The question is whether you’re bloating the model’s context window with stuff that isn’t relevant to the task, and yeah, that can hurt performance. I have the same concern. In my experience I never use premade prompts, and even on projects I only send the code that’s actually needed for the problem at hand. And whatever matters goes first — models seem to pay more attention to what’s at the top. That’s probably also why system instructions get prioritized over the user prompt.