import { LoggerConfig } from './config.js';
export type loggerFunction = (...messages: unknown[]) => void;
export type Logger = {
    debug: loggerFunction;
    warn: loggerFunction;
    info: loggerFunction;
    error: loggerFunction;
};
/**
 * Get a Logger instance for log messages.
 *
 * Supports two transports:
 * - Console: human-readable `timestamp [level]: message key=value ...` format, always active.
 * - JSON file (`logs/app.json`): full structured JSON for log aggregators; enabled via `config.json`.
 */
export declare const getLogger: (config: LoggerConfig) => Logger;