# Chain-of-Note (Wikipedia) Implements Chain-of-Note as described in https://arxiv.org/pdf/2311.09210.pdf by Yu, et al. Uses Wikipedia for retrieval. Check out the prompt being used here https://smith.langchain.com/hub/bagatur/chain-of-note-wiki. ## Environment Setup Uses Anthropic claude-2 chat model. Set Anthropic API key: ```bash export ANTHROPIC_API_KEY="..." ``` ## Usage To use this package, you should first have the LangChain CLI installed: ```shell pip install -U "langchain-cli[serve]" ``` To create a new LangChain project and install this as the only package, you can do: ```shell langchain app new my-app --package chain-of-note-wiki ``` If you want to add this to an existing project, you can just run: ```shell langchain app add chain-of-note-wiki ``` And add the following code to your `server.py` file: ```python from chain_of_note_wiki import chain as chain_of_note_wiki_chain add_routes(app, chain_of_note_wiki_chain, path="/chain-of-note-wiki") ``` (Optional) Let's now configure LangSmith. LangSmith will help us trace, monitor and debug LangChain applications. LangSmith is currently in private beta, you can sign up [here](https://smith.langchain.com/). If you don't have access, you can skip this section ```shell export LANGCHAIN_TRACING_V2=true export LANGCHAIN_API_KEY= export LANGCHAIN_PROJECT= # if not specified, defaults to "default" ``` If you are inside this directory, then you can spin up a LangServe instance directly by: ```shell langchain serve ``` This will start the FastAPI app with a server is running locally at [http://localhost:8000](http://localhost:8000) We can see all templates at [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs) We can access the playground at [http://127.0.0.1:8000/chain-of-note-wiki/playground](http://127.0.0.1:8000/chain-of-note-wiki/playground) We can access the template from code with: ```python from langserve.client import RemoteRunnable runnable = RemoteRunnable("http://localhost:8000/chain-of-note-wiki") ```