System Design

• principles

• (non)functional requirements
• users, team, time, budget
• OSS / priv
• perf tradeoffs, data extremities
• platforms
  • Android / iOS
  • macOS / Windows / visionOS
  • tvOS / Web / (Skia)
  • Android TV / horizonOS / VegaOS

• @lavamoat/allow-scripts
• Yarn 4 / pnpm / bun / npm + (workspaces) + (Turborepo)
• TypeScript, RN / Ignite / Nx / Expo
• RN 0.83 (React 19.2)
• JSC / V8 / Hermes / (Hermes V1) / (Static Hermes)
• old arch / new arch (libs)
• Nitro / Turbo
• Metro / (Re.Pack) / (rn-esbuild)
• @lavamoat/rn-lockdown
• StrictMode > Profiler > App
• Storybook / Cosmos / Design Mode
• @react-navigation/native-stack+(static/dynamic), rn-reanimated(worklets)+, rn-screens+, rn-safe-area-context
  • rn-gesture-handler+, rn-pager-view+, rn-edge-to-edge, rive-rn+, {rn-nitro,expo}-haptics
• View / ScrollView, SectionList / FlatList, FlashList / LegendList / (ShadowList)
• fetch+/Axios+, rn-keychain+/expo-secure-store+, rn-app-auth+/expo-auth-session+
• RTK(Query), redux-persist, rn-mmkv+ / Zustand, tanstack query / Zustand, apollo / urql
• WebSocket(new/socket.io-client) / WebRTC(rn-) / RPC(t/o/g/json/ocap)
• @rn-async-storage / rn-mmkv+, SQLite / WatermelonDB, MongoDB Realm / PouchDB
• rn-fast-image+ / expo-image+
• {rn,expo}-video+(rn-video-cache)
• {rn,expo}-fs+
• rn-i18n / rn-localize / expo-localization, I18n-js / react-intl / react-i18next
• @rn-firebase / OneSignal, invertase/notifee / wix/rn-notifications
• @stripe/stripe-rn+ / rn-iap+
• Linking / Branch.io / AppsFlyer
• rn-vision-camera+
• langchain / TanStack AI (Vercel AI SDK) / callstackincubator/ai+
• sentry-rn
• oblador/rn-perf / reassure / shopify/rn-perf
• GHA, BitRise / (fastlane), eslint, prettier, husky, jest, maestro / detox / appium, rn-owl / loki
• renovate(pin) / dependabot, depcheck / knip / dependency-cruiser, @lavamoat/git-safe-dependencies
• CodePush / Expo EAS
• GitHub Copilot / OpenAI Codex / Claude Code / Cursor
• decision records

Navigation

UI Components

Which lib?

Dev machine setup

Performance

AI-CLI-agents