90% of vibe-coded apps have at least one critical vulnerability 15 security rules every vibe coder needs before shipping: 1. Never build authentication with AI alone use proven auth providers 2. Keep every secret in environment variables, never inside your code 3. Set session expiration so stolen tokens cannot live forever 4. Verify every package AI suggests before installing it 5. Sanitize all user inputs before they touch your database 6. Add rate limits to your APIs to stop bots and abuse 7. Always enforce permissions on the server, never trust the frontend 8. Make storage private by default so users only access their own files 9. Restrict CORS to your real domains instead of allowing everything 10. Remove debug logs before deploying to production 11. Validate redirect URLs so attackers cannot hijack them 12. Set spending limits on AI APIs to avoid runaway costs 13. Verify webhook signatures before processing external events 14. Log critical actions like payments, role changes, and deletions 15. Keep test and production environments completely separate Save this. Your future self will thank you