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 agentmods add skills/etr/groundwork/ux-designnpx skills add etr/groundwork --skill ux-designgit clone --depth 1 https://github.com/etr/groundworkWhat 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 | $0.00023 | $0.09306 |
| Opus 5 | $0.00012 | $0.04653 |
| Sonnet 5 | $0.00005 | $0.01861 |
| Haiku 4.5 | $0.00002 | $0.00931 |
Grade A, and why
ux-design 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 2d 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 — 714 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Design System Skill
Establishes a complete design system through guided collaboration: foundations, brand identity, and UX patterns.
Accessibility standard: Design to the bar your patterns will be reviewed against. Treat ${CLAUDE_PLUGIN_ROOT}/references/checklists/accessibility.md as the WCAG 2.1 AA standard your color choices, components, focus behavior, and patterns must meet — the same checklist design-consistency-checker enforces.
Pre-flight: Model Recommendation
Your current effort level is {{effort_level}}.
Skip this step silently if effort is high, xhigh, or max (the scale is low < medium < high < xhigh < max, so xhigh and max are already above high) AND you are Opus (1M context).
If effort is low or medium (i.e. below high), you MUST show the recommendation prompt — regardless of model.
If you are not Opus (1M context), you MUST show the recommendation prompt - regardless of effort level.
Otherwise → use AskUserQuestion:
{
"questions": [{
"question": "Do you want to switch? Creative and analytical synthesis — resisting generic defaults requires active judgment.\n\nTo switch: cancel, run `/model opus[1m]` and `/effort high`, then re-invoke this skill.",
"header": "Recommended: Opus (1M context) at high effort",
"options": [
{ "label": "Continue" },
{ "label": "Cancel — I'll switch first" }
],
"multiSelect": false
}]
}
If the user selects "Cancel — I'll switch first": output the switching commands above and stop. Do not proceed with the skill.
Collaboration Approach
- Lead with recommendations - "I recommend X because [your context]"
- Minimize questions - Most context is in PRD/architecture
- Iterate on feedback - Adjust specific elements, don't restart
- Accept user direction - If user has specific preferences, incorporate them
- Use AskUserQuestion tool - When asking the user questions, always use the AskUserQuestion tool with appropriate options
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.
- 2d ago First seen · 714 lines · 23 tokens per session scan A 1f36c6cb4ee0
ux-design is a skill published in the GitHub repository etr/groundwork (42 stars, last pushed 21d ago), licensed MIT. It adds 23 tokens to every session and 9,306 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 2026-08-30.
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