A Next.js CMS for client sites your agent writes

// next.config.mjs
const site = new URL(process.env.SITE_URL ?? 'http://localhost:3000/');

export default {
  output: 'export',      // static HTML, no server at request time
  basePath: site.pathname.replace(/\/$/, ''), // '' live, '/p/<slug>' in preview
  trailingSlash: true,   // /about/index.html, not /about.html
  images: { unoptimized: true },
};

// package.json — the platform runs `npm run build` and serves dist/
"scripts": { "build": "next build && rm -rf dist && cp -R out dist" }

// public/_meta.json — copied into dist/ with the rest of public/
{ "immutable": ["/_next/static/"] }

// lib/jtk.ts — runs at build time, never in the browser
import { readFileSync } from 'node:fs';

const file = process.env.JTK_CONTENT_FILE;
export const published = file ? JSON.parse(readFileSync(file, 'utf8')) : null;

// data-jtk-path only when the platform asks for it
export const tap = (path: string) =>
  process.env.PUBLIC_JTK_ANNOTATE ? { 'data-jtk-path': path } : {};

// app/page.tsx
<h1 {...tap('blocks[0].title')}>{hero.title}</h1>

// app/robots.ts
export const dynamic = 'force-static';
const site = process.env.SITE_URL!.replace(/\/?$/, '/');
export default function robots() {
  return { rules: { userAgent: '*', allow: '/' },
           sitemap: new URL('sitemap.xml', site).href };
}