import type { AgentConfig } from '../types/index.js';
/**
 * Save agent configuration.
 */
export declare function saveConfig(config: AgentConfig): void;
/**
 * Load agent configuration.
 */
export declare function loadConfig(): AgentConfig | null;
/**
 * Check if agent is configured.
 */
export declare function isConfigured(): boolean;
/**
 * Save daemon PID.
 */
export declare function savePid(pid: number): void;
/**
 * Read daemon PID.
 */
export declare function readPid(): number | null;
/**
 * Remove daemon PID file.
 */
export declare function removePid(): void;
/**
 * Check if daemon process is running.
 */
export declare function isDaemonRunning(): boolean;
/**
 * Atomically claim single-daemon-per-machine. Returns true if we are now the only
 * daemon (pidfile written with our pid), false if another LIVE daemon already holds
 * it. Race-safe: create-exclusive (O_EXCL); on an existing file we check pid
 * liveness and reclaim a stale one. This is what prevents two daemons from running
 * at once and fighting over the WS connection (the cause of 1006 flapping).
 */
export declare function acquireSingleInstanceLock(): boolean;