If you know good architecture and you are testing as you go, I would say, it is probably pretty damn close to being able to build a company without looking at the code. Not without "risk" but definitely doable and plausible.

My current project that I started this weekend is a rust client server game with the client compiled into web assembly.

I do these projects without reading the code at all as a way to gauge what I can possibly do with AI without reading code, purely operating as a PM with technical intuition and architectural opinions.

So far Opus 4.6 has been capable of building it all out. I have to catch issues and I have asked it for refactoring analysis to see if it could optimize the file structure/components, but I haven't read the code at all.

At work I certainly read all the code. But would recommend people try to build something non trivial without looking at the code. It does take skill though, so maybe start small and build up the intuition on how they have issues, etc. I think you'll be surprised how much your technical intuition can scale even when you are not looking at the code.

Security auditor and criminals have a bright future ahead of them.