/** Base class for errors thrown by the Quack SDK. */
export declare class QuackError extends Error {
    /** Create a Quack SDK error. */
    constructor(message: string, options?: ErrorOptions);
}
/** Error raised for client-side protocol, transport, URI, or state failures. */
export declare class QuackProtocolError extends QuackError {
    /** Create a protocol/client-state error. */
    constructor(message: string, options?: ErrorOptions);
}
/** Error raised when the server returns a Quack error response. */
export declare class QuackServerError extends QuackError {
    /** Server-provided error message. */
    readonly serverMessage: string;
    /** Create a server error from a Quack error response. */
    constructor(serverMessage: string);
}
/** Error raised for known DuckDB serialization paths outside current support. */
export declare class QuackUnsupportedTypeError extends QuackProtocolError {
    /** Create an unsupported-type error. */
    constructor(message: string, options?: ErrorOptions);
}