AI agents like Claude Code and Codex can write code, polish documentation, and automate complex tasks. But ask them to "make a scatter plot of this data" or "show the trend as a heatmap," and they hit a wall. Mermaid tops out at basic bar charts and pie charts — statistical visualization is outside its scope.
dataviz-svg is a skill built to fill that gap. It generates SVG charts from Vega-Lite declarative JSON specs and embeds them directly into Markdown documents.
Where Mermaid Falls Short
Mermaid is a great tool, but it excels in a different domain.
Mermaid's strengths
