export type AnnounceOptions = {
    /** Interrupt the user immediately (role="alert"). Default polite. */
    assertive?: boolean;
};
/** Announce `message` to screen readers. Empty messages are ignored. */
export declare function announce(message: string, options?: AnnounceOptions): void;
/** Test helper: tear the shared live regions down. */
export declare function _resetLiveRegions(): void;