import type { ComputedRef, MaybeRefOrGetter } from 'vue';
type ObjectLiteral = {
    updatedAt: string | Date | undefined;
};
/**
 * Track an entity's `updatedAt`. Pass a ref or getter
 * (e.g. `() => props.entity`) — a plain value is accepted but yields a
 * static computed: reading `props.entity` at the call site captures the
 * object once, so a later prop replacement never triggers watchers.
 */
export declare function useUpdatedAt<T extends ObjectLiteral>(input?: MaybeRefOrGetter<T | null | undefined>): ComputedRef<string | Date | undefined>;
export {};
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