This conflicts with mods that add their own barrelling machines. Is it possible to make them compatible, or does Pelagos already cover what they do?

Barreling machine was added in 0.5.0
If you have barreling mod that uses the same name (barreling-machine) they will be incompatible. Not sure if it't better to mark them as incompatible in mod list or make it work with planet installed.

I have seen at least 2 barreling mods.
I have few unique recipes planed for barreling machine, and adding them to every other mod's barreling machine could be hard or inpossible (to cover every version). I will think about it