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-sparkline-arcgit 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-sparkline-arc)<a href="https://agentmods.dev/skills/nexu-io/open-design/huashu-sparkline-arc"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/huashu-sparkline-arc/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-sparkline-arc"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/huashu-sparkline-arc.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 | $0.00044 | $0.03050 |
| Opus 5 | $0.00022 | $0.01525 |
| Sonnet 5 | $0.00009 | $0.00610 |
| Haiku 4.5 | $0.00004 | $0.00305 |
Grade A, and why
huashu-sparkline-arc 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 — 190 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Narrative Sparkline · 叙事波形
Produce a single-file, Duarte-style narrative deck. You are a story
cartographer working in HTML: every page is built on one oscillating waveform
that travels between "what is" and "what could be", and orange appears only
where the story turns. 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 Sparkline叙事波形 / Narrative Sparkline (Duarte式) spec
(中性派, 还原91%) in references/design-styles.md of
huashu-design by 花叔
(alchaincyf), MIT licensed. Lineage: Nancy Duarte《Resonate》sparkline
structure, Al Gore An Inconvenient Truth, Duarte Inc. data storytelling.
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; dark pages add.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 |
#FFFFFF |
light page background |
--night |
#0E0E0C |
dark pages (solo-line, closing) |
--ink |
#1A1814 |
primary text on light |
--night-ink |
#F5F3EE |
primary text on dark |
--accent |
#FF6B2C |
the brand orange — the only accent |
--accent-dim |
rgba(255,107,44,.14) |
annotation halos / soft fills |
--ghost |
#C9C7C2 |
greyed comparison waveform |
--grid |
#ECEAE6 |
hairline rules |
--muted |
#9A958C |
secondary labels |
--muted-2 |
#5F5A52 |
body copy on light |
--night-line |
#26241F |
hairlines on dark pages |
--night-mut |
#8A857C |
secondary text on dark |
--sans |
'Inter', 'PingFang SC', …, sans-serif |
headlines + body |
--mono |
'Geist Mono', 'SFMono-Regular', 'Menlo', monospace |
labels, annotations, numerals |
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 · 190 lines · 44 tokens per session scan A 45be61bbcb85
huashu-sparkline-arc is a skill published in the GitHub repository nexu-io/open-design (95,624 stars, last pushed today), licensed Apache-2.0. It adds 44 tokens to every session and 3,050 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.
Other skills, from other repositories
huashu-sparkline-arc
Open Design's revenue-driver narrative: what actually moves ARR, the leverage points, and the forecast. Built as a decision-grade data & finance deck for board, finance leadership.
ve-midnight-editorial
Open Design's financial review: runway, burn, and the sustainability plan that keeps the project independent. Built as a decision-grade data & finance deck for board, leadership.
html-ppt-zhangzara-long-table
Open Design's unit-economics and BYOK cost model: the assumptions, the sensitivity, and why it scales. Built as a decision-grade data & finance deck for CFO, investors.
hps-y2k-chrome
Open Design's KPI decision brief: activation and retention drivers, what's working, and the one metric to move next. Built as a decision-grade data & finance deck for CRO, RevOps, leadership.
html-ppt-weekly-report
Open Design's weekly growth review: stars, installs, activation — the number, the driver, and the recommended move. Built as a decision-grade data & finance deck for growth & product team.
weekly-update
Open Design's weekly metrics standup: this week's numbers, the one anomaly, and the single decision it forces. Built as a decision-grade data & finance deck for ops & growth team.