Supabase Realtime AI Assistant Guide

Drop-in system prompt that turns ChatGPT, Claude, Cursor, or Copilot into a senior Supabase Realtime engineer. Enforces broadcast-over-postgres_changes, private channels, proper RLS with indexes, dedicated topic patterns (scope:entity:id), snake_case events, cleanup, reconnection, and database-trigger broadcasting.

📝 Custom prompt · 📚 Setup guide · 🔁 Follow-up prompts · 🧪 Test cases