One repo this week, and it sits in a single theme. It is an agent skill that draws diagrams and takes its look from your own website.
Agent skills and plugins
diagram-design is an agent skill that draws 45 diagram types as self-contained HTML+SVG files. It is written in HTML and has 59,265 stars.
What it adds to this theme is a strict approach to layout and style. The skill has the agent place every node on a 4px grid, and CI overlap checks catch nodes that collide. The style is editorial and opinionated, and it is pulled from the palette and fonts of your own website, so the output matches your brand. The README’s pitch is no shadows and no Mermaid slop.
Its tag is Agent Skills, and the review files it under the interface dimension.