AI SDK v5 (legacy)

import { openai } from "@ai-sdk/openai";
import { streamText, convertToModelMessages, tool } from "ai";
import type { UIMessage } from "ai";
import { z } from "zod";

export const maxDuration = 30;

export async function POST(req: Request) {
  const { messages }: { messages: UIMessage[] } = await req.json();

  const aiSDKTools = {
    get_current_weather: tool({
      description: "Get the current weather",
      inputSchema: z.object({ city: z.string() }),
      execute: async ({ city }) => `The weather in ${city} is sunny`,
    }),
  };

  const result = streamText({
    abortSignal: req.signal,
    model: openai.responses("gpt-6-luna"),
    messages: convertToModelMessages(messages, { tools: aiSDKTools }),
    tools: aiSDKTools,
  });
  return result.toUIMessageStreamResponse();
}

"use client";

import { Thread } from "@/components/assistant-ui/elements/thread.aui";
import { AssistantRuntimeProvider } from "@assistant-ui/react";
import { useChatRuntime } from "@assistant-ui/react-ai-sdk";

export default function Home() {
  const runtime = useChatRuntime();
  return (
    <AssistantRuntimeProvider runtime={runtime}>
      <div className="h-full">
        <Thread />
      </div>
    </AssistantRuntimeProvider>
  );
}