export type HeadScan = {
    firstTimestampMs?: number;
    isClearRoll: boolean;
};
export type SessionRollTracker = {
    gather(currentSessionIds: string[]): Promise<Map<string, string>>;
};
export declare function createSessionRollTracker(options?: {
    home?: string;
    claudeConfigDir?: string;
    scanIntervalMs?: number;
}): SessionRollTracker;
export declare function scanTranscriptHead(head: string): HeadScan;
export declare function clearRollHeadVerdict(head: string): boolean;