diff --git a/agent-office/app/main.py b/agent-office/app/main.py
index ef70bc1..fbb60df 100644
--- a/agent-office/app/main.py
+++ b/agent-office/app/main.py
@@ -111,7 +111,9 @@ def agent_tasks(
     task_type: Optional[str] = None,
     days: Optional[int] = None,
 ):
-    return {"items": get_agent_tasks(agent_id, limit=limit, task_type=task_type, days=days)}
+    tasks_list = get_agent_tasks(agent_id, limit=limit, task_type=task_type, days=days)
+    # Backward compat: 기존 client는 'tasks', 신규 client는 'items' 사용
+    return {"tasks": tasks_list, "items": tasks_list}
 
 @app.get("/api/agent-office/agents/{agent_id}/logs")
 def agent_logs(agent_id: str, limit: int = 50):