docs(phase29ab): record P6 pattern6 contract freeze

docs/development/current/main/10-Now.md

@@ -34,6 +34,13 @@
 - smoke: `tools/smokes/v2/profiles/integration/apps/phase29ab_pattern7_firstfail_min_vm.sh`
 - 検証: `./tools/smokes/v2/run.sh --profile integration --filter "phase29ab_pattern7_*"` PASS
 
+**2025-12-28: Phase 29ab P6 完了** ✅
+- 目的: Pattern6 ScanWithInit の near-miss（契約違反）を extractor 段で freeze に固定（SSOT化）
+- 実装: `src/mir/builder/control_flow/joinir/patterns/pattern6_scan_with_init.rs`（`[joinir/phase29ab/pattern6/contract]`）
+- fixture: `apps/tests/phase29ab_pattern6_firstfail_min.hako`
+- smoke: `tools/smokes/v2/profiles/integration/apps/phase29ab_pattern6_firstfail_min_vm.sh`
+- 検証: `./tools/smokes/v2/run.sh --profile integration --filter "phase29ab_pattern6_*"` PASS
+
 **2025-12-28: Phase 29aa P5 完了** ✅
 - 目的: Return block が複数 predecessor のとき、incoming state が完全一致する場合のみ ReturnCleanup を成立させる
 - 入口: `docs/development/current/main/phases/phase-29aa/README.md`

docs/development/current/main/30-Backlog.md

@@ -14,7 +14,8 @@ Related:
   - P3: PromoteDecision の “NotApplicable/Freeze” 境界を contract+smoke で固定（JoinIR-only前提）
   - P4: Phase 263（Stage‑B 実ログ seg）を Derived slot 方針で通し、fixture+smoke で固定
   - P5: Pattern7 SplitScan first-fail（契約違反）を freeze で固定して SSOT 化
-  - P6: Pattern6 MatchScan first-fail を同様に fixture+smoke で固定（freeze/NotApplicableの境界を決める）
+  - P6: Pattern6 ScanWithInit first-fail（契約違反）を freeze で固定して SSOT 化
+  - P7: Pattern6 reverse scan / MatchScan の near-miss を追加で freeze 固定（負債を先に顕在化）
 
 - **Phase 288（✅ P0–P3 + 288.1 complete）: REPL mode**
   - 入口: `docs/development/current/main/phases/phase-288/README.md`