For things where I don't want creativity, I tell it to write a script.

For example, "write a comprehensive spec for a script that takes in the date and a location and computes when golden hour is." | "Implement this spec"

That variability is nice when you want some creativity, e.g. "write a beautiful, interactive boids simulation as a single file in html, css, and JavaScript."

Words like "beautiful" and interactive" are open to interpretation, and I've been happy with the different ways they are interpreted.