/**
 * Candidate text passed to a query-time reranker.
 */
export interface RerankCandidate {
    /** Opaque identifier used to correlate reranked outputs back to inputs. */
    id: string;
    /** Plain text content for the candidate chunk. */
    text: string;
}
/**
 * Reranker output for a single candidate.
 */
export interface RerankResult {
    /** Same identifier as the input candidate. */
    id: string;
    /** Provider-specific relevance score. Higher means more relevant. */
    score: number;
}
/**
 * Optional query-time reranker applied after vector retrieval.
 */
export interface Reranker {
    rerank(query: string, candidates: RerankCandidate[], options?: {
        topN?: number;
        signal?: AbortSignal;
    }): Promise<RerankResult[]>;
}
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