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excalidraw-diagram — Claude Code skill: what it does and install

Generates .excalidraw JSON diagram files for technical architectures and workflows. Helps turn system specs or logic into diagrams with real data examples.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓ 
npx skills add coleam00/excalidraw-diagram-skill --skill excalidraw-diagram -a claude-code
Open on GitHub

What excalidraw-diagram does

This skill creates ready-to-use .excalidraw JSON files directly in your repository. Instead of placing vague labeled boxes on a canvas, it builds visual arguments that show real system relationships. Technical diagrams incorporate evidence artifacts such as JSON payloads, code snippets, interface mockups, and exact event names.

The skill structures diagrams across multiple zoom levels, moving from high-level pipelines down to concrete data models. All colors and styling rules depend on references/color-palette.md. You must modify that file directly if you need your diagrams to follow custom brand guidelines.

What it helps with

  • render system architecture as an .excalidraw diagram
  • map protocol event sequences using real payload examples
  • diagram data transformation pipelines with input and output schemas
  • document API integration flows with actual code snippets

Example prompts for the agent

  • Generate an Excalidraw diagram of our auth flow showing exact token payloads
  • Create an .excalidraw file explaining the event streaming pipeline
  • Build an architecture diagram for the backend services with API response examples

How to install excalidraw-diagram

1Skills CLI (Vercel)

npx skills add coleam00/excalidraw-diagram-skill --skill excalidraw-diagram -a claude-code

2Manually: put the files in place

~/.claude/skills/excalidraw-diagram/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/excalidraw-diagram/

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Questions about excalidraw-diagram

How to install excalidraw-diagram in Claude Code?

Run npx skills add coleam00/excalidraw-diagram-skill --skill excalidraw-diagram -a claude-code in your terminal.

What does excalidraw-diagram do?

It generates .excalidraw JSON files depicting technical architectures, workflows, and concepts. It uses real code snippets, concrete data samples, and structural groupings instead of generic placeholder boxes.

Where are diagram colors and styles configured?

All styling resides in references/color-palette.md. The skill inspects this reference file before drawing, making it the single configuration point for custom themes.

See also

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