# α close-out — cycle/412

**Cycle:** 412
**Issue:** [cnos#412](https://github.com/usurobor/cnos/issues/412)
**Author:** α (collapsed with γ+β on δ)
**Date:** 2026-05-22

## What α produced

- `src/packages/cnos.cds/docs/empirical-anchor-cdd.md` (new file, 355 lines).
  - Anchor-pin section.
  - "How to read this doc" section.
  - "Cycle-to-surface mapping" section with twelve sub-section mapping tables (§Six-field, §Selection function, §Development lifecycle, §Coordination surfaces, §Artifact contract, §Mechanical vs judgment, §Review CLP, §Gate, §Assessment, §Closure, §Retro-packaging, §Large-file authoring rule).
  - "Closure cycles and INDEX rows" section with compressed receipt-stream table.
  - "Open questions and forthcoming work" section listing v1.0 deep rewrites, `.cdd/`→`.cds/` rename, CCNF-O (#405), handoff package (#404), `#CDSReceipt` schema-driven receipts, surface-by-surface gap distribution.
  - "Related documents" section citing CDS.md, CDD.md, cph anchor, extraction-map, INDEX.md, ROLES.md, cnos issues.
  - "Closing — cnos#412 AC1–AC8 satisfied" section with AC-by-AC verification.

## Sources synthesized

- Issue body of cnos#412 (scope + ACs).
- `src/packages/cnos.cdr/docs/empirical-anchor-cph.md` (structural precedent — read end-to-end at `71b25672`).
- `src/packages/cnos.cds/skills/cds/CDS.md` (surface enumeration via `grep -n "^## "` and `grep -n "^### "`; §Empirical anchor read in detail).
- `.cdd/iterations/INDEX.md` (per-cycle finding/patch/MCA/no-patch counts).
- GitHub issue cnos#412 (authoritative issue body).
- `.cdd/unreleased/<N>/` directories for cycles #388 through #410 (close-out artifact filenames + counts cross-checked against INDEX).
- `git log --all --oneline` filtered to cited cycle numbers (merge SHAs for citation discipline).

## Hard-rule preservation

- `git diff origin/main..HEAD -- src/packages/cnos.cdd/` → 0 lines.
- `git diff origin/main..HEAD -- src/packages/cnos.cdr/` → 0 lines.
- `git diff origin/main..HEAD -- src/packages/cnos.cds/skills/cds/CDS.md` → 0 lines.

## Findings recorded

None. The synthesis surfaced no doctrine drift, no surface-mapping gap, and no CDS surface that lacks a corresponding cnos cycle. The "zero-finding" pattern observed across cycles #406–#410 (the CDS migration wave) is itself a finding *about* the surface stability and is recorded as such in the doc's "Closure cycles and INDEX rows" section, but the synthesis discovered no new α-side gap.

α hands off to β (R1 review).
