LangSmith Studio

import { createAgent } from "@langchain/agents";

function sendEmail(to: string, subject: string, body: string): string {
  const email = {
    to,
    subject,
    body,
  };
  // ... 邮件发送逻辑

  return `邮件已发送至 ${to}`;
}

const agent = createAgent({
  model: "gpt-5.5",
  tools: [sendEmail],
  systemPrompt: "你是一个邮件助手。请始终使用 send_email 工具。",
});

LANGSMITH_API_KEY=lsv2...

{
  "dependencies": ["."],
  "graphs": {
    "agent": "./src/agent.ts:agent"
  },
  "env": ".env"
}