export type UseModalStackResult = {
    /**
     * How many modals are in front of this one (0 = frontmost)
     */
    readonly depthFromFront: number;
    /**
     * Current number of open modals in the stack
     */
    readonly stackSize: number;
    /**
     * The stack size when this modal opened (stable after open, useful for one-time decisions)
     */
    readonly stackSizeAtOpen: number;
};
/**
 * Hook to track this modal's position in the stack of open modals.
 * Returns the depth from front (0 = frontmost, 1 = one modal in front, etc.)
 *
 * This hook is aware of modals across bundle boundaries (host + Iris apps)
 * by listening for host modal count changes via postMessage.
 *
 * @param isOpen - Whether the modal is currently open
 */
export declare const useModalStack: (isOpen: boolean) => UseModalStackResult;