Searching the tmux mailing list [0], it looks like there were some recent discussions about migrating to GitHub.

Basically, it looks like the developers don't see any benefit to migrating that outweighs the cost of a migration. [1]

There is a GitHub mirror [2] maintained by, I think, one of the developers, but they don't accept pull requests.

It's interesting to note that, for such a popular project like tmux, there are so few contributors. [3] Five, to be exact.

Maybe that's an artifact of how the mirroring to GitHub works (perhaps the commit authors aren't translated correctly?), but I suspect it's more an artifact of an outdated contribution process and tooling.

[0] http://sourceforge.net/p/tmux/mailman/search/?q=github

[1] http://sourceforge.net/p/tmux/mailman/message/33826395/

[2] https://github.com/ThomasAdam/tmux

[3] https://github.com/ThomasAdam/tmux/graphs/contributors

lots of people have contributed to tmux (on a quick grep through the logs, probably ~25 have made significant or multiple contributions, ~170 have made small contributions)

Hi Nicholas! That's good to hear, and definitely makes more sense given how popular and old tmux is as a project.

So I guess something just didn't translate correctly to Thomas's GitHub mirror.