✅ ZERO-ERROR LAUNCH GATEWAY

The Master Interactive Launch & Security Checklist

Before you tweet your link or show your product to investors, tick every item in these 6 audit gates. Your progress is saved automatically to your local browser!

🧹 GATE 01: Code & Git Cleanliness Security Pre-flight

.env.local verified inside .gitignore and NOT committed to GitHub

All temporary console.log() and hardcoded dummy tokens removed

npm run build runs cleanly on local PowerShell with ZERO TypeScript or lint errors

Favicon, custom app title, and OpenGraph social banner added in app/layout.tsx

🔐 GATE 02: Database & RLS Lockdown Data Protection

Row Level Security (RLS) enabled on EVERY single public table in Supabase

Tested with two separate user accounts: User A CANNOT see or edit User B's rows

Service role key (SUPABASE_SERVICE_ROLE_KEY) is NEVER imported in client components

Database indexes added to foreign key columns (e.g. user_id) for fast queries

🛡️ GATE 03: Authentication & Session Guard User Security

Protected routes (e.g. /dashboard) bounce logged-out users to /login

Email confirmation and password reset flows tested with a real email inbox

Password inputs enforce minimum 8 characters with show/hide password toggle

Google OAuth redirect URI configured for both localhost and production domain

🌐 GATE 04: Domain, DNS & Email Health Infrastructure

Root domain (yourdomain.com) redirects cleanly to www (or vice versa)

HTTPS SSL padlock confirmed active with no mixed-content warnings in console

Resend SPF (TXT), DKIM (CNAME), and DMARC (TXT) verified with 3 green checkmarks

Transactional emails do NOT land in the Gmail spam folder

📱 GATE 05: Mobile Responsiveness & Error States User Experience

Tested on a real mobile smartphone screen (no horizontal overflow scrollbars)

Buttons show loading spinners when clicked so users don't double-submit forms

Empty states handled: When a user has 0 notes, display a friendly prompt to add one

Custom 404 page created (app/not-found.tsx) with a button back to homepage

💰 GATE 06: Cost & Billing Guardrails Financial Protection

Hard spending limit configured ($5 or $10) on AI API providers (OpenAI / Google Cloud)

Rate limiting enforced on AI endpoints to prevent abusive bots from burning tokens

Email billing threshold alerts configured at 50% and 80% usage

Free-tier limits documented with planned upgrade trigger points