Hi @Tokarzewski,
Ok, now I understand why you are asking. I think this is totally possible. When we add HVAC system configuration (you called it as graphs) to HBJson, you should be able to access it from Python since we are also generating the Python SDK for Honeybee Schema. Ironbug can take this HVAC system configuration from HBJson and translate it to OpenStudio file for simulation.
So for you, you don’t need to deal with Ironbug directly, and you just need to create the HVAC system configuration via Honeybee Schema Python SDK for HBJson.
That’s my plan to do.