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import { Client } from '@elastic/elasticsearch'; const client = new Client({ node: process.env.ELASTICSEARCH_URL }); // Create index with custom mappings await client.indices.create({ index: 'products', mappings: { properties: { name: { type: 'text', analyzer: 'english' }, description: { type: 'text' }, price: { type: 'float' }, category: { type: 'keyword' }, embedding: { type: 'dense_vector', dims: 1536, index: true, similarity: 'cosine' }, }, }, }); // Semantic + keyword hybrid search const results = await client.search({ index: 'products', knn: { field: 'embedding', query_vector: queryEmbedding, k: 10, num_candidates: 100 }, query: { match: { name: 'wireless headphones' } }, });