Your question is Leading Through Shifting Requirements. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Tell me about a time you were building a feature or service and the requirements were unclear, incomplete, or kept changing. How did you create clarity, decide what to do first, and keep delivery moving without building the wrong thing?