React Native / Expo Patterns Practical patterns for building production React Native apps with Expo. Covers navigation, state, data fetching, lists, styling, and native APIs. Pairs with the ruleset: rules say what to enforce, this skill shows how . Libraries named below (NativeWind, Zustand/Jotai, TanStack Query) are common, well-established options shown for illustration — the patterns matter more than the specific package, and any equivalent works. Zod is used for validation to stay consistent with ECC's existing rules. These patterns assume the managed Expo workflow (Expo Router, EAS, modu…