I don't know if you read the whole article. The author did make a Mini vMac fork to clean up the build system and code, she linked it at the end. https://github.com/InvisibleUp/uvmac .
Ha. I was starting to find the article a bit tiring and the moment my eyes landed on the Conclusion heading I stopped right there. You shouldn't trust my criticisms either.
My 2c: having played around with the codebase recently (to add C++ to the codebase), I did find Cursor helpful in figuring out how to work with the bespoke build system.