I am going to ask you 2 questions please answer them to the best of your abilities  
The first question is how make an agent which is build using langchain and free hugging face LLM API . the agent should be able to search the web for the given design idea and com up with steps to follow to build the design model and use this steps and build the model using openscad 
The Second question is how to modify the source code of openSCAD so that the agent can connect to it to build the design model 
Finally write the code for it
