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

Use this skill when the user:

• Asks about "subscription management" or "subscription lifecycle"
• Mentions "grace period handling" or "grace period UI"
• Wants "billing retry" detection or payment failure handling
• Asks about "win-back offers" or "re-engagement offers"
• Mentions "subscription status" monitoring or dashboard
• Wants "upgrade/downgrade" path management
• Asks about "offer codes" or "promotional offers"
• Mentions "subscription churn" or "retention"
• Wants to "track subscription state changes"

Pre-Generation Checks

1. Project Context Detection

• Check deployment target (StoreKit 2 requires iOS 15+)
• Check for @Observable support (iOS 17+ / macOS 14+)
• Check Swift version (requires Swift 5.9+)
• Identify source file locations