initial commit

app/api/preview/route.ts

@@ -0,0 +1,8 @@
+import { readJson, route } from "@/lib/http";
+import { renderMarkdown } from "@/lib/markdown";
+
+/** Body: { markdown } -> { html }, rendered by the site's own pipeline. */
+export const POST = route(async (req) => {
+  const { markdown } = await readJson<{ markdown?: string }>(req);
+  return Response.json({ html: await renderMarkdown(markdown ?? "") });
+});