Next.js SaaS Application Patterns

Patterns and architecture for building production-grade, multi-tenant SaaS applications using Next.js 16+, React 19, App Router, Supabase auth and modern tooling.

When to Use This Skill

• Starting a new Next.js SaaS project
• Adding multi-tenancy to an existing Next.js app
• Implementing the proxy pattern for auth (API vs UI routes)
• Setting up authentication with Supabase
• Integrating Shadcn/ui component library
• Implementing Context-based state management
• Structuring App Router projects for scale

Quick Reference