But why? Mise does this and more. It can install binaries from github, gitlab, uv, npm, and many more.

Heck, mise has an HTTP backend that can install binaries from any URL. I use this to manage Atlassian CLI, whose official Windows binary is not on winget.

Agreed, this looks like a far more limited mise alternative that still requires a completely different tool to run.

Not sure if I'm misunderstanding the private binaries concept - what advantage does gzipping and encrypting the binary and putting it in an unlisted gist have over just storing a release in a private git repo only I can access with my PAT or key? Seems needlessly complicated.

mise ftw!