Playbooks & production notes

Revenue

Payment and entitlement guidance for making sure successful charges grant the right access, and cancellations, refunds, and failures remove it.

Checkout, webhooks, entitlements, and the gap between a successful charge and the access it is supposed to grant. For founders taking money through an AI-built app. Start with "Your App Gives Away Paid Access for Free (Stripe Looks Fine)", then "6 Ways Your Vibe-Coded Checkout Leaks Money".

All Launch Readiness Security Data Safety Stability Deployment Performance Revenue Maintainability

10 playbooks

Revenue

Base44 App Store Subscriptions: Why StoreKit Billing Is Blocked and What to Do

AI API Costs: Calculate COGS and Gross Margin

Free Trial Abuse: Fix the Gate Before Fraud Tools

Stripe Subscription Payment Failed: What Your App Should Do

Stripe Test Mode to Live: Go-Live Checklist

Stripe Subscription Canceled but Still Has Access?

Usage-Based Billing Mistakes: 5 Metering Failures

Stripe Webhook Verification: Why Signature Checks Fail

Your App Gives Away Paid Access for Free (Stripe Looks Fine)

6 Ways Your Vibe-Coded Checkout Leaks Money