Mastra

import { Agent } from "@mastra/core/agent";
import { createTool } from "@mastra/core/tools";
import { openai } from "@ai-sdk/openai";
import { z } from "zod";

const weatherTool = createTool({
  id: "get-weather",
  description: "Get the current weather for a location",
  inputSchema: z.object({
    location: z.string().describe("The city name"),
  }),
  outputSchema: z.object({
    temperature: z.number(),
    condition: z.string(),
  }),
  execute: async ({ context }) => {
    // context.location comes from the input schema
    return { temperature: 72, condition: "Sunny in " + context.location };
  },
});

const agent = new Agent({
  name: "Weather Agent",
  instructions: "You are a helpful weather assistant.",
  model: openai("gpt-4o"),
  tools: { "get-weather": weatherTool },
});

const response = await agent.generate(
  "What's the weather in San Francisco?"
);
console.log(response.text);