export declare const ACTIVITY_STAGES: readonly ["contextualizing", "compacting_content", "searching_docs", "reviewing_results", "preparing_docs", "searching_web", "writing_answer", "checking_sources", "completed", "failed", "interrupted"];
export type ActivityStage = (typeof ACTIVITY_STAGES)[number];
export type ActivityState = 'started' | 'completed' | 'failed';
export interface ActivityEvent {
    type: 'status';
    version: 1;
    requestId: string;
    sequence: number;
    stage: ActivityStage;
    state: ActivityState;
    detail: {
        searchRound?: number;
        documentCount?: number;
        retryable?: boolean;
    };
}
export declare const ACTIVITY_LABELS: Record<ActivityStage, string>;
export declare const ACTIVITY_COMPLETED_LABELS: Partial<Record<ActivityStage, string>>;
export declare const ACTIVITY_SEARCH_AGAIN_LABELS: {
    searching_docs_again: string;
    searching_docs_again_completed: string;
};
/** Project only the closed, bounded public contract; never render server prose. */
export declare function parseActivity(value: any): ActivityEvent | undefined;