I'm looking for the opposite of "error-prone", specifically in the context of programming style. As in, "Jack has not-error-prone coding style".
Some words that are inappropriate for this context are "infallible", "error-less" and "unfailing". Nobody writes infallible code. "Reliable" hits a little closer to home, but it describes the outcome more than the process. If you have error-prone coding style, it just takes longer to get your program to function reliably.
Best Answer
Robust seems to be able to indicate good code quality. How about clean and well-structured?