import type { ProviderId } from "../../types.js";
import { ProviderError } from "../http.js";
export declare function formatProviderFailureForUser(error: unknown): string;
export declare function failureMessageFor(providerId: ProviderId, error: unknown): string;
export interface ProviderFailure {
    provider: ProviderId;
    message: string;
    error?: unknown;
}
export declare class AggregateProviderError extends ProviderError {
    readonly failures: ReadonlyArray<{
        provider: ProviderId;
        message: string;
    }>;
    constructor(message: string, failures: ReadonlyArray<{
        provider: ProviderId;
        message: string;
    }>, status?: number | undefined, retryAfterSeconds?: number | undefined);
}
export declare function aggregateProviderError(message: string, failures: ProviderFailure[], emittedBytes?: number): AggregateProviderError;
export declare function formatFailures(failures: ProviderFailure[]): string;
export declare function shouldStopProviderFallback(error: unknown): boolean;