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 contact-widgetgit 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/contact-widget)<a href="https://agentmods.dev/skills/nexu-io/open-design/contact-widget"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/contact-widget/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/contact-widget"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/contact-widget.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 | $0.00029 | $0.01578 |
| Opus 5 | $0.00015 | $0.00789 |
| Sonnet 5 | $0.00006 | $0.00316 |
| Haiku 4.5 | $0.00003 | $0.00158 |
Grade A, and why
contact-widget 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.
How it starts
The opening of the file, as written. The whole thing — 132 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Contact Widget
What this skill produces
A single self-contained HTML file with a floating chat widget that includes:
- Chat bubble — fixed bottom-right circular button, opens/closes the panel
- Welcome home screen — agent avatar + name + online status + greeting message
- Message input — text field with emoji/send icons (UI only; wire to your own backend)
- Social links — row of circular icons (Telegram, WhatsApp, Instagram, Messenger, Discord, Slack — only the ones the user provides)
- Meeting card — optional "Book a meeting" entry with calendar icon, links to user-provided URL (Calendly, Cal.com, Lark, etc.)
- Offline form — fallback contact form (name, email, message) when
is_available=false - Mobile responsive — full-width on small viewports
Output is pure front-end. No tracking, no phone-home, no required external services. Works offline once loaded.
Design direction
Clean, minimal SaaS aesthetic. Looks like a real product widget, not a toy demo:
- Typography: Inter (Google Fonts), 14px base, semi-bold headings
- Colors: A single user-chosen
primary_colordrives the bubble, avatar, send button, and accent. Everything else is a neutral slate palette (#1e293b/#64748b/#f1f5f9). No purple gradients, no glassmorphism, no AI-style rainbow accents. - Radius: 16px on cards, full-round on bubble and avatars
- Shadows: Subtle
0 8px 32px rgba(0,0,0,0.12)on the widget panel,0 4px 12pxon bubble - Spacing: 16px internal padding, 12px gaps between elements
- States: Hover darkens buttons ~5%, active scales bubble 0.95
Inputs
The skill accepts these parameters from the user:
| Input | Type | Default | Description |
|---|---|---|---|
primary_color |
color | #4F7CFF |
Drives bubble, header, send button, accents |
agent_name |
string | Assistant |
Displayed in header greeting |
greeting |
string | Hello! How can I help you today? |
Subtitle in header |
is_available |
boolean | true |
Online status; false shows offline form |
social_telegram |
string | (empty) | Telegram link — omitted if empty |
social_whatsapp |
string | (empty) | WhatsApp link — omitted if empty |
social_instagram |
string | (empty) | Instagram link — omitted if empty |
meeting_url |
string | (empty) | Booking URL (Calendly, Cal.com, etc.) — omitted if empty |
offline_message |
string | We're currently offline. Leave a message and we'll get back to you! |
Shown when is_available=false |
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 · 132 lines · 29 tokens per session scan A dfa37f9b2203
contact-widget is a skill published in the GitHub repository nexu-io/open-design (95,021 stars, last pushed today), licensed Apache-2.0. It adds 29 tokens to every session and 1,578 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 2026-08-30.
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