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API reference: StoreKit 2. Product, Transaction, subscriptions, StoreView, SubscriptionStoreView.
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UX and visual design consultant for iOS apps using Apple's Liquid Glass design system (iOS 26+). Use when asking about element positioning, layout decisions, visual hierarchy, or whether a design choice is "Apple-approved." Provides design rationale and guidance—not code. Helps create Apple Design Award-worthy apps.
| name | storekit |
| user-invocable | true |
| description | API reference: StoreKit 2. Product, Transaction, subscriptions, StoreView, SubscriptionStoreView. |
| context | fork |
| agent | Explore |
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.