# AD-447 Phase Gates for PoolGroup Build Report

**Date:** 2026-04-30
**Status:** Complete
**Prompt:** `prompts/ad-447-phase-gates-pool-group.md`
**Builder:** ProbOS Builder Agent

## Summary

Implemented phase-gate metadata and diagnostics for pool groups. `PoolGroup` now carries a `startup_phase`, `PoolGroupRegistry` exposes phase organization helpers, and existing fleet organization registrations declare the requested startup phase assignments.

No pool startup ordering, inter-phase health checks, phase gate events, scaler behavior, or `ResourcePool.start()` behavior was changed.

## Files Changed

- `src/probos/substrate/pool_group.py`
  - Added `PoolGroup.startup_phase` with default phase 1.
  - Added `groups_by_phase()`, `get_phase_pools()`, `max_phase()`, and `phase_summary()`.
- `src/probos/startup/fleet_organization.py`
  - Assigned phase 1 to `core` and `bridge`.
  - Assigned phase 2 to `security`, `engineering`, `operations`, and `medical`.
  - Assigned phase 3 to `science` and `self_mod`.
  - Assigned phase 4 to `utility`.
- `tests/test_ad447_phase_gates_pool_group.py`
  - Added 8 focused AD-447 tests.
- `PROGRESS.md`, `docs/development/roadmap.md`
  - Updated AD-447 tracking.

## Section Audit

- `### Section 1: Add startup_phase to PoolGroup` — implemented in `src/probos/substrate/pool_group.py`.
- `### Section 2: Add phase gate methods to PoolGroupRegistry` — implemented in `src/probos/substrate/pool_group.py`.
- `### Section 3: Assign phases to existing pool groups` — implemented in `src/probos/startup/fleet_organization.py`.
- `## Tests` — implemented all 8 requested tests in `tests/test_ad447_phase_gates_pool_group.py`.
- `## Tracking` — updated `PROGRESS.md`, `docs/development/roadmap.md`, and this build report.

## Tests

- `d:/ProbOS/.venv/Scripts/pytest.exe tests/test_ad447_phase_gates_pool_group.py -v -n 0`
  - Result: 8 passed.
- `d:/ProbOS/.venv/Scripts/pytest.exe tests/test_pool_groups.py tests/test_ad447_phase_gates_pool_group.py -v -n 0`
  - Result: 21 passed, 1 warning.
- `d:/ProbOS/.venv/Scripts/pytest.exe tests/ -q -n 4 --dist=loadfile`
  - Result: 10063 passed, 16 skipped, 118 warnings.

## Notes

- The full gate used the sweep execution-plan command (`-n 4 --dist=loadfile`) instead of the prompt's older `-n auto` acceptance line.
- Runtime warnings from existing `startup/finalize.py` MagicMock async wiring appeared during the full gate, but the run passed.
