import type { RetrievalSource } from './types.js';
export type { RetrievalSource };
export interface RankedItem {
    id: string;
    score: number;
    source: RetrievalSource;
}
export interface FusedRankedItem {
    id: string;
    score: number;
    source: 'hybrid';
}
/**
 * Fuse multiple rankings using Reciprocal Rank Fusion.
 */
export declare function rrf(rankings: Map<string, RankedItem[]>, weights: {
    lexical: number;
    semantic: number;
    graph: number;
}, k?: number): FusedRankedItem[];
//# sourceMappingURL=rrf.d.ts.map