# cdd-iteration — Cycle 421 (courtesy empty-findings stub)

**Cycle:** [cnos#421](https://github.com/usurobor/cnos/issues/421) — Track A1 of [cnos#405](https://github.com/usurobor/cnos/issues/405)
**Date:** 2026-05-23
**Mode:** explore / design (survey + decision)
**Authority:** `cnos.handoff/skills/handoff/receipt-stream/SKILL.md` (canonical home of cdd-iteration shape; per-finding shape; cadence rule; INDEX row format).

## §0 Findings

`protocol_gap_count: 0`. No binding findings; no MCAs; no patches; no no-patch dispositions. Cycle closes cleanly.

## §1 Trigger assessment (per ε §1 / receipt-stream cadence rules)

- **Review churn:** R1 APPROVED on first pass; no fix rounds. **No trigger fired.**
- **Mechanical overload:** explore/design cycle; mechanical ratio not applicable. **No trigger fired.**
- **Avoidable tooling / environment failure:** none. The prior-cycle stall risk (cycle/420 β→γ transition; flagged in the dispatch brief) did not recur — γ scaffold filed, α work landed in one commit, β review + closeouts batched into a third commit, push clean. **No trigger fired.**
- **Loaded skill failed to prevent a finding:** no findings surfaced; nothing to attribute. **No trigger fired.**

## §2 Trigger conclusion

Per cycle/401's courtesy convention (canonical at `cnos.handoff/skills/handoff/receipt-stream/SKILL.md`), this stub is the receipt-stream entry for cycle 421 — confirming that no protocol gaps surfaced during the Track A1 survey-and-pin cycle. The cycle exercised the dispatch surface from `cnos.handoff/skills/handoff/dispatch/SKILL.md` (operator-as-γ → α/β/γ collapsed on δ); the implementation contract held; no `gamma-clarification.md` triggered; the artifact channel discipline (per-role write ownership, sequential α→β→γ) held.

## §3 Wave context

This cycle is the **first sub** of the cnos#405 roadmap (CCNF-O orchestration grammar + TSC coherence steering). The cycle's role is to pin the five decisions Tracks A2–A6 + B1 dispatch against. With this cycle closed, the gates open for Track A2 (type dispatch-prompt + implementation-contract schemas) and Track B1 (TSC report attachment design) — both may dispatch immediately. The remaining Tracks chain off A2 + B1 per the per-Track gates in §6 of the survey doc.

The post-#404 / #405 wave continues. The wave-execution pattern from cycles/415–420 (file tracker; file subs sequentially or in parallel; dispatch via worktree-isolated agents; merge each with Closes keyword) holds.

## INDEX update

Adds the following row to `.cdd/iterations/INDEX.md`:

```
| 421 | #421 | 2026-05-23 | 0 | 0 | 0 | 0 | .cdd/unreleased/421/cdd-iteration.md |
```

Filed by γ on 2026-05-23.
