phase29aj(p3): planner-first pattern3 if-phi facts subset

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

@@ -2,7 +2,12 @@
 
 ## Current Focus: Phase 29aj（PlannerOutcome SSOT）
 
-Next: Phase 29aj P3（TBD: promotion hint を JoinIR 側の orchestrator へ配線、挙動不変）
+Next: Phase 29aj P4（TBD: promotion hint を JoinIR 側の orchestrator へ配線、挙動不変）
+
+**2025-12-29: Phase 29aj P3 完了** ✅
+- 目的: Pattern3（If-Phi）を Facts→Planner-first に移行（仕様不変）
+- 実装: `src/mir/builder/control_flow/plan/facts/pattern3_ifphi_facts.rs` / `src/mir/builder/control_flow/plan/planner/build.rs` / `src/mir/builder/control_flow/plan/single_planner/rules.rs`
+- 検証: `cargo build --release` / `./tools/smokes/v2/run.sh --profile quick` / `./tools/smokes/v2/profiles/integration/joinir/phase29ae_regression_pack_vm.sh` PASS
 
 **2025-12-29: Phase 29aj P2 完了** ✅
 - 目的: chosen_rule を撤去し、Pattern1 を Facts→Planner-first に移行（仕様不変）

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

@@ -19,8 +19,8 @@ Related:
 
 - **Phase 29aj（candidate）: PlannerOutcome observability SSOT**
   - 入口: `docs/development/current/main/phases/phase-29aj/README.md`
-  - 状況: P0/P1/P2 ✅ 完了
-  - Next: Phase 29aj P3（TBD: promotion hint を JoinIR 側の orchestrator へ配線、挙動不変）
+  - 状況: P0/P1/P2/P3 ✅ 完了
+  - Next: Phase 29aj P4（TBD: promotion hint を JoinIR 側の orchestrator へ配線、挙動不変）
 
 - **Phase 29ai（candidate）: Plan/Frag single-planner（Facts SSOT）**
   - 入口: `docs/development/current/main/phases/phase-29ai/README.md`

docs/development/current/main/phases/phase-29aj/P3-PATTERN3-IFPHI-PLANNER-FIRST-INSTRUCTIONS.md

@@ -0,0 +1,87 @@
+# Phase 29aj P3: Pattern3 (If-Phi) planner-first via Facts (subset)
+
+Date: 2025-12-29  
+Status: Ready for execution  
+Scope: Pattern3 facts → planner candidate → single_planner planner-first（仕様不変）  
+Goal: Pattern3 を Facts→Planner に乗せ、extractor 依存を 1 本減らす
+
+## Objective
+
+- Pattern3（Loop with If-Else PHI）を Facts→Planner 経路に追加
+- single_planner は Pattern3 の型一致時のみ planner-first 採用
+- 既定挙動・観測・エラー文字列は不変
+
+## Non-goals
+
+- Pattern4/5/8/9 の planner-first 化
+- ルール順序 SSOT の CandidateSet 移管
+- Freeze/Fail-Fast の新規導入
+
+## Implementation Steps
+
+### Step 1: Facts SSOT 追加（Pattern3）
+
+Files:
+- `src/mir/builder/control_flow/plan/facts/pattern3_ifphi_facts.rs` (new)
+
+Facts:
+- `Pattern3IfPhiFacts { loop_var, carrier_var, condition, if_condition, then_update, else_update, loop_increment }`
+
+Extraction rules (Ok(None) fallback only):
+- condition は比較演算（left が Variable）
+- if-else が存在し、then/else 両方で同一変数に代入
+- return / break / continue / nested-if は Ok(None)
+- loop_increment は `extract_loop_increment_plan` で取れるときのみ
+
+### Step 2: LoopFacts に接続
+
+Files:
+- `src/mir/builder/control_flow/plan/facts/mod.rs`
+- `src/mir/builder/control_flow/plan/facts/loop_facts.rs`
+
+Changes:
+- LoopFacts に `pattern3_ifphi` を追加
+- `try_build_loop_facts()` に抽出を追加
+- all-none 判定に `pattern3_ifphi` を含める
+
+### Step 3: Planner candidate 追加
+
+File:
+- `src/mir/builder/control_flow/plan/planner/build.rs`
+
+Changes:
+- facts が Some のとき `DomainPlan::Pattern3IfPhi` を候補に追加
+- rule 名は `loop/pattern3_ifphi`
+- unit test 追加
+
+### Step 4: single_planner を Pattern3 planner-first に
+
+File:
+- `src/mir/builder/control_flow/plan/single_planner/rules.rs`
+
+Changes:
+- RuleKind::Pattern3 を追加
+- planner_opt が `Pattern3IfPhi` のとき採用
+- それ以外は extractor へフォールバック
+
+### Step 5: docs / CURRENT_TASK 更新
+
+Files:
+- `docs/development/current/main/phases/phase-29aj/README.md`
+- `docs/development/current/main/10-Now.md`
+- `docs/development/current/main/30-Backlog.md`
+- `CURRENT_TASK.md`
+
+## Acceptance Criteria
+
+- `cargo build --release`
+- `./tools/smokes/v2/run.sh --profile quick`
+- `./tools/smokes/v2/profiles/integration/joinir/phase29ae_regression_pack_vm.sh`
+
+## Commit
+
+- `git add -A && git commit -m "phase29aj(p3): planner-first pattern3 if-phi facts subset"`
+
+## Next (P4 candidate)
+
+- Pattern4（Continue）を Facts→Planner-first に寄せる（subset）

docs/development/current/main/phases/phase-29aj/README.md

@@ -23,6 +23,13 @@ Goal: planner の facts/plan を 1 本の outcome に集約し、観測の SSOT
 - 完了: chosen_rule を削除し、Pattern1 facts→planner を single_planner に接続
 - 検証: `cargo build --release` / `./tools/smokes/v2/run.sh --profile quick` / `./tools/smokes/v2/profiles/integration/joinir/phase29ae_regression_pack_vm.sh`
 
+## P3: Pattern3 (If-Phi) planner-first（subset）
+
+- 指示書: `docs/development/current/main/phases/phase-29aj/P3-PATTERN3-IFPHI-PLANNER-FIRST-INSTRUCTIONS.md`
+- ねらい: Pattern3 を Facts→Planner-first に接続し、extractor 依存を削減
+- 完了: Pattern3 facts/planner/single_planner を接続
+- 検証: `cargo build --release` / `./tools/smokes/v2/run.sh --profile quick` / `./tools/smokes/v2/profiles/integration/joinir/phase29ae_regression_pack_vm.sh`
+
 ## Verification (SSOT)
 
 - `cargo build --release`