/**
 * Shared HTTP retryability constants.
 *
 * Centralises the status-code lists that were duplicated across
 * httpRetryHandler, neurolink.ts, fileDetector.ts, and errorHelpers.
 */
/** Server-side and rate-limiting codes worth retrying. */
export declare const RETRYABLE_HTTP_STATUS_CODES: readonly number[];
/** Client-error codes where retrying is pointless. */
export declare const NON_RETRYABLE_HTTP_STATUS_CODES: readonly number[];
/** Check whether an HTTP status code is retryable. */
export declare function isRetryableStatusCode(code: number): boolean;
/** Check whether an HTTP status code is non-retryable. */
export declare function isNonRetryableStatusCode(code: number): boolean;