Tools

macOS cleanup and maintenance CLI (mo): clears caches and logs, fully uninstalls apps, analyzes disk usage, removes project build artifacts and shows system status. Preview deletions with --dry-run; disk analysis and status support JSON output. Needs macOS 12+.

Vercel's React Native and Expo best practices ranked by impact, covering list scrolling performance, Reanimated animations, navigation, UI patterns, state management and monorepo setup. Maintained by Vercel.

Google's official Android agent skills: 25 skills for AGP 9 upgrades, XML-to-Compose migration, Navigation 3, R8 analysis, Play Billing Library upgrades, permissions and intent security, and more. Install with the Android CLI or as a Claude Code plugin.

Google's official Android skill library, targeting areas where models often go wrong: AGP 9 upgrades, XML to Jetpack Compose migration, Navigation 3, R8 analysis, edge-to-edge support and Play Billing Library upgrades.

OpenAI's official Codex plugin for iOS: SwiftUI UI work and refactoring, App Intents, simulator debugging, performance profiling and memory leak hunting, with XcodeBuildMCP built in. Requires macOS and Xcode; Codex only.

Reproduces issues on the Android emulator: installs builds, drives the UI with adb, dumps the UI tree, takes screenshots, captures logcat, and gathers performance evidence with Simpleperf and Perfetto. OpenAI's official Codex plugin; needs the Android SDK.

OpenAI's official iOS skills: SwiftUI patterns and view refactoring, iOS 26 Liquid Glass, App Intents, performance audits with ETTrace sampling, memory leak hunting with memgraph, and simulator debugging. Needs macOS and Xcode; debugging skills rely on XcodeBuildMCP.

Built by Callstack from The Ultimate Guide to React Native Optimization: diagnoses dropped frames, slow startup, bundle size, memory leaks, unnecessary re-renders and janky animations, across both JS and native iOS/Android.