# Storekit

> Route StoreKit 2 in-app purchase implementation tasks to the correct Knowledge Contracts -- product loading, purchase initiation, transaction verification, entitlements, transaction updates, restoring purchases, and subscription status/renewal info. Use when calling Product.products(for:), product.purchase(), handling Product.PurchaseResult, checking VerificationResult, reading Transaction.currentEntitlements, calling transaction.finish(), listening to Transaction.updates, calling AppStore.sync(), or reading Product.SubscriptionInfo.Status/RenewalInfo/renewalState. v1 is StoreKit 2 async/await API only -- no legacy StoreKit 1 (SKPaymentQueue/SKProduct/SKPaymentTransaction), no server-side receipt validation or App Store Server API, no StoreKit Configuration file test setup. Triggers on StoreKit, Product.products, product.purchase, PurchaseResult, VerificationResult, currentEntitlements, transaction.finish, Transaction.updates, AppStore.sync, restore purchases, SubscriptionInfo.Status, RenewalInfo, renewalStat

- Skill: `caglarbaranbora/storekit` (Agent Skill)
- Install (CLI): `npx skillmds@latest add caglarbaranbora/storekit`
- Raw SKILL.md: https://api.skillmd.com/api/skills/caglarbaranbora/storekit/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Integrations & APIs
- Author: caglarbaranbora (https://skillmd.com/u/caglarbaranbora)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/caglarbaranbora/storekit

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# StoreKit — Foundations Skill

## Purpose

Route StoreKit 2 in-app purchase implementation tasks to the minimum
required StoreKit Knowledge Contracts. v1 scope is the modern StoreKit 2
async/await API surface only — no legacy StoreKit 1, no server-side
receipt validation or App Store Server API, no StoreKit Configuration
file test setup in Xcode.

## Routing

Load only the contracts relevant to the task. All paths relative to
knowledge/storekit/.

-   Loading products with `Product.products(for:)`, initiating a purchase with `product.purchase()`, or handling `Product.PurchaseResult` (`.success`/`.userCancelled`/`.pending`) -> product-loading-and-purchase.md
-   Checking a `VerificationResult` for `.verified`/`.unverified`, reading `Transaction.currentEntitlements`, or calling `transaction.finish()` -> transaction-verification-and-entitlements.md
-   The `Transaction.updates` listener task or calling `AppStore.sync()` to restore purchases -> transaction-updates-and-restoring-purchases.md
-   Reading `Product.SubscriptionInfo.Status`/`RenewalInfo`/`renewalState`, or same-subscription-group upgrade/downgrade behavior -> subscription-status-and-renewal-info.md

Never load more than the contracts relevant to the specific question.

## Stop Conditions

Stop and report if the requested topic has no matching Knowledge
Contract in knowledge/storekit/ — do not guess or fall back to general
knowledge.

-   Legacy StoreKit 1 (`SKPaymentQueue`, `SKProduct`,
    `SKPaymentTransaction`) — Deferred
-   Server-side receipt validation and the App Store Server API — Deferred
-   StoreKit Configuration file test setup — Deferred
-   The App Review compliance angle — the requirement to use IAP to unlock
    content, prohibited alternative unlock mechanisms, loot-box odds
    disclosure, the restore-mechanism requirement, and the non-expiration
    rule for purchased currencies — owned by `app-store-review-guidelines`