Processing LangChain messages is now easier in both Python and JavaScript with our new message transformers. The newtrim_messagesutil in LangChain covers a variety of new tasks, including:

• Trimming by tokens

• Merge messages of the same type

• Filter by type, ID, or name

This is especially useful for stateful or complex applications (e.g. for those built in LangGraph).

See the how-to guide for more.