Diagram Design is an agent skill for Claude Code, Codex and Pi that produces editorial-quality diagrams. No Figma, no generic rounded boxes, no 30-minute color-picking sessions.
28 visual types
Diagram Design ships 28 visual types — architecture, flowchart, sequence, state machine, ER, timeline, swimlane, quadrant, tree, org chart, venn, layers, pyramid, radar, loop and more. Every type comes in three static variants: minimal light, minimal dark, and full-editorial.
Matched to your brand in 60 seconds
The skill reads your website and applies your paper, ink, accent color and fonts, then reports a fidelity receipt naming each element. Your diagrams look like the rest of your site, not like AI-generated placeholders.
Self-contained HTML + SVG
Every diagram is one self-contained HTML file with no build step, no JavaScript and no external dependencies beyond Google Fonts. Open it double-clicked, offline, anywhere.
Import from draw.io and Mermaid
Have an existing diagram? Diagram Design redraws .drawio and Mermaid sources at your chosen format, size and detail level — ready for your deck or docs.
Accessible by default
Screen readers announce the diagram's title and description, and prefers-reduced-motion shows the complete static frame. Quality that holds up in a design review.
Whether you are a writer, developer, consultant or team, Diagram Design gives you diagrams that look intentional — in one step, from your AI agent.