It's called "cod" and doesn't support fish? :(
Why would I need a fish if I already have cod? ;)
Actually when I started this project I used fish as my main shell on laptop and first versions of cod did support fish, but then I decided to focus bash/zsh as they look more popular.
I still want to add fish support when I have some time though. It doesn't look complicated.
Features I wanted to include originally were
At the moment I have a tool that generates completions from `--help` messages and supports bash/zsh. I use it daily and it makes me little bit happier.[1] https://github.com/dim-an/cod