export type QmdRunnerFinishedStore = Map<string, number>;
export declare function getQmdRunnerIntervalMs(platform: string, env: NodeJS.ProcessEnv): number;
export declare function qmdRunnerShouldSkip(options: {
    platform: string;
    env: NodeJS.ProcessEnv;
    nowMs: number;
    lastFinishedAt?: number;
    lockHeld?: boolean;
    fullRefresh?: boolean;
}): boolean;
export declare function isQmdBackgroundLockHeld(home: string, options?: {
    nowMs?: number;
    isProcessAlive?: (pid: number) => boolean;
}): boolean;
export declare function qmdRunnerLastFinishedAt(root: string, store: QmdRunnerFinishedStore): number | undefined;
export declare function recordQmdRunnerFinished(root: string, finishedAt: number, store: QmdRunnerFinishedStore): void;
/**
 * Atomically claim hq-cli's shared background QMD lock. A null result means a
 * lock already exists or the runner could not publish its owner record.
 */
export declare function acquireQmdBackgroundLock(home: string, nowMs?: number): (() => void) | undefined;
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