rn-fundamentalslisted

# rn-fundamentals — foundational rules for React Native + Expo This skill is the prerequisite read for any RN/Expo work. It sets the four non-negotiables and points you to deeper concept material when needed. ## The 4 non-negotiables 1. **Expo managed workflow** is the default. Bare workflow / `react-native init` only if there is a documented native dependency Expo cannot wrap. 2. **Latest stable Expo SDK** `[VERIFY]` at bootstrap time, with **New Architecture ON** (`newArchEnabled: true` in `app.json` `[VERIFY]` — this key/location can move between SDKs). Hermes is the default JS engine — leave it on. 3. **TypeScript** is mandatory. Template `blank-typescript` `[VERIFY]`. `tsconfig.json` extends `expo/tsconfig.base` `[VERIFY]`. 4. **npm** is the package manager (matches Expo defaults and `npx create-expo-app` `[VERIFY]`). No Yarn, no pnpm in this set. ## Source of truth (Expo) This skill set (rn-fundamentals + its 6 siblings: rn-data-fetching, rn-expo-router, rn-backend, rn-push-notifications, rn-publishing-payments, rn-animations-gestures) encodes the **workflow and opinionated stack choices** — Expo managed, New Architecture on, TanStack Query, Reanimated 4, and so on. It is NOT a frozen copy of the Expo/RN API, and it goes stale every time a new SDK ships. For anything sensitive to the current Expo SDK — exact API shapes, CLI commands and flags, config-plugin options, deprecations, EAS behavior — do not trust this skill's wording blindly. In priority order, the auth