# AD-641d Build Report — Crew Deliberation Protocol

**Wave:** 9C (single-prompt; closes AD-641 umbrella)
**Date:** 2026-05-02
**Risk:** HIGH
**Verdict:** ✅ Shipped

---

## Summary

AD-641d shipped the v1 Crew Deliberation Protocol — a Captain-resolved
judgment-level decision surface, distinct from `QuorumEngine`'s mechanical
consensus. v1 ships 3 of 8 capabilities; 5 wholesale-deferred to grandchildren
(AD-641d-i through AD-641d-v).

This commit closes the AD-641 umbrella (issue #277). Sister sub-ADs already
shipped in Wave 9A/9B: 641a (Observability Bridge), 641b (Ward Room Hebbian
Router), 641c (Thread Priority Service), 641e (LearnedShortcut Registry),
641f (Engineering Sensor Service).

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## Sections Implemented

| Section | Description | Status |
|---------|-------------|--------|
| 0 | EventTypes (DELIBERATION_INITIATED / DELIBERATION_ARGUMENT_SUBMITTED / DELIBERATION_RESOLVED) | ✅ |
| 1 | Package init (`src/probos/cognitive/deliberation/__init__.py`) | ✅ |
| 2 | `DeliberationProtocol` + dataclasses (`protocol.py`) | ✅ |
| 3 | `DeliberationConfig` + `SystemConfig` field | ✅ |
| 4 | Startup wiring in `finalize.py` | ✅ |
| 5 | Tests (`tests/test_ad641d_deliberation.py`) | ✅ |

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## Test Results

| Gate | Result |
|------|--------|
| Focused (`tests/test_ad641d_deliberation.py -n 0`) | 15/15 passed |
| Sibling-suite (`test_quorum.py + test_ward_room.py`) | 119/119 passed |
| Full parallel gate (`-n 8 --dist=loadfile`) | **10648 passed, 15 skipped** |
| Delta vs baseline (10633) | **+15** |

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## v1 Isolation Verified

- No direct calls into Wave 9A/9B artifacts (no references to
  `runtime.observability_bridge`, `runtime.ward_room_hebbian_router`,
  `runtime.thread_priority_service`, `runtime.engineering_sensor_service`,
  `runtime.learned_shortcut_registry`).
- Only Ward Room and emit_event are consumed (constructor-injected
  dependencies).

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## Confirmations Required by Dispatch

- **AD-641d-v (`endorse`) NOT built.** ✅ No `endorse()` method on
  `DeliberationProtocol`. `WardRoomService.endorse` is not called from
  AD-641d code. Deferred per pass-1 R3 review finding.
- **AD-641 umbrella roadmap row flipped to Closed.** ✅
  `docs/development/roadmap.md:7056` updated from "*partial — 641a/641b/641c/
  641e/641f complete*" → "*complete — all six sub-ADs shipped: 641a/641b/641c/
  641d/641e/641f*".
- **DELIBERATION_* EventTypes are collision-free.** ✅ Verified absent before
  the addition.
- **DeliberationPhase enum values trimmed.** ✅ Only `ARGUE` and `RESOLVED`
  ship (per pass-1 Recommended #1).
- **No `default_channel_id` field on DeliberationConfig.** ✅ Channel default
  is via `initiate(channel_id="deliberation")` parameter only.
- **Inline import at finalize.py wiring block.** ✅ `from
  probos.cognitive.deliberation import DeliberationProtocol` matches sibling
  pattern at lines 730/753/767/789/810.
- **All six exception arms use log-and-degrade.** ✅
  `logger.warning(..., exc_info=True)` per the three-tier model.

---

## Hard-Stops Triggered

**0.**

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## Files Changed

| Path | Type | Lines |
|------|------|-------|
| `src/probos/events.py` | modified | +3 |
| `src/probos/config.py` | modified | +7 |
| `src/probos/startup/finalize.py` | modified | +13 |
| `src/probos/cognitive/deliberation/__init__.py` | new | +15 |
| `src/probos/cognitive/deliberation/protocol.py` | new | +252 |
| `tests/test_ad641d_deliberation.py` | new | ~285 |
| `PROGRESS.md` | prepended | +1 entry |
| `DECISIONS.md` | inserted | AD-641d Era V entry |
| `docs/development/roadmap.md` | modified | umbrella status flipped |
| `prompts/build-reports/ad-641d-crew-deliberation-protocol-build.md` | new | this file |

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## Deferred Nits

**None.** All review findings (4 Required + 4 Recommended + 3 Nits) were
already folded into the prompt at revision a1ab2a3 and shipped in this commit.

---

## Closing Note

This commit lands the final architectural surface of the AD-641 umbrella.
GitHub issue #277 is ready to close on merge. A Wave 9 retrospective is
recommended per pass-2 README (first 4-sub-wave umbrella ship; first wave to
specify cross-wave v1 isolation as a hard-stop precondition).
