/**
 * Simple console logger for the OpenRouter Kit library.
 * Allows conditional logging based on debug mode and adding prefixes.
 */
export declare class Logger {
    private debugMode;
    private readonly prefix;
    /**
     * Creates a logger instance.
     * @param options - Configuration object `{ debug?: boolean, prefix?: string }` or a boolean indicating debug state.
     * @param prefix - Optional prefix string (only used if `options` is boolean).
     */
    constructor(options?: {
        debug?: boolean;
        prefix?: string;
    } | boolean, prefix?: string);
    /**
     * Enables or disables debug logging.
     * @param debug - `true` to enable, `false` to disable.
     */
    setDebug(debug: boolean): void;
    /** Checks if debug mode is currently enabled. */
    isDebugEnabled(): boolean;
    /** Logs a debug message (only if debug mode is enabled). */
    debug(message: string | any, ...args: any[]): void;
    /** Logs an informational message (only if debug mode is enabled). */
    log(message: string | any, ...args: any[]): void;
    /** Logs a warning message (only if debug mode is enabled). */
    warn(message: string | any, ...args: any[]): void;
    /** Logs an error message (only if debug mode is enabled). */
    error(message: string | any, ...args: any[]): void;
    /**
     * Creates a new logger instance inheriting the current debug state
     * but with an added prefix segment.
     * @param newPrefix - The additional prefix string.
     * @returns A new Logger instance.
     */
    withPrefix(newPrefix: string): Logger;
}