Vercel での llms.txt

# Place llms.txt in your project's static assets directory.
#
# Framework    → file location
# Next.js      → public/llms.txt
# Astro        → public/llms.txt
# SvelteKit    → static/llms.txt
# Nuxt         → public/llms.txt
# Remix        → public/llms.txt
# Hugo         → static/llms.txt

# Vercel serves it at /llms.txt from their global Edge Network.
# No config changes needed. After deploy, verify:
curl -I https://your-domain.com/llms.txt
# Expected: HTTP/2 200 | Content-Type: text/plain | x-vercel-cache: HIT

// app/llms.txt/route.ts  (Next.js App Router)
// Vercel detects this as a static export when dynamic = 'force-static'
// and caches the output at the edge on first request.

export const dynamic = 'force-static';

export async function GET() {
  const content = [
    '# My Site',
    '',
    '> One-sentence description of what this site is about.',
    '',
    '## Documentation',
    '',
    '- [Getting started](https://yoursite.com/docs/getting-started/): first steps.',
    '- [API reference](https://yoursite.com/docs/api/): full endpoint catalog.',
    '',
    '## Optional',
    '',
    '- [Changelog](https://yoursite.com/changelog/): version history.',
  ].join('\n');

  return new Response(content, {
    headers: {
      'Content-Type': 'text/plain; charset=utf-8',
      'Cache-Control': 'public, max-age=3600, stale-while-revalidate=86400',
    },
  });
}

// api/llms.txt.ts, Vercel Edge Function
// Place this file in the /api directory.
// Vercel routes requests to /api/llms.txt by default,
// so use a vercel.json rewrite to map /llms.txt → /api/llms.txt

import type { VercelRequest, VercelResponse } from '@vercel/node';

export const config = {
  runtime: 'edge', // Runs on Vercel's Edge Network
};

export default function handler(req: Request): Response {
  const content = [
    '# My Site',
    '',
    '> One-sentence description.',
    '',
    '## Core pages',
    '',
    '- [Getting started](https://yoursite.com/docs/getting-started/): first steps.',
  ].join('\n');

  return new Response(content, {
    headers: {
      'Content-Type': 'text/plain; charset=utf-8',
      'Cache-Control': 'public, max-age=3600, s-maxage=86400',
    },
  });
}

// vercel.json, rewrite /llms.txt to your Edge Function or API Route
// Only needed if you're not using Next.js App Router (which handles routing natively)

{
  "rewrites": [
    { "source": "/llms.txt", "destination": "/api/llms" }
  ]
}

# Check headers, look for Content-Type and x-vercel-cache
curl -I https://yoursite.com/llms.txt

# Inspect content
curl https://yoursite.com/llms.txt

# Force-revalidate after a new deploy (Vercel auto-purges on deploy)
# For manual purge via Vercel REST API:
curl -X POST "https://api.vercel.com/v1/projects/{PROJECT_ID}/purge" \
  -H "Authorization: Bearer {VERCEL_TOKEN}"