AI CAN ALREADY DO THE MEP FOR A WHOLE HOUSE. LOOK AT THIS! The task was a two-story villa with heating and cooling, plumbing, fire sprinklers and lighting, all to US code and shown the way you'd model it in Revit. Claude Opus 5.5 placed the equipment, routed and sized the ducts, ran the pipes and checked everything against the structure. In the end that's 286 ft of duct, 1,006 ft of water lines and 20 sprinkler heads. What gets me is that it knows the actual workflow and why things go where they go. When the check found a duct going through a beam, it fixed it the way an engineer would, dropping the duct into a soffit under the beam. It's a Revit-style scene built from scratch, not a real Revit file, and no engineer stamped it. But the tools and the order are the real ones, so you can follow the same workflow in actual Revit. A year ago AI couldn't get close to this. MEP folks, what would you flag first?