Comment by sunshowers

Except the resemblances extend to the entire server, not just the idea of derived data. The idea of derived data becomes apparent only once you have bought into the core Mononoke insight about Bonsai changesets, later copied wholesale and presented as the core Scion insight about Scion changesets.

As I suspected at the time of writing the post (but could not verify) and as was later confirmed in private correspondence to me, Anthropic did not come up with this from first principles. Claude was pointed directly at Mononoke and asked to re-engineer it.