Syntax highlighting

export default {
  shiki: {
    themes: {
      light: "github-light",
      dark: "github-dark",
    },
    langs: ["typescript", "tsx", "javascript", "jsx", "json", "css"],
  },
};

Only languages listed in shiki.langs are enabled for highlighting. They are loaded on demand, while unsupported or unlisted languages safely render as plain text. Keep the list limited to formats used by the site so production bundles stay small.