add backend tool call

Author: mme

typescript-sdk/apps/dojo/src/app/[integrationId]/feature/agentic_chat/page.tsx

@@ -29,6 +29,34 @@ const AgenticChat: React.FC<AgenticChatProps> = ({ params }) => {
 const Chat = () => {
   const [background, setBackground] = useState<string>("--copilot-kit-background-color");
 
+  useCopilotAction({
+    name: "lookup_weather",
+    description: "Lookup the weather for a given city",
+    parameters: [
+      {
+        name: "city",
+        type: "string",
+        description: "The city to lookup the weather for",
+      },
+      {
+        name: "weather",
+        type: "string",
+        description: "The weather for the city",
+      },
+    ],
+    render: ({ status, args }) => {
+      return (
+        <div>
+          <div>
+            Looked up weather for {args.city}: {args.weather}
+          </div>
+          <div>Status: {status}</div>
+        </div>
+      );
+    },
+    followUp: false,
+  });
+
   useCopilotAction({
     name: "change_background",
     description:

typescript-sdk/integrations/server-starter-all-features/server/python/example_server/agentic_chat.py

@@ -17,7 +17,11 @@
     TextMessageEndEvent,
     ToolCallStartEvent,
     ToolCallArgsEvent,
-    ToolCallEndEvent
+    ToolCallEndEvent,
+    MessagesSnapshotEvent,
+    ToolMessage,
+    ToolCall,
+    AssistantMessage
 )
 from ag_ui.encoder import EventEncoder
 
@@ -54,6 +58,9 @@ async def event_generator():
         elif last_message_content == "tool":
             async for event in send_tool_call_events():
                 yield encoder.encode(event)
+        elif last_message_content == "backend_tool":
+            async for event in send_backend_tool_call_events(input_data.messages):
+                yield encoder.encode(event)
         else:
             async for event in send_text_message_events():
                 yield encoder.encode(event)
@@ -167,3 +174,37 @@ async def send_tool_call_events():
         type=EventType.TOOL_CALL_END,
         tool_call_id=tool_call_id
     )
+
+async def send_backend_tool_call_events(messages):
+    """Send backend tool call events"""
+    tool_call_id = str(uuid.uuid4())
+
+    new_message = AssistantMessage(
+        id=str(uuid.uuid4()),
+        role="assistant",
+        tool_calls=[
+            ToolCall(
+                id=tool_call_id,
+                type="function",
+                function={
+                    "name": "lookup_weather",
+                    "arguments": json.dumps({"city": "San Francisco", "weather": "sunny"})
+                }
+            )
+        ]
+    )
+
+    result_message = ToolMessage(
+        id=str(uuid.uuid4()),
+        role="tool",
+        content="The weather in San Francisco is sunny.",
+        tool_call_id=tool_call_id
+    )
+
+    all_messages = list(messages) + [new_message, result_message]
+
+    # Send messages snapshot event
+    yield MessagesSnapshotEvent(
+        type=EventType.MESSAGES_SNAPSHOT,
+        messages=all_messages
+    )