React

Wave 1 adapter over Store via useSyncExternalStore. Full API docs land after the package ships; the binding rule below is normative now.

useSyncExternalStore (normative)

Store.get() / Stopwatch.get() returns the live value. React requires getSnapshot to be stable between notifications.

@watchstop/react MUST NOT pass live store.get as useSyncExternalStore’s getSnapshot.

Cache the value received via subscribe (or a versioned snapshot updated only in the listener). getSnapshot returns that cached snapshot. SSR / server snapshot may use a one-shot get() when the hook mounts.

Do not use useState + manual subscribe as the primary path.

See Store and Agents.