fix(server): accept trailing-slash JSON-RPC endpoint; enqueue Task in TCK SUT

src/a2a/server/routes/jsonrpc_routes.py

@@ -64,5 +64,10 @@ def create_jsonrpc_routes(
             path=rpc_url,
             endpoint=dispatcher.handle_requests,
             methods=['POST'],
-        )
+        ),
+        Route(
+            path=f'{rpc_url}/',
+            endpoint=dispatcher.handle_requests,
+            methods=['POST'],
+        ),
     ]

tck/sut_agent.py

@@ -14,6 +14,7 @@
 import a2a.types.a2a_pb2_grpc as a2a_grpc
 
 from a2a.compat.v0_3.grpc_handler import CompatGrpcHandler
+from a2a.helpers.proto_helpers import new_task_from_user_message
 from a2a.server.agent_execution.agent_executor import AgentExecutor
 from a2a.server.agent_execution.context import RequestContext
 from a2a.server.events.event_queue import EventQueue
@@ -87,6 +88,13 @@ async def execute(
 
         self.running_tasks.add(task_id)
 
+        # 1.0 semantics: the Task itself must be enqueued before any
+        # TaskStatusUpdateEvent (the SDK enforces this ordering).
+        task = context.current_task
+        if not task:
+            task = new_task_from_user_message(user_message)
+            await event_queue.enqueue_event(task)
+
         logger.info(
             '[SUTAgentExecutor] Processing message %s for task %s (context: %s)',
             user_message.message_id,
@@ -157,11 +165,11 @@ def serve(task_store: TaskStore) -> None:
             ),
             AgentInterface(
                 url=f'http://localhost:{http_port}{REST_URL}',
-                protocol_binding='REST',
+                protocol_binding='HTTP+JSON',
                 protocol_version='1.0.0',
             ),
             AgentInterface(
-                url=f'http://localhost:{grpc_port}',
+                url=f'localhost:{grpc_port}',
                 protocol_binding='GRPC',
                 protocol_version='1.0.0',
             ),

tests/server/routes/test_jsonrpc_routes.py

@@ -26,12 +26,18 @@ def test_routes_creation(agent_card, mock_handler):
     )
 
     assert isinstance(routes, list)
-    assert len(routes) == 1
+    # Both the exact path and the trailing-slash variant are registered so
+    # that clients sending either form (httpx normalizes empty paths to a
+    # trailing slash) reach the endpoint.
+    assert len(routes) == 2
 
     from starlette.routing import Route
 
-    assert isinstance(routes[0], Route)
-    assert routes[0].methods == {'POST'}
+    for route in routes:
+        assert isinstance(route, Route)
+        assert route.methods == {'POST'}
+
+    assert {route.path for route in routes} == {'/a2a/jsonrpc', '/a2a/jsonrpc/'}
 
 
 def test_jsonrpc_custom_url(agent_card, mock_handler):