phase29ap(p0): reduce legacy extractors (pattern1/3)

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

@@ -2,8 +2,8 @@
 
 ## Current Focus
 
-- Phase: `docs/development/current/main/phases/phase-29ao/README.md` (closeout)
-- Next: Phase 29ap (planned; see `docs/development/current/main/phases/phase-29ao/README.md`)
+- Phase: `docs/development/current/main/phases/phase-29ap/README.md`
+- Next: Phase 29ap P1 (planned; see `docs/development/current/main/phases/phase-29ap/README.md`)
 
 ## Gate (SSOT)
 

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

@@ -5,7 +5,7 @@ Scope: 「次にやる候補」を短く列挙するメモ。入口は `docs/dev
 
 ## Active
 
-- Phase 29ap (planned): legacy削減の段階計画（extractor/router）+ composer SSOT
+- Phase 29ap: `docs/development/current/main/phases/phase-29ap/README.md` (Next: P1 planned)
 - JoinIR regression gate SSOT: `docs/development/current/main/phases/phase-29ae/README.md`
 - CorePlan hardening (docs-first): `docs/development/current/main/phases/phase-29al/README.md`
 

docs/development/current/main/design/coreplan-migration-roadmap-ssot.md

@@ -33,8 +33,8 @@ Related:
 
 ## 1.1 Current (active)
 
-- Active phase: `docs/development/current/main/phases/phase-29ao/README.md`
-- Next step: Phase 29ap (planned; P55 done)
+- Active phase: `docs/development/current/main/phases/phase-29ap/README.md`
+- Next step: Phase 29ap P1 (planned)
 
 ## 2. すでに固めた SSOT（再発防止の土台）
 

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

@@ -0,0 +1,32 @@
+---
+Status: Active
+Scope: Legacy extractor reduction (planner+composer SSOT)
+Related:
+- docs/development/current/main/design/coreplan-migration-roadmap-ssot.md
+- docs/development/current/main/design/coreplan-migration-done-criteria-ssot.md
+- docs/development/current/main/design/coreloop-composer-v0-v1-boundary-ssot.md
+- docs/development/current/main/phases/phase-29ae/README.md
+---
+
+# Phase 29ap: Legacy extractor reduction (Step-E)
+
+Goal: Reduce legacy extractor fallbacks while keeping planner+composer as the SSOT path.
+
+Gate (SSOT):
+- `./tools/smokes/v2/profiles/integration/joinir/phase29ae_regression_pack_vm.sh`
+
+## P0: Reduce legacy extractors (Pattern1/3) ✅
+
+- Scope:
+  - Remove Pattern1/3 extractor fallbacks in `single_planner`.
+  - Remove Pattern3 JoinIR router entry so plan line is the only path.
+  - Pattern1 JoinIR entry is retained for now (stdlib loops still rely on it).
+- Guardrails:
+  - Outcome remains `Ok(None)` for non-matching cases.
+  - No new logs or error strings.
+
+## Next (planned)
+
+- P1: Pattern6/7 JoinIR wrapper → composer entry only
+- P2: Router pattern-name branching reduction (planner outcome + composer SSOT)
+- P3: Facts/Feature expansion if needed