import type { AgChatStatus } from '../types.js';
export interface StatusAnnouncementLabels {
    /** Polite, on the transition into `submitted`. Default "Sending". */
    sending?: string | undefined;
    /** Assertive, on the transition into `error`. Default "Response failed". */
    error?: string | undefined;
}
/**
 * REQ-SURF-113 (AI §4.5): chat-status transitions announce once each through
 * the MAT announcer — `submitted` → "Sending" (polite), `error` (assertive).
 * The initial status is not announced; only changes are. Other transitions
 * (`streaming`, `ready`) are silent: the streamed text has its own policy.
 */
export declare function useStatusAnnouncements(status: AgChatStatus, labels?: StatusAnnouncementLabels): void;
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