“react”

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.

Schedules on-device reminders with expo-notifications: rows as truth, one idempotent sync, DST-safe triggers, Android channels.

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

Catalogs each animation as a Reanimated 4 moment.

Names files, routes, exports, hooks, booleans, kinds, testIDs, message keys, app ids and env vars.

Writes New Architecture native code in typed local Expo modules.

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

Master Autonomous 3D Web Architect and Systems Engineering Skill.

UI/UX design intelligence for web and mobile.

A Canvas is a live React app rendered beside the chat.

Frontend development patterns for React, Angular, state management, performance optimization, and UI best practices.

Assembles Release APKs with Gradle on an AVD started by name (pinned JDK and SDK) and inspects them.

Orders an Expo app's cold start - polyfills, error net, splash hold, storage open, providers, splash release, background flush.

Wires APP_VARIANT builds: per-variant ids, names, icons, schemes, EXPO_PUBLIC_* as public, secrets in EAS/CI, test code out of store bundles.

Adds, upgrades and removes npm packages in Expo apps under a written policy - expo install, exact pins, 7-day release age, script review, licences.

Writes and runs Maestro E2E flows on iOS simulators and Android emulators - testID steps, debug-link setup, screenshot baselines.

Configures EAS Build and Submit: eas.json profiles, remote build numbers, fingerprints, gated store submits.

Draws icons and app art in code - a Skia-path icon set, a brand mark, adaptive icons, splash, store art.