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)

Workflow