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Diagram Design

Diagram Design is an agent skill (a SKILL.md file) from cathrynlavery/diagram-design. Create branded architecture, architecture delta, IT current-state, flowchart, sequence, state machine, ER/data model, timeline, swimlane, quadrant, radar/spider, polar chart (polar/radial lollipop). It works with Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot and OpenCode and has 61,168 GitHub stars.

github.com/cathrynlavery/diagram-design/skills/diagram-design (opens in a new tab)

Data as of from the GitHub API and skills.sh; description from the skill's SKILL.md. Report an error

View on GitHub (opens in a new tab)View on skills.sh (opens in a new tab)

Add this skill

Claude

This repository is a Claude Code plugin marketplace. In Claude Code:

/plugin marketplace add cathrynlavery/diagram-design
/plugin install diagram-design@diagram-design

In the Claude apps, zip the diagram-design folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

ChatGPT / Codex

Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:

git clone --depth 1 https://github.com/cathrynlavery/diagram-design.git
cp -r diagram-design/skills/diagram-design .agents/skills/diagram-design   # repo; ~/.agents/skills for all projects

Standalone skills also load in the ChatGPT desktop app.

Cursor

Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:

git clone --depth 1 https://github.com/cathrynlavery/diagram-design.git
cp -r diagram-design/skills/diagram-design .cursor/skills/diagram-design   # project; ~/.cursor/skills for all projects

Source (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), code.claude.com/docs/en/plugin-marketplaces (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)

What this skill does

Create branded architecture, architecture delta, IT current-state, flowchart, sequence, state machine, ER/data model, timeline, swimlane, quadrant, radar/spider, polar chart (polar/radial lollipop), loop/flywheel, nested, tree, org chart, layer stack, exploded axonometric, axonometric plan, Venn, pyramid/funnel, treemap and marimekko, heatmap, bar and dumbbell, waterfall, line (slopegraph, ridgeline, streamgraph, bump), Gantt and scatter charts (bubble, beeswarm), high-level, process,…

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FAQ

Diagram Design FAQ

Still curious? Email info@appsgit.com.

How do I install the Diagram Design skill?

In Claude Code, run /plugin marketplace add cathrynlavery/diagram-design and then /plugin install diagram-design@diagram-design. For Codex or Cursor, copy the diagram-design folder into .agents/skills/ or .cursor/skills/.

Is the Diagram Design skill free?

Yes. The repository is open source under the MIT license.

Is Diagram Design maintained?

The repository's most recent commit was on Oct 25, 2026. appsgit only lists skills from repositories with a commit in the last six months.