/**
 * What kind of failure an HTTP status represents. The names match the
 * error class each provider throws for it: `TransientLlmError`,
 * `RateLimitLlmError`, `QuotaExhaustedLlmError`,
 * `SchemaValidationLlmError` and `NonRetryableLlmError`.
 */
export type THttpErrorCategory = "transient" | "rate_limit" | "quota_exhausted" | "schema_validation" | "non_retryable";
/**
 * Sort an HTTP error status, plus the structured error code or type
 * from the response body when there is one, into a failure category.
 *
 *   * 500 and above: a server fault, retryable (`transient`).
 *   * 429: `quota_exhausted` when the body's code is
 *     `insufficient_quota` (the account's budget is spent, so retrying
 *     cannot help); every other 429, including one whose body could not
 *     be read, is the temporary throttle `rate_limit`. Defaulting to the
 *     throttle means a 429 is never mistaken for an exhausted quota.
 *   * 400: a malformed request — a converter bug, an unsupported
 *     parameter, or a request shape the endpoint does not accept.
 *     Retrying sends the same request again, so it is `non_retryable`.
 *   * 422: the model's structured-output reply failed the endpoint's
 *     own schema validation. Asking again can produce a conforming
 *     reply, so it is `schema_validation`.
 *   * Every other status (401, 403, the remaining 4xx) is
 *     `non_retryable`.
 */
export declare function categorizeHttpError(status: number, providerErrorCode?: string): THttpErrorCategory;
/**
 * True when `err` is an abort — a thrown value whose `name` is
 * `"AbortError"`. A timeout from `AbortSignal.timeout` is named
 * `"TimeoutError"` and so does not count.
 */
export declare function isAbortError(err: unknown): boolean;
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