/**
 * 结构化日志。人类可读格式输出，按级别区分。
 *
 * 单 bot：2026-03-31 18:08:46 [INFO] [pipeline] session recovered chatId=c1
 * 多 bot：2026-03-31 18:08:46 [INFO] [NiuBot/pipeline] session recovered chatId=c1
 */
type LogLevel = "debug" | "info" | "warn" | "error";
export declare function setLogLevel(level: LogLevel): void;
/** 创建 logger。botName 可选，设置后输出 [botName/module] 格式 */
export declare function createLogger(module: string, botName?: string): {
    debug: (msg: string, data?: Record<string, unknown>) => void;
    info: (msg: string, data?: Record<string, unknown>) => void;
    warn: (msg: string, data?: Record<string, unknown>) => void;
    error: (msg: string, data?: Record<string, unknown>) => void;
};
export {};