Develop feature requirements

We must produce clear feature requirements for the mobile checkout flow update. Write requirements that include user story, acceptance criteria, UI behavior, performance targets, analytics events, and error states. Prioritize the payments team's must-haves and list dependencies on the fraud service and backend tokenization. Prepare it so the engineering lead can estimate in the Monday planning meeting.

Before the planning meeting, make the requirements easy to estimate: surface the payment success-rate target and the critical path dependencies at the top, mark which items are negotiable scope versus non-negotiable, and highlight anything that would make the engineering lead hesitate to estimate. Provide a one-paragraph summary for product and one for engineering.

The fraud team notified me this morning that tokenization won't be available this sprint. I need the likely impacts on scope and go-to-market, what short-term options I can ask engineering to consider, and which stakeholders to notify first to avoid surprises at next week's demo.

Across several features we consistently underestimate integration work with backend teams and then miss delivery dates. Identify where we are misjudging complexity, and recommend one change to the requirement-writing or planning ritual that will reduce these surprises and improve cross-team creditability.