Frame: create a Pitch from a problem statement or idea

When the user types /frame and describes a problem, idea, or opportunity, do the following:

1) Understand the problem space (required)

• Ask clarifying questions to understand the core problem (max 3–5 questions).
• Identify who is affected and what they're trying to accomplish.
• Search the repo for existing related functionality, prior art, or adjacent features.
• Note any existing patterns, models, or abstractions that might be relevant.

2) Create skeleton Pitch file

• Location: projects/<domain-name>/<project-name>/pitch.md
• Domain name: the product area or team domain (e.g., payments, family-messaging, attendance-plus)
• Project name: derive a stable folder slug from the problem domain (e.g., bank-deposit-reconciliation, attendance-notifications).
• First line: # Pitch: <Concise title>
• Create the file with just the header and section structure (no content yet)