A lightweight PRD that explains the problem, the goal and the scope before the solution.
When to use itBefore a team starts building anything larger than a couple of sprints.
Problem
Who has the problem, how you know, and what it costs them today.
Goals and non-goals
What success looks like, with metrics. What this work will deliberately not do.
Users and use cases
The primary user and the three to five jobs they need to get done.
Requirements
Must, should and could. Write them as user needs, not UI.
Open questions
Unknowns, owners and the date you need an answer.
Release plan
Milestones, rollout approach and how you will measure the release.