ChartGPU · hunterg325 · Feb 16, 2026 · Feb 16, 2026 · Feb 16, 2026
diff --git a/.github/workflows/publish-gpr.yml b/.github/workflows/publish-gpr.yml
@@ -0,0 +1,51 @@
+name: Publish to GitHub Packages
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20.x"
+          cache: "npm"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Verify release tag matches package version
+        env:
+          RELEASE_TAG: ${{ github.event.release.tag_name }}
+        run: |
+          node -e "const fs=require('fs');const v=JSON.parse(fs.readFileSync('package.json','utf8')).version;const t=(process.env.RELEASE_TAG||'').replace(/^v/,'');if(!t){console.error('Missing release tag');process.exit(1)};if(t!==v){console.error(`Release tag (${process.env.RELEASE_TAG}) does not match package.json version (${v})`);process.exit(1)};console.log(`Version OK: ${v}`);"
+
+      - name: Build
+        run: npm run build
+
+      # GitHub Packages npm registry requires a scoped package name that matches the owner/org.
+      # We scope it only at publish-time so the source package name can stay unscoped for npmjs.org if desired.
+      - name: Scope package name for GitHub Packages
+        run: |
+          node -e "const fs=require('fs');const p=JSON.parse(fs.readFileSync('package.json','utf8'));p.name='@chartgpu/chartgpu-react';fs.writeFileSync('package.json',JSON.stringify(p,null,2)+'\n');"
+
+      - name: Configure npm for GitHub Packages
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20.x"
+          registry-url: "https://npm.pkg.github.com"
+
+      - name: Publish
+        run: npm publish --registry=https://npm.pkg.github.com
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/README.md b/README.md
@@ -28,10 +28,10 @@
 ## Highlights
 
 - **`ChartGPU` component (recommended)**: async create/dispose lifecycle + debounced `ResizeObserver` sizing
-- **Event props**: `onClick`, `onCrosshairMove`, `onZoomChange`, etc.
-- **Imperative `ref` API**: `ChartGPUHandle` (`getChart`, `getContainer`, `appendData`, `setOption`, `setZoomRange`, `setInteractionX`, `getInteractionX`, `hitTest`)
-- **Hooks**: `useChartGPU(...)`, `useConnectCharts(..., syncOptions?)`
-- **Helper re-exports (from `@chartgpu/chartgpu`)**: `createChart`, `connectCharts`, `createAnnotationAuthoring`
+- **Event props**: `onClick`, `onCrosshairMove`, `onZoomChange`, `onDataAppend`, `onDeviceLost`, etc.
+- **Imperative `ref` API**: `ChartGPUHandle` (`getChart`, `getContainer`, `appendData`, `setOption`, `setZoomRange`, `setInteractionX`, `getInteractionX`, `hitTest`, `needsRender`, `renderFrame`, `getRenderMode`, `setRenderMode`)
+- **Hooks**: `useChartGPU(...)`, `useGPUContext()`, `useConnectCharts(..., syncOptions?)`
+- **Helper re-exports (from `@chartgpu/chartgpu`)**: `createChart`, `connectCharts`, `createPipelineCache`, `getPipelineCacheStats`, `destroyPipelineCache`, `createAnnotationAuthoring`
 
 ## Quick start
 
@@ -85,15 +85,17 @@ Check browser compatibility at [caniuse.com/webgpu](https://caniuse.com/webgpu).
 - **`ChartGPU`** React component (recommended)
   - lifecycle management (async create + dispose)
   - `ResizeObserver` resize (debounced)
-  - event props: `onClick`, `onCrosshairMove`, `onZoomChange`, etc.
-  - imperative `ref` API: `ChartGPUHandle` (`getChart`, `getContainer`, `appendData`, `setOption`, `setZoomRange`, `setInteractionX`, `getInteractionX`, `hitTest`)
+  - event props: `onClick`, `onCrosshairMove`, `onZoomChange`, `onDataAppend`, `onDeviceLost`, etc.
+  - multi-chart dashboards: `gpuContext` prop (share a `GPUDevice` across charts)
+  - imperative `ref` API: `ChartGPUHandle` (`getChart`, `getContainer`, `appendData`, `setOption`, `setZoomRange`, `setInteractionX`, `getInteractionX`, `hitTest`, `needsRender`, `renderFrame`, `getRenderMode`, `setRenderMode`)
 - **Hooks**
-  - `useChartGPU(containerRef, options)` — create/manage a chart instance
+  - `useChartGPU(containerRef, options, gpuContext?)` — create/manage a chart instance (optionally share GPU resources)
+  - `useGPUContext()` — create a shared `GPUAdapter` + `GPUDevice` + `PipelineCache` for multi-chart dashboards
   - `useConnectCharts([chartA, chartB, ...], syncOptions?)` — sync crosshair/interaction-x (and optionally zoom) across charts
 - **Deprecated**
   - `ChartGPUChart` (legacy adapter; use `ChartGPU` instead)
 - **Helper re-exports** (from peer dependency `@chartgpu/chartgpu`)
-  - `createChart`, `connectCharts`, `createAnnotationAuthoring`
+  - `createChart`, `connectCharts`, `createAnnotationAuthoring`, `createPipelineCache`, `getPipelineCacheStats`, `destroyPipelineCache`
 
 For details, start with the [API reference](./docs/API.md).
 
@@ -133,6 +135,56 @@ disconnect();
 
 If you prefer a hook-driven approach, you can use `onReady` (or `useChartGPU`) to capture instances, then call `useConnectCharts(...)` once both are available.
 
+### External render mode (app-owned render loop)
+
+```tsx
+import { useEffect, useRef } from 'react';
+import { ChartGPU } from 'chartgpu-react';
+import type { ChartGPUHandle } from 'chartgpu-react';
+
+function ExternalLoop() {
+  const ref = useRef<ChartGPUHandle>(null);
+
+  useEffect(() => {
+    let raf = 0;
+    const loop = () => {
+      if (ref.current?.needsRender()) {
+        ref.current.renderFrame();
+      }
+      raf = requestAnimationFrame(loop);
+    };
+    raf = requestAnimationFrame(loop);
+    return () => cancelAnimationFrame(raf);
+  }, []);
+
+  return <ChartGPU ref={ref} options={{ ...options, renderMode: 'external' }} />;
+}
+```
+
+### Multi-chart dashboards (shared GPU device + pipeline cache)
+
+```tsx
+import { ChartGPU, useGPUContext } from 'chartgpu-react';
+
+function Dashboard() {
+  const { adapter, device, pipelineCache, isReady, error } = useGPUContext();
+
+  if (error) return <div>{error.message}</div>;
+  if (!isReady || !adapter || !device) return <div>Loading…</div>;
+
+  const gpuContext = pipelineCache
+    ? { adapter, device, pipelineCache }
+    : { adapter, device };
+
+  return (
+    <>
+      <ChartGPU options={optionsA} gpuContext={gpuContext} />
+      <ChartGPU options={optionsB} gpuContext={gpuContext} />
+    </>
+  );
+}
+```
+
 ### Annotation authoring UI (`createAnnotationAuthoring`)
 
 ```tsx

diff --git a/docs/API.md b/docs/API.md
@@ -18,7 +18,7 @@ For an LLM-oriented navigation entrypoint, see [`docs/api/llm-context.md`](./api
 
 ### Hooks
 
-- **`useChartGPU(containerRef, options)`** — create/manage an instance imperatively
+- **`useChartGPU(containerRef, options, gpuContext?)`** — create/manage an instance imperatively (3rd param optional shared context; init-only)
 - **`useConnectCharts([chartA, chartB, ...], syncOptions?)`** — keep crosshair/interaction-x in sync (optionally sync zoom)
 
 See [`docs/api/hooks.md`](./api/hooks.md).
@@ -54,8 +54,8 @@ More recipes:
 
 From `src/types.ts`:
 
-- `ChartGPUProps` — props for the `ChartGPU` component
-- `ChartGPUHandle` — imperative ref API
+- `ChartGPUProps` — props for the `ChartGPU` component. Includes `gpuContext?` (init-only), `onDataAppend?` ↔ `'dataAppend'`, `onDeviceLost?` ↔ `'deviceLost'`
+- `ChartGPUHandle` — imperative ref API (`renderFrame`, `needsRender`, `getRenderMode`, `setRenderMode`, `appendData`, etc.)
 - `ChartInstance` — alias for `@chartgpu/chartgpu`'s `ChartGPUInstance`
 - `ClickParams`, `MouseOverParams` — aliases for event payloads
 - `ZoomRange` — derived from `ChartGPUInstance['getZoomRange']` (non-null range)
@@ -102,9 +102,10 @@ Start here: [`ChartGPU` component docs](./api/chartgpu-component.md).
 
 Use the ref API when you need:
 
-- `appendData` streaming
+- `appendData` streaming (Cartesian series data superset + OHLC array)
 - access to the underlying `ChartGPUInstance`
 - access to the container element (e.g. for annotation authoring UI overlays)
+- external render mode: `renderFrame()`, `needsRender()`, `getRenderMode()`, `setRenderMode()`
 
 See [`ChartGPUHandle` docs](./api/chartgpu-handle.md).
 

diff --git a/docs/GETTING_STARTED.md b/docs/GETTING_STARTED.md
@@ -1,11 +1,11 @@
 # Getting started
 
-`chartgpu-react` is a **thin React + TypeScript wrapper** around the [`chartgpu`](https://www.npmjs.com/package/chartgpu) WebGPU charting library.
+`chartgpu-react` is a **thin React + TypeScript wrapper** around the [`@chartgpu/chartgpu`](https://www.npmjs.com/package/@chartgpu/chartgpu) WebGPU charting library.
 
 ## Install
 
 ```bash
-npm install chartgpu-react chartgpu react react-dom
+npm install chartgpu-react @chartgpu/chartgpu react react-dom
 ```
 
 ## Requirements

diff --git a/docs/api/chartgpu-component.md b/docs/api/chartgpu-component.md
@@ -23,6 +23,7 @@ The props type is `ChartGPUProps` (defined in `src/types.ts`).
 | Prop | Type | Required | Notes |
 |---|---|---:|---|
 | `options` | `ChartGPUOptions` | ✅ | Full chart configuration object. Updates call `setOption(...)` with a full replacement. |
+| `gpuContext` | `ChartGPUCreateContext` |  | **Init-only.** Shared GPU context for multi-chart dashboards. Changing after mount has no effect. |
 | `theme` | `ChartGPUOptions['theme']` |  | Theme override merged into `options` (`'dark' \| 'light' \| ThemeConfig`). |
 | `style` | `React.CSSProperties` |  | Applied to the container `<div>`. Provide an explicit `height`. |
 | `className` | `string` |  | Applied to the container `<div>`. |
@@ -31,6 +32,8 @@ The props type is `ChartGPUProps` (defined in `src/types.ts`).
 | `onMouseOver` | `(payload: ChartGPUEventPayload) => void` |  | Wires to `chart.on('mouseover', ...)`. |
 | `onMouseOut` | `(payload: ChartGPUEventPayload) => void` |  | Wires to `chart.on('mouseout', ...)`. |
 | `onCrosshairMove` | `(payload: ChartGPUCrosshairMovePayload) => void` |  | Wires to `chart.on('crosshairMove', ...)`. |
+| `onDataAppend` | `(payload: ChartGPUDataAppendPayload) => void` |  | Wires to `chart.on('dataAppend', ...)`. Fires when data is appended via `appendData(...)`. |
+| `onDeviceLost` | `(payload: ChartGPUDeviceLostPayload) => void` |  | Wires to `chart.on('deviceLost', ...)`. Most relevant when using shared `gpuContext`. |
 | `onZoomChange` | `(range: ZoomRange) => void` |  | Fires on `zoomRangeChange` event. Also emits the current range once on subscribe (initial hydration). |
 
 ## Imperative ref (`ChartGPUHandle`)
@@ -39,7 +42,10 @@ The props type is `ChartGPUProps` (defined in `src/types.ts`).
 
 - `getChart()`
 - `getContainer()`
-- `appendData(seriesIndex, newPoints)`
+- `appendData(seriesIndex, newPoints)` — accepts Cartesian series data superset or `OHLCDataPoint[]`
+- `renderFrame(): boolean` — render one frame (external mode)
+- `needsRender(): boolean` — whether the chart has pending changes
+- `getRenderMode()`, `setRenderMode(mode)` — external render mode control
 - `setOption(options)`
 - `setZoomRange(start, end)`
 - `setInteractionX(x, source?)`
@@ -55,10 +61,10 @@ See [`ChartGPUHandle`](./chartgpu-handle.md).
 On mount, the component calls:
 
 ```ts
-ChartGPU.create(containerDiv, effectiveOptions)
+ChartGPU.create(containerDiv, effectiveOptions, gpuContext?)
 ```
 
-Where `effectiveOptions` is `options` with `theme` merged in when provided.
+Where `effectiveOptions` is `options` with `theme` merged in when provided. If `gpuContext` is passed, it is used for shared GPU resources (init-only; changing the prop after mount has no effect).
 
 If the component unmounts before async creation completes (common in React 18 StrictMode dev), the newly-created chart instance is disposed immediately to avoid leaks.
 

diff --git a/docs/api/chartgpu-handle.md b/docs/api/chartgpu-handle.md
@@ -5,6 +5,7 @@
 - accessing the underlying `ChartGPUInstance`
 - accessing the container element
 - streaming/append updates (`appendData`)
+- external render mode (`renderFrame`, `needsRender`, `getRenderMode`, `setRenderMode`)
 - replacing options (`setOption`)
 - programmatic zoom control (`setZoomRange`)
 - programmatic crosshair/tooltip (`setInteractionX`, `getInteractionX`)
@@ -42,15 +43,33 @@ Returns the container `<div>` used to mount the chart.
 
 Common use case: pass it to helpers like `createAnnotationAuthoring(container, chart, ...)`.
 
-### `appendData(seriesIndex: number, newPoints: DataPoint[] | OHLCDataPoint[]): void`
+### `appendData(seriesIndex: number, newPoints: CartesianSeriesData | OHLCDataPoint[]): void`
 
 Appends points to an existing series, delegating to `ChartGPUInstance.appendData(...)`.
 
 - **`seriesIndex`**: zero-based index into `options.series`.
-- **`newPoints`**: array of new points. For candlesticks, use `OHLCDataPoint[]`.
+- **`newPoints`**: Cartesian series data superset (`DataPoint[]`, `XYArraysData`, `InterleavedXYData`) or `OHLCDataPoint[]` for candlesticks.
 
 This is typically more efficient than replacing the entire `options.series[n].data` array.
 
+### `renderFrame(): boolean`
+
+Renders a single frame. Intended for external render mode.
+
+- **Returns**: `true` if a frame was rendered, `false` if already clean.
+
+### `needsRender(): boolean`
+
+Returns whether the chart has pending changes that require rendering.
+
+### `getRenderMode(): RenderMode`
+
+Returns the current render mode (`'auto'` or `'external'`).
+
+### `setRenderMode(mode: RenderMode): void`
+
+Sets the render mode. Use `'external'` to drive frames manually via `renderFrame()` based on `needsRender()`.
+
 ### `setOption(options: ChartGPUOptions): void`
 
 Replaces the chart options, delegating to `ChartGPUInstance.setOption(options)`.
@@ -100,6 +119,18 @@ Import the result type if needed:
 import type { ChartGPUHitTestResult } from 'chartgpu-react';
 ```
 
+## External render mode
+
+Set `options.renderMode = 'external'` or call `setRenderMode('external')`, then drive frames yourself:
+
+```ts
+if (handle.current?.needsRender()) {
+  handle.current.renderFrame();
+}
+```
+
+Useful when you need precise control over when the chart renders (e.g. coordinating with other animations or a custom render loop).
+
 ## Example: streaming with `appendData`
 
 ```tsx

diff --git a/docs/api/hooks.md b/docs/api/hooks.md
@@ -2,7 +2,7 @@
 
 This package provides two hooks:
 
-- `useChartGPU(containerRef, options)` — create/manage a `ChartGPUInstance`
+- `useChartGPU(containerRef, options, gpuContext?)` — create/manage a `ChartGPUInstance` (3rd param optional shared context; init-only)
 - `useConnectCharts(charts, syncOptions?)` — connect instances for synced crosshair/interaction-x (and optionally zoom)
 
 Related:
@@ -11,35 +11,38 @@ Related:
 - [Chart sync recipe](../recipes/chart-sync.md)
 - LLM entrypoint: [`llm-context.md`](./llm-context.md)
 
-## `useChartGPU(containerRef, options)`
+## `useChartGPU(containerRef, options, gpuContext?)`
 
 Creates a `@chartgpu/chartgpu` chart instance inside a DOM element that you control.
 
 ### Import
 
 ```ts
 import { useChartGPU } from 'chartgpu-react';
-import type { ChartGPUOptions } from 'chartgpu-react';
+import type { ChartGPUOptions, ChartGPUCreateContext } from 'chartgpu-react';
 ```
 
 ### Signature
 
 ```ts
 function useChartGPU(
   containerRef: React.RefObject<HTMLElement>,
-  options: ChartGPUOptions
+  options: ChartGPUOptions,
+  gpuContext?: ChartGPUCreateContext
 ): {
   chart: ChartGPUInstance | null;
   isReady: boolean;
   error: Error | null;
 }
 ```
 
+The 3rd parameter `gpuContext` is **init-only**: it is only read during chart creation. Changing it after mount has no effect.
+
 ### Behavior
 
 - On mount:
   - checks WebGPU support (`'gpu' in navigator`)
-  - calls `ChartGPU.create(containerRef.current, options)`
+  - calls `ChartGPU.create(containerRef.current, options, gpuContext?)`
   - sets `chart`, `isReady`, and `error` accordingly
 - On `options` change:
   - calls `chart.setOption(options)` (full replacement)