Define product non-goals
Write down what the product will deliberately not do, and why.
What this prompt helps you do
An explicit non-goals list with rationale and the conditions that would revisit each one.
When to use it
Scope keeps expanding because nothing has been ruled out in writing.
What to prepare
The goal, relevant source material, constraints, examples, and the decision or action this should support.
How to get a strong result
Give each non-goal a reason; an unexplained exclusion gets reopened at the next meeting.
How to use this prompt
Replace each placeholder with accurate context. Paste the complete prompt into ChatGPT, review the response critically, resolve important questions, and use it as a considered input to the next decision—not as an unchecked final answer.