Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add veelenga/preview-skills --skill preview-threejsgit clone --depth 1 https://github.com/veelenga/preview-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/veelenga/preview-skills/preview-threejs)<a href="https://agentmods.dev/skills/veelenga/preview-skills/preview-threejs"><img src="https://agentmods.dev/badge/skills/veelenga/preview-skills/preview-threejs/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/veelenga/preview-skills/preview-threejs"><img src="https://agentmods.dev/badge/skills/veelenga/preview-skills/preview-threejs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00022 | $0.02325 |
| Opus 5.5 | $0.00009 | $0.00930 |
| Sonnet 5.5 | $0.00004 | $0.00465 |
| Haiku 4.5 | $0.00002 | $0.00232 |
Grade A, and why
preview-threejs scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 356 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Preview Three.js Skill
Interactive Three.js 3D visualization viewer with pre-configured scene, camera, lighting, and orbit controls.
Agent Usage
When the user asks to create a 3D visualization, write the Three.js code and pipe it to the script. Use the Bash tool to execute this skill's run.sh script:
# Pipe Three.js code
cat scene.js | ./run.sh
# Or from a file
./run.sh model.threejs
The script handles all HTML generation and automatically opens the result in the browser. Do NOT open the file manually to avoid duplicate tabs.
Usage
# Preview a Three.js visualization file
/preview-threejs solar-system.threejs
# Or use .3d extension
/preview-threejs model.3d
# Pipe Three.js code (preferred for temporary content)
cat visualization.js | /preview-threejs
echo "const cube = new THREE.Mesh(...);\nscene.add(cube);" | /preview-threejs
Best Practice: For temporary or generated 3D scenes, prefer piping over creating temporary files. This avoids cluttering your filesystem and the content is automatically cleaned up.
Options
The script works with sensible defaults but supports these flags for flexibility:
-o, --output PATH- Custom output path--no-browser- Skip browser, output file path only
Features
- 3D rendering with WebGL
- Orbit controls - Drag to rotate, scroll to zoom, right-click to pan
- Pre-configured lighting - Ambient + directional lights ready
- Animation loop with customAnimate callback
- Reset view button
- Code viewer toggle
- Responsive design adapts to window size
When to Use This Skill
Use this skill when the user wants to:
- Create 3D visualizations and models
- Render geometric shapes and patterns
- Visualize 3D data
- Create interactive 3D scenes
- Prototype 3D animations
Three.js Code Requirements
Your code should:
- Create geometries and materials
- Create meshes and add them to the
scene - Optionally define
scene.userData.customAnimatefor animation
What ships with it
12 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- config.sh 978 B runs code
- lib/browser-utils.sh 9.5 KB runs code
- lib/content-utils.sh 6.7 KB runs code
- lib/html-generator.sh 14 KB runs code
- run.sh 7.5 KB runs code
- templates/scripts/common-ui.js 5.1 KB runs code
- templates/scripts/threejs-renderer.js 4.9 KB runs code
- templates/scripts/utils.js 1.8 KB runs code
- templates/styles/common.css 1.6 KB
- templates/styles/layout.css 14 KB
- templates/styles/threejs.css 2.5 KB
- templates/user-code-template.html 236 B
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 356 lines · 22 tokens per session scan A f2c661b12242
preview-threejs is a skill published in the GitHub repository veelenga/preview-skills (9 stars, last pushed 5d ago), licensed MIT. It adds 22 tokens to every session and 2,325 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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