I take it the smiley means you know this, but to be clear, that’s not the kind of rewrite we’re talking about. Fossil is against providing multiple/alternate sequences of commits that can represent the same timeline. Breaking the Merkle tree isn’t even in consideration (because a determined adversary can just as easily break Fossil). The discussion is really over workflows and perceptions, and has very little to do with the technicalities of preserving history.