Hey, I left a comment on the related PR #5 but it merged as i was typing, so putting here too for visibility.
I would recommend mise.jdx.dev. Growing popularity, loved by figma and dhh. (and myself and my team).
Sure you can mise use cargo:tirith but if the user doesn't use rust, this will first install rust toolchain then tirith. Where as mise use tirith would be nicer (I assume it would work like cargo binstall extension) and adding a tool just requires a PR to the mise repo tools.toml.
I'd be happy to make a PR on your behalf to the mise repo and then make a PR here to update docs.
Thanks for this great tool. Doing us a great service. Adding to my dotfiles now 😄.