Babysitter nextjs

Next.js specific patterns including App Router, React Server Components, Server Actions, streaming, caching, and Vercel deployment.

install

source · Clone the upstream repo

git clone https://github.com/a5c-ai/babysitter

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/a5c-ai/babysitter "$T" && mkdir -p ~/.claude/skills && cp -r "$T/library/specializations/web-development/skills/nextjs" ~/.claude/skills/a5c-ai-babysitter-nextjs && rm -rf "$T"

manifest: library/specializations/web-development/skills/nextjs/SKILL.md

Next.js Skill

Expert assistance for building full-stack Next.js applications with App Router, React Server Components, Server Actions, and modern deployment patterns.

Capabilities

Generate Next.js project structure with App Router
Implement React Server Components (RSC) patterns
Create Server Actions for form handling and mutations
Configure advanced routing (parallel, intercepting, route groups)
Set up streaming with Suspense boundaries
Implement caching strategies with revalidation
Configure Vercel deployment and edge functions

Usage

Invoke this skill when you need to:

Bootstrap a new Next.js 15+ application
Implement server-side rendering and data fetching
Create API routes and Server Actions
Configure advanced routing patterns
Optimize for Core Web Vitals

Inputs

Parameter	Type	Required	Description
projectName	string	Yes	Name of the Next.js project
router	string	No	app (default) or pages
features	array	No	List of features to scaffold
database	string	No	prisma, drizzle, none
auth	string	No	nextauth, clerk, none
styling	string	No	tailwind, css-modules, styled-components

Feature Configuration

{
  "projectName": "my-saas",
  "features": [
    "authentication",
    "api-routes",
    "server-actions",
    "parallel-routes",
    "middleware"
  ],
  "database": "prisma",
  "auth": "nextauth",
  "styling": "tailwind"
}

Output Structure

my-saas/
├── app/
│   ├── layout.tsx                   # Root layout
│   ├── page.tsx                     # Home page
│   ├── loading.tsx                  # Loading UI
│   ├── error.tsx                    # Error boundary
│   ├── not-found.tsx               # 404 page
│   ├── globals.css                  # Global styles
│   ├── (auth)/                      # Route group
│   │   ├── login/
│   │   │   └── page.tsx
│   │   └── register/
│   │       └── page.tsx
│   ├── dashboard/
│   │   ├── layout.tsx              # Dashboard layout
│   │   ├── page.tsx
│   │   ├── @sidebar/               # Parallel route
│   │   │   └── default.tsx
│   │   └── settings/
│   │       └── page.tsx
│   └── api/
│       └── [...route]/
│           └── route.ts            # API routes
├── components/
│   ├── ui/                         # Reusable UI components
│   └── features/                   # Feature-specific components
├── lib/
│   ├── actions/                    # Server Actions
│   │   └── user-actions.ts
│   ├── db/                         # Database utilities
│   │   └── prisma.ts
│   └── utils/                      # Utility functions
├── middleware.ts                   # Edge middleware
├── next.config.ts                  # Next.js configuration
├── tailwind.config.ts              # Tailwind configuration
└── package.json

Generated Code Patterns

App Router Layout

// 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: {
    default: 'My SaaS',
    template: '%s | My SaaS',
  },
  description: 'A modern SaaS application',
};

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

React Server Component

// app/dashboard/page.tsx
import { Suspense } from 'react';
import { getUser } from '@/lib/db/user';
import { DashboardStats } from '@/components/features/dashboard-stats';
import { DashboardSkeleton } from '@/components/ui/skeletons';

export default async function DashboardPage() {
  const user = await getUser();

  return (
    <main className="container mx-auto py-8">
      <h1 className="text-3xl font-bold">Welcome, {user.name}</h1>

      <Suspense fallback={<DashboardSkeleton />}>
        <DashboardStats userId={user.id} />
      </Suspense>
    </main>
  );
}

Server Action

// lib/actions/user-actions.ts
'use server';

import { revalidatePath } from 'next/cache';
import { redirect } from 'next/navigation';
import { z } from 'zod';
import { prisma } from '@/lib/db/prisma';

const updateProfileSchema = z.object({
  name: z.string().min(1).max(100),
  email: z.string().email(),
});

export async function updateProfile(formData: FormData) {
  const validatedFields = updateProfileSchema.safeParse({
    name: formData.get('name'),
    email: formData.get('email'),
  });

  if (!validatedFields.success) {
    return {
      errors: validatedFields.error.flatten().fieldErrors,
    };
  }

  const { name, email } = validatedFields.data;

  try {
    await prisma.user.update({
      where: { id: getCurrentUserId() },
      data: { name, email },
    });
  } catch (error) {
    return { error: 'Failed to update profile' };
  }

  revalidatePath('/dashboard/settings');
  redirect('/dashboard');
}

Form with Server Action

// app/dashboard/settings/page.tsx
import { updateProfile } from '@/lib/actions/user-actions';
import { SubmitButton } from '@/components/ui/submit-button';

export default function SettingsPage() {
  return (
    <form action={updateProfile} className="space-y-4">
      <div>
        <label htmlFor="name">Name</label>
        <input
          id="name"
          name="name"
          type="text"
          required
          className="w-full border rounded px-3 py-2"
        />
      </div>

      <div>
        <label htmlFor="email">Email</label>
        <input
          id="email"
          name="email"
          type="email"
          required
          className="w-full border rounded px-3 py-2"
        />
      </div>

      <SubmitButton>Update Profile</SubmitButton>
    </form>
  );
}

Middleware

// middleware.ts
import { NextResponse } from 'next/server';
import type { NextRequest } from 'next/server';

export function middleware(request: NextRequest) {
  const token = request.cookies.get('auth-token');

  if (!token && request.nextUrl.pathname.startsWith('/dashboard')) {
    return NextResponse.redirect(new URL('/login', request.url));
  }

  const response = NextResponse.next();

  // Add security headers
  response.headers.set('X-Frame-Options', 'DENY');
  response.headers.set('X-Content-Type-Options', 'nosniff');

  return response;
}

export const config = {
  matcher: ['/dashboard/:path*', '/api/:path*'],
};

API Route Handler

// app/api/users/route.ts
import { NextRequest, NextResponse } from 'next/server';
import { prisma } from '@/lib/db/prisma';

export async function GET(request: NextRequest) {
  const searchParams = request.nextUrl.searchParams;
  const page = parseInt(searchParams.get('page') ?? '1');
  const limit = parseInt(searchParams.get('limit') ?? '10');

  const users = await prisma.user.findMany({
    skip: (page - 1) * limit,
    take: limit,
    select: {
      id: true,
      name: true,
      email: true,
    },
  });

  return NextResponse.json({ users, page, limit });
}

export async function POST(request: NextRequest) {
  const body = await request.json();

  const user = await prisma.user.create({
    data: body,
  });

  return NextResponse.json(user, { status: 201 });
}

Caching Strategies

Static Generation with Revalidation

// Revalidate every hour
export const revalidate = 3600;

export default async function Page() {
  const data = await fetchData();
  return <div>{/* content */}</div>;
}

On-Demand Revalidation

// app/api/revalidate/route.ts
import { revalidatePath, revalidateTag } from 'next/cache';
import { NextRequest, NextResponse } from 'next/server';

export async function POST(request: NextRequest) {
  const { path, tag, secret } = await request.json();

  if (secret !== process.env.REVALIDATION_SECRET) {
    return NextResponse.json({ error: 'Invalid secret' }, { status: 401 });
  }

  if (tag) {
    revalidateTag(tag);
  } else if (path) {
    revalidatePath(path);
  }

  return NextResponse.json({ revalidated: true });
}

Dependencies

{
  "dependencies": {
    "next": "^15.0.0",
    "react": "^19.0.0",
    "react-dom": "^19.0.0"
  },
  "devDependencies": {
    "@types/node": "^22.0.0",
    "@types/react": "^19.0.0",
    "@types/react-dom": "^19.0.0",
    "typescript": "^5.7.0"
  }
}

Workflow

Create project structure - Set up App Router directories
Configure layouts - Root and nested layouts
Implement pages - Server and client components
Add Server Actions - Form handling and mutations
Configure middleware - Auth and security
Set up API routes - REST or tRPC endpoints
Optimize caching - Static and dynamic strategies
Deploy to Vercel - Edge and serverless configuration

Best Practices Applied

App Router with React Server Components
TypeScript strict mode
Server Actions for mutations
Proper loading and error states
Image optimization with next/image
Font optimization with next/font
Metadata API for SEO
Edge-compatible code

References

Next.js Documentation: https://nextjs.org/docs
Next.js DevTools MCP: https://github.com/vercel/next-devtools-mcp
claude-code-nextjs-skills: https://github.com/laguagu/claude-code-nextjs-skills
Vercel Deployment: https://vercel.com/docs

Target Processes

nextjs-full-stack-development
server-component-architecture
api-route-implementation
authentication-setup
deployment-optimization