no, you are right, LP uses snapcraft ... but there is also code in launchpad-buildd missing to publish them currently ... for my usecase i agreed with colin to actually just make my build spit out a .manifest in the toplevel build dir next to the snap ... but that indeed only works when using a tool that creates these files so yes, i think it would make sense if snapcraft itself could also create them.
no, you are right, LP uses snapcraft ... but there is also code in launchpad-buildd missing to publish them currently ... for my usecase i agreed with colin to actually just make my build spit out a .manifest in the toplevel build dir next to the snap ... but that indeed only works when using a tool that creates these files so yes, i think it would make sense if snapcraft itself could also create them.