Spins up interactive ECharts visualizations with proper project scaffolding. Each chart gets its own folder under output/chart-html with HTML, data snapshot, generation script, and PNG export. Ships with nine templates covering the usual suspects: line, bar, candlestick, plus a few nice ones like dual-axis for different scales and multi-panel for stacked indicators. The export logic uses ECharts native getDataURL instead of fighting with external screenshot tools, and the preview server rewrites paths so iframe serving actually works. Good for when you need a chart that lives beyond the conversation, not just a throwaway plot.
npx skills add https://github.com/starchild-ai-agent/official-skills --skill chart