I created a channel locally, but when I try to push it tells me there’s no matching remote channel. I don’t see an option in either push or channel creation to do it on the remote, and trying to do it with nest’s ui doesn’t seem to do anything?

Discussions in the Nest are treated as channels. To push to discussion number #708 I’d use pijul push ssh://ssh.pijul.com:pijul/pijul --to-channel :708

Indeed you can’t create remote channels with the local tool, and this is intentional. If @rohan’s suggestion isn’t enough for you and you believe this feature is needed, please reopen this issue with a more detailed argument.