import type { FieldValues, UseFormReturn } from 'react-hook-form';
/**
 * Options for {@link useExternalSync}.
 *
 * @category Hooks
 */
export interface UseExternalSyncOptions {
    /**
     * If true, preserve dirty fields across an external reset.
     * Defaults to false (matches the common "I switched contexts; discard edits"
     * intent).
     */
    keepDirty?: boolean;
}
/**
 * Reset a form's values when an externally-supplied source object's reference
 * changes; preserve in-progress edits while the reference is stable.
 *
 * Adopters with mismatched source-vs-form shapes pass a `toValues` projection.
 *
 * @example
 * ```tsx
 * const { form } = useZodForm(schema, { defaultValues: toValues(node) });
 * useExternalSync(form, node, toValues);
 * ```
 *
 * @category Hooks
 */
export declare function useExternalSync<TSource, TValues extends FieldValues>(form: UseFormReturn<TValues>, source: TSource, toValues: (source: TSource) => TValues, options?: UseExternalSyncOptions): void;
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