My take on Diagram Design (cathrynlavery/diagram-design) after testing it with Claude Code:

• ✅ It made a good diagram. Clean boxes, labeled arrows, a legend, and a "data tier" group. It looks designed, not auto-generated.
• 📄 One file, nothing else needed. The diagram is a single HTML page you can open by double-clicking.
• 🎨 It asks about your brand first. Nice for teams, but it adds an extra back-and-forth before the first diagram.
• 🐢 Not instant: about 4.5 minutes in total for a 4-box diagram, because it plans and checks its own layout.
• 👍 Great if you want diagrams that look good in docs and slides. Overkill for a quick sketch.

"I asked for a diagram of a to-do app and got something that looks like a designer drew it. Just give it a few minutes."