/**
 * Stderr-only logging utility.
 *
 * ALL output uses console.error() to write to stderr exclusively.
 * This prevents contamination of stdout, which is reserved for
 * MCP JSON-RPC messages over the stdio transport.
 *
 * NEVER use console.log() anywhere in this project.
 */
export declare const logger: {
    info: (...args: unknown[]) => void;
    warn: (...args: unknown[]) => void;
    error: (...args: unknown[]) => void;
    debug: (...args: unknown[]) => void;
};