React-query version 1.0 introduced significant changes to its API, including enhancements to query keys and functions, updated useQuery Hook, and a revamped queryCache system that refines state management, caching, and lifecycle operations. The update allows query keys to incorporate more serializable members for greater query detail and mandates that all query key items be passed into query functions, marking a breaking change from previous versions. The new version also replaces the paginated argument in the useQuery Hook with two new Hooks: usePaginatedQuery and useInfiniteQuery. Additionally, the queryCache now integrates methods like prefetchQuery and refetchQueries to streamline data fetching and caching, with the older independent Hook methods being deprecated. The introduction of react-query-devtools offers a more efficient way to monitor query operations, enabling developers to track query states, view data, and manage cache activities easily. These updates, alongside the devtools, aim to simplify app development and debugging, enhancing the overall developer experience.