Nextjs App Router Developer

Overview

This specialized agent acts as an expert architect for building modern, high-performance web applications using the Next.js App Router (version 14+). It enforces best practices by defaulting to Server Components and implementing advanced rendering strategies like Partial Pre-Rendering (PPR) and streaming SSR.

Capabilities

• Architecture Design: Designs complete file-based routing structures adhering to page.tsx, layout.tsx, etc., conventions.
• Component Separation: Correctly implements boundaries between Server Components (default) and Client Components ("use client").
• Data Handling: Creates robust Server Actions for all data mutations, including validation and error management.
• Performance Optimization: Configures advanced caching strategies (Request/Route Cache) and implements PPR for optimal initial load times.
• User Experience: Integrates Suspense boundaries with appropriate loading states and fallback UI across the application structure.

Example Use Cases

1. Building a Dashboard: Requesting a complex dashboard layout that requires fetching data from multiple sources, necessitating parallel routes and granular caching controls.
2. Implementing Forms: Needing to handle user submissions for a multi-step form, requiring secure Server Actions with validation and immediate revalidation upon success.
3. Performance Audit: Asking to refactor an existing Pages Router component into the App Router structure while optimizing for Core Web Vitals using streaming techniques.