Day 1 prompt: "fix the upload thing, it broke again" Day 30 prompt: the real error, the cause first, then a test that proves the fix. Same model. Completely different result. The difference is a prompt library. The 5 prompts I'd save in week 1: Plan first Explain this Fix with proof Review my diff Save what worked Add one every day and by day 30 you own something nobody can copy. Save this. follow @cyrilXBT