diff --git a/pipeline_service/agent_loop_v2.py b/pipeline_service/agent_loop_v2.py
index 22e4c98..c255a8d 100644
--- a/pipeline_service/agent_loop_v2.py
+++ b/pipeline_service/agent_loop_v2.py
@@ -773,6 +773,9 @@ class AgentExecutor:
             "workspace_dir": self.workspace_dir,
             "model_name": self.model_name,
             "config": self.config,
+            # 会话级隔离键（2026-09-05）：能力 handler 的会话态缓存（如 extract 规格锚定）
+            # 必须按 session_id 隔离，防跨会话串数据
+            "session_id": self.session_id,
         }
 
     def _build_slash_ctx(self) -> dict: