next.config.mjs

import remarkGfm from "remark-gfm";
import createMDX from "@next/mdx";
import rehypeSlug from "rehype-slug";
import rehypePrettyCode from "rehype-pretty-code";
import rehypeAutolinkHeadings from "rehype-autolink-headings";

/** @type {import('next').NextConfig} */
const nextConfig = {
  // Configure `pageExtensions` to include MDX files
  pageExtensions: ["js", "jsx", "mdx", "ts", "tsx"],
  // Optionally, add any other Next.js config below
};
const withMDX = createMDX({
  options: {
    remarkPlugins: [remarkGfm],
    rehypePlugins: [
      rehypeSlug,
      [rehypePrettyCode, { theme: "github-dark" }],
      [
        rehypeAutolinkHeadings,
        {
          behavior: "wrap",
          properties: {
            className: ["subheading-anchor"],
            ariaLabel: "Link to section",
          },
        },
      ],
    ],
  },
});

export default withMDX(nextConfig);