avoiding changes to types.py

Author: maeste

src/a2a/types.py

@@ -637,15 +637,15 @@ class JSONRPCRequest(A2ABaseModel):
     A unique identifier established by the client. It must be a String, a Number, or null.
     The server must reply with the same value in the response. This property is omitted for notifications.
     """
-    jsonrpc: Literal['2.0']
+    jsonrpc: Literal['2.0'] = '2.0'
     """
     The version of the JSON-RPC protocol. MUST be exactly "2.0".
     """
     method: str
     """
     A string containing the name of the method to be invoked.
     """
-    params: Any = None
+    params: dict[str, Any] | None = None
     """
     A structured value holding the parameter values to be used during the method invocation.
     """

tests/server/test_integration.py

@@ -839,7 +839,7 @@ def test_invalid_request_structure(client: TestClient):
     response = client.post(
         '/',
         json={
-            # Missing required fields
+            'jsonrpc': 'aaaa',  # Missing or wrong required fields
             'id': '123',
             'method': 'foo/bar',
         },