This skill provides comprehensive guidance and implementation patterns for building robust subscription billing systems within Claude Code. It covers the entire subscription lifecycle from trial to cancellation, including complex logic for automated dunning management, prorated plan changes, usage-based billing, and multi-jurisdictional tax calculation. By providing standardized code patterns for recurring billing cycles and payment state transitions, it helps developers build secure, reliable, and scalable financial backends for SaaS and e-commerce applications.
Key Features
01Proration calculations for mid-cycle plan upgrades and downgrades
02Subscription lifecycle management (Trial, Active, Past Due, Canceled)
03Automated dunning and payment recovery retry logic
04Multi-region tax, VAT, and GST calculation frameworks
05Usage-based and recurring billing cycle processing
063 GitHub stars
Use Cases
01Building a SaaS subscription backend with recurring payment processing
02Implementing automated invoice generation and customer notification systems
03Managing complex seat-based or usage-based billing adjustments
