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Use this skill when the design's perceived quality affects whether users will tolerate friction, give the product a chance, or judge it as well-made — which is most consumer-facing surfaces, marketing, onboarding, first-run, and any moment where an unfamiliar user is forming a quick judgment. Trigger when designing landing pages, sign-up flows, first-time UX, app store screenshots, demo videos, sales decks, or any surface where the user's first impression matters and friction is unavoidable. Also trigger when defending why "polish" matters on a working product, or when the user asks "should we ship the spartan version or invest in design?"
Claude Skills are markdown + scripts loaded into Claude Code; scanned with the same pipeline.
We found this by crawling public sources and nobody has attested to it. That is how most of the registry gets here, and it is not a mark against the artifact — it only means no authenticated act of publication is on record. An artifact can be the vendor's own and still appear here.
Claude Skills install to a single target, no runtime picker.
nerlo install -- 'hdeibler/universal-design-principles (aesthetic-usability-effect)'
Manual alternative: copy the skill folder into ~/.claude/skills/ so Claude Code loads it on next launch.
cp -r -- 'hdeibler/universal-design-principles (aesthetic-usability-effect)' ~/.claude/skills/
Install respects the composite badge: Clean proceeds, Caution prompts for confirmation, and Flagged is refused. Write operations require an API token.
3 of 11 scanners examined this package. The rest do not apply to it — language, ecosystem and packaging decide which analyzers can say anything, and a scanner that cannot examine an artifact reports nothing rather than passing it.
v2.0.11
460 findings · 22.9s
v0.3.74
16 findings · 5.5s
v0.1.0
0 findings · 5.3s
v1.4.0
None of the entry points this scanner reads were found in this artifact. What each scanner covers
0 findings · 0.3s
v0.1.0
No source files this scanner can analyze were found in this artifact. What each scanner covers
0 findings · 5.3s
vv0.3.2
No Go packages were found in this artifact. What each scanner covers
0 findings · 0.2s
v0.1.0
This scanner found nothing in this artifact that it assesses. What each scanner covers
0 findings · 1.3s
v0.71.0
No dependency manifest or lockfile was found in this artifact. What each scanner covers
0 findings · 0.4s
v2.3.8
No dependency manifest or lockfile was found in this artifact. What each scanner covers
0 findings · 0.3s
v0.71.0
No container image was published for this artifact. What each scanner covers
0 findings · 0.0s
vv1.6.0
No Go modules were found in this artifact. What each scanner covers
0 findings · 0.1s
1 scan on record. Every scan's full results are retained immutably for 24 months.
| Completed | Composite | Change | Scanners | Status |
|---|---|---|---|---|
| Aug 20, 2026 | Flagged33 | — | agentshield ·n/a: not applicablecisco-skill-scanner: completeagent-audit-kit: completenerlo-behavioral ·n/a: not applicablenerlo-install-instruction: completecapslock ·n/a: not applicablenerlo-multi-source ·n/a: not applicabletrivy ·n/a: not applicableosv-scanner ·n/a: not applicabletrivy_image ·n/a: not applicablegovulncheck ·n/a: not applicable | completed |
Findings in files this artifact installs stand as reported; a model re-read the rest and said which ones it believes are false positives. This is a second opinion published beside the evidence, not a correction to it: the per-scanner reports above are unchanged, every dismissed finding is still listed there at its original severity, and the score and the Flagged badge are computed from those raw severities alone. Nothing below moved them.
Out of 476 findings across every scanner that examined this package.
Not reviewed is not the same as clean. Those 475 findings stand exactly as their scanners reported them, at full severity, as they would have without this review.
Two keys had to turn. The model had to name a reason from a fixed list of six, and a deterministic check of ours — over which files this artifact actually installs — had to independently agree. Anything it could not corroborate is in “not reviewed” above, at full severity.
1 Documentation or example — The match is in documentation or sample code, confirmed by our own check to be outside the installed artifact.
Rules: MANIFEST_MISSING_LICENSE · Files: /repo/docs/SKILL.md · reported by cisco-skill-scanner
280 The model called these false positives and our own check did not agree, so the dismissal was refused.
Rules: MANIFEST_MISSING_LICENSE · Files: /repo/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary/SKILL.md, /repo/plugins/process-and-robustness-principles/skills/scaling-load-assumptions/SKILL.md, /repo/plugins/process-and-robustness-principles/skills/iteration-design-vs-development/SKILL.md and 277 more · reported by cisco-skill-scanner
195 The model's answer could not be read.
Rules: AAK-MARKETPLACE-001, AAK-HEALTHCARE-AI-004, SOCIAL_ENG_VAGUE_DESCRIPTION and 2 more · Files: .cursor-plugin/marketplace.json, .claude-plugin/marketplace.json, .agents/plugins/marketplace.json and 165 more · reported by agent-audit-kit, cisco-skill-scanner
Artifact contains high-severity marketplace configuration issues
The artifact includes configuration files for marketplace plugins that exhibit high-severity issues. Specifically, the `AAK-MARKETPLACE-001` rule is triggered multiple times in `.agents/plugins/marketplace.json`, `.claude-plugin/marketplace.json`, and `.cursor-plugin/marketplace.json`. These findings indicate potential risks related to how the artifact interacts with or configures external marketplaces. Further investigation into these configuration files is warranted.
Concern level assessed by the review: High. This is the review's scale, not the registry badge.
Reviewed by gemini-2.5-flash. The model sees the findings, not your code, and cannot change a score.