Diagrams that argue. Not boxes that label.

Install

Themes

Five themes ship today. Author a new one in 20 lines of JSON + npm publish.

default-sketchy

stripe-press

notion

whiteboard

dark

Browse theme details · Create a custom theme

The methodology

Diagrams are arguments. The shape should BE the meaning.

• Isomorphism test. Would the structure alone communicate the concept?
• Evidence artifacts. Real code, actual API names, concrete formats (not placeholder text).
• Taste gate. Delete until density ~4/10. One or two accents. Anti-slop catalog enforced.
• Render → inspect → fix. The diagram isn't done until the PNG looks right.
• 29 typed layouts. Progressive type refs: load only what you need.

Why this, not just another Excalidraw MCP?

Excalidraw's official MCP is an interactive MCP App: live canvas, streaming draw, remote host. That wins the in-chat surface.

This pack owns the visual-argument methodology: typed layouts, taste gate, audit_diagram, themes, and reproducible PNGs. Use both when you want hands on the official canvas and taste plus publishable output from here. Honest comparison →

Book-proven

This skill drew 77 diagrams for the published technical book From Copilot to Colleague. A curated set ships as source in examples/book; the full corpus is live on the book site.

What ships in v0.1