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 poster-herogit 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/poster-hero)<a href="https://agentmods.dev/skills/nexu-io/open-design/poster-hero"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/poster-hero/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/poster-hero"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/poster-hero.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- 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 | $0.00016 | $0.00564 |
| Opus 5 | $0.00008 | $0.00282 |
| Sonnet 5 | $0.00003 | $0.00113 |
| Haiku 4.5 | $0.00002 | $0.00056 |
Grade A, and why
poster-hero 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 5d 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:
- poster-hero — 100% identical, 0 lines differ
What it actually says
【模板: 营销海报】
- 容器
w-[1080px] h-[1920px] mx-auto, 全屏渐变 / mesh 背景。 - 上部 30% 留白 + 一个大 emoji 或抽象几何图形。
- 中部主标题占视觉中心 (text-8xl, font-black), 一句话副标题。
- 下部信息卡片: 3-5 条核心要点用图标 + 短句。
- 底部右下角放品牌 / 二维码 (用 SVG 占位)。
- 使用大胆的色彩: 渐变背景 (from-violet-500 via-fuchsia-500 to-indigo-500 之类), 文字白色 + 1 个对比色高亮。
- 使用 SVG 做装饰性元素 (圆 / 三角 / 波浪 / 噪点纹理)。
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.
- 5d ago First seen · 43 lines · 16 tokens per session scan A 77a1839c7835
poster-hero is a skill published in the GitHub repository nexu-io/open-design (95,021 stars, last pushed today), licensed Apache-2.0. It adds 16 tokens to every session and 564 once invoked, about $0.0001 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
sprite-animation
A pixel-art educational animation frame with large numbers or dates, a mascot, kinetic text, and a moving timeline. The repeating animation uses CSS keyframes, which are browser rules for changing visual properties over time.
poster-hero
A vertical marketing-poster template for creating a shareable image with a large headline, supporting points, branding, and a QR-code placeholder.
video-hyperframes
A web-based sequence of video frames designed for Hyperframes or Remotion, with each frame presenting one visual idea.
ppt-keynote
A browser-based Keynote-style presentation template where each slide is a full-screen section with keyboard navigation and fade transitions.
magazine-poster
A long-form poster template styled like a Sunday newspaper, with a large serif headline, two text columns, and numbered sections.
deck-presenter-mode
A presentation format for speakers who want written notes and a pop-up teleprompter. A teleprompter shows the current script while the speaker presents.