Stop prompting Codex like ChatGPT

There's a pattern I see from almost every developer who tries Codex for the first time and walks away underwhelmed. They open it up, type something like: "Hey, can you help me refactor my authentication module to use the new JWT library and also update the tests and maybe clean up the error handling while you're at it?" Codex starts. It works for a while. Then it returns something that's fine but not complete in itself. They tweak it in chat. It gets better, then breaks something else. Twenty minutes later they're in a back-and-forth loop that feels slower than just doing it themselves.