sol repository on Github is not being used. We are starting to move Solus-specific repositories to Phabricator. I have a local source tree where I am working steadily through
sol, which I will eventually mirror to Phabricator (first privately for internal feedback and eventually publicly). Right now, I don't want collaborators on
sol because I have spent far too much time designing it for other people to get up to speed and help me with the initial version. Please be patient.
As far as
eopkg is concerned, you are looking at the correct repository. We have not been spending any more time developing it than absolutely necessary. A PR would have to contain a pretty important change for us to consider merging it at this point.
I understand how much people would like to contribute code to the project, but the simple reality is that a lot of the core tooling needs full rewrites and significant design effort. Much of the design changes have been in discussion for years now. And Josh and I both agree that we want to lay a solid foundation for those projects before letting people go wild with PRs. Until that work is complete, I'm not comfortable asking people to contribute to those projects.
If you are looking for ways to contribute code, I would suggest helping with bug fixes in
budgie-desktop. If there is something else you are eager to work on, I am available on IRC between 08:00 and 22:00 EST most days and will happily hear your proposals if I am not in meetings.