LangChain.js 0.3 dev releases

[jacoblee93]

Hey all,

We are planning to release version 0.3.0 of @langchain/core, @langchain/community, langchain, and all integration packages at the end of next week!

The key change is to make @langchain/core a peer dependency in order to avoid mysterious type errors like this that are often caused by package managers resolving multiple versions of @langchain/core. This has become more common as the number and popularity of integration packages has grown.

We have released dev versions of a number of LangChain.js packages. Developers who are interested in an early preview should feel free to install and test these packages. Any feedback you are willing to share is helpful as we iron out the kinks and work toward a smooth 0.3.0 release!

Available packages (must be used with each other):

@langchain/[email protected]
@langchain/[email protected]
[email protected]
@langchain/[email protected]
@langchain/[email protected]
@langchain/[email protected]
@langchain/[email protected]
@langchain/[email protected]

Breaking changes:

• You may need to explicitly install @langchain/core (and the latest 0.3.0-rc.0 version), since core is now a peer dependency of all packages rather than a direct dependency.
• We have removed deprecated document loader and self-query retriever entrypoints from langchain. These should now be imported from @langchain/community.
• We have removed legacy Google PaLM models from community.
• Callback backgrounding is now enabled by default. This means that if you are in serverless environments like AWS Lambda, you should set process.env.LANGCHAIN_CALLBACKS_BACKGROUND = "false" in order to wait for all traces to finish before an environment is torn down.

Outside of these breaking changes, runtime errors are unexpected-- we'd appreciate bug reports on this Discussion.