llms.txt لـ Express.js

// server.js
const express = require('express');
const app = express();

// Serve everything in ./public/ at the root URL.
// If public/llms.txt exists, it is available at /llms.txt automatically.
app.use(express.static('public'));

app.listen(3000, () => console.log('Listening on http://localhost:3000'));

// Project structure:
// your-express-app/
// ├── public/
// │   └── llms.txt   ← add this
// └── server.js

app.use(express.static('public', { maxAge: '1h' }));

// server.js, dedicated GET route
const express = require('express');
const app = express();

const llmsContent = `# Your Site

> One-sentence description of what your site or product does.

## Documentation

- [Getting Started](https://yoursite.com/docs/start): Install and configure in minutes.
- [API Reference](https://yoursite.com/docs/api): Full endpoint catalog with examples.

## Product

- [Overview](https://yoursite.com/product): Core features and capabilities.
- [Pricing](https://yoursite.com/pricing): Plans and billing details.

## Optional

- [Changelog](https://yoursite.com/changelog): Release history.
- [GitHub](https://github.com/your-org/your-repo): Source code.
`;

app.get('/llms.txt', (req, res) => {
  res.type('text/plain');
  res.set('Cache-Control', 'public, max-age=3600, stale-while-revalidate=86400');
  res.send(llmsContent);
});

app.listen(3000);

// server.ts, TypeScript version with typed Request/Response
import express, { Request, Response } from 'express';

const app = express();

const llmsContent = `# Your Site

> One-sentence description of your product or service.

## Documentation

- [Getting Started](https://yoursite.com/docs/start): Quick setup guide.
- [API Reference](https://yoursite.com/docs/api): Full endpoint catalog.

## Optional

- [Changelog](https://yoursite.com/changelog): Release history.
`;

app.get('/llms.txt', (req: Request, res: Response): void => {
  res.set({
    'Content-Type': 'text/plain; charset=utf-8',
    'Cache-Control': 'public, max-age=3600, stale-while-revalidate=86400',
  });
  res.send(llmsContent);
});

app.listen(3000, () => console.log('Server running on http://localhost:3000'));

// server.js, generate llms.txt dynamically from route metadata
const express = require('express');
const app = express();

// Define your public routes with metadata
const publicRoutes = [
  { title: 'Getting Started', path: '/docs/start', description: 'Install and configure in minutes.' },
  { title: 'API Reference', path: '/docs/api', description: 'Full endpoint catalog with examples.' },
  { title: 'Authentication', path: '/docs/auth', description: 'OAuth 2.0 and API key setup.' },
  { title: 'Webhooks', path: '/docs/webhooks', description: 'Event payloads and retry policy.' },
  { title: 'Pricing', path: '/pricing', description: 'Plans and billing details.' },
];

const SITE_URL = process.env.SITE_URL || 'https://yoursite.com';

app.get('/llms.txt', (req, res) => {
  const links = publicRoutes
    .map((r) => `- [${r.title}](${SITE_URL}${r.path}): ${r.description}`)
    .join('\n');

  const body = [
    '# Your Site',
    '',
    '> One-sentence description of your product.',
    '',
    '## Documentation',
    '',
    links,
  ].join('\n');

  res.set({
    'Content-Type': 'text/plain; charset=utf-8',
    'Cache-Control': 'public, max-age=3600, stale-while-revalidate=86400',
  });
  res.send(body);
});

app.listen(3000);

res.set('Cache-Control', 'public, max-age=3600, stale-while-revalidate=86400');

# Check headers
curl -I http://localhost:3000/llms.txt
# Expected:
# HTTP/1.1 200 OK
# Content-Type: text/plain; charset=utf-8
# Cache-Control: public, max-age=3600

# Check content
curl http://localhost:3000/llms.txt | head -5
# Should print:  # Your Site