/**
 * Full-Text Search via LadybugDB FTS
 *
 * Uses LadybugDB's built-in full-text search indexes for keyword-based search.
 * Always reads from the database (no cached state to drift).
 *
 * FTS indexes are created lazily on first query (via `ensureFTSIndex`) — see
 * `cgdb-adapter.ts` for the rationale. This keeps `analyze` fast (the
 * ~440 ms × 5 LadybugDB CREATE_FTS_INDEX cost dominates pipeline time on
 * small repos / CI runners) at the cost of paying that overhead on the
 * first `query`/`context` call in a session.
 */
export interface BM25SearchResult {
    filePath: string;
    score: number;
    rank: number;
    nodeIds?: string[];
    /** False when results came from the bounded fallback scan instead of FTS. */
    ftsUsed?: boolean;
}
/**
 * FTS table set served by `searchFTSFromCgdb`. Centralised so that both
 * the CLI/pipeline path and the MCP pool path stay in lockstep.
 *
 * The properties list is computed at FTS-create time via `ftsPropertiesFor`
 * — for repos that were analysed with `--compress brotli|zstd`, the
 * `content` column holds base64-of-encoded-bytes and would tokenise to
 * useless tokens. Those repos get name-only FTS so search at least
 * matches function/class names instead of returning random hits on
 * base64 alphabet. Plain (compress='none' / unset) repos get the full
 * `name + content` index for body-text matches. RFC 0001 Phase 2.5.
 */
export declare const FTS_TABLES: ReadonlyArray<{
    table: string;
    indexName: string;
}>;
export declare const ftsPropertiesFor: (compress: "none" | "brotli" | "zstd" | undefined) => readonly string[];
/**
 * Search using LadybugDB's built-in FTS (always fresh, reads from disk)
 *
 * Queries multiple node tables (File, Function, Class, Method) in parallel
 * and merges results by filePath, summing scores for the same file.
 *
 * @param query - Search query string
 * @param limit - Maximum results
 * @param repoId - If provided, queries will be routed via the MCP connection pool
 * @returns Ranked search results from FTS indexes
 */
export declare const searchFTSFromCgdb: (query: string, limit?: number, repoId?: string) => Promise<BM25SearchResult[]>;