Add a development tool. Using Claude Code on the desktop version of Codex to develop skills allows Codex to help me check again. Since skills are now supported, I fixed the Daily Beautiful Pictures skill today. Conveniently, I also had Codex develop an automatic invoice processing program. As long as I drop the invoice in, the program will automatically classify it based on the rules. This is the first small closed loop; future upgrades can include extracting invoice numbers and other features. The key to AI Coding is to start with a small product. With confidence and experience, continuously optimize, and gradually you can handle medium to large projects. There’s always something to do every day!