Nice! We built something very similar recently, it is more like "Ask your documentation" but very similar implementations otherwise.
See a demo on the huggingface transformers documentation: https://huggingface.co/spaces/jerpint/buster
See a demo on the huggingface transformers documentation: https://huggingface.co/spaces/jerpint/buster
The only other project that I've seen that's doing something close to this is this one: https://github.com/getbuff/Buff
It's a bit more similar to the OPs bot (it's a Discord bit).
Cool to see momentum in this space!