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-pentagram-gridgit 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-pentagram-grid)<a href="https://agentmods.dev/skills/nexu-io/open-design/huashu-pentagram-grid"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/huashu-pentagram-grid/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-pentagram-grid"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/huashu-pentagram-grid.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 | $0.00052 | $0.02736 |
| Opus 5 | $0.00026 | $0.01368 |
| Sonnet 5 | $0.00010 | $0.00547 |
| Haiku 4.5 | $0.00005 | $0.00274 |
Grade A, and why
huashu-pentagram-grid 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 7d 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 — 185 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Pentagram Info-Architecture · 信息建筑·红
Produce a single-file, Swiss-grid data deck. You are an information
architect working in HTML: every page is a measured grid, every number has a
coordinate, and red appears exactly where the eye must land. 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.
Adapted from the ppt-pentagram showcase of
huashu-design by 花叔
(alchaincyf), MIT licensed. The upstream file is a single data page; this
plugin extends it into a full multi-section deck while preserving its DNA.
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 |
#111111 |
dark pages + chrome bars |
--ink |
#111111 |
primary text on light |
--night-ink |
#FFFFFF |
primary text on dark |
--accent |
#E63946 |
the only red — the only accent |
--grid |
#E8E8E8 |
hairline rules / column rules |
--track |
#F5F5F5 |
bar-chart track |
--bar-base |
#E0E0E0 |
losing / baseline bar |
--muted |
#999999 |
secondary labels |
--muted-2 |
#666666 |
body copy on light |
--faint |
#BBBBBB |
tertiary captions |
--night-line |
#333333 |
hairlines on dark pages |
--night-mut |
#888888 |
secondary text on dark |
--sans |
'Helvetica Neue', 'Helvetica', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif |
the only family |
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.
- 7d ago First seen · 185 lines · 52 tokens per session scan A 7640ec08b7f2
huashu-pentagram-grid is a skill published in the GitHub repository nexu-io/open-design (95,309 stars, last pushed yesterday), licensed Apache-2.0. It adds 52 tokens to every session and 2,736 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 2026-09-03.
Other skills, from other repositories
fs-emerald-editorial
Open Design's 'design on your desk' brand-launch narrative: the market moment, the story, and the proof that converts. Built as a decision-grade marketing & GTM deck for marketing team, press.
huashu-pentagram-grid
Open Design's positioning & messaging system: the one-line promise, the pillars, and the proof — the source of truth for all copy. Built as a decision-grade marketing & GTM deck for brand & marketing team.
magazine-web-ppt
For marketing and gtm work: bind launches, campaigns, events, and brand plans to growth and pipeline outcomes. Built around the core query "annual-marketing-plan", with GTM strategy lead judgment, buyer-ready proof, and this outcome: approve launch plan, campaign budget, or GTM motion.
open-design-landing-deck
Open Design's brand-story deck for partners and press: why it exists, what it believes, and where design is going. Built as a decision-grade marketing & GTM deck for partners, press, community.
deck-guizang-editorial
Open Design's FY26 marketing plan: brand-to-pipeline — audience, offer, channel mix, and the launch calendar that ties creative to growth. Built as a decision-grade marketing & GTM deck for CMO, growth lead, founder.
html-ppt-zhangzara-broadside
Open Design's product-launch announcement and press narrative — the headline, the proof points, and the call to action. Built as a decision-grade marketing & GTM deck for press, community, prospects.