# OpenSpec Change: enterprise-react-charts

- **Change ID**: enterprise-react-charts
- **Package**: `@suaveplan/react-charts`
- **Category**: react
- **Target path**: `react/ui/react-charts`
- **Status**: PROPOSED
- **Date**: 2026-04-24
- **Reference spec**: `/mnt/s/web/suaveplan/enterprise/react-charts.md`

---

## Summary

Deliver `@suaveplan/react-charts` on genesis from scratch at enterprise quality. A hybrid SVG+Canvas+HTML React charting library: Canvas carries data marks (high-DPI via `devicePixelRatio`), SVG carries crisp axes/grid/crosshair, HTML overlay handles pointer events and renders tooltip + legend. Ships twelve chart types (line, bar, area, pie, scatter, composed, funnel, gauge, heatmap, radar, radial-bar, treemap), headless hooks (`useChart`, `useScales`, `useCanvas`, `useTooltip`, `useAnimation`, `useZoomPan`), shared UI components (axes, grid, legend, tooltip, crosshair, brush, data-label, reference-area, reference-line), `ChartProvider`/`ChartContainer`, OTel instrumentation, and 100% test + docs coverage.

---

## Current-state audit (genesis)

Package does not exist on genesis — fresh build.

---

## Available workspace deps on genesis

| Package | Role |
|---|---|
| `@suaveplan/error` (`workspace:^`) | `ChartError` base class |
| `@suaveplan/types` (`workspace:^`) | `LoggerLike` |
| `@suaveplan/react-translate` (`workspace:^`) | i18n for axis/legend labels |
| `zod` (`catalog:forms`) | Chart config schemas |
| `@opentelemetry/api` (`catalog:observability`) | `chart.render` span |

External: `clsx catalog:ui`, `tailwind-merge catalog:ui`, `tslib catalog:build`. React 18 peer.

---

## Preserved public API surface

### Chart components

`LineChart`, `BarChart`, `AreaChart`, `PieChart`, `ScatterChart`, `ComposedChart`, `FunnelChart`, `GaugeChart`, `HeatmapChart`, `RadarChart`, `RadialBarChart`, `TreemapChart`

### Shared UI

`Axis` (X + Y), `Grid`, `Legend`, `Tooltip`, `Crosshair`, `Brush`, `DataLabel`, `ReferenceArea`, `ReferenceLine`, `ChartContainer`, `ChartProvider`, `useChartContext`

### Hooks

`useChart`, `useScales`, `useCanvas`, `useTooltip`, `useAnimation`, `useZoomPan`

### Utils

Math utilities (`clamp`, `lerp`, `normalizeData`), color utilities (`colorSchemes`, `interpolateColor`), path utilities (`linePath`, `areaPath`, `arcPath`), data utilities (`groupBy`, `stack`, `bin`)

---

## New additions for genesis

1. **`@suaveplan/error`-backed `ChartError`** — codes: `CHART_INVALID_DATA`, `CHART_RENDER_FAILED`, `CHART_CANVAS_ERROR`.
2. **Zod chart config schemas** — `LineChartConfigSchema`, `BarChartConfigSchema`, etc. validated in `ChartProvider`.
3. **Accessible charts** — every chart renders `<title>` + `<desc>` SVG elements; keyboard-navigable legend with focus ring.
4. **OTel `chart.render` span** — attributes: `chart.type`, `chart.data_points`.
5. **Stories** — every chart type with default, animated, interactive-tooltip, dark-mode, and a11y stories.
6. **CSS custom property theming** — `prefers-color-scheme` auto-detection; `.dark` class override.

---

## File layout

```text
react/ui/react-charts/
  package.json
  tsconfig.json
  vitest.config.ts
  src/
    index.ts
    provider/
      chart-provider/ (tsx + types + md + test + index)
      chart-container/ (tsx + types + md + test + index)
    charts/
      line-chart/ (tsx + types + md + test + stories + index)
      bar-chart/ ...
      area-chart/ ...
      pie-chart/ ...
      scatter-chart/ ...
      composed-chart/ ...
      funnel-chart/ ...
      gauge-chart/ ...
      heatmap-chart/ ...
      radar-chart/ ...
      radial-bar-chart/ ...
      treemap-chart/ ...
    components/
      axis/ (tsx + types + md + test + index)
      grid/ legend/ tooltip/ crosshair/ brush/ data-label/
      reference-area/ reference-line/
    hooks/
      use-chart/ use-scales/ use-canvas/ use-tooltip/
      use-animation/ use-zoom-pan/
    utils/
      math/ color/ path/ data/
    styles/
      charts.css
  tests/
    integration.test.tsx
  e2e/
    charts.spec.ts
```