import type { ScannedFile, KeywordMatch, FileWordRef } from '../orient.types.js';
/**
 * @purpose Search files by keyword with three-level scoring: exact (+10), prefix (+5), fuzzy (+3).
 * @invariant AND semantics across tokens; scoring: exact (+10) > prefix (+5) > fuzzy (+3).
 * @param files All scanned project files.
 * @param index Inverted word index built by buildIndex.
 * @param query Lowercased keyword query.
 * @returns Scored keyword matches sorted by relevance descending.
 */
export declare function queryKeyword(files: ScannedFile[], index: Map<string, Set<FileWordRef>>, query: string): KeywordMatch[];