Function vectorSearch

packages/memos-core/src/storage/vector.ts:26–42

(
  store: SqliteStore,
  queryVec: number[],
  topK: number,
  maxChunks?: number,
  ownerFilter?: string[],
)

 * When maxChunks > 0, only searches the most recent maxChunks chunks (uses index; avoids full scan as data grows).
 */
export function vectorSearch(
  store: SqliteStore,
  queryVec: number[],
  topK: number,
  maxChunks?: number,
  ownerFilter?: string[],
): VectorHit[] {
  const all = maxChunks != null && maxChunks > 0
    ? store.getRecentEmbeddings(maxChunks, ownerFilter)
    : store.getAllEmbeddings(ownerFilter);
  const scored: VectorHit[] = all.map((row) => ({
    chunkId: row.chunkId,
    score: cosineSimilarity(queryVec, row.vector),
  }));
  scored.sort((a, b) => b.score - a.score);
  return scored.slice(0, topK);
}