This is Apache ECharts wrapped as a Claude skill, giving you the sweet spot between Chart.js simplicity and D3.js power. It handles 20+ chart types including geo maps, renders 100k+ data points without choking, and ships with full TypeScript definitions. The sub-skills cover the basics like line charts and responsive design, plus practical stuff like loading CSV data and wiring up events. ECharts shines when you need interactive dashboards that work on mobile and desktop without fighting the library. If you're building anything beyond throwaway bar charts but don't want to wrestle with D3's learning curve, this is your move.
npx skills add https://github.com/vamseeachanta/workspace-hub --skill echarts