Function rankChunks

src/context/retrieval.ts:283–289

(queryEmbedding: number[], chunks: Chunk[], topK: number)

/** Rank all embedded chunks against a query embedding, best first. */
export function rankChunks(queryEmbedding: number[], chunks: Chunk[], topK: number): ScoredChunk[] {
  return chunks
    .filter(c => c.embedding && c.embedding.length > 0)
    .map(c => ({ chunk: c, score: cosineSim(queryEmbedding, c.embedding!) }))
    .sort((a, b) => b.score - a.score)
    .slice(0, topK);
}

/**
 * Hybrid rank: semantic (cosine over embeddings) fused with lexical (BM25) via