ГЛОБАЛЬНЫЙ РЕФАКТОРИНГ АРХИТЕКТУРЫ - Stage 4.7: внедрить stage4_contract_compliance_rate в P0 quality-gap и baseline gate

docs/TECH/1CLLMARCH-FACT.md

@@ -2728,7 +2728,25 @@ Implemented in current pass (Stage 4.6 eval metric for answer-contract complianc
    - `assistantEvalHarness.test.ts`: `6 passed` (run with extended timeout budget);
    - `npm --prefix llm_normalizer/backend run build` passed.
 
-Status: In progress (Stage 4.1-4.6 completed; continue with focused wave/manual-comment quality backlog)
+Implemented in current pass (Stage 4.7 Stage4 compliance rollout into P0 quality-gap loop, 2026-04-12):
+1. Extended P0 quality-gap metric contract:
+   - added `stage4_contract_compliance_rate` to `P0QualityGapMetricVector`;
+   - added metric definition in `P0_QUALITY_GAP_METRIC_DEFINITIONS`.
+2. Extended P0 quality-gap thresholds and baseline gate checks:
+   - added `stage4_contract_compliance_rate_min` to `P0QualityGapThresholds`;
+   - default threshold set to `0.9`;
+   - `buildQualityGapChecks(...)` now includes Stage4 compliance check.
+3. Integrated Stage4 compliance metric computation in P0 eval runner:
+   - source: `buildStage4AnswerContractAuditV1(assistant_reply).is_stage4_shape`;
+   - included in `quality_gap_metrics.raw`;
+   - added denominator `stage4_contract_audited_cases_total`.
+4. Regression updates:
+   - `assistantP0EvalHarness.test.ts` updated for new quality-gap metric key.
+5. Validation snapshot:
+   - `assistantP0EvalHarness.test.ts`: `5 passed` (extended timeout budget);
+   - `npm --prefix llm_normalizer/backend run build` passed.
+
+Status: In progress (Stage 4.1-4.7 completed; continue with focused wave/manual-comment quality backlog)
 
 ## Stage 5 (P3): Quality Loop Driven By GUI Markup