I think this would be a truly powerful tool if the promises were only able to be removed/declared complete by someone else, who would partner with you as a kind

I think this would be a truly powerful tool if the promises were only able to be removed/declared complete by someone else, who would partner with you as a kind of integrity escrow agent. You keep my future self honest to my present self, I do the same for you. Then generalize to groups with a big graph of stake holder crosslinks if you want to get enterprise-ey with it.