export declare const ARCHIVE_RETENTION_MS: number;
export interface ArchiveResult {
    readonly archivedCompleted: number;
    readonly archivedInFlight: number;
    readonly gcDeleted: number;
}
/** Build the canonical archive dir for a given session + slice id. */
export declare function archiveDir(projectRoot: string, sessionId: string, sliceId: string): string;
/** Build the in-flight subdir (records not yet disposed). */
export declare function inFlightArchiveDir(projectRoot: string, sessionId: string, sliceId: string): string;
/**
 * Archive the current `.peaks/_sub_agents/<sid>/` tree under
 * `<archiveDir>` (per the sliceId), separating completed vs in-flight.
 * Then run the 30-day GC over the archive dir.
 */
export declare function archiveSubAgentRecords(projectRoot: string, options: {
    sessionId: string;
    sliceId: string;
    now?: () => Date;
}): ArchiveResult;