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 huashu-golden-circlegit 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/huashu-golden-circle)<a href="https://agentmods.dev/skills/nexu-io/open-design/huashu-golden-circle"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/huashu-golden-circle/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/huashu-golden-circle"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/huashu-golden-circle.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 | $0.00049 | $0.03038 |
| Opus 5 | $0.00024 | $0.01519 |
| Sonnet 5 | $0.00010 | $0.00608 |
| Haiku 4.5 | $0.00005 | $0.00304 |
Grade A, and why
huashu-golden-circle 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 8d 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 — 195 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Golden Circle Diagram · 黄金圆环图解
Produce a single-file, one-diagram concept deck. You are visualizing a
methodology the way Simon Sinek drew the Golden Circle on a TED flip chart:
one geometric master figure carries the entire argument, and every page is
that figure seen from a different angle. The visual system, canvas contract,
and navigation runtime are locked by example.html. Start from
example.html, replace content only — do not rewrite the design or the
script. Do not introduce any color or font outside this spec.
Generated from the 中性派「单图母图概念图解 / Diagrammatic Minimalism」spec in
references/design-styles.md of
huashu-design by 花叔
(alchaincyf), MIT licensed. Lineage: Simon Sinek's Golden Circle TED talk,
Bauhaus geometric abstraction, "one diagram rules the room" information
architecture.
Hard spec (locked — violating any line is a regression)
Canvas & runtime
- One
<div id="stage">fixed at 1920 × 1080 px, centered withposition: fixed; top: 50%; left: 50%; afit()function appliestranslate(-50%, -50%) scale(min(innerWidth/1920, innerHeight/1080))on load andresize. All inner layout in px — the scaler owns responsiveness. - Each page is one
<section class="slide">inside#stagewith adata-screen-label="01 封面"-style label; exactly one slide carries.active; the dark closing page adds.dark. - Navigation (keep the script verbatim):
←/↑/PageUpprevious,→/↓/Space/PageDownnext,Home/Endfirst/last;#/Nhash routing (1-indexed) read on load +hashchange, written viahistory.replaceState; click left third = back, rest = forward; fixed counter pill bottom-right, key-hint bottom-left. No external JS, no build step — the file must open inside a sandboxed iframe viafile://.
Design tokens (:root — keep the names, re-theme values only)
| Token | Value | Role |
|---|---|---|
--paper |
#FAFAF7 |
warm-white page background |
--ink |
#141414 |
primary text |
--night |
#161512 |
dark closing-page background |
--night-ink |
#F5F2EA |
primary text on dark |
--accent |
#E8860C |
the only accent hue (gold) |
--tint-2 |
#F2BA6B |
middle-ring tint of the accent |
--tint-3 |
#FAE5C3 |
outer-ring tint of the accent |
--neutral-2 |
#E8E4D9 |
de-emphasized ring (warm grey) |
--neutral-3 |
#F2EFE7 |
de-emphasized outer ring |
--line |
#E5E1D6 |
hairline rules |
--muted |
#8A867C |
secondary labels |
--muted-2 |
#56524A |
body copy |
--faint |
#B5B0A4 |
tertiary captions |
--night-line |
#3A372F |
hairlines on the dark page |
--display |
'Jost', 'Manrope', 'PingFang SC', … |
uppercase tracked labels |
--sans |
'Manrope', 'PingFang SC', … |
headlines + body |
What ships with it
3 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.
- 8d ago First seen · 195 lines · 49 tokens per session scan A ce14989de6d8
huashu-golden-circle is a skill published in the GitHub repository nexu-io/open-design (95,624 stars, last pushed today), licensed Apache-2.0. It adds 49 tokens to every session and 3,038 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.
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