It lacks a critical self, but the weights are there for in context learning and nudging behaviour. It's goal is to complete whatever task is given. You need to make sure the outcome you want is clearly defined.

You don't need elaborate prompts, just a few lines

"All code must have corresponding tests written ahead of time to prove the code meets the specification" is sufficient for most use cases. Prose can help nudge it more if it isn't adhearing consistently.