npx create-next-app@latest my-elite-app \
  --typescript \
  --tailwind \
  --eslint \
  --app \
  --src-dir \
  --import-alias "@/*"

import type { NextConfig } from "next";

const nextConfig: NextConfig = {
  experimental: {
    ppr: true, // Enable Partial Pre-rendering
    dynamicIO: true, // New IO optimization for Next.js 16
    reactCompiler: true, // Stable React Compiler support
  },
  logging: {
    fetches: {
      fullUrl: true,
    },
  },
};

export default nextConfig;

import { nextProxy } from 'next/server';

export default nextProxy(async (request) => {
  const url = request.nextUrl;

  // Global Routing Logic
  if (url.pathname.startsWith('/api/v1')) {
    // Standardize API versioning at the proxy level
  }

  // Security Headers & Request Decoration
  request.headers.set('X-Elite-Engine', '16.1.1');
  
  const response = await fetch(request);

  // Performance Monitoring
  response.headers.set('Server-Timing', 'elite;dur=20');

  return response;
});

import { cacheLife, cacheTag } from 'next/cache';

export async function getGlobalMetrics() {
  'use cache';
  cacheLife(60); // Cache for 60 seconds
  cacheTag('metrics');

  const data = await fetch('https://api.internal/metrics').then(r => r.json());
  return data;
}

'use client';
import { useActionState } from 'react';
import { signUpAction } from '@/actions/auth';

export function SignUpForm() {
  const [state, action, isPending] = useActionState(signUpAction, null);

  return (
    <form action={action}>
      <input name="email" type="email" required />
      {state?.errors?.email && <p className="text-red-500">{state.errors.email}</p>}
      
      <button disabled={isPending}>
        {isPending ? 'Processing...' : 'Sign Up'}
      </button>
    </form>
  );
}

import { Activity } from 'react';

export function TabSystem({ activeTab }) {
  return (
    <>
      <Activity mode={activeTab === 'home' ? 'visible' : 'hidden'}>
        <HomeTab />
      </Activity>
      <Activity mode={activeTab === 'settings' ? 'visible' : 'hidden'}>
        <SettingsTab />
      </Activity>
    </>
  );
}

// app/dashboard/page.tsx
import { getGlobalMetrics } from '@/services/data';

export default async function Page() {
  const metrics = await getGlobalMetrics(); // Direct, cached call

  return (
    <div>
      <h1>Dashboard</h1>
      <pre>{JSON.stringify(metrics, null, 2)}</pre>
    </div>
  );
}

// actions/auth.ts
'use server';
import { updateTag } from 'next/cache';

export async function signUpAction(prevState: any, formData: FormData) {
  const email = formData.get('email');
  
  try {
    await db.user.create({ data: { email } });
    updateTag('users'); // Background revalidation
    return { success: true };
  } catch (e) {
    return { errors: { email: 'Invalid email' } };
  }
}

'use client';
import { useState, useEffect } from 'react';

export function SafeClientComponent({ children }) {
  const [mounted, setMounted] = useState(false);
  useEffect(() => setMounted(true), []);

  if (!mounted) return <div className="animate-pulse" />; // Placeholder
  return <>{children}</>;
}