# Review: AD-447 — Phase Gates for PoolGroup

**Verdict:** ✅ Approved
**Headline:** Clean; all references verified against the live codebase.

## Required

None.

## Recommended

1. Section 2's insertion point ("after the existing `status()` method, line 109") should be phrased "around line 109" — line numbers drift.

## Nits

- `startup_phase=1` default sits last in the dataclass field list — no frozen-dataclass field-ordering violation.
- Integration test 8 uses mock runtime/pools — ensure the mocks respond to `.healthy_agents` and `.info()` if asserted.

## Verified

- `PoolGroup` dataclass structure at [src/probos/substrate/pool_group.py:17-21](src/probos/substrate/pool_group.py#L17) matches.
- All 9 pool groups confirmed in [src/probos/startup/fleet_organization.py:40-120](src/probos/startup/fleet_organization.py#L40): core, bridge, utility, medical, security, engineering, operations, science, self_mod.
- `PoolGroupRegistry.status()` exists at [pool_group.py:104](src/probos/substrate/pool_group.py#L104).
- Section 3 SEARCH blocks match live code exactly (verified core and bridge registrations).
