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 blog-postgit 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/blog-post)<a href="https://agentmods.dev/skills/nexu-io/open-design/blog-post"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/blog-post/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/blog-post"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/blog-post.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- 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 | $0.00057 | $0.00760 |
| Opus 5 | $0.00028 | $0.00380 |
| Sonnet 5 | $0.00011 | $0.00152 |
| Haiku 4.5 | $0.00006 | $0.00076 |
Grade A, and why
blog-post 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 9d 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
6 near-identical copies found in the catalogue:
How it starts
The opening of the file, as written. The whole thing — 81 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Blog Post Skill
Produce a single long-form article page — editorial layout, no chrome.
Workflow
- Read the active DESIGN.md (injected above). Lean into the typography tokens — long-form is 70% type, 20% image, 10% chrome.
- Pick the topic from the brief and write a real article — at least 600 words across 4–6 H2 sections. No lorem ipsum.
- Sections, in order:
- Masthead — small wordmark + 4–6 nav links, plain.
- Article header — category eyebrow, headline (display token, large), deck (1–2 sentence subhead), author name + role + date.
- Hero image — a 16:9 placeholder block using a DS-tinted gradient or solid fill (no external images). Add a 1-line caption underneath.
- Body — alternating prose paragraphs with at least:
- 1 pull quote (large display type, accent rule on the inline-start edge so the layout flips correctly under
dir="rtl"). - 1 figure (image placeholder + caption).
- 1 list (numbered or bulleted).
- 1 inline blockquote.
- 1 pull quote (large display type, accent rule on the inline-start edge so the layout flips correctly under
- Author footer — author avatar (initials in a circle), bio paragraph.
- Related — 3 cards linking to other posts. Each card: tiny image block, title, 1-line excerpt, date.
- Write a single HTML document:
<!doctype html>through</html>, CSS inline.- Article body uses the DS body font, centered, max-width per DS layout rule (typically 680–720px).
- Drop caps (
first-letter) only if the DS mood is editorial / serif — skip on tech-y DSes. data-od-idon the headline, hero, body, pull quote, related grid.
- Self-check:
- Type hierarchy is unambiguous — H1 is clearly the headline; H2s are section dividers; pull quotes do not compete with H1.
- Line length 60–75 chars for body prose.
- Accent appears at most twice (eyebrow + pull-quote rule, or one link).
- The page reads like a magazine, not a marketing landing.
Output contract
Emit between <artifact> tags:
<artifact identifier="post-slug" type="text/html" title="Article Title">
<!doctype html>
<html>...</html>
</artifact>
What ships with it
1 file 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.
- 9d ago First seen · 81 lines · 57 tokens per session scan A 1c44d0284e77
blog-post is a skill published in the GitHub repository nexu-io/open-design (95,021 stars, last pushed today), licensed Apache-2.0. It adds 57 tokens to every session and 760 once invoked, about $0.0003 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 2026-08-30.
Other skills, from other repositories
deck-guizang-editorial
A slide-deck template combining electronic-magazine layouts with an e-ink, printed-paper look. It offers five fixed color palettes and ten reusable page layouts for storytelling and editorial content.
deck-open-slide-canvas
A presentation layout system for freely arranging React components on a fixed 1920×1080 slide canvas. React is a way to build interfaces from reusable pieces.
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.
social-spotify-card
A Spotify-style now-playing card that shows cover art, a title, artist or subtitle, playback progress, and music controls. It can be sized for video overlays or a website hero section.
social-x-post-card
A realistic X post card that displays a profile, handle, post text, optional quoted content or image area, and engagement figures such as likes, reposts, replies, and views. X is the social platform formerly known as Twitter.
video-hyperframes
A web-based sequence of video frames designed for Hyperframes or Remotion, with each frame presenting one visual idea.