diff --git a/src/agentkit/core/plan_exec_engine.py b/src/agentkit/core/plan_exec_engine.py
index 9382ed0..cd64d47 100644
--- a/src/agentkit/core/plan_exec_engine.py
+++ b/src/agentkit/core/plan_exec_engine.py
@@ -189,6 +189,10 @@ class PlanExecEngine:
         cancellation_token: CancellationToken | None = None,
         timeout_seconds: float | None = None,
         confirmation_handler: Any | None = None,
+        # U7/R12: accepted for ReActEngine interface compatibility.
+        # PlanExecEngine does its own pitfall injection at planning phase
+        # via _inject_pitfall_warnings, so this param is intentionally unused.
+        pitfall_warnings: Any | None = None,
     ) -> ReActResult:
         """执行 Plan-and-Execute 流程
 
@@ -261,6 +265,10 @@ class PlanExecEngine:
         cancellation_token: CancellationToken | None = None,
         timeout_seconds: float | None = None,
         confirmation_handler: Any | None = None,
+        # U7/R12: accepted for ReActEngine interface compatibility.
+        # PlanExecEngine does its own pitfall injection at planning phase
+        # via _inject_pitfall_warnings, so this param is intentionally unused.
+        pitfall_warnings: Any | None = None,
     ):
         """执行 Plan-and-Execute 流程，逐步 yield ReActEvent