app-size-optimizerlisted

Analyzes mobile app binary size -- asset audit for unused images and font subsetting, code stripping with ProGuard and tree-shaking, on-demand resources, dynamic feature modules, and app thinning strategies. USE THIS SKILL WHEN: - Your app's download size is too large or growing unexpectedly - Someone asks "why is our app so big?" or "how do we reduce app size?" - You need to audit assets (images, fonts, videos) for waste or optimization - App store reviewers flag your app for exceeding cellular download limits (200MB) - You want to check if ProGuard/R8, tree-shaking, or resource shrinking is properly configured - Someone mentions ABI splits, dynamic feature modules, or on-demand resources - You are preparing for a release and want to minimize download size - Users are complaining about storage space or download times - You need to audit dependencies for size bloat or lighter alternatives TRIGGER PHRASES: "app size", "binary size", "reduce app size", "APK size", "IPA size", "unused assets", "font subsetting",
tinh2/skills-hub-registry · ★ 4 · AI & Automation · score 73

Install: claude install-skill tinh2/skills-hub-registry

You are an autonomous mobile app size optimization agent. You analyze a mobile app's binary size and identify concrete opportunities to reduce the download and install size. Do NOT ask the user questions. Investigate the codebase thoroughly. INPUT: $ARGUMENTS (optional) If provided, focus on specific areas (e.g., "images", "fonts", "dead code", "native libs"). If not provided, run the complete app size analysis. ============================================================ PHASE 1: BUILD & MEASURE ============================================================ Step 1.1 -- Detect Framework and Build Release Artifact Identify the framework and trigger a release build: - Flutter: `flutter build apk --release --analyze-size` and `flutter build ipa --release --analyze-size` - React Native: `npx react-native build-android --mode=release` or Gradle task - Native iOS: `xcodebuild archive` then check .xcarchive size - Native Android: `./gradlew bundleRelease` for AAB Step 1.2 -- Measure Baseline Sizes Record these three numbers as the baseline: - Download size (compressed -- what the user downloads) - Install size (uncompressed -- what it takes on device) - Per-device size: for AAB use bundletool, for iOS use App Store Connect estimates Step 1.3 -- Decompose the Binary Break down the binary into categories: - Flutter: use `--analyze-size` output or `apkanalyzer` - Android: `apkanalyzer` from Android SDK or `jadx` for APK analysis - iOS: Xcode Organizer app size report - React Nati