(or at least cleanly error out, instead of “sometimes failing, sometimes not”, even if nothing got really uploaded, even if it should)

Yes! Absolutely. This is super useful feedback, btw, our error messages are not great at the moment. I’m so impatient to be done with the new Sanakirja, so I can (1) finally take care of these, and (2) benchmark the slow processes again, like pijul git.

Another thing I want to do is signal conflicts better, in particular when a change has been amended in the remote (like “you seem to have this patch, the remote doesn’t have it, and it’s in conflict”).