import { execFileSync } from 'node:child_process';
export type ScreenLockState = 'locked' | 'unlocked' | 'unknown' | 'unsupported';
/** 解析 macOS IORegistry 的控制台会话锁屏字段。 */
export declare function parseMacScreenLock(output: string | Buffer): Exclude<ScreenLockState, 'unsupported'>;
/** 在任务完成时读取当前锁屏状态；探测失败返回 unknown，非 macOS 明确 unsupported。 */
export declare function detectScreenLock(options?: {
    platform?: NodeJS.Platform;
    execFile?: typeof execFileSync;
}): ScreenLockState;
/** macOS 探测异常时宁可多通知一次；不支持的平台不会把 locked_only 退化成 always。 */
export declare function shouldNotifyForLockState(notifyWhen: 'locked_only' | 'always', lockState: ScreenLockState): boolean;
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