/**
 * Base API Error class
 */
export declare class APIError extends Error {
    status?: number | undefined;
    code?: string | undefined;
    data?: any | undefined;
    constructor(message: string, status?: number | undefined, code?: string | undefined, data?: any | undefined);
}
/**
 * Authentication/Authorization error (401, 403)
 */
export declare class AuthError extends APIError {
    constructor(message: string, status?: number, code?: string, data?: any);
}
/**
 * Validation error (400, 422)
 */
export declare class ValidationError extends APIError {
    constructor(message: string, status?: number, code?: string, data?: any);
}
/**
 * Resource not found error (404)
 */
export declare class NotFoundError extends APIError {
    constructor(message: string, status?: number, code?: string, data?: any);
}
/**
 * Rate limit error (429)
 */
export declare class RateLimitError extends APIError {
    retryAfter?: number | undefined;
    constructor(message: string, retryAfter?: number | undefined, status?: number, code?: string, data?: any);
}
/**
 * Network/connection error
 */
export declare class NetworkError extends APIError {
    originalError?: any | undefined;
    constructor(message: string, originalError?: any | undefined);
}
/**
 * Extract error message from unknown error
 */
export declare function getErrorMessage(error: unknown): string;
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