Diagram Design
An open-source Claude Code and Codex skill that helps developers and content teams create branded architecture, flow, timeline, and other diagrams as self-contained HTML and SVG.
Tool overview
Adoption judgment: Diagram Design is worth trying for teams already using Claude Code or Codex and regularly producing technical documentation, product material, or proposal visuals. The available evidence establishes a clear feature position and strong attention, but not yet long-term reliability, quality on complex diagrams, or production maturity. The GitHub repository is the most direct project evidence: it describes nearly 30 editorial diagram types and self-contained HTML + SVG output. Several X posts repeat the claims about matching a website’s branding and reducing manual redraw work.
Its practical role is not simply turning a prompt into a bitmap image. It is a diagram-generation skill used inside Claude Code and Codex, producing structured visual artifacts such as architecture diagrams, flowcharts, timelines, and quadrant charts. It can read a website’s colors and fonts to attempt a consistent brand treatment, then return HTML and SVG that can be used as standalone assets. It is not a standalone drag-and-drop diagram editor, a general image generator, a Mermaid renderer, or a Figma replacement.