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 mobile-onboardinggit 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/mobile-onboarding)<a href="https://agentmods.dev/skills/nexu-io/open-design/mobile-onboarding"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/mobile-onboarding/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/mobile-onboarding"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/mobile-onboarding.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 | $0.00065 | $0.00385 |
| Opus 5.5 | $0.00026 | $0.00154 |
| Sonnet 5.5 | $0.00013 | $0.00077 |
| Haiku 4.5 | $0.00006 | $0.00038 |
Grade A, and why
mobile-onboarding 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.
Copies of this mod
3 near-identical copies found in the catalogue:
- mobile-onboarding — 100% identical, 0 lines differ
- mobile-onboarding — 97% identical, 3 lines differ
- mobile-onboarding — 91% identical, 3 lines differ
What it actually says
Mobile Onboarding Skill
Produce a three-screen mobile onboarding flow on a single HTML page.
Workflow
- Read DESIGN.md.
- Identify the app + audience.
- Layout: three phone frames side by side. Each phone:
- Status bar (time, battery, signal).
- Hero artwork or icon.
- Headline + supporting paragraph.
- 3-dot pagination.
- Primary CTA (full-width pill button).
- "Skip" or alt action top-right.
- Last phone is the sign-in / continue-with options screen.
- Strong typography, gentle gradients, accessible contrast.
Output contract
<artifact identifier="mobile-onboarding-name" type="text/html" title="Mobile Onboarding">
<!doctype 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.
- 1mo ago First seen · 54 lines · 65 tokens per session scan A 18af747eb2ce
mobile-onboarding is a skill published in the GitHub repository nexu-io/open-design (104,652 stars, last pushed today), licensed Apache-2.0. It adds 65 tokens to every session and 385 once invoked, about $0.0003 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 2026-09-03.
Other skills, from other repositories
gamified-app
A visual template for a game-like habit or task app, shown across three phone screens: a cover, daily quests with experience points, and quest details.
mobile-app
A design template for a single-screen iPhone 15 Pro app mockup, including the phone frame, status bar, app header, main content, and bottom navigation.
mobile-onboarding
A visual template showing three mobile-app onboarding screens side by side: a splash screen, a feature introduction, and sign-in.
deck-swiss-international
A slide-deck template based on Swiss International graphic design: a strict 16-column grid, large clear text, charts, and one fixed bright accent colour. It provides 22 layouts for covers, timelines, comparisons, metrics, and other content.
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.
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.