Diagram Design
cathrynlavery/diagram-design
Creates branded diagrams, from architecture, flowchart and sequence to charts and maps, as self-contained HTML with inline SVG, with import from draw.io, Mermaid and Excalidraw.
Create Excalidraw diagram JSON files that make visual arguments.
Install Excalidraw Diagram
$ npx skills add coleam00/excalidraw-diagram-skill --skill excalidraw-diagram -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install coleam00/excalidraw-diagram-skill excalidraw-diagram --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
Claude Code skills documentation · loads skills from .claude/skills/
Install the "excalidraw-diagram" agent skill from https://github.com/coleam00/excalidraw-diagram-skill/tree/main into .claude/skills/excalidraw-diagram/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "excalidraw-diagram", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add coleam00/excalidraw-diagram-skill --skill excalidraw-diagram -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install coleam00/excalidraw-diagram-skill excalidraw-diagram --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "excalidraw-diagram" agent skill from https://github.com/coleam00/excalidraw-diagram-skill/tree/main into .agents/skills/excalidraw-diagram/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "excalidraw-diagram", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add coleam00/excalidraw-diagram-skill --skill excalidraw-diagram -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install coleam00/excalidraw-diagram-skill excalidraw-diagram --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "excalidraw-diagram" agent skill from https://github.com/coleam00/excalidraw-diagram-skill/tree/main into .cursor/skills/excalidraw-diagram/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "excalidraw-diagram", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add coleam00/excalidraw-diagram-skill --skill excalidraw-diagram -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install coleam00/excalidraw-diagram-skill excalidraw-diagram --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "excalidraw-diagram" agent skill from https://github.com/coleam00/excalidraw-diagram-skill/tree/main into .gemini/skills/excalidraw-diagram/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "excalidraw-diagram", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install coleam00/excalidraw-diagram-skill excalidraw-diagramInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add coleam00/excalidraw-diagram-skill --skill excalidraw-diagram -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "excalidraw-diagram" agent skill from https://github.com/coleam00/excalidraw-diagram-skill/tree/main into .github/skills/excalidraw-diagram/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "excalidraw-diagram", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add coleam00/excalidraw-diagram-skill --skill excalidraw-diagram -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install coleam00/excalidraw-diagram-skill excalidraw-diagram --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "excalidraw-diagram" agent skill from https://github.com/coleam00/excalidraw-diagram-skill/tree/main into .opencode/skills/excalidraw-diagram/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "excalidraw-diagram", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
excalidraw-diagram- GitHub stars
- 5k
- Used in
- 2 other repos
- Token cost
- ~6.1k tokens
- SKILL.md length
- 3,141 words
- Files
- 9 (incl. references)
- Skills in repo
- 1
- Repo updated
- First seen
- Licence
- None found
At a glance
Create Excalidraw diagram JSON files that make visual arguments.
- Works in 7 steps: Assess Depth Required → Understand Deeply → Map Concepts to Patterns → …
- The user wants to visualize workflows
- SKILL.md covers Customization, Core Philosophy, Depth Assessment (Do This First) and Research Mandate (For…, plus 6 more sections
- Runs Python scripts from its folder; calls uv; reaches excalidraw.com
What it does
Excalidraw Diagram is an agent skill from coleam00/excalidraw-diagram-skill. Create Excalidraw diagram JSON files that make visual arguments. Use when the user wants to visualize workflows, architectures, or concepts.
Its SKILL.md is about 6.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 9 other files, including reference files (for example `README.md`, `references/color-palette.md` and `references/element-templates.md`).
It sits in Development, covering Diagrams. It works with Excalidraw. The repository describes itself as: Skill to give Claude Code (and any coding agent) the ability to generate beautiful and practical Excalidraw diagrams.
When your agent uses it
- The user wants to visualize workflows
- Tasks that involve Diagrams
Example prompts
- “/excalidraw-diagram”
Requirements
- Python 3
Workflow steps
7 steps, taken from the step headings in SKILL.md.
- Assess Depth Required
- Understand Deeply
- Map Concepts to Patterns
- Ensure Variety
- Sketch the Flow
- Generate JSON
- Render & Validate (MANDATORY)
What it can do on your machine
Read from SKILL.md and the folder at commit 8646fcc. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships script files (Python), which the agent can run.
Shell commands in SKILL.md call:
uv
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
excalidraw.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Excalidraw Diagram loads about 6.1k tokens when it runs, and up to ~10k if it reads all its reference files. Until then it costs about 40 tokens; SKILL.md has 3,141 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 3,141 words (~6,065 tokens).
“Generate .excalidraw JSON files that argue visually, not just display information.”
- name
- excalidraw-diagram
Files
SKILL.md and 8 other files (references) in the repository root of coleam00/excalidraw-diagram-skill.
- SKILL.md
- .gitignore
- README.md
- references/color-palette.md
- references/element-templates.md
- references/json-schema.md
- references/pyproject.toml
- references/render_excalidraw.py
- references/render_template.html
Open the folder on GitHubat commit 8646fcc
Used in 2 other repositories
We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 2 other GitHub owners. This page covers the copy in coleam00/excalidraw-diagram-skill, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Excalidraw Diagram next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Excalidraw Diagram this skillcoleam00/excalidraw-diagram-skill | 5k | 2 repos | ~6.1k | Automated safety check: Pass | None | |
| Diagram Designcathrynlavery/diagram-design | 49k | 1 repos | ~7.6k | Automated safety check: Pass | MIT | |
| Excalidraw Diagrambreferrari/obsidian-mind | 5k | — | ~3.9k | Automated safety check: Pass | MIT | |
| Excalidraw Skillyctimlin/mcp_excalidraw | 2.5k | — | ~4.6k | Automated safety check: Pass | MIT | |
| Lanshu Animated Architecture Diagramcclank/lanshu-animated-architecture-diagram | 995 | — | ~1.1k | Automated safety check: Pass | MIT | |
| Excalidraw Diagram Studiotech-leads-club/agent-skills | 7k | — | ~3.6k | Automated safety check: Pass | CC-BY-4.0 |
Similar skills
Excalidraw Diagram
breferrari/obsidian-mind
Generate Excalidraw diagrams from text content. An agent skill from breferrari/obsidian-mind.
Excalidraw Skill
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Excalidraw canvas toolkit for creating, editing, and refining diagrams on a live canvas.
Lanshu Animated Architecture Diagram
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Create premium hand-drawn architecture and process diagrams in the Lanshu animated GIF style, with editable .excalidraw files, static PNG previews, and genuinely animated GIFs with moving flow…
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Generates Excalidraw diagram files from plain descriptions, choosing among flowcharts, mind maps, architecture, swimlane, class, sequence and ER diagrams.
Archscribe
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Related
Works with
Categories
Questions about Excalidraw Diagram
What does Excalidraw Diagram do?
Create Excalidraw diagram JSON files that make visual arguments. Excalidraw Diagram is an agent skill from coleam00/excalidraw-diagram-skill. Create Excalidraw diagram JSON files that make visual arguments.
When should I use Excalidraw Diagram?
Excalidraw Diagram fits situations like: the user wants to visualize workflows; tasks that involve Diagrams.
How do I install Excalidraw Diagram in Claude Code?
Run `npx skills add coleam00/excalidraw-diagram-skill --skill excalidraw-diagram -a claude-code`. Or copy the skill folder (the coleam00/excalidraw-diagram-skill repository) into .claude/skills/excalidraw-diagram in your project. Claude Code loads it when a task matches its description.
How do I install Excalidraw Diagram in Codex?
Run `npx skills add coleam00/excalidraw-diagram-skill --skill excalidraw-diagram -a codex`. Or copy the skill folder (the coleam00/excalidraw-diagram-skill repository) into .agents/skills/excalidraw-diagram in your project. Codex loads it when a task matches its description.
Can I use Excalidraw Diagram in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add coleam00/excalidraw-diagram-skill --skill excalidraw-diagram -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/excalidraw-diagram, .gemini/skills/excalidraw-diagram, .github/skills/excalidraw-diagram and .opencode/skills/excalidraw-diagram in your project.
What does Excalidraw Diagram need to run?
Going by SKILL.md and its folder, Excalidraw Diagram needs Python for the scripts in its folder and the command-line tools its instructions call (uv). Our summary lists: Python 3.
Does Excalidraw Diagram access the network?
SKILL.md names 1 domain. In commands or code: excalidraw.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.
Is Excalidraw Diagram safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Excalidraw Diagram use?
No licence was found for Excalidraw Diagram or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Excalidraw Diagram use?
About 6.1k tokens (SKILL.md is roughly 24k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 4.2k tokens, read only when the agent opens those files.
What are the alternatives to Excalidraw Diagram?
Skills that share tags, products or a category with Excalidraw Diagram: Diagram Design (cathrynlavery/diagram-design, 49k stars), Excalidraw Diagram (breferrari/obsidian-mind, 5k stars), Excalidraw Skill (yctimlin/mcp_excalidraw, 2.5k stars) and Lanshu Animated Architecture Diagram (cclank/lanshu-animated-architecture-diagram, 995 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Excalidraw Diagram?
coleam00 (a GitHub user) maintains it in coleam00/excalidraw-diagram-skill, which has 4,979 GitHub stars. The repository was last updated on March 1, 2026.
Source: coleam00/excalidraw-diagram-skill on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.