I have a pretty bad taste in my mouth from GitHub, GitLab, Forgejo, Gitea, etc. They all attempt to hijack Git itself and become a monolith and single custom interface, rather than independent components that work around the Git repo. I want the Unix philosophy applied to Git and other functions. That way I'm not forced to switch the entire kitchen sink out when some single piece of functionality or hoster ends up breaking things.

Sounds like the description of Radicle. :-) https://radicle.dev/guides/protocol#collaborative-objects