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 discovery-question-formgit 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/discovery-question-form)<a href="https://agentmods.dev/skills/nexu-io/open-design/discovery-question-form"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/discovery-question-form/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/discovery-question-form"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/discovery-question-form.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 | $0.00013 | $0.00887 |
| Opus 5 | $0.00006 | $0.00443 |
| Sonnet 5 | $0.00003 | $0.00177 |
| Haiku 4.5 | $0.00001 | $0.00089 |
Grade A, and why
discovery-question-form 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 yesterday.
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 — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Discovery question form
This atom defines the <question-form> protocol. It does not decide whether
clarification is required. Follow the active skill and core prompt's
requirements-clarification policy. When they identify unresolved information
that would materially change the design direction, content structure, or
delivery format, surface the smallest possible set of questions that unblocks
the workflow.
The questions are rendered as a <question-form> artifact inline in the
originating assistant message. This is assistant text parsed by the host, not a
plugin GenUI surface or a native tool call. Submitted answers return as the
next user message, beginning with [form answers — <form-id>].
Activation boundary
- A first turn or new project does not by itself require a form.
- A
discoverypipeline stage only makes this protocol available; declaring or entering the stage does not trigger a form. - Missing metadata is not automatically a question. First use the request, conversation, plugin inputs, memory, active skill, and design system.
- If enough information is available to proceed safely, do not emit a form.
- If a material blocker remains, ask only for that unresolved information.
Emission shape
Emit the form as a question-form block whose body is a JSON object with a
top-level questions array. Do not emit a bare question object by itself; the
renderer only recognizes the wrapped form contract.
<question-form id="discovery" title="Quick brief — 30 seconds">
{
"description": "I'll lock these in before building. Skip what doesn't apply — I'll fill defaults.",
"questions": [
{
"id": "audience",
"label": "Who's the primary audience?",
"type": "checkbox",
"options": ["VC", "Customer", "Internal team"],
"maxSelections": 2,
"required": true
}
]
}
</question-form>
Question object shape
Each entry in the top-level questions array uses:
id: stable answer key, for exampleaudience.label: user-facing question copy.type: one ofradio,checkbox,select,text,textarea,number,range,date,time,datetime-local,color,url,email,tel,file, orswitch.options: required for choice controls; strings are allowed, or objects with localizedlabeland stablevalue.- At most 6-7 options per question; merge near-duplicates instead of listing more.
- Choose
radiovsselectby option count, not importance:radiofor a short list,selectonce it runs long (languages, timezones, voices).checkboxis always a plain list. selectoptions may carrygroup(first group expands, the rest collapse) andtrailingLabel(a short end-of-row code such asZH-CN). Both optional.- Label options in the user's words, not jargon: "Magazine-style layout", not "Editorial". Reword only
label; never change a stablevalue. - Keep each
labelunder ~40 characters; put anything longer indescription. allowCustom: leave unset or set totruefor finite-choice controls so users can type their own answer instead of accepting only generated options. SetallowCustom: falseonly when the downstream system needs an exact machine id.customLabel/customPlaceholder: optional localized copy for that custom answer input.maxSelections: include this for checkbox controls with a limited selection count.required: set totrueonly when the answer is needed before work can continue.
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.
- yesterday Changed · +5 lines bf66980e3bcd
- 6d ago First seen · 85 lines · 13 tokens per session scan A 8daefdaadfcd
discovery-question-form is a skill published in the GitHub repository nexu-io/open-design (95,021 stars, last pushed today), licensed Apache-2.0. It adds 13 tokens to every session and 887 once invoked, about $0.0001 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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