I have absolutely no idea what this is.
It looks like a pretty and minimalist theme for various shells, that also provides hints when you are in a source code directory for the git status and the language version.
I use powerlevel10k, which is only for zsh. It looks quite similar, aesthetically, but it advertises having the best performance, using a special git status tool. But I know there are other APIs inside of git libraries, and also some rust-based libraries, that could be even faster.
Would be interested in a performance comparison.