export interface LockData {
    pid?: number;
    port: number;
    profileDir: string;
    browserPath: string;
    mode: "session" | "attach";
    appName?: string;
    pending?: boolean;
    timestamp?: number;
    fingerprint?: {
        launchTimestamp: number;
        userAgent?: string;
        cdpVersion?: string;
    };
}
export declare function getLockFilePath(appName?: string): string;
export declare function getMutexFilePath(appName?: string): string;
declare function acquireMutex(appName?: string): Promise<() => Promise<void>>;
export declare function writeLockSafe(data: LockData, appName?: string): Promise<void>;
export declare function writeLock(data: LockData, appName?: string): Promise<void>;
export declare function readLock(appName?: string): LockData | null;
export declare function clearLock(appName?: string): void;
/**
 * Safe variant: only clears the lock if it was written by THIS process (process.pid).
 * Prevents a second MCP server instance from wiping the first instance's browser lock
 * during its retry loop, which would allow a race condition where two browsers spawn.
 */
export declare function clearLockIfOwned(appName?: string): void;
export declare function isProcessRunning(pid: number): boolean;
/**
 * Two-factor lock validation: PID alive AND port accepting TCP connections.
 * Prevents PID-reuse false-positives after a crash.
 */
export declare function isLockValid(lock: LockData): Promise<boolean>;
export declare function isLockPending(lock: LockData): boolean;
export { acquireMutex };