import type { OsBackend, ScheduleJob } from "./types.js";
export interface DetectOptions {
    platform?: NodeJS.Platform;
    hasSystemctl?: boolean;
}
/** Pick the native backend for this host. Inputs are injectable for testing. */
export declare function detectOsBackend(opts?: DetectOptions): OsBackend;
export interface InstallResult {
    backend: OsBackend;
    installed: boolean;
}
/**
 * Install the OS-scheduler entry for a job. On launchd, a cron expression that
 * StartCalendarInterval cannot express falls back to crontab — the chosen
 * backend is returned so the caller can persist it on the job.
 */
export declare function installJob(job: ScheduleJob, logsDir: string, stateRoot: string, opts?: DetectOptions): InstallResult;
/** Uninstall by the job's recorded backend. Idempotent — never throws if absent. */
export declare function uninstallJob(id: string, backend: OsBackend): void;
export declare function getInstalledStatus(id: string, backend: OsBackend): boolean;