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web-design-guidelines

web-design-guidelines is a skill for Claude Code, Codex from Kevin-Liu-01/Agent-Machines. It costs 77 tokens per session (361 once invoked), scanned A, original, MIT.

A review skill that checks user-interface code against Vercel’s Web Interface Guidelines, including accessibility and design rules. It fetches the latest rules before reviewing the specified files.

In plain words
What is it for?
Use it after editing React or TypeScript components, during UI reviews, or before submitting changes that affect a web interface.
Why use it?
It provides a consistent way to spot interface and accessibility issues that can be missed during ordinary code review.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

not rated 29repo +1 15d ago A scan SkillSpector: pass 77 tokens original MIT

Good fit Use it after editing React or TypeScript components, during UI reviews, or before submitting changes that affect a web interface.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/kevin-liu-01/agent-machines/web-design-guidelines
View source ↗ Kevin-Liu-01/Agent-Machines agent-machines.dev
Install

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.

Any agent
npx skills add Kevin-Liu-01/Agent-Machines --skill web-design-guidelines
Clone the repo
git clone --depth 1 https://github.com/Kevin-Liu-01/Agent-Machines

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for web-design-guidelines

README.md
[![agentmods](https://agentmods.dev/badge/skills/kevin-liu-01/agent-machines/web-design-guidelines/github.svg)](https://agentmods.dev/skills/kevin-liu-01/agent-machines/web-design-guidelines)
Your own site
<a href="https://agentmods.dev/skills/kevin-liu-01/agent-machines/web-design-guidelines"><img src="https://agentmods.dev/badge/skills/kevin-liu-01/agent-machines/web-design-guidelines/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.

agentmods 80×15 button for web-design-guidelines

Your own site · 80×15
<a href="https://agentmods.dev/skills/kevin-liu-01/agent-machines/web-design-guidelines"><img src="https://agentmods.dev/badge/skills/kevin-liu-01/agent-machines/web-design-guidelines.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 77 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 361 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00077 $0.00361
Opus 5.5 $0.00031 $0.00144
Sonnet 5.5 $0.00015 $0.00072
Haiku 4.5 $0.00008 $0.00036

Measured 2mo ago against content hash c7335614ebff, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

web-design-guidelines 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 2mo 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.

knowledge/skills/web-design-guidelines/SKILL.md · 51 lines

What it actually says

Web Interface Guidelines

Review files for compliance with Vercel's Web Interface Guidelines.

How It Works

  1. Fetch the latest guidelines from the source URL
  2. Read the specified files (or prompt user for files/pattern)
  3. Check against all rules in the fetched guidelines
  4. Output findings in terse file:line format

Guidelines Source

Fetch fresh guidelines before each review:

https://raw.githubusercontent.com/vercel-labs/web-interface-guidelines/main/command.md

Use WebFetch to retrieve the latest rules. The fetched content contains all rules and output format instructions.

Usage

When a user provides a file or pattern argument:

  1. Fetch guidelines from the source URL above
  2. Read the specified files
  3. Apply all rules from the fetched guidelines
  4. Output findings using the format specified in the guidelines

If no files specified, ask the user which files to review.

When to Apply

  • After writing or editing React/TSX components
  • During UI code review
  • When checking accessibility compliance
  • When auditing design system implementation
  • Before submitting PRs that touch UI code
  • vercel-react-best-practices — Performance optimization rules
  • frontend-design — Distinctive frontend aesthetics
  • seo-audit — SEO compliance checking
Changes

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.

  1. 2mo ago First seen · 51 lines · 77 tokens per session scan A c7335614ebff

Subscribe to this mod's changes

web-design-guidelines is a skill published in the GitHub repository Kevin-Liu-01/Agent-Machines (29 stars, last pushed 15d ago), licensed MIT. It adds 77 tokens to every session and 361 once invoked, about $0.0003 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 2026-09-03.

CSS and stylingClaude CodeDesign and UXFrontendai-agentcronhermes-agentmcpmicrovmmodel-context-protocol
Related

web-design-guidelines compared with skills from other repositories

web-design-guidelines next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
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web-prototype-taste-brutalistnexu-io/open-designSkill106kyesterdayApache-2.0A70Claude Code, Codex
web-prototype-taste-softnexu-io/open-designSkill106kyesterdayApache-2.0A69Claude Code, Codex
mockup-device-3dnexu-io/open-designSkill106kyesterdayApache-2.0A39Claude Code, Codex
open-design-homepagenexu-io/open-designSkill106kyesterdayApache-2.0A65Claude Code, Codex