# β close-out — cycle/409 / cnos#409

**Cycle:** Sub 4 of cnos#403 — Migrate §Coordination surfaces + §Artifact contract to CDS.md (B-lite thin extract)
**Branch:** cycle/409
**Review state:** R1 APPROVED (see `beta-review.md` for the verdict and per-AC oracle table)
**Merge state:** pending operator approval (β does NOT merge in this cycle per the issue body)

## Review context (factual observations — no dispositions)

This was a single-round review. β self-reviewed under β-α-collapse-on-δ; the configuration-floor cap on α-axis and β-axis at A- is the structural acknowledgment that the collapsed-actor configuration trades review-independence for cycle velocity on canonical-content moves. The cycle's matter is doctrine authoring; there is no executable surface; the AC oracles are mechanical (grep/diff/find) or read-check (the re-rooting documentation and the operational realization pointers).

Verdict: R1 APPROVED, no fix round.

## Merge evidence (forward-looking)

When operator merges `cycle/409` into main:
- Expected merge commit: a merge of `cycle/409` (head `7e245f45`) into `main` (currently at `5f13f61c`).
- Expected merge commit message: `Merge cycle/409: Sub 4 of #403 — migrate §Coordination surfaces + §Artifact contract to CDS (B-lite thin extract). Closes #409.`
- Branch state after merge: `cycle/409` may be deleted on origin (γ session branch cleanup); the close-out artifact set under `.cdd/unreleased/409/` lands on main and stays there until release-time move per §Frozen snapshot rule.

The merge is not executed by β in this cycle. The operator (γ@cnos) performs the merge; this close-out documents the merge shape for traceability.

## β-side findings (factual; γ triages)

No binding findings. The R1 review's three informational notes (B1 — `Monitor` reference; B2 — full STATUS state machine depth; B3 — legacy/scratch column preservation) are recorded in `beta-review.md`; each was a coherent design decision in the α work; none requires γ disposition.

## Review-quality observations

- AC oracles were authored to be mechanically verifiable at scaffold time (γ's AC oracle approach section names a grep / find / diff command for each AC). All 10 ACs verified mechanically against branch HEAD at review time; no read-check ambiguity required β judgment beyond reading the cited surfaces.
- The β-α-collapse-on-δ pattern works well for canonical-content-move cycles where the source content is well-defined (pre-#402 CDD.md at a specific commit) and the destination is a single well-defined surface (two new top-level sections in CDS.md). The dispatch shape would be inappropriate for cycles with novel executable surfaces; for this cycle's matter class it's the right configuration.
- The "Pointers, not duplication" discipline held: every operational mechanic that exists in `cnos.cdd/skills/cdd/` is cited from CDS.md's new sections via the `### Operational realization` sub-heading; no operational walkthrough was duplicated into CDS.md. This is the B-lite invariant β verified across both new top-level sections.

## Narrowing pattern across rounds

N/A — single round (R1 APPROVED). No narrowing pattern; the cycle converged on first review.

## Configuration-floor declaration

Per CDS §Field 6 (Actor collapse rule), this cycle ran β-α-collapse-on-δ for a skill/docs-class cycle. Per `cnos.cdd/skills/cdd/release/SKILL.md §3.8`, the configuration-floor caps α-axis and β-axis at A- under this collapsed-actor configuration. The collapse is explicitly acknowledged in:
- `gamma-scaffold.md §"Dispatch shape"` (γ-side)
- `gamma-closeout.md §"Configuration-floor declaration"` (γ-side, to be authored)
- `beta-review.md` reviewer-ask-list table (α = A-, β = A-, γ = A; weakest-axis cap structural)
- This close-out (β-side acknowledgment)

γ-axis is not collapsed — γ scaffolded with a separate session/identity; γ-axis is A.
