docs(edgecfg): define bridge-pattern removal criteria (Phase 271)

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

@@ -1,5 +1,10 @@
 # Self Current Task — Now (main)
 
+## Next: Phase 271（docs-only）— Bridge pattern 撤去条件SSOT
+
+- 目的: bridge pattern（例: `Pattern9_AccumConstLoop`）を「汎用化せず、吸収して消す」ための撤去条件を SSOT 化
+- 変更: `docs/development/current/main/design/edgecfg-fragments.md` と `docs/development/current/main/30-Backlog.md` のみ
+
 ## 2025-12-21：Phase 270（P0+P1）— JoinIR-only minimal loop SSOT ✅
 
 - 目的: `loop(i < 3)` + `sum=sum+i` + `i=i+1` を JoinIR 経路で通すことを fixture/smoke で固定