validation-box/doc/source.config.ts

The only validation library - with flexible regex - you need.

import { defineDocs, defineConfig } from 'fumadocs-mdx/config';
import { remarkInstall } from 'fumadocs-docgen';
 
export const docs = defineDocs({
  dir: 'content/docs'
});
 
export default defineConfig({
  mdxOptions: {
    remarkPlugins: [remarkInstall]
  }
});