Ask HN: Any Open Source GUIs for OpenAI Assistants API?

Has anyone come across an open source way to locally control an assistant that has a user interface?

I've been enjoying the custom GPT tool but have run into a few limitations. Given GPT's similarity to the Assistants API, I was going to try and re-create one using the Assistants API and threaded messages.

My near term goal is a tool usable by some internal folks to beta test a custom assistant. These users would not be comfortable working in a Jupyter notebook (and GPTs are a bit too limited for our needs, such as only supporting 1 auth type, etc).