UX/UI Agent Skills is a set of instructions, design tokens, reusable components, accessibility rules, and design-system references that guide Claude in producing interface designs and code. It is intended for developers and designers who want framework-independent, token-based UI work with accessibility checks. The catalogue entries package these UX, UI, component, and validation workflows as Claude Code skills and related add-ons.
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 plugin87/ux-ui-agent-skills --skill critiquegit clone --depth 1 https://github.com/plugin87/ux-ui-agent-skillsWrote 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/plugin87/ux-ui-agent-skills/critique)<a href="https://agentmods.dev/skills/plugin87/ux-ui-agent-skills/critique"><img src="https://agentmods.dev/badge/skills/plugin87/ux-ui-agent-skills/critique/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/plugin87/ux-ui-agent-skills/critique"><img src="https://agentmods.dev/badge/skills/plugin87/ux-ui-agent-skills/critique.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00037 | $0.01281 |
| Opus 5.5 | $0.00015 | $0.00512 |
| Sonnet 5.5 | $0.00007 | $0.00256 |
| Haiku 4.5 | $0.00004 | $0.00128 |
Grade A, and why
critique 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.
What it actually says
You are now running in a forked context. You cannot see the conversation that produced this work, you cannot ask the user a question, and nothing you learned elsewhere applies. Everything you need is below or on disk.
Step 0 — is the kit here?
ls ${CLAUDE_SKILL_DIR}/../../../tokens >/dev/null 2>&1 && echo KIT_OK || echo KIT_MISSING
On KIT_MISSING only the skill folders were installed, which is what npx skills add does. Say so plainly, point at npx ux-ui-agent-skills init or the
plugin install, and stop. Do not guess the contents of a file you could not open.
Step 1 — take the critic's instructions, in full.
cat ${CLAUDE_SKILL_DIR}/../../../.claude/agents/design-critic.md
That file is your brief: the stance, the three rules you never break, and the verdict format. Read it and follow it literally. If it is missing, say so and stop rather than improvising a critique — an unbriefed critic is a second opinion, not a review.
Step 2 — resolve the target.
Target: $ARGUMENTS — a file or a directory.
You cannot ask. If $ARGUMENTS is empty or names nothing that exists, say
exactly what you were given, list what you would have accepted, and stop. A
critique of a guessed target is worse than no critique, because it reads like a
verdict on the real work.
Step 3 — refuse to critique blind.
A critique written from source alone is worthless. Render the target and look at it: screenshot every screen or harness at 1280 and 390 wide, light and dark, transitions off and the pointer parked off the UI. Then click every control and write down what actually changed. A control that changes nothing is a finding.
Step 4 — gather the numbers you will cite.
KIT=${CLAUDE_SKILL_DIR}/../../..
node $KIT/scripts/taste_audit.mjs <file> && node $KIT/scripts/taste_audit.mjs <file> --dark
node $KIT/scripts/slop_tells.mjs <file> && node $KIT/scripts/slop_tells.mjs <file> --dark
node $KIT/scripts/verify_overflow.mjs <file|dir>
node $KIT/scripts/verify_responsive.mjs <file|dir> --scale=1.25
Report what they actually printed. These are heuristics: they name what you saw, they do not decide whether it is good. A clean run is not a defence: the kit's own seeded-defect fixtures pass every one of these gates, in both themes, and every one of them is work a senior designer would send back.
Step 5 — write the verdict.
In the format design-critic.md specifies: the verdict, the three reasons a
senior designer would send this back, and the findings table with evidence per
finding. Name the file and the element. "The spacing feels off" is not a finding;
"the card's 12px internal gap is the same as the 12px gap between cards, so the
grouping reads as one block" is.
Do not soften it, and do not pad the "what is good" list to balance the tone.
Step 6 — state the scope, every time.
This is judgement, not measurement. It produces no percentage, and no percentage in this repo covers taste. Say so in the output.
After the critique comes back
For the session that invoked this skill, not for the fork:
Act on it. Fix every Critical and Major finding, re-run /gate, and run this
critique again on what changed. The loop ends when the remaining findings are
Minor or Enhancement — not when you are tired of it.
Scoring the critic itself, rather than the work, is a maintainer task and lives with the harness in the kit's repository - not here. This skill installs into your project, and nothing it tells you to do should name a file your install does not have.
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 Changed · +39 lines 22bfbbf8781a
- 9d ago First seen · 75 lines · 37 tokens per session scan A 96c7d03902d2
critique is a skill published in the GitHub repository plugin87/ux-ui-agent-skills (1,927 stars, last pushed 5d ago), licensed MIT. It adds 37 tokens to every session and 1,281 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-10-07.
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