Next.js 15 + Antigravity: The Ultimate React Developer Workflow

Why Next.js 15 + Antigravity is the Ultimate Combo

Next.js 15 introduced significant changes: improved caching, Turbopack by default, and refined Server Components. Google Antigravity's Gemini 3 model was trained extensively on Next.js codebases, making it the best AI assistant for modern React development.

This guide covers everything: from initial setup to production deployment, with battle-tested prompts for every common Next.js pattern.

Setting Up the Perfect Development Environment

Step 1: Project Initialization

Start with Agent Mode (Cmd+Shift+A):

"Create a new Next.js 15 project with:

• App Router with TypeScript strict mode
• Tailwind CSS with custom design system
• Supabase for auth and database
• Proper folder structure (components, lib, types, hooks)
• ESLint and Prettier configured
• Path aliases (@/ for src)
• Environment variables setup with .env.example"

Step 2: Next.js-Optimized .antigravity Rules

# Next.js 15 Development Rules

## Framework Patterns
- Use Server Components by default (no 'use client' unless necessary)
- Prefer Server Actions over API routes for mutations
- Use React Server Components for data fetching
- Implement proper loading.tsx and error.tsx boundaries
- Use generateStaticParams for static generation where possible

## App Router Structure
- Route groups for layouts: (auth), (dashboard), (marketing)
- Parallel routes for complex UIs
- Intercepting routes for modals
- Use route handlers (route.ts) only for webhooks and external APIs

## Data Fetching
- Fetch in Server Components, not client
- Use 'cache: no-store' only when necessary
- Implement proper revalidation strategies
- Use React.cache() for request deduplication

## Server Actions
- Create actions in separate files (actions.ts)
- Always validate input with Zod
- Return typed responses with proper error handling
- Use revalidatePath/revalidateTag after mutations

## Performance
- Use dynamic imports for heavy components
- Implement proper image optimization with next/image
- Use Suspense boundaries strategically
- Minimize client-side JavaScript