API reference: StoreKit 2. Product, Transaction, subscriptions, StoreView, SubscriptionStoreView.
StoreKit 2 for in-app purchases and subscriptions (iOS 26+).
| File | Content |
|---|---|
| storekit-overview.md | Full StoreKit framework index |
| product.md | Product struct |
| transaction.md | Transaction verification & history |
| subscriptioninfo.md |
| Subscription info & status |
| storeview.md | StoreView (product display) |
| subscriptionstoreview.md | SubscriptionStoreView |
.md files first.SKILL.md frontmatter, then grep their local files. This is faster and uses less context than fetching new docs from the internet.storekit-overview.md with the sosumi.ai Markdown mirror. For example, /documentation/storekit/product maps to https://sosumi.ai/documentation/storekit/product.