export declare function historyActivePath(projectRoot: string): string;
export declare function historyArchivePath(projectRoot: string): string;
/**
 * Rotate the active history file if it exceeds maxActiveLines.
 *
 * When the active file has more than maxActiveLines non-empty lines,
 * the oldest (count - maxActiveLines) lines are appended to the archive
 * and the active file is atomically rewritten with the newest maxActiveLines
 * lines via temp-file + rename.
 *
 * Pass maxActiveLines from config; callers must NOT call loadConfig here
 * (loadConfig throws when no bober.config.json exists). Default: 2000.
 *
 * No-op when the active file does not exist or has <= maxActiveLines entries.
 */
export declare function rotateIfNeeded(projectRoot: string, maxActiveLines?: number): Promise<void>;
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