export interface RunnerSessionFile {
    baseUrl: string;
    attachToken: string;
    runId: string;
    pid: number;
    startedAt: string;
    endedAt?: string;
    status?: string;
}
export declare function writeSessionFile(filePath: string, session: RunnerSessionFile): void;
export declare function readSessionFile(filePath: string): RunnerSessionFile | string;