The Security First Guide to AI Development: Edge Functions, Rate Limiting, and Supabase

This post outlines four security pillars for AI application development: keeping API keys server-side via Edge Functions, validating inputs with Zod to prevent prompt injection, delegating authentication to Supabase, and implementing rate limiting to prevent abuse and cost overruns. The guide emphasizes that exposing API keys on the frontend or skipping input validation can lead to data breaches and unexpected billing.