ai-agents-vector-store-migrati-with-chromadb-0-4-the-old-persist-directory-initia-cbdf8ed0

THEN Create a `chromadb.PersistentClient` with the desired path, then pass it to LangChain's Chroma constructor using the `client` parameter. Do not use `persist_directory` or the old `chroma_db_impl` argument. Note that `.persist()` is deprecated; persistence is automatic.

import chromadb
from langchain.vectorstores import Chroma

client = chromadb.PersistentClient(path='./db')
vector_db = Chroma(
    client=client,
    collection_name='my_collection',
    embedding_function=embeddings
)