I am not an expert, but I’ve been tinkering architectural blueprints since Opus 5.5 released. From what I’ve learned, the vanilla results are a bit dated w.r.t CAD standards. Seems the only public version of the US NCS is v3 while the latest is v7. I ended up having to buy a licensed copy of v7 and develop my own MCP server to explore the standard. The result was a fairly significant rewrite of the application I wrote to comply with the latest requirements (see http://app.factoryplanner.net/try)