/** Log levels for the logger. */
export declare enum LogLevel {
    DEBUG = 0,
    INFO = 1,
    WARN = 2,
    ERROR = 3
}
/**
 * Logger interface for ADK.
 */
export interface Logger {
    log(level: LogLevel, ...args: unknown[]): void;
    debug(...args: unknown[]): void;
    info(...args: unknown[]): void;
    warn(...args: unknown[]): void;
    error(...args: unknown[]): void;
    setLogLevel(level: LogLevel): void;
}
/**
 * Sets a custom logger for ADK, or null to disable logging.
 */
export declare function setLogger(customLogger: Logger | null): void;
/**
 * Gets the current logger instance.
 */
export declare function getLogger(): Logger;
/**
 * Resets the logger to the default SimpleLogger.
 */
export declare function resetLogger(): void;
/**
 * Sets the log level for the logger.
 */
export declare function setLogLevel(level: LogLevel): void;
/**
 * The logger instance for ADK.
 */
export declare const logger: Logger;