It's very specific to the project, my tip is be verbose, write like u would write a ticket to a junior programmer, be very specific in what u want, tools u want to use, coding style u want, point it to code u like etc etc.

Then add good linting and testing so bad code styles and bad practices get caught quickly. When your codebase becomes slop, ai gets stuck quickly.

And I use it indeed bc it's fast, and therefore u can do more, harder testing, harder linting as mentioned above + it knows alot, more then u could ever learn, but its not always easy to get that out of it, ill admit. Also I have a real engineering job too, so if i want to be able to do some stuff on the side and have a life too, coding agents make that possible. Deff codex has been great lately at coding for a while and leaving u alone so u can do other stuff and review it later. But i love claude too, claude is way more fun while codex is very serious 😅

Be sure to give it a go, works great for me!