“React Native”

Builds TanStack Query server state over an ApiClient - validated responses, keys, retries, optimistic writes, offline.

Evaluates code against Apple's App Store Review Guidelines.

Creates a new Expo app from empty - SDK 57 stack, Expo Router, root configs, gates, variants, icons - proven by a checker.

Puts all visible text in react-intl catalogs - semantic keys, CLDR plurals, Intl polyfills, parity.

Generates level tables proven winnable by a solver or witness bot: par, stars, pack unlocks, a daily level.

Enforces a11y labels, 44pt targets, 200% text, VoiceOver, TalkBack.

Builds AdMob ads behind a port - banners, interstitials, rewarded, UMP consent then ATT, pacing, ADS_MODE test IDs.

Gates analytics on opt-in consent: no SDK before a yes, typed events without personal data, ATT.

Places app code in the src/ layout and checks import boundaries: one-way zones, pure core, ports with fakes, one composition root.

Prevents silent async bugs: effect races, stale results, lost promises, leaked listeners and timers, AbortSignal gaps.

Builds SFX and haptics behind ports.

Builds sign-in - tokens in expo-secure-store, shared refresh, protected routes, OAuth PKCE, Apple sign-in.

Builds expo-background-task jobs: idempotent, budgeted runs.

Turns canvas taps, swipes, drags and aim into typed intents: one gesture module, hit-testing on the drawn layout.

Builds GitHub Actions CI for Expo apps - verify on every PR, SHA-pinned actions, pinned runners and Node, device lanes, manual EAS releases.

Gates test-only code behind one literal TEST_ONLY switch: debug menu, debug link, simulated clock and offline.

Structures a design system: two-tier tokens, contrast-proven light/dark palettes, the theme provider, makeStyles, text roles, fonts.

Proves built screens match approved design references (iOS, Android, light/dark, RTL) per element.

Keeps ios/ and android/ generated from app.config.ts and tested config plugins.

Moves an Expo app to the next SDK and Xcode/Android toolchain in one proven commit - expo install --fix, overrides, breaking changes.

Tunes game difficulty with seeded headless bots: sim reports, balance bands, tuning knobs, a fun-in-seconds test.

Hosts a game module through one typed seam: game screen, pause, undo, hints, a rescue, saved runs, results.

Guards data and pixel goldens - *.golden.test.ts snapshots, append-only [contract] entries, Skia tolerance, jest -u rules.

Shows, picks and stores images - expo-image, picker, camera, a media store.