Rename occurrences of CSK to Checkout Kit

[tiagocandido]

What changes are you making?

Renames the Android library from Shopify Checkout Sheet Kit to Shopify Checkout Kit as part of the broader cross-platform rebranding effort.

Package and artifact

• Maven artifact: com.shopify:checkout-sheet-kit → com.shopify:checkout-kit
• Android package/namespace: com.shopify.checkoutsheetkit → com.shopify.checkoutkit
• Env var used to override the published version: CHECKOUT_SHEET_KIT_VERSION → CHECKOUT_KIT_VERSION

Source files and directories

• lib/src/main/java/com/shopify/checkoutsheetkit/ → checkoutkit/
• lib/src/test/java/com/shopify/checkoutsheetkit/ → checkoutkit/
• ShopifyCheckoutSheetKit.kt → ShopifyCheckoutKit.kt
• ShopifyCheckoutSheetKitTest.kt → ShopifyCheckoutKitTest.kt
• checkout-sheet-kit.png → checkout-kit.png

Branding strings ("Checkout SDK" → "Checkout Kit")

• Android resource IDs: checkoutSdkContainer, checkoutSdkHeader, checkoutSdkCloseBtn → checkoutKitContainer, checkoutKitHeader, checkoutKitCloseBtn
• dialog_checkout.xml and checkout_menu.xml updated accordingly

Sample app

• Package renamed: com.shopify.checkout_sdk_mobile_buy_integration_sample → com.shopify.checkout_kit_mobile_buy_integration_sample
• CheckoutSdkApp.kt → CheckoutKitApp.kt
• DataStore preferences key: "checkoutSheetKitSettingsV2" → "checkoutKitSettings" (V-suffix dropped as part of this clean break)

Not changed (cross-team web checkout contracts)

• ShopifyCheckoutSDK in the user-agent string — parsed by the web checkout; requires web team coordination
• window.MobileCheckoutSdk in the JS bridge — a global defined by the web checkout's JavaScript; renaming it unilaterally would silently break all bridge messages
• checkout-sdk.myshopify.com test fixture URLs — not a branding reference

How to test

1. Run the test suite — all 168 tests should pass:

   cd android
   ./gradlew clean test --console=plain

2. Verify the public API surface is consistent with the rename:

   ./gradlew :lib:apiCheck

   If it fails after a clean build, regenerate with ./gradlew :lib:apiDump and review the diff.

3. Build the sample app to confirm the renamed package compiles end-to-end:

   cd android/samples/MobileBuyIntegration
   cp .env.example .env  # fill in real values if needed
   ./gradlew assembleDebug

4. Consumer migration check — any app importing the old library will need to:

   • Update Gradle dependency: com.shopify:checkout-sheet-kit → com.shopify:checkout-kit
   • Update all imports: com.shopify.checkoutsheetkit.* → com.shopify.checkoutkit.*
   • Update ProGuard rules: -keep class com.shopify.checkoutsheetkit.** → com.shopify.checkoutkit.**

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Before you merge

Important

• I've added tests to support my implementation
• I have read and agree with the Contribution Guidelines
• I have read and agree with the Code of Conduct
• I've updated the relevant platform README (swift/README.md and/or android/README.md)

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Releasing a new Swift version?

• I have bumped the version in swift/ShopifyCheckoutSheetKit.podspec
• I have bumped the version in swift/Sources/ShopifyCheckoutSheetKit/ShopifyCheckoutSheetKit.swift
• I have updated swift/CHANGELOG.md
• I have updated the SwiftPM/CocoaPods version snippets in swift/README.md (major version only)

Releasing a new Android version?

• I have bumped the versionName in android/lib/build.gradle
• I have updated android/CHANGELOG.md
• I have updated the Gradle/Maven version snippets in android/README.md

Tip

See the Contributing documentation for the full release process per platform.

[tiagocandido]

• Add ECP support to Android Checkout Kit #21
• Rename occurrences of CSK to Checkout Kit #10 👈 (View in Graphite)
• Restructure for the monorepo setup #9
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

[Juanita-Dash]

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Review assisted by pair-review

[Juanita-Dash]

LGTM