Function mergeEmbeddingVectors

src/core/embeddings.ts:259–280

(vectors: number[][], weights: number[])

}

function mergeEmbeddingVectors(vectors: number[][], weights: number[]): number[] {
  if (vectors.length === 0) throw new Error("Cannot merge empty embedding vectors");
  if (vectors.length === 1) return vectors[0];

  const dimension = vectors[0].length;
  const merged = new Array<number>(dimension).fill(0);
  let totalWeight = 0;

  for (let i = 0; i < vectors.length; i++) {
    const vector = vectors[i];
    if (vector.length !== dimension) {
      throw new Error(`Embedding dimension mismatch: expected ${dimension}, got ${vector.length}`);
    }
    const weight = Math.max(1, weights[i] ?? 1);
    totalWeight += weight;
    for (let d = 0; d < dimension; d++) merged[d] += vector[d] * weight;
  }

  if (totalWeight <= 0) return vectors[0];
  for (let d = 0; d < merged.length; d++) merged[d] /= totalWeight;
  return merged;
}

export async function fetchEmbedding(input: string | string[]): Promise<number[][]> {
  const inputs = Array.isArray(input) ? input : [input];