npx command

create-agentic-app/template/src/app/api/chat/route.ts

@@ -0,0 +1,15 @@
+import { openai } from "@ai-sdk/openai";
+import { streamText, UIMessage, convertToModelMessages } from "ai";
+
+export async function POST(req: Request) {
+  const { messages }: { messages: UIMessage[] } = await req.json();
+
+  const result = streamText({
+    model: openai(process.env.OPENAI_MODEL || "gpt-5-mini"),
+    messages: convertToModelMessages(messages),
+  });
+
+  return (
+    result as unknown as { toUIMessageStreamResponse: () => Response }
+  ).toUIMessageStreamResponse();
+}