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ui-lint

ui-lint is a skill for Claude Code from skillmds/skillmd. It costs 18 tokens per session (955 once invoked), scanned A, original, MIT.

A quick scan of frontend files for common design-system violations, such as hard-coded colors and raw pixel values in Tailwind classes. It uses text searches to flag likely problems rather than applying fixes.

In plain words
What is it for?
Use it to find hard-coded visual values, outdated sizing patterns, and other listed styling issues in frontend code.
Why use it?
It catches common inconsistencies quickly after code changes. It is a check for violations, not a full review of layout, accessibility, or design quality.

Skill for Claude Code

Written for Claude Code: $ARGUMENTS substitution.

Part of the design-system-audit-and-remediation plugin — 14 skills shipped together

not rated 143repo +49 4d ago A scan 18 tokens original MIT

Good fit Use it to find hard-coded visual values, outdated sizing patterns, and other listed styling issues in frontend code.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/skillmds/skillmd/ui-lint
View source ↗ skillmds/skillmd skillmd.com
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 skillmds/skillmd --skill ui-lint
Clone the repo
git clone --depth 1 https://github.com/skillmds/skillmd

Made for: Claude Code.

Or install design-system-audit-and-remediation, the plugin that ships this one along with the rest of its 14 skills.

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 ui-lint

README.md
[![agentmods](https://agentmods.dev/badge/skills/skillmds/skillmd/ui-lint/github.svg)](https://agentmods.dev/skills/skillmds/skillmd/ui-lint)
Your own site
<a href="https://agentmods.dev/skills/skillmds/skillmd/ui-lint"><img src="https://agentmods.dev/badge/skills/skillmds/skillmd/ui-lint/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 ui-lint

Your own site · 80×15
<a href="https://agentmods.dev/skills/skillmds/skillmd/ui-lint"><img src="https://agentmods.dev/badge/skills/skillmds/skillmd/ui-lint.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 955 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.
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 $0.00018 $0.00955
Opus 5.5 $0.00007 $0.00382
Sonnet 5.5 $0.00004 $0.00191
Haiku 4.5 $0.00002 $0.00096

Measured 1mo ago against content hash b66d675de67c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ui-lint 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 1mo 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.

plugins/design-system-audit-and-remediation/skills/ui-lint/SKILL.md · 106 lines

How it starts

The opening of the file, as written. The whole thing — 106 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Design Lint (Quick Check)

When to Use

Use this skill when you need quick automated lint — detects common design system violations in seconds.

When NOT to use

  • For deeper review of design judgment (composition, hierarchy, rhythm) → use /ss-review
  • For accessibility specifically → use /ss-a11y
  • For Nielsen UX heuristics → use /ss-audit
  • For applying refactors — this only flags violations; use /ss-review to fix

Target: $ARGUMENTS

What This Does

Fast, grep-based scan for common design violations. Runs in seconds (unlike /ss-review which is a deep manual audit). Run this after every file change.

Checks

1. Hardcoded Colors

Search for hex colors in className strings that should be semantic tokens:

grep -n '#[0-9a-fA-F]\{3,8\}' [file] | grep -v 'theme.css\|tokens\|\.json'

Violation: text-[#3C3C3C], bg-[#721FE5] Fix: text-text-primary, bg-brand

2. Raw Pixel Values in Tailwind

grep -n 'p-\[.*px\]\|m-\[.*px\]\|gap-\[.*px\]' [file]

Violation: p-[24px], gap-[12px] Fix: p-6, gap-3

3. Old Width/Height Syntax

grep -n 'w-[0-9] h-[0-9]\|w-\[.*\] h-\[' [file]

Violation: w-4 h-4 Fix: size-4

4. Physical Properties (LTR-only)

grep -n ' ml-\| mr-\| pl-\| pr-' [file]

Violation: ml-2, mr-4 Fix: ms-2, me-4

5. Forbidden Colors

grep -n 'text-black\|bg-black\|#000000\|#000"' [file]

Violation: Any pure black Fix: Use skin's text-primary token

6. Missing data-slot

grep -n 'function [A-Z]' [file] # find components
grep -n 'data-slot' [file]       # check if present

Violation: Component without data-slot Fix: Add data-slot="component-name"

7. Font Size CSS Variables (CRITICAL — Tailwind v4 conflict)

grep -n 'text-\[var(--' [file]
grep -n '\-\-text-.*px\|--fs-.*px' [file]

Violation: text-[var(--text-sm)] or --text-sm: 13px in theme.css Fix: Use explicit text-[13px]. CSS variable font sizes conflict with Tailwind v4's --text-* namespace — Tailwind reads them as color, not font-size.

Read the full file on GitHub · 106 lines

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. 1mo ago First seen · 106 lines · 18 tokens per session scan A b66d675de67c

Subscribe to this mod's changes

ui-lint is a skill published in the GitHub repository skillmds/skillmd (143 stars, last pushed 4d ago), licensed MIT. It adds 18 tokens to every session and 955 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 2026-09-19.

CSS and stylingDesign and UXFrontendLintagent-skillsai-agentsclaudeclimcp
Related

ui-lint compared with skills from other repositories

ui-lint next to 6 skills from other repositories
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ui-lintskillmds/skillmdSkill1434d agoMITA18Claude Code
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interaction-skillcode-yeongyu/lazycodexSkill3.9kyesterdayMITA104Claude Code, Codex
designlang-tokensManavarya09/design-extractSkill4.8k2d agoMITA30Claude Code
omd-3d-herokwakseongjae/oh-my-designSkill573yesterdayMITA342Claude Code
accessibilityericrisco/rsc-harnessSkill5293d agoMITA86Claude Code, Codex