From 6f5626bcc3157d56f8538c60b328470db5386375 Mon Sep 17 00:00:00 2001
From: Marc LeBlanc <7050295+marcleblanc2@users.noreply.github.com>
Date: Thu, 10 Sep 2026 23:55:48 -0600
Subject: [PATCH] site/api-md: Prerender /api/md/* at build time; enable Fluid
 compute

Every doc page's markdown is now written as a static file during the
build, so .md requests are served from the CDN instead of invoking a
serverless function per request. Unknown slugs 404 without a function
call (dynamicParams = false).

vercel.json gains "fluid": true so the remaining functions (/api/og,
the catch-all page renderer) share instances instead of cold-starting
one per concurrent request.

Amp-Thread-ID: https://ampcode.com/threads/T-01a08e2d-682f-75dd-a050-cb9bf8888dac
Co-authored-by: Amp <amp@ampcode.com>
---
 src/app/api/md/[...slug]/route.ts | 15 +++++++++++++--
 vercel.json                       |  1 +
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/app/api/md/[...slug]/route.ts b/src/app/api/md/[...slug]/route.ts
index 5c8866022..51a3d8de6 100644
--- a/src/app/api/md/[...slug]/route.ts
+++ b/src/app/api/md/[...slug]/route.ts
@@ -1,8 +1,19 @@
 import {allPosts} from 'contentlayer/generated';
-import {NextRequest, NextResponse} from 'next/server';
+import {NextResponse} from 'next/server';
+
+// Prerender every post's markdown at build time; unknown slugs 404 without
+// invoking a function.
+export const dynamicParams = false;
+
+export function generateStaticParams() {
+	// The root index.mdx has an empty path; a catch-all needs at least one segment.
+	return allPosts
+		.filter(post => post._raw.flattenedPath !== '')
+		.map(post => ({slug: post._raw.flattenedPath.split('/')}));
+}
 
 export async function GET(
-	_: NextRequest,
+	_: Request,
 	{params}: {params: {slug: string[]}}
 ) {
 	const docPath = params.slug.join('/');
diff --git a/vercel.json b/vercel.json
index 1625d94ae..7e1c6b897 100644
--- a/vercel.json
+++ b/vercel.json
@@ -1,4 +1,5 @@
 {
 	"$schema": "https://openapi.vercel.sh/vercel.json",
+	"fluid": true,
 	"ignoreCommand": "git diff --quiet HEAD^ HEAD -- . ':(exclude).github' ':(exclude).agents' ':(exclude).amp' ':(exclude).vscode' ':(exclude)AGENTS.md' ':(exclude)README.md' ':(exclude).gitignore' ':(exclude)cspell*'"
 }