/**
 * Ranks short labels (chat titles, action names) against what someone typed.
 *
 * Higher is better; `null` means no match. Tiers, best first:
 * whole label starts with the query, a word starts with it, it appears
 * anywhere, every query word appears in some order, and finally the query's
 * letters appear in order ("kbsh" → "Keyboard shortcuts"). Within a tier,
 * shorter labels and earlier positions win. Letters-in-order matches rank below
 * `LOOSE_MATCH_BELOW`, so a list can drop them once it has real matches.
 */
/** Ranks below this are letters-in-order guesses rather than real matches. */
export declare const LOOSE_MATCH_BELOW = 400;
/** Case- and accent-insensitive form used for matching. */
export declare function foldForSearch(value: string): string;
export declare function rankLabel(rawLabel: string, rawQuery: string): number | null;
/** The best rank across a label and extra keywords (a keyword match ranks below the same match on the name). */
export declare function rankWithKeywords(label: string, keywords: readonly string[] | undefined, query: string): number | null;