my exact experience, and AI is especially fragile when you are starting new project from scratch.

Right know I'm building NNTP client for macOS (with AppKit), because why not, and initially I had to very carefully plan and prompt what AI has to do, otherwise it would go insane (integration tests are must).

Right know I have read-only mode ready and its very easy to build stuff on top of it.

Also, I had to provide a lot of SKILLS to GPT5.3