fix

server.py

@@ -41,6 +41,8 @@ class ResetRequest(BaseModel):
     task_id: str = "task_1_easy_bug_hunt"
     session_id: str | None = None
 
+    model_config = {"extra": "allow"}
+
 
 class ResetResponse(BaseModel):
     session_id: str
@@ -86,9 +88,10 @@ def list_tasks():
         })
     return {"tasks": tasks}
 
-
 @app.post("/reset", response_model=ResetResponse)
-def reset(req: ResetRequest):
+def reset(req: ResetRequest | None = None):
+    if req is None:
+        req = ResetRequest()
     if req.task_id not in TASK_IDS:
         raise HTTPException(400, f"Unknown task_id {req.task_id!r}. Choose from {TASK_IDS}")
     session_id = req.session_id or str(uuid.uuid4())