import * as AIError from "../error/index.js";
import type { RerankRequest, RerankResult } from "../rerank/types.js";
export declare const MAX_RERANK_BODY_BYTES: number;
export interface RerankObjectDocument {
    text: string;
}
export type RerankWireDocument = string | RerankObjectDocument;
export interface RerankParsedRequest {
    modelId: string;
    request: RerankRequest;
    originalDocuments: RerankWireDocument[];
}
export declare class RerankWireError extends AIError.ValidationError {
    readonly status: number;
    constructor(status: number, message: string, options?: {
        cause?: unknown;
    });
}
/** Parse an OpenRouter-compatible JSON rerank request. */
export declare function parseRequest(req: Request): Promise<RerankParsedRequest>;
export interface RerankResponseBody {
    model: string;
    results: Array<{
        index: number;
        relevance_score: number;
        document?: RerankObjectDocument;
    }>;
    usage: {
        total_tokens: number;
        cost: number;
    };
}
/** Encode a canonical result as the OpenRouter rerank response shape. */
export declare function encodeResponse(result: RerankResult, requestedModelId: string, originalDocuments: readonly RerankWireDocument[], returnDocuments: boolean): RerankResponseBody;
export declare function formatError(status: number, errorType: string, message: string): Response;