Author here. The code I made took me 3 hours (including getting up to speed on RubyLLM). I also intentionally DIDN'T use a coding assistant to write it (although I use Windsurf in my regular work). :D

It's clearly not a full featured agent but the code is here and it's a nice starting point for a prototype: https://github.com/radanskoric/coding_agent

My best hope for it is that people will use it to experiment with their own ideas. So if you like it, please feel free to fork it. :)