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.
git 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/plugins/nexu-io/open-design/marketplace)<a href="https://agentmods.dev/plugins/nexu-io/open-design/marketplace"><img src="https://agentmods.dev/badge/plugins/nexu-io/open-design/marketplace/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/plugins/nexu-io/open-design/marketplace"><img src="https://agentmods.dev/badge/plugins/nexu-io/open-design/marketplace.svg" alt="Reviewed on agentmods" width="80" height="20"></a>Grade A, and why
open-design marketplace 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 1mo 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.
What it actually says
{
"$schema": "https://raw.githubusercontent.com/anthropics/claude-code/main/schemas/marketplace.json",
"name": "open-design",
"owner": {
"name": "nexu-io",
"url": "https://github.com/nexu-io/open-design"
},
"description": "OpenDesign — local-first design app exposed to coding agents over MCP. Install once with your agent's plugin command and projects/files/skills are reachable through stdio.",
"plugins": [
{
"name": "open-design",
"source": "./plugins/open-design",
"description": "OpenDesign MCP server (stdio). 139 skills + projects/files/preview tools, served by your local `od` daemon. Requires `od` on PATH (brew / npm / DMG)."
}
]
}
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.
- 1mo ago First seen · 17 lines scan A 8c02ce756c5c
open-design marketplace is a plugin published in the GitHub repository nexu-io/open-design (101,352 stars, last pushed today), licensed Apache-2.0. Its token cost is not measured: this kind of file is read by the harness, not the model. 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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Rewrite AI-sounding text so it reads like the writer without changing what it says.
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Official Next.js skills: adopt and optimize Cache Components, adopt Partial Prefetching, and verify runtime behavior against a running dev server.