curso-langchain/slides/pages/pending/03.md

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Long-term Memory con Semantic Search

InMemoryStore con embeddings

import { InMemoryStore } from "@langchain/langgraph";
import { OpenAIEmbeddings } from "@langchain/openai";

const embeddings = new OpenAIEmbeddings({ model: "text-embedding-3-small" });

const store = new InMemoryStore({
  index: { embeddings, dims: 1536 }
});

// Guardar memorias
await store.put(["user_123", "memories"], "1", { text: "I love pizza" });

// Buscar por similitud semántica
const items = await store.search(
  ["user_123", "memories"],
  { query: "I'm hungry", limit: 2 }
);