Feature Request: Library Support demand

[jiangziyue1219]

When I use langgraph to construct a RAG program, I failed to config the library configurations. I hope that the LLM node can be RAGed through the library, but in the case of langgraph syntax, I have to define a tool node and let the LLM model node use this tool node to achieve it.

so, is there any more convenient ways to achieve this? Such as, I can config the library when defining the LLM node?