export interface AuthorityBoostable {
    url: string;
    relevance_score: number;
}
export interface AuthorityBoostOptions {
    /** URLs that are rare-term MISSES for the current query (contain none of the
     * query's compound tokens, or have phrase run < 2). Generic (non-known-
     * subject) authority for these is multiplicatively reduced so an off-topic
     * high-authority page can't outrank an exact-match page. Per-result, not
     * query-wide: a high-authority page that DOES contain the rare terms (a hit)
     * keeps its full authority. */
    capUrls?: ReadonlySet<string>;
}
export declare function applyAuthorityBoost<T extends AuthorityBoostable>(query: string, results: T[], opts?: AuthorityBoostOptions): T[];
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