Trigger response on initial messages

[jorgemasta]

I want to start a thread with an initial user message received by the search params.

  const searchParams = useSearchParams();
  const message = searchParams.get("message");
  const runtime = useChatRuntime({
    api: "/api/chat",
    initialMessages: [
      {
        role: "user",
        content: [{ type: "text", text: message || "" }],
      },
    ],
  });

It adds the message correctly to the thread but I haven't found any programmatic way to force an assistant response, I need to add a new message manually.

Using append instead of initialMessages doesn't do the trick since it responds with an empty response (the api call is cancelled for some reason)