has satshoot published a NIP? as i see it, catallax is a simple protocol available for market builders to use as a straightforward interopable foundation, and it happens ta have a hosted reference client for testing and protocol usage examples. markets, clients and platforms would layer their own business specific complexities on top of the catallax Kinds and at the bottom the events would remain viable to interact with in other competing clients. there is a NIP PR to the nostr repo and a only 3 Kinds involved.
Satshoot appears more like a feature-rich platform with plenty of user-friendly opinions baked in and complex ux paths to accomodate platform assumptions and goals. it is open source, but i don't believe there is a NIP published, and i suspect that is because of how rich the data model is. simply, it's not simple, and i don't see their approach as being easy to interop with in other clients.