/**
 * Return synonyms for a single token. Returns the empty list when the
 * token isn't in our map (we don't fuzzy-match — false expansions hurt
 * more than they help).
 */
export declare function synonymsOf(token: string): string[];
/**
 * Expand a query token list with conservative synonyms. Returns the
 * deduped union (originals + synonyms) so all-downstream retrievers can
 * use the expanded set without further bookkeeping.
 */
export declare function expandTokens(tokens: string[]): string[];
/**
 * Build an FTS5 query string from a list of tokens that ORs each one,
 * adding synonyms inline. Caller still has to escape special chars; this
 * just constructs the expansion.
 */
export declare function expandFtsQuery(rawQuery: string): string;