `beta-review.md §"Verdict"`. The cap is the structural acknowledgment that an independent β (different agent / different session) would add information the collapsed β cannot, but for skill/docs-class cycles under pinned B-lite contracts, the residual risk is low enough that the cap (rather than blocking the configuration entirely) is correct.

## Skill gap candidate dispositions

None this cycle. No skill loaded by α failed to prevent a finding (because no β finding surfaced).

## Deferred outputs

- **Next-MCA observation.** The cnos#403 wave's next dispatchable subs are Sub 4 (Artifacts + Tracking surfaces migration) and Sub 5 (Review / Gate / Closure / Assessment / Retro-packaging / Mechanical / Non-goals / Large-file migration). Both are P2; both depend on Subs 1 + 2 (landed) + Sub 3 (this cycle). δ may dispatch them in parallel after this cycle merges, or sequentially per the operator's preferred shape.
- **Source-pin scaffold-field convention.** A future cycle's γ may consider naming the source-pin commit explicitly in scaffold when the cycle is a quarantined-content migration. Filed as an observation; no issue created this cycle.

## Hub memory evidence

No hub memory write performed (per the breadth-2026-05-12 collapsed-cycle convention; the hub-memory channel is reserved for cross-cycle dispositions, not per-cycle observations).

## Next-MCA commitment

The cnos#403 wave continues to Subs 4–5 dispatch. δ's discretion on parallel vs sequential. The wave is on planned shape; no wave-shape drift; no contract amendment needed.

## Closure declaration

**Cycle #408 closed.** Next: Subs 4–5 of cnos#403 (per δ's cadence).

This `gamma-closeout.md` is the cycle-closure declaration artifact. β has approved the cycle; α-closeout and β-closeout are filed; the cycle directory at `.cdd/unreleased/408/` contains the full close-out artifact set; the INDEX.md aggregator carries a row; the courtesy `cdd-iteration.md` stub is filed.

Per the cycle merge instruction in the γ dispatch contract, this cycle does NOT self-merge to main; the cycle/408 branch is pushed to origin and the operator effects the merge after reviewing this close-out summary.
