custom-codex-skills

Apply consistent React Native + Expo conventions for project structure, Expo Router navigation, theming primitives, icons, sqlite data patterns, safe area handling, and bun/bunx tooling. Use when adding or updating screens, components, navigation, data, or dependencies in Expo/React Native apps so work matches these practices.

Guidance for building, refactoring, and debugging Expo + React Native apps (including Expo Router). Use when wiring screens/layouts, navigation (tab/stack) scaffolding with `_layout.tsx` per group, avoiding unwanted redirects in `app/index.tsx`, theming, data fetching with React Query/fetch, Expo module usage, offline handling, and running local Expo tooling (install/start/lint).

Install and wire @tanstack/react-query in Expo/React Native apps (providers, query client, fetch patterns, and screen usage). Use when adding React Query to a project or extending data fetching patterns.

Create and use iOS simulator development builds with EAS for Expo/React Native apps. Use when setting up simulator-only profiles, building, installing, and running dev clients on iOS simulators.