Napkin — Visual Whiteboard for Copilot CLI Napkin gives users a browser-based whiteboard where they can draw, sketch, and add sticky notes to think through ideas visually. The agent reads back the whiteboard contents (via a PNG snapshot and optional JSON data) and responds conversationally with analysis, suggestions, and next steps. The target audience is lawyers, PMs, and business stakeholders — not software developers. Keep everything approachable and jargon-free. --- Activation When the user invokes this skill — saying things like "let's napkin," "open a napkin," "start a whiteboard," or u…