phase29ap(p7): remove pattern9 legacy routing

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

@@ -3,7 +3,7 @@
 ## Current Focus
 
 - Phase: `docs/development/current/main/phases/phase-29ap/README.md`
-- Next: Phase 29ap P7 (planned; see `docs/development/current/main/phases/phase-29ap/README.md`)
+- Next: Phase 29ap P8 (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: `docs/development/current/main/phases/phase-29ap/README.md` (Next: P7 planned)
+- Phase 29ap: `docs/development/current/main/phases/phase-29ap/README.md` (Next: P8 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

@@ -34,7 +34,7 @@ Related:
 ## 1.1 Current (active)
 
 - Active phase: `docs/development/current/main/phases/phase-29ap/README.md`
-- Next step: Phase 29ap P7 (planned)
+- Next step: Phase 29ap P8 (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

@@ -83,5 +83,14 @@ Gate (SSOT):
 
 ## Next (planned)
 
-- P7: Pattern9 legacy table removal decision
-  - `docs/development/current/main/phases/phase-29ap/P7-PATTERN9-LEGACY-REMOVAL-DECISION-INSTRUCTIONS.md`
+## P7: Pattern9 legacy table removal ✅
+
+- Scope:
+  - Pattern9 is not referenced by stdlib/quick/gate; only legacy pack SKIP remains.
+  - Removed Pattern9 from JoinIR legacy table (plan/composer remains SSOT).
+- Guardrails:
+  - No change to logs or error strings.
+
+## Next (planned)
+
+- P8: Follow-up legacy table shrink or leave as-is with justification