docs: Phase 118 DONE (loop+if merge parity)

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

@@ -1,5 +1,18 @@
 # Self Current Task — Now (main)
 
+## 2025-12-18：Phase 118 完了 ✅
+
+**Phase 118: loop + if-only merge parity**
+- loop + if-only で条件付き変数更新 merge を VM/LLVM で固定
+- Fixture: phase118_loop_nested_if_merge_min.hako (expected: 2)
+- Pattern3 (if-sum) 活用
+- Smoke: VM + LLVM EXE parity 検証済み
+- Follow-up: Pattern3 carrier PHI contract（expected: 12）
+  - Fixture: phase118_pattern3_if_sum_min.hako
+  - Smoke: phase118_pattern3_if_sum_{vm,llvm_exe}.sh
+- 回帰: Phase 117 維持確認
+- 入口: `docs/development/current/main/phases/phase-118/README.md`
+
 ## 2025-12-18：Phase 117 完了 ✅
 
 **Phase 117: if-only nested-if + call merge parity**