# β close-out — cycle/413

**Cycle:** cnos#413 — Activate Sigma; case (d.2) cross-repo bundle for cn-sigma.
**Role:** β (collapsed onto δ; γ+α+β-collapsed-on-δ per `ROLES.md §4`-precedent for skill/docs-class cycles).
**Verdict from R1:** APPROVED. All AC1–AC9 PASS. No findings. Merge-ready.

## What β verified

Per `beta-review.md`:

1. **R1 AC verification (independent re-run).** All 9 ACs PASS independently. β's re-run matches α's self-coherence verdict.
2. **Implementation-contract conformance** (per `beta/SKILL.md` Rule 7 from cnos#393). All 7 axes pinned by δ at dispatch were honored by α. No implementation-contract drift.
3. **Doctrine-locality + case-identification check** (per `cross-repo/SKILL.md §4`). All four §4 checks PASS: case-identification (§4.1), STATUS (§4.2; N/A for case (d)), archival (§4.3), doctrine-locality (§4.4).
4. **Substantive spot-checks** of each deliverable beyond mechanical oracle. LINEAGE.md correctly cites case (d.2) doctrine; patches use canonical header form; all 6 persona rules + 3 operator sub-rules + 3 anti-gaming attacks + TSC-observation rule present with correct content; anchor doc covers all 10 rules with cycles cited.

## Non-blocking observations (not findings)

Three observations recorded in `beta-review.md`; none requires fix-rounds:

1. **Anchor doc line count.** 253 lines vs. issue body's ~300–400 aspirational target. AC6 mechanical oracle satisfied; content comprehensive across 10 rules + 5 synthesis sections. Lifting to a finding would require the line count to be a binding AC, which it is not.

2. **`@@ EOF @@` precedent improvement.** α's patches use proper `@@ -L,M +L,N @@` hunks with placeholder line numbers + trailing-context anchors + `git apply --recount` apply-command instruction, improving on the discipline-section-2026-05-19 precedent (which shipped non-parseable `@@ EOF @@` markers). Positive observation; suggests `cross-repo/SKILL.md §2.7` may want to ratify this pattern as the canonical form for content-anchored patches without exact line-number knowledge. ε signal: protocol gap potential.

3. **Hat-collapse documentation for case (d).** LINEAGE.md documents the γ+α+β-collapsed-on-δ collapse per `cross-repo/SKILL.md §2.9` even though §2.9 only formally requires hat-collapse acknowledgment for case (c) bilateral bundles. Over-conformance; suggests §2.9 could be extended to formally require hat-collapse acknowledgment for case (d) when the bundle is collapsed-role-authored. ε signal: protocol gap potential.

## Implementation-contract observation

For docs-only cycles (like this one), `beta/SKILL.md` Rule 7's implementation-contract check fires trivially (most axes are N/A). The rule operates correctly — it confirms conformance without manufacturing findings. The rule's primary failure-class target is code-bearing cycles (cnos#389 / cnos#391 Python-vs-Go drift); β confirms the rule operates safely in the docs-only regime.

## Hand-off to γ

R1 verdict is APPROVED. γ files close-outs (α/β/γ-closeout + cdd-iteration stub + INDEX.md row) and pushes the branch. Bundle is `drafted (operator-pending)` on cn-sigma side; cycle is closeable on cnos side.

Filed by β@cnos (γ+α+β-collapsed-on-δ) on 2026-05-22.
