/**
 * Custom error types for Qwen OAuth Plugin
 */
export declare class QwenAuthError extends Error {
    code: string;
    recoverable: boolean;
    userMessage?: string | undefined;
    constructor(message: string, code: string, recoverable?: boolean, userMessage?: string | undefined);
}
export declare class NetworkError extends QwenAuthError {
    constructor(message: string, userMessage?: string);
}
export declare class TokenExpiredError extends QwenAuthError {
    constructor(message?: string);
}
export declare class RateLimitError extends QwenAuthError {
    constructor(message: string, waitTimeMs?: number);
}
export declare class AuthorizationError extends QwenAuthError {
    constructor(message: string);
}
export declare class ValidationError extends QwenAuthError {
    constructor(message: string, field?: string);
}
export declare class DeviceFlowError extends QwenAuthError {
    errorType?: string | undefined;
    constructor(message: string, errorType?: string | undefined);
}
export declare class QwenTokenRefreshError extends QwenAuthError {
    constructor(message: string);
}
/**
 * Type guard to check if error is recoverable
 */
export declare function isRecoverableError(error: unknown): boolean;
/**
 * Get user-friendly error message
 */
export declare function getUserMessage(error: unknown): string;
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