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-annual-lettergit 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-annual-letter)<a href="https://agentmods.dev/skills/nexu-io/open-design/huashu-annual-letter"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/huashu-annual-letter/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-annual-letter"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/huashu-annual-letter.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 | $0.00045 | $0.02536 |
| Opus 5 | $0.00023 | $0.01268 |
| Sonnet 5 | $0.00009 | $0.00507 |
| Haiku 4.5 | $0.00005 | $0.00254 |
Grade A, and why
huashu-annual-letter 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 — 177 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Annual Letter · 年度信笺
Produce a single-file, letter-grade HTML deck in the Stripe Annual Letter
genre: a published letter you read, not a template you skim. Prose flows in
serif paragraphs; numbers live in inline data cards and giant display anchors.
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, and never introduce colors or fonts outside
this spec.
Adapted from the editorial-longform style (references/design-styles.md,
安静派 · 杂志编辑长文流 / Editorial Longform) of
huashu-design by
花叔 (alchaincyf), MIT licensed. Reference lineage: Stripe Annual Letter,
Amazon six-page narrative memos, Stripe Press.
Hard spec (locked — violating any line is a regression)
Canvas & scaling
- One
<div id="stage">fixed at 1920 × 1080 px, centered withposition: fixed; top: 50%; left: 50%. - A
fit()function scales the stage to the viewport:scale = min(innerWidth / 1920, innerHeight / 1080), applied astranslate(-50%, -50%) scale(s), re-run onresize. Letterboxed, never cropped. - All layout inside the stage uses px (never
vw/vh/%for type) — the scaler owns responsiveness.
Slides & navigation runtime (do not rewrite the script)
- Each page is one
<section class="slide">directly inside#stage, with adata-screen-label="01 刊头"-style label (1-indexed). - Exactly one slide carries
.active. No.darkpages in this theme — every page sits on cream paper; rhythm comes from density, not theme flips. - Keyboard:
←/↑/PageUpprevious ·→/↓/Space/PageDownnext ·Home/Endfirst/last. Hash routing#/N(1-indexed) read on load andhashchange, written viahistory.replaceState. Click: left third back, rest forward. Fixed counter pill bottom-right, key-hint bottom-left. - Zero external JS, zero build step; the file must open via
file://inside a sandboxed iframe.
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.
- 9d ago First seen · 177 lines · 45 tokens per session scan A b452eb312cbb
huashu-annual-letter is a skill published in the GitHub repository nexu-io/open-design (95,624 stars, last pushed yesterday), licensed Apache-2.0. It adds 45 tokens to every session and 2,536 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-annual-letter
Open Design's annual letter to its community: the year's story, what it learned, and where it's going next. Built as a decision-grade corporate strategy deck for community, contributors, investors.
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Open Design's FY26 board pre-read: the open-core bet, growth vs burn, and the one decision the board must approve. Built as a decision-grade corporate strategy deck for board, CEO, CFO.
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Open Design's all-hands: the year in review, the three priorities, and what every team owns next quarter. Built as a decision-grade corporate strategy deck for whole company.
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Open Design's operating review: growth, burn, and the concrete path to sustainability without losing the open ethos. Built as a decision-grade corporate strategy deck for leadership team.
html-ppt-zhangzara-blue-professional
Open Design's QBR for the executive committee: what moved, what stalled, and the resource reallocation ask. Built as a decision-grade corporate strategy deck for executive committee.
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Open Design's strategy memo: should it monetize the plugin registry now or hold — options, risks, and the recommendation. Built as a decision-grade corporate strategy deck for CEO, strategy team.