PolyBuys

Keep Convex backend changes backwards-compatible so old TestFlight/App Store clients don't crash. Trigger when editing anything under backend/ or convex/, removing/renaming functions or arguments, or changing schema.

Complete guide for building beautiful apps with Expo Router. Covers fundamentals, styling, components, navigation, animations, patterns, and native tabs.

Guidelines for creating API routes in Expo Router with EAS Hosting

Helps understand and write EAS workflow YAML files for Expo projects. Use this skill when the user asks about CI/CD or workflows in an Expo or EAS context, mentions .eas/workflows/, or wants help with EAS build pipelines or deployment automation.

Set up Tailwind CSS v4 in Expo with react-native-css and NativeWind v5 for universal styling

Use when implementing or debugging ANY network request, API call, or data fetching. Covers fetch API, React Query, SWR, error handling, caching, offline support, and Expo Router data loaders (useLoaderData).

Guidelines for upgrading Expo SDK versions and fixing dependency issues

Use Expo DOM components to run web code in a webview on native and as-is on web. Migrate web code to native incrementally.