Welcome to your interview.
The question is on your right: Design Feature for Existing Application. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
You’ve been asked to add a new feature to an existing application that already has active users, established workflows, and technical constraints. The feature needs to solve a real user problem without disrupting current behavior, and you’ll need to work within the realities of the current codebase rather than starting from scratch.
How would you approach designing a new feature for an existing application?