xstate

SKILL.md

CRITICAL: This skill covers XState v5 ONLY. Do not use v4 patterns, APIs, or documentation. XState v5 requires TypeScript 5.0+.

Actors are independent entities that communicate by sending messages. XState v5 supports:

| State Machine | createMachine() | Complex state logic with transitions | | Promise | fromPromise() | Async operations (fetch, timers) | | Callback | fromCallback() | Bidirectional streams (WebSocket, EventSource) | | Observable | fromObservable() | RxJS streams | | Transition | fromTransition() | Reducer-like state updates |

Helps create XState v5 state machines in TypeScript and React. Use when building state machines, actors, statecharts, finite state logic, actor systems, or integrating XState with React/Vue/Svelte components. Source: seed-hypermedia/seed.

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