phase29ak(p4): remove pattern1 guard from single_planner

CURRENT_TASK.md

@@ -36,6 +36,9 @@ static box では Pattern8 facts 抽出を抑制。single_planner 側の filter
 **2025-12-29: Phase 29ak P3 COMPLETE (remove Pattern8 filter in single_planner)**
 Pattern8 static box filter を single_planner から撤去し、planner/facts 側 SSOT に一本化。
 
+**2025-12-29: Phase 29ak P4 COMPLETE (remove Pattern1 guard in single_planner)**
+Pattern1 guard を single_planner から撤去し、planner/facts 側 SSOT と fallback 抑制に統一。
+
 **2025-12-29: Phase 29aj P10 COMPLETE (single_planner unified shape)**
 single_planner を全パターンで planner-first → extractor フォールバックの共通形に統一（挙動不変）。
 

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

@@ -2,10 +2,15 @@
 
 ## Current Focus: Phase 29ak（PlanRuleOrder + PlannerContext）
 
-Next: Phase 29ak P4（TBD）
+Next: Phase 29ak P5（TBD）
 運用ルール: integration filter で phase143_* は回さない（JoinIR 回帰は phase29ae pack のみ）
 運用ルール: phase286_pattern9_* は legacy pack (SKIP) を使う
 
+**2025-12-29: Phase 29ak P4 完了** ✅
+- 目的: Pattern1 guard を single_planner から撤去（仕様不変）
+- 実装: `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 29ak P3 完了** ✅
 - 目的: Pattern8 static box filter を single_planner から撤去（仕様不変）
 - 実装: `src/mir/builder/control_flow/plan/single_planner/rules.rs`

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

@@ -26,8 +26,8 @@ Related:
 
 - **Phase 29ak（candidate）: PlanRuleOrder SSOT + PlannerContext plumbing**
   - 入口: `docs/development/current/main/phases/phase-29ak/README.md`
-  - 状況: P0/P1/P2/P3 ✅ 完了
-  - Next: Phase 29ak P4（TBD）
+  - 状況: P0/P1/P2/P3/P4 ✅ 完了
+  - Next: Phase 29ak P5（TBD）
 
 - **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-29ak/P4-REMOVE-SINGLE_PLANNER-PATTERN1-GUARD-INSTRUCTIONS.md

@@ -0,0 +1,51 @@
+# Phase 29ak P4: Remove Pattern1 guard from single_planner
+
+Date: 2025-12-29  
+Status: Ready for execution  
+Scope: single_planner の特例削除（仕様不変）＋ docs 更新  
+Goal: Pattern1 guard を planner/facts 側 SSOT に一本化する
+
+## Objective
+
+- single_planner の Pattern1 guard を削除
+- fallback 側で ctx による抑制を追加し、契約を二重化
+- 観測差分なし（ログ文字列は変えない）
+
+## Non-goals
+
+- rule順序SSOTの CandidateSet 移管
+- extractor fallback の削除
+- 新 env var / 新ログ追加
+
+## Implementation Steps
+
+### Step 1: Pattern1 guard を削除
+
+Update:
+- `src/mir/builder/control_flow/plan/single_planner/rules.rs`
+
+### Step 2: fallback 側で Pattern1 抑制
+
+Update:
+- `src/mir/builder/control_flow/plan/single_planner/rules.rs`
+
+Notes:
+- `ctx.pattern_kind != Pattern1SimpleWhile` のとき Pattern1 fallback を `Ok(None)` にする
+
+### Step 3: docs / CURRENT_TASK 更新
+
+Update:
+- `docs/development/current/main/phases/phase-29ak/README.md`
+- `docs/development/current/main/10-Now.md`
+- `docs/development/current/main/30-Backlog.md`
+- `CURRENT_TASK.md`
+
+## Verification
+
+- `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 "phase29ak(p4): remove pattern1 guard from single_planner"`

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

@@ -29,3 +29,10 @@ Goal: single_planner の「順序・名前・ガード」の SSOT を 1 箇所
 - ねらい: Pattern8 static box filter を planner/facts 側 SSOT に一本化
 - 完了: single_planner の Pattern8 特例フィルタを削除（debugログは SSOT ではない）
 - 検証: `cargo build --release` / `./tools/smokes/v2/run.sh --profile quick` / `./tools/smokes/v2/profiles/integration/joinir/phase29ae_regression_pack_vm.sh`
+
+## P4: single_planner から Pattern1 guard を撤去
+
+- 指示書: `docs/development/current/main/phases/phase-29ak/P4-REMOVE-SINGLE_PLANNER-PATTERN1-GUARD-INSTRUCTIONS.md`
+- ねらい: Pattern1 guard を planner/facts 側 SSOT に一本化
+- 完了: single_planner の guard を削除し、fallback 側で同契約を維持
+- 検証: `cargo build --release` / `./tools/smokes/v2/run.sh --profile quick` / `./tools/smokes/v2/profiles/integration/joinir/phase29ae_regression_pack_vm.sh`

src/mir/builder/control_flow/plan/single_planner/rules.rs

@@ -32,22 +32,23 @@ pub(super) fn try_build_domain_plan(ctx: &LoopPatternContext) -> Result<Option<D
     for rule_id in PLAN_RULE_ORDER {
         let rule_id = *rule_id;
         let name = rule_name(rule_id);
-        // Phase 286 P2.6: Pattern1 Plan guard (structural Fail-Fast)
-        // Phase 29ak P1: planner also suppresses Pattern1 facts; keep this guard as safety.
-        // Pattern1 should only match Pattern1SimpleWhile pattern_kind
-        // This prevents Pattern1 from incorrectly matching Pattern3 fixtures
-        if matches!(rule_id, PlanRuleId::Pattern1)
-            && ctx.pattern_kind != LoopPatternKind::Pattern1SimpleWhile
-        {
-            continue;
-        }
-
         let planner_hit = try_take_planner(&planner_opt, rule_id);
+        // Pattern1 gating is handled by planner/facts; fallback mirrors the same contract.
+        let allow_pattern1 = match ctx.pattern_kind {
+            LoopPatternKind::Pattern1SimpleWhile => true,
+            _ => false,
+        };
         let allow_pattern8 = !ctx.in_static_box;
         let (plan_opt, log_none) = if planner_hit.is_some() {
             (planner_hit, false)
         } else {
-            (fallback_extract(ctx, rule_id, allow_pattern8)?, true)
+            let plan_opt = fallback_extract(ctx, rule_id, allow_pattern1, allow_pattern8)?;
+            let log_none = if matches!(rule_id, PlanRuleId::Pattern1) {
+                allow_pattern1
+            } else {
+                true
+            };
+            (plan_opt, log_none)
         };
 
         let promotion_tag = if matches!(rule_id, PlanRuleId::Pattern2)
@@ -102,10 +103,16 @@ fn try_take_planner(planner_opt: &Option<DomainPlan>, kind: PlanRuleId) -> Optio
 fn fallback_extract(
     ctx: &LoopPatternContext,
     kind: PlanRuleId,
+    allow_pattern1: bool,
     allow_pattern8: bool,
 ) -> Result<Option<DomainPlan>, String> {
     match kind {
-        PlanRuleId::Pattern1 => extractors::pattern1::extract_pattern1_plan(ctx.condition, ctx.body),
+        PlanRuleId::Pattern1 => {
+            if !allow_pattern1 {
+                return Ok(None);
+            }
+            extractors::pattern1::extract_pattern1_plan(ctx.condition, ctx.body)
+        }
         PlanRuleId::Pattern2 => {
             extractors::pattern2_break::extract_pattern2_plan(ctx.condition, ctx.body)
         }