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 html-ppt-course-modulegit 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/html-ppt-course-module)<a href="https://agentmods.dev/skills/nexu-io/open-design/html-ppt-course-module"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/html-ppt-course-module.svg" alt="Measured on agentmods" 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 | $0.00047 | $0.01369 |
| Opus 5 | $0.00023 | $0.00685 |
| Sonnet 5 | $0.00009 | $0.00274 |
| Haiku 4.5 | $0.00005 | $0.00137 |
Grade A, and why
html-ppt-course-module 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.
Copies of this mod
2 near-identical copies found in the catalogue:
- html-ppt-pitch-deck — 88% identical, 58 lines differ
- html-ppt-graphify-dark-graph — 80% identical, 57 lines differ
How it starts
The opening of the file, as written. The whole thing — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.
HTML PPT · Course Module
A focused entry point into the html-ppt master skill that lands the user directly on the course-module full-deck template.
When this card is picked
The Examples gallery wires "Use this prompt" to the example_prompt above. When you accept that prompt, this card is the right pick if the user wants exactly the visual identity of course-module (see the upstream full-decks catalog for screenshots and rationale).
How to author the deck
- Read the master skill first. All authoring rules live in
design-templates/html-ppt/SKILL.md— content/audience checklist, token rules, layout reuse, presenter mode, the keyboard runtime, and the "never put presenter-only text on the slide" rule. - Start from the matching template folder:
design-templates/html-ppt/templates/full-decks/course-module/— copyindex.htmlandstyle.cssinto the project, keep the.tpl-course-modulebody class. - Bring the shared runtime with the template. The upstream
index.htmllinks the shared CSS/JS via../../../assets/...because it sits three folders deep insidedesign-templates/html-ppt/templates/full-decks/. Once you copyindex.htmlinto the project, those parent-relative URLs no longer resolve andbase.css,animations.css, andruntime.jswill 404 — meaning the deck never activates and slide navigation is dead. Pick one of these two recipes per project:- Recipe A — copy + rewrite (preferred): copy
design-templates/html-ppt/assets/fonts.css,design-templates/html-ppt/assets/base.css,design-templates/html-ppt/assets/animations/animations.css, anddesign-templates/html-ppt/assets/runtime.jsinto a project-localassets/(withassets/animations/animations.css), then rewrite the four<link>/<script>tags inindex.htmlfrom../../../assets/...to the matching project-local paths (assets/fonts.css,assets/base.css,assets/animations/animations.css,assets/runtime.js). - Recipe B — inline: read the same four files and replace each
<link rel="stylesheet" href="../../../assets/...">with a<style>...</style>containing the file's contents, and the<script src="../../../assets/runtime.js">with a<script>...</script>containingruntime.js. Yields a single self-containedindex.html. Either way, do not ship the upstream../../../assets/...URLs verbatim into a project artifact — they only work in-tree.
- Recipe A — copy + rewrite (preferred): copy
- Pick a theme. Default tokens look fine; if the user wants a different
feel, swap in any of the 36 themes from
design-templates/html-ppt/assets/themes/*.cssvia<link id="theme-link">and letTcycle. - Replace demo content, not classes. The
.tpl-course-modulescoped CSS only recognises the structural classes shipped in the template — keep them. - Speaker notes go inside
<aside class="notes">or<div class="notes">— never as visible text on the slide.
What ships with it
1 file 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 · 99 lines · 47 tokens per session scan A ee4d35bef08f
html-ppt-course-module is a skill published in the GitHub repository nexu-io/open-design (94,527 stars, last pushed today), licensed Apache-2.0. It adds 47 tokens to every session and 1,369 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 2026-08-30.
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deck-course-module
A course or workshop slide template with persistent learning goals, teaching pages, multiple-choice self-tests, and a wrap-up.