/**
 * Snippet + relevance-score helpers shared by the Postgres and SQLite search
 * backends (GH #614). Both index files already fetch full page `content` per
 * candidate row, so building a snippet here costs no additional round trip —
 * it's a client-side substring window around the first matched term, with
 * matches bold-marked. This is a client-side degrade path; there is no
 * DB-computed `ts_headline` in use (deferred as a fast-follow, see PR #620).
 */
/**
 * Plain-text window around the first token match in `content`, matched terms
 * wrapped in `**bold**`. Falls back to a lead-in slice when no token is found
 * verbatim (e.g. the FTS match was via stemming) so the field is never empty
 * for non-empty content. Frontmatter is stripped before the window is chosen
 * so a title/tag-only match never returns YAML (GH #634).
 */
export declare function buildSnippet(content: string, tokens: string[], windowSize?: number): string;
/** Relevance score exposed to callers: sum of weights for every field a query token matched on. */
export declare function scoreMatchedOn(matchedOn: string[]): number;
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