export type ExtrasLevel = "full" | "bare";
export type FailureVerdict = "unsupported-endpoint" | "unsupported-extras" | "other";
export declare const PROBE_UNRELIABLE_STATUS: Set<number>;
export declare function failureText(error: unknown): string;
export declare function providerStatusCode(error: unknown): number | undefined;
export declare function isGenericModelRejection(status: number | undefined, text: string): boolean;
export declare function classifyResponsesFailure(error: unknown, extras: ExtrasLevel): FailureVerdict;