import { type ReactNode } from "react";
/**
 * Seed the initial open state of every timeline collapsible below this node.
 * Intended for screenshot/test instrumentation only; absent by default.
 */
export declare function DisclosureDefaultsProvider({ defaultOpen, children, }: {
    defaultOpen: boolean;
    children: ReactNode;
}): import("react").JSX.Element;
/**
 * The forced initial-open seed from an ancestor {@link DisclosureDefaultsProvider},
 * or `undefined` when none is mounted (the inert, app-default case).
 */
export declare function useForcedDefaultOpen(): boolean | undefined;