/**
 * SSE Error Handler for request-executor
 *
 * Extracts and normalizes SSE wrapper errors from responses.
 */
export type SseWrapperErrorInfo = {
    message: string;
    errorCode?: string;
    statusCode?: number;
    retryable: boolean;
};
/**
 * Extract SSE wrapper error from payload with depth-limited recursion
 */
export declare function extractSseWrapperError(payload: Record<string, unknown> | undefined): SseWrapperErrorInfo | undefined;