stack/docs/source.config.ts

import {
  defineConfig,
  defineDocs,
  frontmatterSchema,
  metaSchema,
} from 'fumadocs-mdx/config';
import { z } from 'zod';

// Extended frontmatter schema with lastModified
const extendedFrontmatterSchema = frontmatterSchema.extend({
  lastModified: z.string().optional(),
});

// You can customise Zod schemas for frontmatter and `meta.json` here
// see https://fumadocs.vercel.app/docs/mdx/collections#define-docs
export const docs = defineDocs({
  docs: {
    schema: extendedFrontmatterSchema,
  },
  meta: {
    schema: metaSchema,
  },
});

// Separate collection for API content
export const api = defineDocs({
  dir: './content/api',
  docs: {
    schema: extendedFrontmatterSchema,
  },
  meta: {
    schema: metaSchema,
  },
});

export default defineConfig({
  mdxOptions: {
    // MDX options
  },
});