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 fs-emerald-editorialgit 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/fs-emerald-editorial)<a href="https://agentmods.dev/skills/nexu-io/open-design/fs-emerald-editorial"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/fs-emerald-editorial/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/fs-emerald-editorial"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/fs-emerald-editorial.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 | $0.03007 |
| Opus 5 | $0.00024 | $0.01503 |
| Sonnet 5 | $0.00010 | $0.00601 |
| Haiku 4.5 | $0.00005 | $0.00301 |
Grade A, and why
fs-emerald-editorial 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 6d 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 — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Emerald Editorial（祖母绿封面故事）
A magazine-cover business deck system rooted in fashion-magazine mastheads and 19th-century theatrical playbills: a saturated emerald field, deep navy ink, warm paper tiles, bilateral double-rule ornaments, and Bodoni Moda at weight 900. Curated from the MIT-licensed zarazhangrui/beautiful-html-templates emerald-editorial template.
Start from example.html in this plugin folder. It is the locked seed: keep its :root tokens, all eight slide-master CSS blocks, the <deck-stage> element, and the entire inlined deck-stage runtime script verbatim. Replace only the text content, numbers, and labels. Do not rewrite the design, and do not introduce any color or font outside this spec.
Design tokens (locked — list verbatim in :root)
| Token | Value | Role |
|---|---|---|
--bg |
#3CD896 |
Emerald — the dominant slide canvas |
--bg-2 |
#2DC684 |
Darker emerald, reserved tonal variant (rarely used) |
--bg-3 |
#25B377 |
Darkest emerald, reserved |
--ink |
#0F1A5C |
Navy — text, rules, borders, inverse-panel fill |
--ink-2 |
#1B2774 |
Lighter navy, reserved |
--ink-3 |
#3A4593 |
Lightest navy, reserved |
--paper |
#F1E9D6 |
Oat paper — alternate tile fill, alt chart series |
--rule |
rgba(15, 26, 92, 0.22) |
Chart grid lines only (2px, on navy ground use rgba(60,216,150,0.22)) |
--rule-strong |
rgba(15, 26, 92, 0.85) |
Near-solid rule alternative |
--display-font |
'Bodoni Moda', serif |
The single display face |
Page background outside the stage is #0a0a0a (the runtime letterbox). The emerald / navy / paper triad is the entire palette — never introduce a fourth color family. Color pairings are fixed: ink-on-emerald, emerald-on-navy (the only display color flip), ink-on-paper. Delta/tag pills invert: emerald pill on a navy tile, navy pill on a paper tile.
Typography (locked — exactly two faces)
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.
- 6d ago First seen · 117 lines · 49 tokens per session scan A 660623466f97
fs-emerald-editorial is a skill published in the GitHub repository nexu-io/open-design (95,309 stars, last pushed today), licensed Apache-2.0. It adds 49 tokens to every session and 3,007 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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