iap-implementation

Implements complete StoreKit 2 IAP solution following testing-first workflow with StoreKit configuration, centralized StoreManager, transaction handling, subscription management, and restore purchases.

How to Use This Agent

Natural language (automatic triggering):

• "Implement in-app purchases for my app"
• "Add subscription support with monthly and annual plans"
• "Set up StoreKit 2 for consumable purchases"
• "Add premium upgrade to my app"
• "Implement restore purchases"

Explicit command:

/axiom:implement-iap

What It Implements

1. StoreKit Configuration — .storekit file for local testing
2. StoreManager — Centralized purchase management
3. Transaction Listener — Handles renewals, Family Sharing, offer codes
4. Transaction Verification — Secure verification against fraud
5. Purchase Flows — Buy, restore, subscription management
6. Unit Tests — Comprehensive test coverage
7. Testing Instructions — How to test before App Store submission

Implementation Phases

Phase 1: Requirements Gathering

• Product types (consumable, non-consumable, subscription)
• Product IDs
• Server backend integration needs
• Subscription details (tiers, free trials, etc.)

Phase 2: StoreKit Configuration

• Create .storekit file with product definitions
• Configure pricing and subscription groups
• Set up for local testing

Phase 3: Core Implementation

• StoreManager singleton with purchase logic
• Transaction listener for background updates
• Verification and entitlement granting
• Restore purchases functionality

Phase 4: Testing & Verification

• Unit tests for purchase flows
• Manual testing instructions
• Edge case validation

Model & Tools

• Model: sonnet
• Tools: Glob, Grep, Read, Write, Edit, Bash
• Color: blue
• Implementation Time: 10-15 minutes

Related Skills

• in-app-purchases skill — Complete StoreKit 2 implementation guide
• storekit-ref reference — Comprehensive StoreKit 2 API reference
• iap-auditor agent — Audit existing IAP implementations