scaffold-nextjs-app

pjt222

更新日 2 days ago

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メタreactapidesign

について

このスキルは、App RouterとTypeScriptを使用した新しいNext.jsアプリケーションの基盤を構築し、プロジェクト構造、ルーティング、設定を確立します。サーバーサイドレンダリングを備えたReactベースのフルスタック基盤を必要とするウェブプロジェクトを開始する開発者向けです。これを使用して、本番環境対応のTypeScriptウェブアプリケーションをゼロから迅速に生成できます。

クイックインストール

Claude Code

推奨

メイン

npx skills add pjt222/agent-almanac -a claude-code

プラグインコマンド代替

/plugin add https://github.com/pjt222/agent-almanac

Git クローン代替

git clone https://github.com/pjt222/agent-almanac.git ~/.claude/skills/scaffold-nextjs-app

このコマンドをClaude Codeにコピー＆ペーストしてスキルをインストールします

ドキュメント

Scaffold Next.js App

Make new Next.js app with App Router, TypeScript, prod-ready defaults.

When Use

Start new web app project
Make React frontend with server-side rendering
Build full-stack app with API routes
Set up TypeScript web project

Inputs

Required: App name
Required: Package manager (npm, yarn, pnpm)
Optional: Tailwind CSS (default: yes)
Optional: ESLint (default: yes)
Optional: src/ dir structure (default: yes)

Steps

Step 1: Create Project

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

Answer prompts or use flags to set all options non-interactive.

Got: Project dir made with all deps installed.

If fail: Check Node.js version (node --version, must be >= 18.17). Ensure npx available. Command hangs on prompts? Add --use-npm (or --use-pnpm/--use-yarn) to skip package manager prompt.

Step 2: Verify Project Structure

my-app/
├── src/
│   ├── app/
│   │   ├── layout.tsx        # Root layout
│   │   ├── page.tsx          # Home page
│   │   ├── globals.css       # Global styles
│   │   └── favicon.ico
│   └── lib/                  # Shared utilities (create manually)
├── public/                   # Static assets
├── next.config.ts            # Next.js configuration
├── tailwind.config.ts        # Tailwind configuration
├── tsconfig.json             # TypeScript configuration
├── package.json
└── .eslintrc.json

Got: All listed dirs and files present.

If fail: src/ dir missing? --src-dir flag not passed. Re-run create-next-app with flag, or move files manually into src/app/.

Step 3: Configure Next.js

Edit next.config.ts for project needs.

import type { NextConfig } from "next";

const nextConfig: NextConfig = {
  // Enable React strict mode
  reactStrictMode: true,

  // Image optimization domains
  images: {
    remotePatterns: [
      {
        protocol: "https",
        hostname: "example.com",
      },
    ],
  },
};

export default nextConfig;

Got: next.config.ts saved without TypeScript errors.

If fail: File uses .js not .ts? Rename. Ensure NextConfig type imported from "next".

Step 4: Set Up Directory Conventions

Make common dirs.

mkdir -p src/app/api
mkdir -p src/components
mkdir -p src/lib
mkdir -p src/types

Got: All four dirs made under src/.

If fail: src/ does not exist? Make it first or adjust paths to match (non-src layout uses app/ at root).

Step 5: Create Base Layout

Edit src/app/layout.tsx.

import type { Metadata } from "next";
import { Inter } from "next/font/google";
import "./globals.css";

const inter = Inter({ subsets: ["latin"] });

export const metadata: Metadata = {
  title: "My Application",
  description: "Application description",
};

export default function RootLayout({
  children,
}: {
  children: React.ReactNode;
}) {
  return (
    <html lang="en">
      <body className={inter.className}>{children}</body>
    </html>
  );
}

Got: Layout renders with Inter font, wraps all pages.

If fail: Font fails to load? Check network. Replace Inter with system font fallback as temp workaround.

Step 6: Add Example API Route

Make src/app/api/health/route.ts.

import { NextResponse } from "next/server";

export async function GET() {
  return NextResponse.json({ status: "ok", timestamp: new Date().toISOString() });
}

Got: File made at src/app/api/health/route.ts.

If fail: Ensure api/health/ dir exists. File must export named HTTP method handlers (GET, POST, etc.), not default export.

Step 7: Run Dev Server

cd my-app
npm run dev

Got: App running at http://localhost:3000.

If fail: Check Node.js version (>= 18.17). Run npm install if deps missing.

Checks

npm run dev starts without errors
Home page loads at localhost:3000
TypeScript compiles
Tailwind CSS classes applied
API route responds at /api/health
ESLint runs without errors (npm run lint)

Pitfalls

Node.js version: Next.js needs Node.js >= 18.17. Check with node --version.
Port conflicts: Default port 3000 may be used. Use npm run dev -- -p 3001.
Import alias confusion: @/* maps to src/*. Do not confuse with node_modules imports.
Pages vs App Router: Ensure App Router (src/app/) not Pages (src/pages/).

GitHub リポジトリ

pjt222/agent-almanac

パス: i18n/caveman/skills/scaffold-nextjs-app

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