# cdd-iteration — Cycle 420 (courtesy empty-findings stub)

**Cycle:** [cnos#420](https://github.com/usurobor/cnos/issues/420) — Sub 6 of [cnos#404](https://github.com/usurobor/cnos/issues/404)
**Date:** 2026-05-22
**Mode:** docs-only / cleanup
**Authority:** cnos.handoff/skills/handoff/receipt-stream/SKILL.md (per Sub 5; canonical home of cdd-iteration shape)

## §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 trigger fired.**
- Mechanical overload: docs-only cycle; mechanical ratio not applicable. **No trigger fired.**
- Avoidable tooling / environment failure: an agent-stall recovery happened at the β→γ transition; γ@cnos finalized the cycle from the agent's preserved α/β artifacts. Recorded as informational in `gamma-closeout.md`. The stall is operational-substrate (agent runtime), not protocol-substrate, so no protocol-gap finding fires per ε §1's classification rules. **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 (and now canonical at `cnos.handoff/skills/handoff/receipt-stream/SKILL.md`), this stub is the receipt-stream entry for cycle 420 — confirming that no protocol gaps surfaced during the cnos#404 handoff extraction wave's closure cycle.

## §3 Wave context

This cycle closes the **6-sub cnos#404 handoff extraction wave**: skeleton (#415) + 5 surface extractions (#416 cross-repo / #417 dispatch / #418 mid-flight + artifact-channel / #419 receipt-stream) + cleanup (this cycle). All 6 subs ran clean (0 binding findings across the wave; protocol_gap_count: 0 on each). The wave-execution pattern itself — file tracker; file subs sequentially; dispatch via worktree-isolated agents; merge each with Closes keyword — held end-to-end.

## INDEX update

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

```
| 420 | #420 | 2026-05-22 | 0 | 0 | 0 | 0 | .cdd/unreleased/420/cdd-iteration.md |
```

Filed by γ on 2026-05-22.
