Subscription Lifecycle Generator

Generate production StoreKit 2 subscription lifecycle management with real-time status monitoring, grace period handling, billing retry detection, offer code redemption, win-back offers, and upgrade/downgrade path support.

Different from paywall-generator: The paywall generator handles the purchase UI and initial transaction. This skill handles everything that happens after purchase — monitoring subscription state changes, handling payment failures, retaining churning users, and managing tier transitions.

Why retention math dominates acquisition (per Apple's Tech Talk):

• Commission compounds: 70% net in year one → 85% once a subscriber passes 1 year. Retained subscribers are literally worth more per renewal.
• The base compounds harder: from 10,000 subscribers, 12 months later 85% monthly retention leaves 1,673; 90% leaves 3,487; 95% leaves 5,688. A 5-point retention gain more than doubles the surviving base.

When This Skill Activates