Agent 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…

Apache-2.0Auto-check passed

Install Worker Visualizer

skills CLI

$ npx skills add nexu-io/open-design --skill worker-visualizer -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install nexu-io/open-design worker-visualizer --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .claude/skills && cp -r skills-src/design-templates/worker-visualizer .claude/skills/worker-visualizer && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "worker-visualizer" agent skill from https://github.com/nexu-io/open-design/tree/main/design-templates/worker-visualizer into .claude/skills/worker-visualizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "worker-visualizer", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/nexu-io/open-design/tree/main/design-templates/worker-visualizer

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add nexu-io/open-design --skill worker-visualizer -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install nexu-io/open-design worker-visualizer --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .agents/skills && cp -r skills-src/design-templates/worker-visualizer .agents/skills/worker-visualizer && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "worker-visualizer" agent skill from https://github.com/nexu-io/open-design/tree/main/design-templates/worker-visualizer into .agents/skills/worker-visualizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "worker-visualizer", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add nexu-io/open-design --skill worker-visualizer -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install nexu-io/open-design worker-visualizer --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/design-templates/worker-visualizer .cursor/skills/worker-visualizer && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "worker-visualizer" agent skill from https://github.com/nexu-io/open-design/tree/main/design-templates/worker-visualizer into .cursor/skills/worker-visualizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "worker-visualizer", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/nexu-io/open-design.git --path design-templates/worker-visualizer

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add nexu-io/open-design --skill worker-visualizer -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install nexu-io/open-design worker-visualizer --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/design-templates/worker-visualizer .gemini/skills/worker-visualizer && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "worker-visualizer" agent skill from https://github.com/nexu-io/open-design/tree/main/design-templates/worker-visualizer into .gemini/skills/worker-visualizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "worker-visualizer", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install nexu-io/open-design worker-visualizer

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add nexu-io/open-design --skill worker-visualizer -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .github/skills && cp -r skills-src/design-templates/worker-visualizer .github/skills/worker-visualizer && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "worker-visualizer" agent skill from https://github.com/nexu-io/open-design/tree/main/design-templates/worker-visualizer into .github/skills/worker-visualizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "worker-visualizer", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add nexu-io/open-design --skill worker-visualizer -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install nexu-io/open-design worker-visualizer --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/design-templates/worker-visualizer .opencode/skills/worker-visualizer && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "worker-visualizer" agent skill from https://github.com/nexu-io/open-design/tree/main/design-templates/worker-visualizer into .opencode/skills/worker-visualizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "worker-visualizer", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: worker-visualizer
GitHub stars: 100k
Token cost: ~998 tokens
SKILL.md length: 356 words
Files: 2
Skills in repo: 245
Repo updated: Oct 8, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

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…

Works in 5 steps: Read the reference → Choose the workload → Build index.html → …
The brief asks for a web worker
SKILL.md covers Why this is a powered artifact, Resource map and Workflow
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Worker Visualizer is an agent skill from nexu-io/open-design. 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.

Its SKILL.md is about 1000 tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file.

The repository describes itself as: 🎨 Best DeepSeek Harness Design Plugin. The open-source Claude Design alternative. 🖥️ Local-first desktop app. 🖼️ Your coding agent becomes the design engine: prototypes… The licence is Apache-2.0.

When your agent uses it

The brief asks for a web worker
Particle system
Off-main-thread
Real-time compute

Example prompts

“web worker”
“simulation”
“particle system”
“/worker-visualizer”

Workflow steps

5 steps, taken from the step headings in SKILL.md.

Read the reference
Choose the workload
Build index.html
Overlay + brand
Self-review (P0)

What it can do on your machine

Read from SKILL.md and the folder at commit 3449fa6. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Worker Visualizer loads about 998 tokens when it runs. Until then it costs about 134 tokens; SKILL.md has 356 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~134
When it runs · the whole SKILL.md, loaded when a task matches: ~998

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from nexu-io/open-design at commit 3449fa6, republished under its Apache-2.0 licence (© nexu-io). 356 words, ~998 tokens.

Download SKILL.mdSave it as .claude/skills/worker-visualizer/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: worker-visualizer
description: 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.
triggers: web worker, worker, simulation, particle system, physics sim, fractal, off main thread, sharedarraybuffer, real-time compute, visualizer, 多线程, 粒子
od.mode: prototype
od.platform: web
od.scenario: design

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

Step 0 — Read the reference

Read example.html. Note the split: the worker integrates positions each tick; the main thread only reads + draws. It feature-detects crossOriginIsolated and uses a SharedArrayBuffer for zero-copy when available, falling back to a transferable postMessage copy otherwise. Always ship that fallback so the artifact still animates if isolation is off.

Step 1 — Choose the workload

Pick ONE compute-bound job worth offloading:

Particle / N-body field (default): thousands of bodies with a cheap force law.
Fractal: Mandelbrot/Julia escape-time into an ImageData buffer.
Cellular automata / reaction-diffusion: grid updated in the worker.
Data/audio visualizer: transform a stream into bars/rings each frame.

Show full SKILL.md (167 more words)Show less

Step 2 — Build `index.html`

One file, zero external requests. Build the worker from a Blob + URL.createObjectURL (inline its source), or embed it as a data: URL.
Prefer SharedArrayBuffer for large per-frame state: allocate on the main thread, pass the SharedArrayBuffer to the worker, and read the same Float32Array/Uint8ClampedArray view while drawing. Guard on typeof SharedArrayBuffer !== 'undefined' && crossOriginIsolated.
Fallback path: if not isolated, postMessage a transferable ArrayBuffer each frame.
Consider OffscreenCanvas + canvas.transferControlToOffscreen() to render inside the worker for the heaviest scenes.

Step 3 — Overlay + brand

HUD with the title and 2–3 live stat tiles (particle count, transport mode, fps). Map accent color to the active DESIGN.md when present; otherwise a dark ground with one vivid accent.

Step 4 — Self-review (P0)

Worker constructs with no SecurityError; sim runs.
Main-thread render holds ~60fps under the full workload.
SharedArrayBuffer path engages when crossOriginIsolated is true; postMessage fallback engages otherwise — verify BOTH branches degrade cleanly.
No unbounded growth: velocities/positions stay stable over minutes.
The "Transport" stat truthfully reports which path is live.

Files

SKILL.md and 1 other file in design-templates/worker-visualizer of nexu-io/open-design.

SKILL.md
example.html

Open the folder on GitHubat commit 3449fa6

Compare with similar skills

Worker Visualizer next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Worker Visualizer compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Worker Visualizer this skillnexu-io/open-design	100k	—	~998	Automated safety check: Pass	Apache-2.0	today
Visualizeopenclaw/openclaw	392k	—	~2.4k	Automated safety check: Pass	MIT	today
Visual Stylecalesthio/OpenMontage	65k	—	~1.5k	Automated safety check: Pass	AGPL-3.0	5 days ago
Visual Regressionthedaviddias/Front-End-Checklist	74k	—	~493	Automated safety check: Pass	MIT	2 days ago
Visualizecode-yeongyu/oh-my-openagent	70k	—	~954	Automated safety check: Pass	Custom licence	today
Chart Visualizationbytedance/deer-flow	83k	2 repos	~840	Automated safety check: Pass	MIT	today

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Questions about Worker Visualizer

What does Worker Visualizer do?

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…. Worker Visualizer is an agent skill from nexu-io/open-design. 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.

When should I use Worker Visualizer?

Worker Visualizer fits situations like: the brief asks for a web worker; particle system; off-main-thread; real-time compute.

How do I install Worker Visualizer in Claude Code?

Run `npx skills add nexu-io/open-design --skill worker-visualizer -a claude-code`. Or copy the skill folder (design-templates/worker-visualizer in nexu-io/open-design) into .claude/skills/worker-visualizer in your project. Claude Code loads it when a task matches its description.

How do I install Worker Visualizer in Codex?

Run `npx skills add nexu-io/open-design --skill worker-visualizer -a codex`. Or copy the skill folder (design-templates/worker-visualizer in nexu-io/open-design) into .agents/skills/worker-visualizer in your project. Codex loads it when a task matches its description.

Can I use Worker Visualizer in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add nexu-io/open-design --skill worker-visualizer -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/worker-visualizer, .gemini/skills/worker-visualizer, .github/skills/worker-visualizer and .opencode/skills/worker-visualizer in your project.

What does Worker Visualizer need to run?

SKILL.md names no scripts, command-line tools or credentials: Worker Visualizer is instructions for the agent only.

Does Worker Visualizer access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Worker Visualizer safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Worker Visualizer use?

Worker Visualizer is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Worker Visualizer use?

About 998 tokens (SKILL.md is roughly 4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Worker Visualizer?

Skills that share tags, products or a category with Worker Visualizer: Visualize (openclaw/openclaw, 392k stars), Visual Style (calesthio/OpenMontage, 65k stars), Visual Regression (thedaviddias/Front-End-Checklist, 74k stars) and Visualize (code-yeongyu/oh-my-openagent, 70k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Worker Visualizer?

nexu-io (a GitHub organization) maintains it in nexu-io/open-design, which has 99,905 GitHub stars. The repository holds 245 skills in this directory. The repository was last updated on October 8, 2026.

Source: nexu-io/open-design on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Worker Visualizer

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Worker Visualizer Skill

Why this is a powered artifact

Resource map

Workflow

Step 0 — Read the reference

Step 1 — Choose the workload

Step 2 — Build index.html

Step 3 — Overlay + brand

Step 4 — Self-review (P0)

Files

Compare with similar skills

Similar skills

More from nexu-io/open-design

Questions about Worker Visualizer

Step 2 — Build `index.html`