前端设计操作浏览器github未标认证来源可访问许可证需确认审计提醒

css-first（CSS first 浏览器）

Agent Skill

css-first 用于处理 GitHub 仓库、Issue、Pull Request 和代码协作信息，适合在 Codex、Claude、Cursor、Gemini CLI 中需要围绕仓库状态、代码变更或协作事项进行整理时使用。可结合来源仓库、安装命令和原始 README 继续核验具体用法。安装前建议确认权限范围、维护状态，以及是否会触发联网、命令执行或文件读写。

总安装

832

周安装

GitHub Stars

下载量

267

CodexClaudeCursorGemini CLI

安装说明

本站只整理中文说明和来源信息，不托管安装包，也不代用户安装。

GitHub

来源数

许可证

unknown

最后核验

2026-05-01

来源状态

来源可访问

安装方式

通过对话安装

复制提示词发给支持本地命令或 Skills 的 AI 助手，先确认命令和权限，再让它执行。

请帮我安装这个 Agent Skill：css-first（CSS first 浏览器）
来源仓库：https://github.com/luko248/css-first-skill
仓库路径：skills/css-first
安装命令：
npx skills add https://github.com/luko248/css-first-skill --skill css-first
安装前请先检查当前环境是否支持对应 CLI，并向我确认将要执行的命令、安装目录、联网范围和文件读写权限；确认后再执行。

命令行安装

复制命令到本机终端执行。该命令会通过 npx skills 从第三方来源获取 Skill；本站只展示命令，不托管安装包，也不自动执行。

skills.shnpx skills

npx skills add https://github.com/luko248/css-first-skill --skill css-first

简介

强制优先使用纯 CSS 而非 JavaScript 实现布局。

推荐逻辑属性与现代 CSS 特性组合方案。
通过 GitHub 安装，适用宿主包括 Codex、Claude、Cursor、Gemini CLI，接入前应确认版本、权限和运行环境要求。
建议提供基线状态指示器保障兼容性。
css-first 属于前端设计类 Skill，可作为该场景下的辅助能力补充。

SKILL.md

CSS First Agent Skill

An intelligent AI agent skill for providing context-aware, modern CSS-first solutions with semantic analysis and framework detection.

Description

This skill transforms any AI agent into a CSS-first expert that enforces zero-JavaScript solutions using cutting-edge CSS features (2021-2026). The agent analyzes user intent, detects project context, and provides intelligently ranked CSS suggestions with implementation guidance.

Core Capabilities:

Semantic Intent Recognition: Understands layout, animation, spacing, responsive, visual, interaction, stacking, and typography intents
Framework Detection: Automatically detects React, Vue, Angular, Svelte, Tailwind, Bootstrap, etc.
Logical-First Approach: Prioritizes writing-mode aware properties for internationalization
MDN Integration: Pulls live browser support data and baseline status
Intelligent Ranking: Scores suggestions by intent match, browser support, and framework compatibility

When to Use This Skill

Use this skill when:

User asks for UI implementation solutions
User needs to center elements, create layouts, add animations
User wants responsive design patterns
User asks about CSS properties or browser support
User needs modern CSS alternatives to JavaScript solutions

Live MDN Fetch Workflow

Use the live fetch workflow defined in references/live-mdn-fetch.md whenever Baseline status, newly available features, or current MDN content is requested.

Rules & Guidelines

All behavior rules are documented in references/rules/:

Rule	File	Summary
CSS-Only Enforcement	`references/rules/css-only-enforcement.md`	Always prioritize CSS over JavaScript
Logical Properties First	`references/rules/logical-properties-first.md`	Use `inline-size` over `width`, etc.
Modern CSS Features	`references/rules/modern-css-features.md`	Prioritize 2021-2025 features with baseline
Semantic Intent Analysis	`references/rules/semantic-intent-analysis.md`	Detect user intent before suggesting solutions
Framework Awareness	`references/rules/framework-awareness.md`	Auto-detect and adapt to project frameworks
Browser Support	`references/rules/browser-support-consideration.md`	Always provide baseline status indicators
Progressive Enhancement	`references/rules/progressive-enhancement.md`	Core functionality first, enhancements on top
Browser Verification	`references/rules/browser-verification.md`	Use MCP servers / browser hooks to verify CSS

CSS Demos

Production-ready CSS examples organized by category. See css-demos/INDEX.md for the full catalog with MDN links, baseline status, and browser support percentages.

Browser Support Levels

🟢 Widely Available (95%+): Safe for production use
🔵 Newly Available (85-94%): Recently stable, verify target browsers
🟡 Limited Availability (70-84%): Use with progressive enhancement
🟣 Experimental (<70%): Cutting-edge features, use cautiously

Quick Reference

User Intent	CSS Solution	Demo File
Center element	Flexbox / Grid	`css-demos/layout/centering-logical.css`
Spacing	Logical Properties	`css-demos/layout/logical-spacing.css`
Aligned nested grids	Subgrid	`css-demos/layout/subgrid.css`
Parent selection	`:has()`	`css-demos/layout/has-selector.css`
Component styles	CSS Nesting	`css-demos/layout/css-nesting.css`
Masonry layout	Grid Lanes	`css-demos/layout/grid-lanes-masonry.css`
z-index issues	`isolation: isolate`	`css-demos/layout/isolation-stacking.css`
Fill width with margins	`stretch`	`css-demos/layout/stretch-keyword.css`
Column wrapping	`column-wrap` + `column-height`	`css-demos/layout/column-wrap.css`
Responsive layout	Media queries (range syntax)	`css-demos/responsive/media-queries.css`
Feature detection	`@supports`	`css-demos/responsive/supports-rule.css`
Full-height sections	Dynamic viewport units	`css-demos/responsive/viewport-units.css`
Container responsive	Container size queries	`css-demos/container/size-queries.css`
Component theming	Container style queries	`css-demos/container/style-queries.css`
Sticky detection	Scroll state queries	`css-demos/container/scroll-state-queries.css`
Tooltip arrow flip	Anchored container queries	`css-demos/container/anchored-queries.css`
Page transitions	View Transitions (+ element-scoped)	`css-demos/animation/view-transitions.css`
Scroll effects	Scroll-driven animations	`css-demos/animation/scroll-driven.css`
Scroll reveals	Scroll-triggered animations	`css-demos/animation/scroll-triggered.css`
Entry/exit animation	`@starting-style`	`css-demos/animation/starting-style.css`
Dark mode	`light-dark()`	`css-demos/theming/light-dark-function.css`
Tooltips	Anchor Positioning	`css-demos/positioning/anchor-positioning.css`
Carousel / Slider	CSS Carousel	`css-demos/interaction/css-carousel.css`
Tabs / Scroll spy	CSS Carousel	`css-demos/interaction/css-carousel.css`
Flip card / 3D tile	`backface-visibility`	`css-demos/interaction/flip-card.css`
3D scenes / Cubes	`perspective` + `preserve-3d`	`css-demos/interaction/perspective-3d.css`
Popovers / Dropdowns	Popover API	`css-demos/interaction/popover.css`
Hover tooltips (no JS)	Interest Invokers	`css-demos/interaction/interest-invokers.css`
Touch vs pointer	Hover media queries	`css-demos/interaction/hover-media-queries.css`
Scroll chaining	`overscroll-behavior`	`css-demos/interaction/overscroll-behavior.css`
Fixed nav anchor offset	`scroll-margin` / `scroll-padding`	`css-demos/interaction/scroll-margin-padding.css`
Highlight anchor target	`:target` / `:focus-within`	`css-demos/interaction/target-focus-within.css`
Form validation	`:user-valid`/`:user-invalid`	`css-demos/visual/form-validation.css`
Color variations	`color-mix()`	`css-demos/visual/color-mix.css`
Color conversion	Relative color syntax	`css-demos/visual/relative-colors.css`
Glassmorphism	`backdrop-filter`	`css-demos/visual/backdrop-filter.css`
Adaptive text on bg	`mix-blend-mode`	`css-demos/visual/mix-blend-mode.css`
Modern shapes	`corner-shape`	`css-demos/visual/corner-shape.css`
Responsive clipping	`clip-path: shape()`	`css-demos/visual/clip-path-shape.css`
Gap separators	`column-rule` / `row-rule`	`css-demos/visual/gap-decorations.css`
Optical text centering	`text-box-trim`	`css-demos/visual/text-box-trim.css`
Text justification	`text-justify`	`css-demos/visual/text-justify.css`
Focus outlines clipped	`overflow: clip` + clip-margin	`css-demos/visual/overflow-clip-margin.css`
Conditional values	`if()`	`css-demos/functions/css-if-function.css`
Reusable CSS logic	`@function`	`css-demos/functions/custom-functions.css`
Data-driven styles	Advanced `attr()`	`css-demos/functions/advanced-attr.css`
Auto contrast text	`contrast-color()`	`css-demos/functions/contrast-color.css`
Circular layout	`sin()` / `cos()`	`css-demos/functions/trigonometric-functions.css`
Staggered animations	`sibling-index()` / `sibling-count()`	`css-demos/functions/sibling-functions.css`
Cascade control	`@layer`	`css-demos/specificity/cascade-layers.css`
Scoped styles	`@scope`	`css-demos/specificity/scope-rule.css`
Custom select styling	`appearance: base-select`	`css-demos/native-customization/customizable-select.css`
Reduced motion	`prefers-reduced-motion`	`css-demos/accessibility/prefers-reduced-motion.css`
High contrast	`prefers-contrast`	`css-demos/accessibility/prefers-reduced-motion.css`
Forced colors (Win HC)	`forced-colors`	`css-demos/accessibility/prefers-reduced-motion.css`

适合场景

用户想查找某类 Agent Skill 时

需要根据任务场景推荐可安装能力包时

需要对比不同来源的安装命令和来源信息时

能力概览

能力 1

按任务关键词查找相关 Skills

能力 2

展示可复制的安装命令

能力 3

保留来源站点、仓库和原始说明，方便继续核验

能力 4

展示第三方安全扫描或审计结果

安装后应在对应宿主中按原始 README 的触发条件使用；具体调用方式请以来源页面和 README 为准。

平台分布

Codex

32.52%

按下载量换算87

Claude

30.11%

按下载量换算80

Cursor

18.46%

按下载量换算49

Gemini CLI

9.45%

按下载量换算25

安全审计

Gen Agent Trust Hub

通过

Socket

通过

Snyk

可疑

权限和风险

操作浏览器

该 Skill 可能涉及浏览器控制能力，使用时可能读取或操作网页内容，需要在受控环境中确认权限边界。

安装前确认

本站仅展示第三方公开信息，不托管安装包，不提供自动安装或运行环境。安装前应自行审查源码、依赖和命令行为。来源安全扫描存在 warning/failed 结果，不能写成本站确认安全。当前只有一个来源，正式发布前建议补源仓库或其他目录站核验。

来源信息

GitHub 仓库

github.com

/luko248/css-first-skill

SKILL.md 来源

github.com

/luko248/css-first-skill/tree/main/skills/css-first

skills-sh

skills.sh

/luko248/css-first-skill/css-first

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