Graph infinite looping

[AkshataDM]

Hi Folks,

I created a Langchain ChatModels wrapper for Cloudflare Workers AI models and I am following this tutorial to call tools.

https://langchain-ai.github.io/langgraph/tutorials/introduction/#part-1-build-a-basic-chatbot

However, my code runs in an infinite loop. I am able to get the responses from the LLM but the looping is unexpected behavior. Can someone please help me understand why this maybe happening? Could it be an issue with something I missed in the chat models wrapper code or an issue related to the LLM not able to understand the tools correctly?

[vbarda]

hi @AkshataDM -- do you have a langsmith trace? it sounds like there could be an issue w/ the tool calling implementation in your wrapper

[AkshataDM]

it looks like its looping recursively without providing any output.

[AkshataDM]

Turns out it was due to two issues-

1. The input prompt to the model needed to be formatted
2. The model wasn't supporting tool calling
   Once 1 was fixed, I tested the code on a model that did support tool calling and the code worked!