OpenDesign is an open-source, local-first desktop app that lets coding agents create prototypes, dashboards, slide decks, images, video, and design systems as exportable files. It is used by people working with agent runtimes such as Claude Code, Codex, Cursor, and DeepSeek Harness. The catalogue add-ons extend the OpenDesign workflow with skills, instructions, commands, and plugins.
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 nexu-io/open-design --skill mockup-device-3dgit clone --depth 1 https://github.com/nexu-io/open-designWrote 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/nexu-io/open-design/mockup-device-3d)<a href="https://agentmods.dev/skills/nexu-io/open-design/mockup-device-3d"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/mockup-device-3d/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/nexu-io/open-design/mockup-device-3d"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/mockup-device-3d.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk fail
- NVIDIA SkillSpector pass
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 | $0.00039 | $0.01367 |
| Opus 5 | $0.00019 | $0.00683 |
| Sonnet 5 | $0.00008 | $0.00273 |
| Haiku 4.5 | $0.00004 | $0.00137 |
Grade A, and why
mockup-device-3d 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 6d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- mockup-device-3d — 100% identical, 0 lines differ
What it actually says
【模板: 设备 3D 展架 (Device 3D Showcase / HTML-in-Canvas)】 【意图】产品发布、App 演示、设计稿展示。把用户提供的 UI 内容真实渲染到 iPhone / MacBook "屏幕"里, 周围用 CSS 3D transform 模拟 GLTF 模型的玻璃 / 高光 / 折射。Inspired by hyperframes vfx-iphone-device。
【硬性构图】
- 画布: 1920×1080, 暖灰渐变背景
radial-gradient(#1a1a1f → #0a0a0f), 底部反射地面 (mirror gradient)。 - iPhone 15 Pro 模型: 左侧 / 中部,
transform: rotateY(-12deg) rotateX(4deg) translateZ(40px); 边框钛金属银#a8a8ad(实心 4px) + 屏幕圆角 56px; 屏幕内嵌 iframe-like div, 真实渲染用户的 HTML 内容 (mobile viewport 375×812)。 - MacBook Pro 14" (可选第二台): 右侧, 略小,
rotateY(8deg); 上盖屏幕嵌入桌面 viewport 内容 (1440×900 缩放); 底座键盘 + trackpad 用 CSS 阴影线条绘制 (不画键帽细节)。 - 玻璃 / 镜头光斑: 顶部加 2-3 个
radial-gradient(ellipse, rgba(255,255,255,0.4) 0%, transparent 60%)的椭圆 highlight, 模拟 morphing glass lens。 - 地面反射: 设备下方
transform: scaleY(-1)+mask-image: linear-gradient(to bottom, rgba(0,0,0,0.4), transparent 70%)。
【屏幕内容来源】
- 用户提供的是文本/数据 → 自动渲染为一个 mock app 界面 (顶部 status bar + 标题 + body + 底部 tab bar 或 home indicator)。
- 用户提供的是 HTML → 原样嵌入屏幕 div 内 (注意缩放 transform 让它适配屏幕宽高)。
- 屏幕内 UI 用 Tailwind, 字号要按 mobile 真实尺寸 (text-sm / text-base, 不要 text-9xl)。
【可选附加元素】
- 右下角 "product slug" 角标: 大 logo + 一行 tagline + 副标 hairline。
- 顶部一行 caption (英文 sans, 字号小, 透明 0.6): 产品 codename / 日期 / 版本。
- 加 8s 自动 CSS 转盘:
@keyframes turntablerotateY -12 ↔ 12, ease-in-out infinite alternate; 可被prefers-reduced-motion关闭。
【设计细节】
- 绝不: 用外部 mockup 图片 URL (任何 unsplash / dribbble link), 全部用 CSS / SVG 绘制设备。
- 字体: 设备外的 caption / logo 用
Inter Tight/SF Pro风格; 设备内根据用户内容自适应。 - 背景可选 4 套调色: charcoal / pearl / midnight blue / mocha; 不要彩虹渐变。
- 单文件 HTML; iframe 不要用 srcdoc 嵌套 (容易出问题), 用
<div class="screen">+ Tailwind 渲染内容。 - 必须用用户真实数据填充屏幕内容, 严禁 lorem ipsum 或 "Your text here"。
What ships with it
2 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.
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.
- 6d ago First seen · 64 lines · 39 tokens per session scan A 76437e765e69
mockup-device-3d is a skill published in the GitHub repository nexu-io/open-design (95,021 stars, last pushed yesterday), licensed Apache-2.0. It adds 39 tokens to every session and 1,367 once invoked, about $0.0002 per session on Opus 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 2026-09-03.
Other skills, from other repositories
mockup-device-3d
A template for presenting app or product interfaces inside CSS-rendered 3D iPhone and MacBook mockups. CSS is the web styling system used to control layout, colors, and visual effects.
mockup-device-3d
Static iPhone and MacBook 3D-style showcase with real HTML embedded on screens, glass-lens refraction, and 360-degree turntable composition.
mockup-device-3d
Static iPhone and MacBook 3D-style showcase with real HTML embedded on screens, glass-lens refraction, and 360-degree turntable composition.
frame-liquid-bg-hero
A design template for a fluid, colorful background with large overlaid text, suitable for a video opening, website landing-page hero, or poster. It offers CSS, canvas, or WebGL approaches, with a static fallback for reduced motion or simpler use.
frame-flowchart-sticky
A single-file HTML template for showing a process or system as a whiteboard with coloured sticky notes, curved arrows, and optional mouse interactions.
prototype-web
A clickable, high-fidelity web product prototype with navigation, a hero section, feature cards, steps, social proof, and optional pricing. It is designed to resemble a finished landing page while remaining a prototype.