Run untrusted code with Vercel Sandbox

import { Sandbox } from "@vercel/sandbox";
import { generateText } from 'ai';

const result = await generateText({
    model: "anthropic/claude-4-sonnet-20250514",
    prompt: `Write a Node.js script that prints a Haiku poem to stdout.`,
    system: `
      You are a developer that responds with the content of a single Node.js script.
      You must include only the code without any markdown, nothing else.
      Just include Javascript code and no characters before or after the code.
    `,
  });

  const sandbox = await Sandbox.create();

  await sandbox.writeFiles([
    { path: "script.js", stream: Buffer.from(result.text) },
  ]);

  await sandbox.runCommand({
    cmd: "node",
    args: ["script.js"],
    stdout: process.stdout,
    stderr: process.stderr,
  });