export interface WatchChunk {
    event_type: 'watch_chunk';
    event_at: string;
    position_seconds: number;
    payload: {
        start_seconds: number;
        duration_seconds: number;
    };
}
export declare class WatchChunkAccumulator {
    private chunkStart;
    private lastPosition;
    private pendingChunks;
    startChunk(positionSeconds: number): void;
    tick(positionSeconds: number): void;
    finalizeChunk(): WatchChunk | null;
    drain(): WatchChunk[];
    reset(): void;
}
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