Skill/Static safety grade

skills/web-design-guidelines

github/vercel-labs/agent-skills#skills/web-design-guidelines

litmus-skill-v3 · 2026-07-05

graded at commit ba46938 · 2026-01-16

The skills/web-design-guidelines skill is graded A by polygraph under litmus-skill-v3, as of 2026-07-05, anchored to its content hash.

Graded under litmus-skill-v3; the current skill methodology is litmus-skill-v2. A re-run may change the grade.

Self-reported “Review UI code for Web Interface Guidelines compliance. Use when asked to "review my UI", "check accessibility", "audit design", "review UX", or "check my site against best practices".” — the skill’s own SKILL.md description at the graded commit, not part of the grade.

A static safety grade — a deterministic scan of the skill’s SKILL.md and bundled files. An A means static-clean, not behavioral proof: a skill’s instructions are interpreted by an agent at runtime.

Share on X

S-01 Prompt-injection / context-poisoningpass

S-03 Data-exfiltration instructionspass

S-04 Dangerous bundled commandspass

no dangerous commands in the body; no bundled scripts

content hash · 0xdec5ce50b1…b2e9

Source · github.com/vercel-labs/agent-skills/tree/main/skills/web-design-guidelines

Watch for changes

This grade is a snapshot of the skill’s files at one commit. Get an email when a new commit changes skills/web-design-guidelines and polygraph re-runs the litmus — one message per change, one-click unsubscribe.

Monitor this skill

Reproduce this grade

The skill litmus is open and deterministic. Point it at the skill directory and compare the grade and content hash — a false grade is falsifiable, not merely disputable.

npx -p @polygraphso/litmus polygraphso-litmus-skill <skill-dir>

Embed this badge

Drop it in the skill’s README, docs, or listing. It always shows the current grade and links back here.

Markdown — badge

[![polygraph](https://www.polygraph.so/api/badge/skill?skill=github/vercel-labs/agent-skills/skills/web-design-guidelines)](https://www.polygraph.so/skill/github/vercel-labs/agent-skills/skills/web-design-guidelines)

HTML — badge

<a href="https://www.polygraph.so/skill/github/vercel-labs/agent-skills/skills/web-design-guidelines"><img src="https://www.polygraph.so/api/badge/skill?skill=github/vercel-labs/agent-skills/skills/web-design-guidelines" alt="polygraph grade"></a>

Markdown — card

[![polygraph](https://www.polygraph.so/api/badge/skill/card?skill=github/vercel-labs/agent-skills/skills/web-design-guidelines)](https://www.polygraph.so/skill/github/vercel-labs/agent-skills/skills/web-design-guidelines)

Questions

What does the A skill grade mean for skills/web-design-guidelines?: It’s a static safety grade(A/B/D/F) from a deterministic scan of the skill’s SKILL.md and bundled files. An A means static-clean — not behavioral proof, since a skill’s instructions are interpreted by an agent at runtime.
What did polygraph check?: Three static checks: S-01 prompt-injection and context-poisoning, S-03 data-exfiltration instructions, and S-04 dangerous bundled commands. The full battery is in the methodology.
How do I reproduce this grade?: Run npx -p @polygraphso/litmus polygraphso-litmus-skill <skill-dir>. The scan is open and deterministic, anchored to the skill’s content hash, so the same directory yields the same grade.