BeforeMerge: Next.js + Supabase Standards

A curated collection of 53 opinionated, production-proven best practices for building full-stack applications with Next.js (App Router) and Supabase.

When to Apply

Reference these rules when:

• Building new features in a Next.js + Supabase application
• Reviewing pull requests that touch Supabase queries, RLS policies, or server actions
• Setting up auth middleware or session management
• Writing database migrations or RLS policies
• Auditing security of Supabase client usage
• Optimizing performance of server/client component boundaries

Rule Categories by Priority