TanStack Query Best Practices TanStack Query (formerly React Query) handles server-state caching, background updates, and stale-data management out of the box. This skill covers v5 patterns and APIs — v5 introduced several breaking changes from v4 that older examples online still don't reflect. Core Principles - Use TanStack Query for all server state management and data fetching; it is not a general client-state manager — keep client-only state in /context/a state library instead - Minimize and for server data; favor TanStack Query's built-in state management - Every query needs a stable, se…