# cdd-iteration — cycle/419

**Issue:** [cnos#419](https://github.com/usurobor/cnos/issues/419)
**Date:** 2026-05-22
**Cycle:** 419 (Sub 5 of cnos#404 wave)
**Receipt status:** `protocol_gap_count: 0` — courtesy stub per cycle/401 convention

## Cadence

Per the receipt-stream canonical doctrine now resident at [`cnos.handoff/skills/handoff/receipt-stream/SKILL.md §3`](../../../src/packages/cnos.handoff/skills/handoff/receipt-stream/SKILL.md): the per-cycle iteration artifact is required only when `protocol_gap_count > 0`; the courtesy empty-findings stub is permitted (not required) when `protocol_gap_count == 0` per the cycle/401 convention. This cycle's receipt carries `protocol_gap_count: 0`; the artifact is **optional**. This stub is written as courtesy.

**Meta-note:** this is the first cycle to author its own `cdd-iteration.md` against the new canonical doctrine the cycle is itself establishing. Per receipt-stream/SKILL.md §1 (the per-finding shape is preserved verbatim from the pre-migration canonical), this stub's structural form is identical to one written under the old canonical at `post-release/SKILL.md §5.6b`. The migration is shape-preserving by construction; no meta-self-coherence problem arises.

## Findings

None.

- 0 `cdd-skill-gap` findings
- 0 `cdd-protocol-gap` findings
- 0 `cdd-tooling-gap` findings
- 0 `cdd-metric-gap` findings

No findings of any class. No patches landed; no MCAs filed; no `no-patch` reasons recorded.

## Why no findings

The cycle's matter was a single-section package migration: extract the cdd-iteration receipt-stream + INDEX.md aggregator doctrine from `cnos.cdd/skills/cdd/post-release/SKILL.md §5.6b` (48 lines of canonical content) into a new canonical sub-skill at `cnos.handoff/skills/handoff/receipt-stream/SKILL.md` (340 lines), with §5.6b rewritten as a 6-line pointer and consumer cross-references repaired. The dispatch contract (γ scaffold + 7-axis implementation contract + 11 ACs + open-question rulings + boundary decisions) covered every authoring decision. The collapse call — γ+α+β collapsed on δ; docs-only / package migration; sequential same-session commits — was operationally clean per the Sub 2 / Sub 3 / Sub 4 precedent.

No protocol gap surfaced because:

- The Sub 2 / Sub 3 / Sub 4 precedent provided a stable three-ruling pattern (move wholesale; replace source with pointer; update cross-references) that Sub 5 mechanically applied to a single source section.
- The implementation contract pinned every axis (Language; Package scoping; cross-ref repair targets enumerated; backward-compat preservation explicit; cdr untouched; no schemas / runtime / cdd-verify changes; CDD.md kernel byte-identical; INDEX.md content unchanged).
- The boundary decision (per-finding shape + INDEX row format + cadence rule + disposition vocabulary preserved verbatim) was named in cnos#419 issue body AC11 as a hard constraint; α's verbatim diff against the pre-migration source confirms the preservation.
- The source section was the most cohesive single section in the cnos#404 wave (one canonical home; one migration target; no synthesis required); Sub 5's diff surface is the smallest among the four migration subs.

## Cross-repo trace

None. No findings with `patch-landed` + `Cross-repo` disposition. Note: this cycle *moved* the canonical home for the receipt-stream wire-format + INDEX.md aggregator doctrine, but did not itself perform any cross-repo coordination.

## Aggregator update

Appended to `.cdd/iterations/INDEX.md`: row for cycle 419 with `Findings = 0; Patches = 0; MCAs = 0; No-patch = 0`. The row is appended per the canonical procedure now resident at [`cnos.handoff/skills/handoff/receipt-stream/SKILL.md §2`](../../../src/packages/cnos.handoff/skills/handoff/receipt-stream/SKILL.md) (eight pipe-separated columns; `Findings = Patches + MCAs + No-patch` consistency check; `Path:` column uses the `.cdd/unreleased/{N}/cdd-iteration.md` form during the cycle, to be migrated to `.cdd/releases/docs/{ISO-date}/{N}/` at release if/when a docs-release ships).
