# reactivity-store (RStore) > AI-friendly index of the RStore documentation site. > RStore is a React state management library powered by Vue's reactivity system (@vue/reactivity). > Direct state mutation → automatic UI updates; middleware for persistence/DevTools; TypeScript-first. ## Key concepts - [What is RStore?](/what) - [Why RStore?](/why) - [Installation](/install) ## Core APIs - [createStore](/createStore) - [createState](/createState) - [createStoreWithComponent (deprecated)](/createStoreWithLifeCycle) - [Subscriptions](/subscribe) - [Reactive Hooks](/reactiveHook) ## Examples - [Use Cases](/use-cases) - [TodoList](/todoList) ## Reference - [API Reference](/api-reference) - [AI Guide](/ai) ## Legal - Released under the MIT License.