revenuecat-paywall: display a RevenueCat paywall

Use this skill when the user wants to show a paywall that is built and configured in the RevenueCat dashboard, using the native RevenueCatUI components. This skill does not cover building a custom paywall from scratch. For that, use revenuecat-purchase-flow (when available) and Purchases.getOfferings(…) directly.

Prerequisite: integrate-revenuecat has already run. Purchases.configure(…) must succeed before a paywall can load.

1. Detect the platform

Inspect the working directory and pick the first match, from top to bottom:

1. React Native: package.json has a react-native-purchases entry, or react-native as a dependency. react-native-purchases-ui is the paywall package. Read platforms/react-native.md. If expo is also a dependency, note it as an Expo project.
2. Flutter: pubspec.yaml exists at the project root. The paywall package is purchases_ui_flutter. Read platforms/flutter.md.
3. Kotlin Multiplatform: build.gradle.kts contains a kotlin { … } multiplatform source sets block, or depends on com.revenuecat.purchases:purchases-kmp*. The paywall module is purchases-kmp-ui. Read platforms/kmp.md.
4. Android (native): build.gradle(.kts) applies com.android.application (and is not KMP). The paywall dependency is com.revenuecat.purchases:purchases-ui. Read platforms/android.md.
5. iOS (native): Package.swift, *.xcodeproj, *.xcworkspace, or Podfile at the project root. The paywall product is RevenueCatUI. Read platforms/ios.md.

If several match (e.g. an ios/ folder inside a Flutter project), pick the outermost project, the one that owns the build. If still ambiguous, ask the user which platform they want to configure.

2. Shared concepts (all platforms)

• Paywalls require an Offering with a paywall attached in the RevenueCat dashboard. The SDK pulls offerings via getOfferings(). If no offering has a paywall configured, RevenueCatUI falls back to a default paywall layout, which is not what you want in production.
• Offering vs. entitlement. Users purchase a product through a package in an offering. Access is granted via an entitlement (typically "premium" or "pro"). Gate premium features on the entitlement, not on the offering.
• Three presentation patterns:
  • (a) First launch modal for users without the entitlement, typically driven by a "present if needed" helper that checks the entitlement and only shows the paywall when missing.
  • (b) Gated premium screen. The user taps a premium feature and the paywall opens before the screen loads.
  • (c) Conditional present on a CTA tap, such as an "Upgrade" button in settings.
• RevenueCatUI owns the purchase flow. Do not call Purchases.purchase(…) manually alongside a RevenueCatUI paywall. The paywall calls it internally. Listen for the dismiss or purchase completed callback to react in app code.
• Close button is opt in on most platforms. Pass displayCloseButton = true (iOS / Flutter / RN) or setShouldDisplayDismissButton(true) (Android / KMP) when the paywall is presented modally and the user needs a way out. Skip it when presenting behind a sheet with its own grabber, or when wrapping the paywall in a navigation controller.
• If the app needs a fully custom UI, do not use this skill. Call Purchases.getOfferings() and render your own components. RevenueCatUI is only for dashboard templated paywalls.

3. Implementation

Read the platform file that matches detection:

• platforms/ios.md
• platforms/android.md
• platforms/kmp.md
• platforms/flutter.md
• platforms/react-native.md

Each platform file is self contained: install command, exact snippet to present the paywall, and the callback shape you listen to.

4. Verify

Do not claim the integration is complete until:

1. The project builds on the target platform.
2. The app launches, the code path that presents the paywall runs, and the paywall UI renders with the template configured in the dashboard (not the default fallback layout).
3. Tapping a package and completing a sandbox purchase dismisses the paywall and fires the purchase completed callback (or, for imperative APIs, resolves with a PURCHASED result).
4. Closing the paywall without purchasing fires the dismiss / cancelled callback.

If the paywall shows the default fallback layout instead of your template, the offering does not have a paywall attached in the dashboard. Fix this in the dashboard, then retry.