export declare const PHRASE_BOOST_WEIGHT = 1.5;
export declare const EXACT_IDENTIFIER_PROTECTION_BONUS: number;
export declare function scoreBigramRerankCandidate(params: {
    baseScore: number;
    minimumBaseScore: number;
    maximumBaseScore: number;
    matchedBigrams: number;
    queryBigramCount: number;
    exactIdentifierMatch?: boolean;
}): number;
/**
 * Ordered phrase tokens deliberately do not expand compound identifiers. The
 * lexical tokenizer may index both `Retry-After` and its parts for recall, but
 * phrase matching must never invent adjacency between those expanded parts.
 */
export declare function surfacePhraseTokens(value: string): string[];
export declare function orderedWordBigrams(tokens: readonly string[]): string[];
export interface OrderedPhraseScore {
    matchedBigrams: number;
    queryBigrams: number;
}
/**
 * A deterministic, positive-only ordered-word signal across independent text
 * segments. Query grams and matches are sets: a title/passage repetition must
 * not manufacture more phrase evidence than the query contains, and segment
 * boundaries must not invent adjacency.
 */
export declare function scoreOrderedPhraseSegments(queryBigrams: readonly string[], passageTexts: readonly string[]): OrderedPhraseScore;
/** A deterministic, positive-only ordered-word signal for one passage. */
export declare function scoreOrderedPhrase(queryBigrams: readonly string[], passageText: string): OrderedPhraseScore;
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