nextreme-charts
Installation
SKILL.md
Ultimate Charts
A unified charting skill centered on Vega-Lite — the most LLM-friendly, publication-grade declarative chart grammar. For the ~10% of chart types Vega-Lite doesn't handle natively, it falls back to full Vega (same toolchain, same themes). Two alternative engines (QuickChart.io, ECharts) are available for specific use cases.
Engine Selection
| Context | Primary Engine | Output | Why |
|---|---|---|---|
| Papers, reports, docs | Vega-Lite | SVG — vector, publication-grade | Themed (McKinsey/BCG/FT/Economist), offline, YAML specs |
| Exotic charts (candlestick, sankey, waterfall, radar, treemap) | Vega (full grammar) | SVG | Same render.mjs, same theme system, just a --vega flag |
| Quick one-off PNG | QuickChart.io | PNG | Zero deps, natural language input, light/dark built-in |
| Interactive dashboards / BI | Apache ECharts | Interactive HTML | 11 templates, live filtering, multi-panel layouts |
| Headless server / bots | Vega-Lite + Sharp | PNG | ~15MB, <500ms cold start, no browser |