Individual skill

worker-visualizer

A real-time data/particle/simulation visualizer whose heavy compute runs in a Web Worker (off the main thread), optionally sharing memory with the UI via SharedArrayBuffer, and renders to a canvas at 60fps. Produced as a single self-contained `index.html`. Use when the brief asks for a "web worker", "simulation", "particle system", "physics", "off-main-thread", "fractal", "real-time compute", or "audio/data visualizer". OpenDesign serves this in powered-preview mode so Workers and SharedArrayBuffer actually work.

packages/vscode/assets/open-design/examples/worker-visualizer/SKILL.md

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Scanner rules are current: Yes
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Observed behavior: Network or broad shell
Last checked: Nov 4, 2026

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Repository stars (not skill ratings): 1,045
Repository last updated: Nov 7, 2026
License: MIT

Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.

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SKILL.mdcore · 4,033 bytes
example.htmlasset · 5,624 bytes
open-design.jsonasset · 11,244 bytes

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# Worker Visualizer Skill

Produce a single self-contained `index.html` that moves heavy per-frame compute into a Web Worker and renders the result to a canvas, keeping the main thread at a smooth 60fps.

## Why this is a powered artifact

OpenDesign detects `new Worker(` / `SharedArrayBuffer` / `OffscreenCanvas` and renders this file in **powered preview** — a cross-origin-isolated iframe with `allow-same-origin`. That means external and blob Web Workers construct successfully, `SharedArrayBuffer` is defined (`crossOriginIsolated === true`), and `importScripts` works. In the old opaque sandbox all three failed; here they just work.

## Resource map

```
worker-visualizer/
├── SKILL.md      ← you're reading this
└── example.html  ← a working 12k-particle SharedArrayBuffer sim (READ FIRST)