Function searchPersisted

src/context/retrieval.ts:213–246

(
  projectRoot: string,
  embeddingModel: string,
  query: string,
  queryEmbedding: number[],
  topK: number,
  idxForFallback: Index | null,
  semanticOnly = false,
)

 * read it twice); pass null to force SQLite-only.
 */
export async function searchPersisted(
  projectRoot: string,
  embeddingModel: string,
  query: string,
  queryEmbedding: number[],
  topK: number,
  idxForFallback: Index | null,
  semanticOnly = false,
): Promise<ScoredChunk[]> {
  // Try SQLite first.
  try {
    const { openSqliteIndex, searchSqlite, allChunksFromSqlite } = await import('./sqlite-index.js');
    const handle = await openSqliteIndex(projectRoot, embeddingModel);
    if (handle) {
      // Wide semantic pool from the quantized store…
      const semantic = searchSqlite(handle, queryEmbedding, Math.max(topK * 3, 50));
      if (semanticOnly) {
        handle.db.close();
        return semantic.slice(0, topK);
      }
      // …then fuse with BM25 over the full chunk set.
      const allChunks = allChunksFromSqlite(handle);
      const { hybridRank } = await import('./hybrid-search.js');
      const fused = hybridRank(allChunks, semantic, query, topK);
      handle.db.close();
      return fused;
    }
  } catch { /* fall through to JSON */ }

  // JSON fallback.
  if (!idxForFallback) return [];
  if (semanticOnly) return rankChunks(queryEmbedding, idxForFallback.chunks, topK);
  return rankChunksHybrid(queryEmbedding, query, idxForFallback.chunks, topK);
}

export async function buildIndex(
  projectRoot: string,