fixes

server/app.py

@@ -85,9 +85,10 @@ def schema() -> SchemaResponse:
 
 
 @app.post("/reset", response_model=Observation)
-def reset(request: ResetRequest) -> Observation:
+def reset(request: Optional[ResetRequest] = Body(default=None)) -> Observation:
     try:
-        return env.reset(difficulty=request.difficulty, seed=request.seed)
+        payload = request or ResetRequest()
+        return env.reset(difficulty=payload.difficulty, seed=payload.seed)
     except ValueError as exc:
         raise HTTPException(status_code=400, detail=str(exc)) from exc
     except Exception as exc:

submission_tests/test_server_api.py

@@ -64,6 +64,13 @@ class ServerApiTests(unittest.TestCase):
         self.assertIn("policy", payload["info"])
         self.assertIn("grader_inputs", payload["info"])
 
+    def test_reset_without_body_uses_defaults(self) -> None:
+        response = self.client.post("/reset")
+        self.assertEqual(response.status_code, 200)
+        observation = response.json()
+        self.assertEqual(observation["task_difficulty"], "easy")
+        self.assertEqual(observation["step_count"], 0)
+
     def test_invalid_reset_payload_returns_422(self) -> None:
         response = self.client.post("/reset", json={"difficulty": "legendary"})
         self.assertEqual(response.status_code, 422)