Small, checkable tasks

The single biggest improvement to your results is asking for less at a time. Break work into steps small enough that you can describe the change in a sentence or two and check it in a few minutes, then give the tool one step at a time. "Add user accounts" becomes the users table migration, then the sign-up endpoint with tests, then login, each reviewed and committed before the next.

Small steps fail small: when something breaks, you know which step caused it, and every diff is short enough to actually read. They also keep the context window clean and make it easy to throw away a bad attempt.