docs(phase29aj): isolate phase286 pattern9 legacy smoke

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

@@ -66,6 +66,13 @@ Goal: planner の facts/plan を 1 本の outcome に集約し、観測の SSOT
 - 完了: Pattern9 facts/planner/single_planner を接続
 - 検証: `cargo build --release` / `./tools/smokes/v2/run.sh --profile quick` / `./tools/smokes/v2/profiles/integration/joinir/phase29ae_regression_pack_vm.sh`
 
+## P9: phase286_pattern9 legacy isolation (docs/smokes)
+
+- 指示書: `docs/development/current/main/phases/phase-29aj/P9-ISOLATE-PHASE286-PATTERN9-LEGACY-INSTRUCTIONS.md`
+- ねらい: JoinIR 回帰の SSOT は phase29ae pack に固定し、phase286_pattern9_* は legacy pack (SKIP) に隔離
+- 完了: phase286_pattern9_legacy_pack を追加し、運用ルールを docs に固定
+- 検証: `./tools/smokes/v2/run.sh --profile quick` / `./tools/smokes/v2/profiles/integration/joinir/phase29ae_regression_pack_vm.sh` / `./tools/smokes/v2/profiles/integration/joinir/phase286_pattern9_legacy_pack.sh` (SKIP)
+
 ## Verification (SSOT)
 
 - `cargo build --release`