NextJS 16.3.8

packages/app-next-js/package.json

@@ -10,14 +10,14 @@
     "type-check": "tsc --noEmit"
   },
   "dependencies": {
-    "next": "16.2.12",
-    "react": "19.2.8",
-    "react-dom": "19.2.8"
+    "next": "16.3.8",
+    "react": "19.3.0",
+    "react-dom": "19.3.0"
   },
   "devDependencies": {
-    "@types/node": "25.9.5",
-    "@types/react": "19.2.17",
-    "@types/react-dom": "19.2.3",
+    "@types/node": "25.9.8",
+    "@types/react": "19.3.0",
+    "@types/react-dom": "19.3.0",
     "typescript": "6.0.3"
   }
 }

packages/docs/src/content/docs/methodology.md

@@ -71,6 +71,10 @@ describes the Run Time app; starter differences are listed below.
 
 - Astro's runtime app uses its Node adapter in standalone mode; its starter
   builds static output without an adapter or React integration.
+- Next.js uses Turbopack's default filesystem caches for development and
+  production builds. Warm build measurements retain the production build cache
+  created by the cold build. Build-time type checking uses the project-local
+  `tsc` CLI by default.
 - The SolidStart and TanStack Start starters use `nitro()` without an explicit
   preset; their runtime apps explicitly select `node-server`.
 - The TanStack Start runtime app uses the [documented FastResponse optimization](https://tanstack.com/start/latest/docs/framework/react/guide/hosting#performance-tip-fastresponse)

packages/starter-next-js/AGENTS.md

@@ -2,5 +2,8 @@
 
 # This is NOT the Next.js you know
 
-This version has breaking changes — APIs, conventions, and file structure may all differ from your training data. Read the relevant guide in `node_modules/next/dist/docs/` before writing any code. Heed deprecation notices.
+This version has breaking changes — APIs, conventions, and file structure may all differ from your training data. Read the relevant guide in `node_modules/next/dist/docs/` (resolved from this file's directory; in monorepos the `next` package may not be visible from the repo root) before writing any code. Heed deprecation notices.
+
+This block is written and re-added by `next dev` — verify at `node_modules/next/dist/server/lib/generate-agent-files.js`. Removing it from a diff only re-creates the uncommitted change; committing it with your work keeps the tree clean.
+
 <!-- END:nextjs-agent-rules -->

packages/starter-next-js/app/layout.tsx

@@ -17,11 +17,7 @@ export const metadata: Metadata = {
   description: 'Generated by create next app',
 }
 
-export default function RootLayout({
-  children,
-}: Readonly<{
-  children: React.ReactNode
-}>) {
+export default function RootLayout({ children }: LayoutProps<'/'>) {
   return (
     <html
       lang="en"

packages/starter-next-js/app/page.tsx

@@ -5,7 +5,7 @@ export default function Home() {
     <div className="flex flex-col flex-1 items-center justify-center bg-zinc-50 font-sans dark:bg-black">
       <main className="flex flex-1 w-full max-w-3xl flex-col items-center justify-between py-32 px-16 bg-white dark:bg-black sm:items-start">
         <Image
-          className="dark:invert"
+          className="dark:invert h-5 w-[100px]"
           src="/next.svg"
           alt="Next.js logo"
           width={100}
@@ -14,7 +14,11 @@ export default function Home() {
         />
         <div className="flex flex-col items-center gap-6 text-center sm:items-start sm:text-left">
           <h1 className="max-w-xs text-3xl font-semibold leading-10 tracking-tight text-black dark:text-zinc-50">
-            To get started, edit the page.tsx file.
+            To get started, edit the{' '}
+            <code className="rounded bg-black/[.06] px-1.5 py-0.5 font-mono text-[0.9em] dark:bg-white/[.08]">
+              page.tsx
+            </code>{' '}
+            file.
           </h1>
           <p className="max-w-md text-lg leading-8 text-zinc-600 dark:text-zinc-400">
             Looking for a starting point or more instructions? Head over to{' '}
@@ -42,11 +46,11 @@ export default function Home() {
             rel="noopener noreferrer"
           >
             <Image
-              className="dark:invert"
+              className="dark:invert h-[14px] w-4"
               src="/vercel.svg"
               alt="Vercel logomark"
               width={16}
-              height={16}
+              height={14}
             />
             Deploy Now
           </a>

packages/starter-next-js/first-party-dependencies.json

@@ -1,8 +1,8 @@
 {
   "dependencies": {
-    "next": "16.2.12"
+    "next": "16.3.8"
   },
   "devDependencies": {
-    "eslint-config-next": "16.2.12"
+    "eslint-config-next": "16.3.8"
   }
 }

packages/starter-next-js/package.json

@@ -11,16 +11,16 @@
     "type-check": "tsc --noEmit --skipLibCheck"
   },
   "dependencies": {
-    "next": "16.2.12",
-    "react": "19.2.8",
-    "react-dom": "19.2.8"
+    "next": "16.3.8",
+    "react": "19.3.0",
+    "react-dom": "19.3.0"
   },
   "devDependencies": {
     "@tailwindcss/postcss": "4.3.3",
-    "@types/node": "25.9.5",
-    "@types/react": "19.2.17",
-    "@types/react-dom": "19.2.3",
-    "eslint-config-next": "16.2.12",
+    "@types/node": "25.9.8",
+    "@types/react": "19.3.0",
+    "@types/react-dom": "19.3.0",
+    "eslint-config-next": "16.3.8",
     "tailwindcss": "4.3.3"
   }
 }