/**
 * File-based session lock to prevent duplicate relay sessions.
 *
 * When multiple MCP server processes start simultaneously (common in Claude Code),
 * this lock prevents each from creating a separate relay session (rate limit:
 * max 10 sessions/IP/10min).
 *
 * Lock file location: <config_dir>/mcp/relay-session-<server>.lock
 */
export declare function setLockDir(path: string | null): void;
export interface SessionInfo {
    sessionId: string;
    relayUrl: string;
    createdAt: number;
}
export declare function acquireSessionLock(serverName: string, maxAgeMs?: number): Promise<SessionInfo | null>;
export declare function writeSessionLock(serverName: string, info: SessionInfo): Promise<void>;
export declare function releaseSessionLock(serverName: string): Promise<void>;
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