UALink Under The Hood: Why Full-Stack Verification Wins

It is tempting to picture UALink as a clean line between two accelerators: requests enter one side, responses emerge from the other. The abstraction is useful — but it conceals almost everything that makes the protocol interesting, and almost everything that makes it difficult to verify. Verifying UALink means following a transaction the way the silicon does: down through four layers, out across one, two, or four SerDes lanes at the configured 100G or 200G serial rate, and back again, with its m