# AD-445 Decision Queue & Pause/Resume Build Report

**Date:** 2026-04-30
**Status:** Complete
**Prompt:** `prompts/ad-445-decision-queue.md`

## Summary

Implemented a prioritized in-memory `DecisionQueue` with explicit pause/resume controls, TTL expiration, resolution state tracking, and pause event emission. Startup finalization now wires the queue onto runtime, and system routes expose queue status plus pause/resume controls.

`InitiativeEngine` proposal storage and approval/rejection methods were not changed; future bridging remains out of scope as specified.

## Files Changed

- `src/probos/governance/decision_queue.py`
  - Added `DecisionState`, `QueuedDecision`, and `DecisionQueue`.
- `src/probos/events.py`
  - Added `EventType.DECISION_QUEUE_PAUSED`.
- `src/probos/startup/finalize.py`
  - Added finalize-time `DecisionQueue` initialization using `runtime.emit_event` directly.
- `src/probos/routers/system.py`
  - Added decision queue status, pause, and resume endpoints.
- `tests/test_ad445_decision_queue.py`
  - Added 15 focused tests for queue behavior, event emission, and API endpoints.
- `PROGRESS.md`, `docs/development/roadmap.md`
  - Updated AD-445 tracking.

## Sections Implemented

- `### Section 1: Create DecisionQueue`
  - Implemented in `src/probos/governance/decision_queue.py`; reused the existing `src/probos/governance/__init__.py` from AD-676.
- `### Section 2: Add DECISION_QUEUE_PAUSED event type`
  - Implemented in `src/probos/events.py` after `ACTION_RISK_DENIED`.
- `### Section 3: Wire DecisionQueue in startup`
  - Implemented in `src/probos/startup/finalize.py` near `InitiativeEngine` wiring with `emit_fn=runtime.emit_event`.
- `### Section 4: Add decision queue API endpoints`
  - Implemented in `src/probos/routers/system.py`.
- `## Tests`
  - Implemented in `tests/test_ad445_decision_queue.py`.
- `## Tracking`
  - Updated `PROGRESS.md`, `docs/development/roadmap.md`, and this build report.

## Post-Build Section Audit

- `### Section 1: Create DecisionQueue` — complete; queue, state enum, queued decision dataclass, priority ordering, TTL expiration, pause/resume, resolution, summary, and serialization APIs exist.
- `### Section 2: Add DECISION_QUEUE_PAUSED event type` — complete; event type exists in `EventType`.
- `### Section 3: Wire DecisionQueue in startup` — complete; finalization creates `runtime._decision_queue` and emits through the public `runtime.emit_event`.
- `### Section 4: Add decision queue API endpoints` — complete; status, pause, and resume endpoints are registered under the existing `/api` router prefix.
- `## Tests` — complete; 15 focused tests added.
- `## Tracking` — complete; tracker and build report updates added.

## Tests

- `d:/ProbOS/.venv/Scripts/pytest.exe tests/test_ad445_decision_queue.py -v -n 0`
  - Result: 15 passed.
- `d:/ProbOS/.venv/Scripts/pytest.exe tests/test_api_system.py tests/test_ad676_action_risk_tiers.py -v -n 0`
  - Result: 17 passed.
- `d:/ProbOS/.venv/Scripts/pytest.exe tests/ -q -n 4 --dist=loadfile`
  - Result: 10140 passed, 18 skipped.

## Deviations

- The prompt's route snippets included `/api/decision-queue` inside `system.py`. Because `system.py` already defines `router = APIRouter(prefix="/api", ...)`, the implemented decorators use `/decision-queue`, `/decision-queue/pause`, and `/decision-queue/resume` so the public endpoints match the prompt's intended `/api/...` paths without double-prefixing.
- The prompt's fallback instruction to create `src/probos/governance/__init__.py` was skipped because AD-676 already created it, matching the sweep instruction.
