phase29ao(p4): project exitmap presence into frag exits (unconnected)

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

@@ -2,7 +2,7 @@
 
 ## Current Focus: Phase 29ao（CorePlan composition）
 
-Next: Phase 29ao P4（ExitMap presence → Frag/ExitMap）
+Next: Phase 29ao P5（Cleanup presence → ExitKind）
 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
 移行道筋 SSOT: `docs/development/current/main/design/coreplan-migration-roadmap-ssot.md`
@@ -27,6 +27,11 @@ Next: Phase 29ao P4（ExitMap presence → Frag/ExitMap）
 - 変更: `src/mir/builder/control_flow/plan/normalizer/skeleton_loop.rs` / `src/mir/builder/control_flow/plan/normalizer/mod.rs` / `src/mir/builder/control_flow/plan/composer/mod.rs` / `docs/development/current/main/phases/phase-29ao/README.md` / `docs/development/current/main/10-Now.md` / `docs/development/current/main/30-Backlog.md` / `CURRENT_TASK.md`
 - 検証: `cargo build --release` / `./tools/smokes/v2/run.sh --profile quick` / `./tools/smokes/v2/profiles/integration/joinir/phase29ae_regression_pack_vm.sh`
 
+**2025-12-30: Phase 29ao P4 完了** ✅
+- 目的: `exit_kinds_present` を `Frag.exits` に投影（未配線のまま語彙のみ固定）
+- 変更: `src/mir/builder/control_flow/plan/normalizer/skeleton_loop.rs` / `src/mir/builder/control_flow/plan/composer/mod.rs` / `docs/development/current/main/phases/phase-29ao/README.md` / `docs/development/current/main/10-Now.md` / `docs/development/current/main/30-Backlog.md` / `CURRENT_TASK.md`
+- 検証: `cargo build --release` / `./tools/smokes/v2/run.sh --profile quick` / `./tools/smokes/v2/profiles/integration/joinir/phase29ae_regression_pack_vm.sh`
+
 **2025-12-29: Phase 29an P15 完了** ✅
 - 目的: P0–P14 の成果を closeout 形式でまとめ、次フェーズ（Phase 29ao）入口を固定
 - 変更: `docs/development/current/main/phases/phase-29an/README.md` / `docs/development/current/main/10-Now.md` / `docs/development/current/main/30-Backlog.md` / `CURRENT_TASK.md`