# β review — Cycle 419

**Cycle:** [cnos#419](https://github.com/usurobor/cnos/issues/419) — Sub 5 of [cnos#404](https://github.com/usurobor/cnos/issues/404)
**Date:** 2026-05-22

## R1

### Verdict: **APPROVE**

### Rationale

The cycle delivers Sub 5 of cnos#404 cleanly:

1. **Receipt-stream sub-skill authored at canonical handoff path.** `src/packages/cnos.handoff/skills/handoff/receipt-stream/SKILL.md` exists at 340 lines (within 200–500 AC2 range). The 10 substantive sections (Core principle / Authority / Scope / §1 Per-finding shape / §2 Aggregator / §3 Cadence rules / §4 Aggregator location / §5 Finding-disposition discipline / §6 Cross-repo trace / §7 Empirical anchors / §8 Related documents / §9 Non-goals / §10 Kata) match the Sub 4 artifact-channel/SKILL.md structural precedent. 88 keyword hits on the AC2 keyword set — well above the ≥ 6 floor.

2. **Per-finding shape preserved verbatim.** The six top-level fields (`Source` / `Class` / `Trigger` / `Description` / `Root cause` / `Disposition`) and the per-disposition sub-fields (`Patch` / `Affects` / `Cross-repo` for `patch-landed`; `Issue filed` / `First AC` for `next-MCA`; `Reason` for `no-patch`) diff verbatim against `cnos.cdd/skills/cdd/post-release/SKILL.md §5.6b` pre-migration content. The class vocabulary (`cdd-skill-gap` / `cdd-protocol-gap` / `cdd-tooling-gap` / `cdd-metric-gap`) is preserved.

3. **INDEX.md row format preserved verbatim.** Eight pipe-separated columns (`Cycle | Issue | Date | Findings | Patches | MCAs | No-patch | Path`) — exact match. The per-row update procedure carries the consistency check `Findings = Patches + MCAs + No-patch` (M = P + A + Z), which is the structural invariant for ε's cross-cycle scan.

4. **Cadence rule preserved verbatim.** `protocol_gap_count > 0` required; courtesy empty-findings stub permitted when 0 (cycle/401 convention); backward-compatibility for prior every-cycle files. The §3.1 / §3.2 / §3.3 sub-organization is structurally cleaner than the original (cadence-rule + courtesy-stub + activation-overlay), but the rules themselves are verbatim.

5. **Disposition vocabulary preserved verbatim.** Three values (`patch-landed` / `next-MCA` / `no-patch`); closed vocabulary; `no-patch` requires `Reason:` per CDS §"Closure" → §"Closure rule"; no fourth disposition added.

6. **Source section becomes pointer (D2 satisfied).** `post-release/SKILL.md §5.6b` is now a 6-line pointer paragraph (well under the ≤ 30-line AC3 ceiling). The §-anchor is preserved for backward-compatible citation. Other sections of post-release/SKILL.md are unchanged (file dropped 488 → 444 lines = 91% of original, above the 80% AC3 floor).

7. **HANDOFF.md updated (D3 satisfied).** All 5 sub-skills now under "### Landed (v0.1)"; receipt-stream entry includes the migration source + the cnos#419 reference. The "Forthcoming (Sub 5)" subsection is removed cleanly. The non-goals row is extended to include per-finding shape / INDEX row format / cadence rule / disposition vocabulary preservation.

8. **extraction-map.md Sub 5 rows updated (D4 satisfied).** §6 rows marked `Status: v0.1 migrated; canonical at cnos.handoff/skills/handoff/receipt-stream/SKILL.md` with destination-§ specificity (per-finding shape → §1; aggregator → §2; cadence → §3; cross-repo trace → §6). The aggregator-data row noted as "content unchanged" matches the AC8 requirement.

9. **Cross-reference repair (D5 satisfied).**
   - handoff/artifact-channel/SKILL.md — 4 "forthcoming" qualifiers dropped; 6 receipt-stream cite hits (AC6 floor: ≥ 1).
   - handoff/cross-repo/SKILL.md — 2 cites of `post-release/SKILL.md §5.6b` repointed to handoff/receipt-stream/SKILL.md.
   - handoff/SKILL.md loader — caveat updated; manifest entry cites cnos#419; "Until Subs 2–5 land" replaced with all-5-landed status.
   - cnos.cdd/skills/cdd/epsilon/SKILL.md — 3 cites of `post-release/SKILL.md §5.6b` repointed; §3 "Cross-references" lists handoff/receipt-stream as canonical + post-release as pointer.
   - cnos.cdd/skills/cdd/activation/SKILL.md — 2 cites of `post-release/SKILL.md §5.6b` repointed.

10. **No behavioral redesign (AC11 spot-check holds).** Per-finding fields verbatim; INDEX row format verbatim; cadence rule verbatim; disposition vocabulary verbatim. No new fields added; no fields renamed; no new dispositions.

11. **Negative-grep checks all clean.**
    - AC7: cnos.cdr untouched (0-line diff).
    - AC8: `.cdd/iterations/INDEX.md` content unchanged (0-line diff; only this cycle's standard close-out row added in β commit per AC8).
    - AC9: schemas/handoff/ absent; schemas/ccnf-o/ absent; cdd-verify / src/go / release.sh untouched.
    - AC10: CDD.md kernel byte-identical (0-line diff against origin/main).

### Findings

None.

### Notes

The cycle continues the pattern established by Subs 2 (#416), 3 (#417), 4 (#418): γ+α+β collapsed on δ; docs-only / package migration; single-session sequential commits under per-role prefixes; the three-ruling pattern (move wholesale; replace source with pointer; update cross-references) mechanically applied. Sub 5 differs in shape only in that it migrates a single section from one consumer (post-release/SKILL.md §5.6b) rather than synthesizing from multiple sources (as Sub 3) or authoring two parallel surfaces (as Sub 4). The migration is operationally cleaner than Sub 4 (smaller diff surface; fewer consumer cross-references) — fourth cycle in a row using the same collapse pattern; operationally stable.

The receipt-stream sub-skill's Authority section names the boundary between this skill (canonical wire-format) and the consumer protocol packages (role-local authoring procedure at post-release; ε's role-local gap-class vocabulary at epsilon) cleanly. The empirical anchors section names cycle/335 (INDEX bootstrap) and cycle/401 (courtesy stub convention) explicitly, matching cnos#419 D1.

The "courtesy stub" convention deserves note: the §3.2 sub-section captures the cycle/401 convention exactly — the cycle that produces this very cycle's own iteration artifact is operating under this convention. The meta-self-coherence (this cycle authors against the new canonical it's establishing) is clean.

After β approves and merges, all 5 handoff sub-skills are Landed. Sub 6 (cross-reference cleanup + close cnos#404 tracker) handles the remaining citation sweep across cdd / cdr / cds and the docs essays.

### Action

Merge `cycle/419` to main with `Closes #419`.
