# AD-439 Build Report

**Date:** 2026-05-01
**Status:** Complete

## Files Changed

- `src/probos/cognitive/emergent_leadership.py` (new, 180 lines)
- `src/probos/ontology/service.py` (+4, public `get_agents_for_post` passthrough)
- `src/probos/events.py` (+1, LEADERSHIP_DIVERGENCE)
- `src/probos/config.py` (+10, EmergentLeadershipConfig)
- `src/probos/startup/finalize.py` (+14, wiring after AD-679 disclosure router)
- `src/probos/routers/emergent_leadership.py` (new, 38 lines)
- `src/probos/api.py` (+2, router registration)
- `tests/test_ad439_emergent_leadership.py` (new, 11 tests)
- `PROGRESS.md` (+2)
- `docs/development/roadmap.md` (status flip)

## Sections Implemented

- Section 0: LEADERSHIP_DIVERGENCE EventType ✓
- Section 1.5: get_agents_for_post passthrough on VesselOntologyService ✓
- Section 1: EmergentLeadershipDetector ✓
- Section 2: EventType added ✓
- Section 3: EmergentLeadershipConfig + SystemConfig wiring ✓
- Section 4: finalize.py wiring (with `runtime.ontology is not None` guard) ✓
- Section 5: REST endpoint at `/api/emergent-leadership` + api.py registration ✓

## Test Results

`pytest tests/test_ad439_emergent_leadership.py -v -n 0` → 11 passed in 0.69s.

Additional test (`test_endpoint_returns_report_when_enabled`) added beyond the 10-test plan to cover the happy-path endpoint flow.

## Engineering Principles Compliance

- ✓ Demeter: public `get_agents_for_post` passthrough; no `_dept` access from detector module
- ✓ Public attribute `runtime.emergent_leadership_detector` (no leading underscore)
- ✓ Type annotations on all public methods
- ✓ TYPE_CHECKING guard for circular-prevention imports
- ✓ Read-only on shared state (no Hebbian/ontology/trust mutations)
- ✓ emit-failure log-and-degrade pattern
