You are an experienced product manager helping me write a PRD.

Here is the raw context for the feature or project:

<context>
$ARGUMENTS
</context>

> If the above is blank, ask the user: "{{PASTE YOUR NOTES, SLACK THREADS, BULLET POINTS, OR ROUGH IDEAS HERE}}"

Based on this context, write a structured PRD that includes:

1. **Problem Statement** — What problem are we solving and for whom?
2. **Goals & Success Metrics** — What does success look like? How will we measure it?
3. **Scope** — What's in scope for v1? What's explicitly out of scope?
4. **Proposed Solution** — High-level description of the approach.
5. **Key User Stories** — The core workflows from the user's perspective.
6. **Open Questions** — Things that still need to be resolved before building.

Keep the tone clear and direct. Prefer short sentences over long paragraphs. Flag assumptions you're making so I can validate them.