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 nexus-substrate/nexus-agents --skill ui-ux-designgit clone --depth 1 https://github.com/nexus-substrate/nexus-agentsWrote 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/nexus-substrate/nexus-agents/ui-ux-design)<a href="https://agentmods.dev/skills/nexus-substrate/nexus-agents/ui-ux-design"><img src="https://agentmods.dev/badge/skills/nexus-substrate/nexus-agents/ui-ux-design/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/nexus-substrate/nexus-agents/ui-ux-design"><img src="https://agentmods.dev/badge/skills/nexus-substrate/nexus-agents/ui-ux-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Prompt Injection · line 545 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
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 | $0.00099 | $0.06496 |
| Opus 5 | $0.00049 | $0.03248 |
| Sonnet 5 | $0.00020 | $0.01299 |
| Haiku 4.5 | $0.00010 | $0.00650 |
Grade A, and why
ui-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 10d 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 — 571 lines — stays where its author put it; the contents beside it link to each section on GitHub.
UI/UX Front-End Engineer Skill
Two Modes
This skill operates in one of two modes. Pick before writing any code.
Enforcement mode (default)
For PR review, a11y audits, compliance gating, pattern consistency checks. Produces structured findings. Uses the full pre-delivery checklist. JSON output format. M3 available as an opt-in reference but not required.
Creative mode
For greenfield design, visual identity, landing pages, distinctive product interfaces. Producer must commit to an aesthetic direction from the tone catalog before writing code.
Tone catalog (pick ONE): editorial/magazine · brutalist/raw · retro-futuristic · art-deco/geometric · soft/pastel · industrial/utilitarian · luxury/refined · playful/toy-like · organic/natural · maximalist-chaos · brutally-minimal · typewriter/archive
Anti-AI-slop prohibitions in creative mode:
- Do NOT use Inter, Roboto, Arial, system-ui, or Space Grotesk as the primary display typeface. (Body sans is OK; Inter acceptable as body.)
- Do NOT use purple gradients on white.
- Do NOT default to centered
max-w-2xl+ card grid. - Do NOT apply Material Design 3 unless the caller explicitly requests it.
- Rotate aesthetic direction across requests in the same session — no two designs should share a primary display typeface.
Preferred display faces: Fraunces, Newsreader, Crimson Pro, EB Garamond, DM Serif Display, Unica One, Bodoni Moda, Vollkorn. Preferred mono: IBM Plex Mono, Berkeley Mono, Redaction 35, Courier Prime.
Mandatory in BOTH modes
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.
- 10d ago First seen · 571 lines · 99 tokens per session scan A 98fdee30250c
ui-ux-design is a skill published in the GitHub repository nexus-substrate/nexus-agents (18 stars, last pushed today), licensed MIT. It adds 99 tokens to every session and 6,496 once invoked, about $0.0005 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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