Store instance

Every store — however it was defined — has the same built-in members alongside its own state/getters/actions:

Member	Signature	See
$id	string	the id passed to defineStore()
$state	property, get/set	State
$patch(partialOrFn)	(partial: DeepPartial<S>) => void or (fn: (state: S) => void) => void	State
$reset()	() => void — schema stores only; throws for hooks stores	State
$subscribe(callback, options?)	(callback: (mutation, state: S) => void, options?: { detached?: boolean }) => () => void	Subscriptions & Action Hooks
$onAction(callback)	(callback: (context: ActionListenerContext) => void) => () => void	Subscriptions & Action Hooks
$dispose()	() => void	stops the store's internal reactivity and removes it from the Nekuta instance's registry — a later call to the same store definition rebuilds it fresh

$subscribe()/$onAction() both return an unsubscribe function.

SubscriptionCallbackMutation

The first argument $subscribe()'s callback receives:

type SubscriptionCallbackMutation<S> = {
    type: 'direct' | 'patch object' | 'patch function';
    storeId: string;
};

ActionListenerContext

The single argument $onAction()'s callback receives:

type ActionListenerContext = {
    name: string; // the action's name
    store: StoreGeneric;
    args: unknown[]; // the arguments the action was called with
    after: (callback: (result: unknown) => void) => void;
    onError: (callback: (error: unknown) => void) => void;
};