# Review: AD-609 Multi-Faceted Distillation (Re-review #2)

**Prompt:** prompts/ad-609-multi-faceted-distillation.md
**Reviewer:** Architect
**Date:** 2026-04-27 (third pass)
**Verdict:** ✅ Approved
**Previous Verdict:** ⚠️ Conditional

## Improvements Since Prior Review
- **Constructor contradiction RESOLVED.** No `else` branch.
- `confidence` formula `min(s, f) / max(s + f, 1)` saturates at 0.5 — author added an explicit inline Note justifying this as intentional ("perfectly balanced split represents maximum uncertainty"). Honest design choice.
- `is_negative=True` set on failure-pattern procedures.
- `comparative_enabled` config flag for opt-out.
- Description parts joined into readable sentences from structural signals.

## Required
None.

## Recommended
- Verify `Procedure` and `ProcedureStep` schemas accept all the fields used (`origin_cluster_id`, `origin_agent_ids`, `extraction_date`, `is_negative`, `steps`). Add an explicit Verify step.
- Verify `cluster.is_failure_dominant`, `is_success_dominant`, `intent_types`, `participating_agents`, `anchor_summary`, `variance` properties exist on `EpisodeCluster`. Several are used without confirmation.

## Nits
- The confidence-saturation note is good but the formula label "confidence" is misleading when its max is 0.5. Consider renaming to `balance_score` to match its semantics.

## Recommendation
Ship it.
