ai-agents-chromadb-compatibili-when-upgrading-to-chromadb-0-4-with-langchain-usin-a836a490

THEN Remove the 'chroma_db_impl' parameter entirely from Chroma initialization. For new projects, instantiate a chromadb.PersistentClient directly and pass it to the LangChain Chroma class via the `client` parameter. For existing databases, use the `chroma-migrate` tool to upgrade the storage format before the switch.

import chromadb
from langchain.vectorstores import Chroma

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