UI Styling
Ohh-889/skyroc
Create beautiful, accessible user interfaces with shadcn/ui components (built on Radix UI + Tailwind), Tailwind CSS utility-first styling, and canvas-based visual designs.
A skill your agent uses when reviewing stylesheets, component styles, and responsive behavior related to Load CSS without blocking render.
Install CSS Non Blocking
$ npx skills add thedaviddias/Front-End-Checklist --skill css-non-blocking -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install thedaviddias/Front-End-Checklist css-non-blocking --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/css-non-blocking .claude/skills/css-non-blocking && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "css-non-blocking" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/css-non-blocking into .claude/skills/css-non-blocking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "css-non-blocking", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/css-non-blockingType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add thedaviddias/Front-End-Checklist --skill css-non-blocking -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install thedaviddias/Front-End-Checklist css-non-blocking --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/css-non-blocking .agents/skills/css-non-blocking && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "css-non-blocking" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/css-non-blocking into .agents/skills/css-non-blocking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "css-non-blocking", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add thedaviddias/Front-End-Checklist --skill css-non-blocking -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install thedaviddias/Front-End-Checklist css-non-blocking --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/css-non-blocking .cursor/skills/css-non-blocking && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "css-non-blocking" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/css-non-blocking into .cursor/skills/css-non-blocking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "css-non-blocking", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/thedaviddias/Front-End-Checklist.git --path skills/css-non-blocking--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add thedaviddias/Front-End-Checklist --skill css-non-blocking -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install thedaviddias/Front-End-Checklist css-non-blocking --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/css-non-blocking .gemini/skills/css-non-blocking && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "css-non-blocking" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/css-non-blocking into .gemini/skills/css-non-blocking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "css-non-blocking", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install thedaviddias/Front-End-Checklist css-non-blockingInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add thedaviddias/Front-End-Checklist --skill css-non-blocking -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/css-non-blocking .github/skills/css-non-blocking && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "css-non-blocking" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/css-non-blocking into .github/skills/css-non-blocking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "css-non-blocking", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add thedaviddias/Front-End-Checklist --skill css-non-blocking -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install thedaviddias/Front-End-Checklist css-non-blocking --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/css-non-blocking .opencode/skills/css-non-blocking && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "css-non-blocking" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/css-non-blocking into .opencode/skills/css-non-blocking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "css-non-blocking", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
css-non-blocking- GitHub stars
- 74k
- Token cost
- ~416 tokens
- SKILL.md length
- 150 words
- Files
- 2 (incl. references)
- Skills in repo
- 390
- Repo updated
- First seen
- Licence
- MIT
At a glance
A skill your agent uses when reviewing stylesheets, component styles, and responsive behavior related to Load CSS without blocking render.
- Reviewing stylesheets
- SKILL.md covers Quick Reference, Check, Fix and Explain, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Component styles
What it does
CSS Non Blocking is an agent skill from thedaviddias/Front-End-Checklist. Use when reviewing stylesheets, component styles, and responsive behavior related to Load CSS without blocking render. Check the rendered layout across breakpoints and interaction states before proposing a fix.
Its SKILL.md is about 420 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/rule.md`).
It sits in Frontend & Design, covering CSS and styling and Responsive design. The repository describes itself as: 🗂 The essential checklist for modern web development, for humans and AI agents. The licence is MIT.
When your agent uses it
- Reviewing stylesheets
- Component styles
- Responsive behavior related to Load CSS without blocking render
Example prompts
- “/css-non-blocking”
What it can do on your machine
Read from SKILL.md and the folder at commit e8d14d0. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
frontendchecklist.io
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
CSS Non Blocking loads about 416 tokens when it runs, and up to ~2.3k if it reads all its reference files. Until then it costs about 57 tokens; SKILL.md has 150 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from thedaviddias/Front-End-Checklist at commit e8d14d0, republished under its MIT licence (© thedaviddias). 150 words, ~416 tokens.
Download SKILL.mdSave it as
.claude/skills/css-non-blocking/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- css-non-blocking
- description
- Use when reviewing stylesheets, component styles, and responsive behavior related to Load CSS without blocking render. Check the rendered layout across breakpoints and interaction states before proposing a fix.
- metadata.category
- css
- metadata.priority
- high
- metadata.difficulty
- intermediate
- metadata.estimatedTime
- 20
- metadata.source
- frontendchecklist.io
- metadata.url
- https://frontendchecklist.io/rules/css/css-non-blocking
Load CSS without blocking render
Render-blocking CSS delays First Contentful Paint—users see a blank screen while waiting for stylesheets to download and parse.
Quick Reference
- Use
<link rel="preload" as="style">with onload handler - Inline critical CSS, defer non-critical styles
- Use media queries to split CSS by viewport/feature
- Modern: Next.js/Vite handle this automatically
Check
Analyze this CSS loading implementation to ensure stylesheets are loaded without blocking the DOM parsing and rendering process.
Fix
Implement non-blocking CSS loading using the preload technique with media attributes and loadCSS polyfill for better performance.
Explain
Explain how non-blocking CSS loading improves page performance by preventing render-blocking resources from delaying the initial paint.
Code Review
Review stylesheets, component styles, and responsive states related to Load CSS without blocking render. Flag exact selectors, declarations, or breakpoints that violate the rule in the rendered UI.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/rules/css/css-non-blocking
© thedaviddias, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file (references) in skills/css-non-blocking of thedaviddias/Front-End-Checklist.
- SKILL.md
- references/rule.md
Open the folder on GitHubat commit e8d14d0
Compare with similar skills
CSS Non Blocking next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| CSS Non Blocking this skillthedaviddias/Front-End-Checklist | 74k | — | ~416 | Automated safety check: Pass | MIT | |
| UI StylingOhh-889/skyroc | 795 | 13 repos | ~2.5k | Automated safety check: Pass | MIT | |
| Frontend Design Routercode-yeongyu/oh-my-openagent | 70k | — | ~5.3k | Automated safety check: Pass | Custom licence | |
| Refero Designreferodesign/refero_skill | 295 | — | ~5.3k | Automated safety check: Pass | MIT | |
| Tailwind CSS Patternsever-works/ever-works | 158 | 3 repos | ~1.6k | Automated safety check: Notes | AGPL-3.0 | |
| Good CSSvojtaholik/good-css | 120 | — | ~1.2k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about CSS Non Blocking
What does CSS Non Blocking do?
A skill your agent uses when reviewing stylesheets, component styles, and responsive behavior related to Load CSS without blocking render. CSS Non Blocking is an agent skill from thedaviddias/Front-End-Checklist. Use when reviewing stylesheets, component styles, and responsive behavior related to Load CSS without blocking render.
When should I use CSS Non Blocking?
CSS Non Blocking fits situations like: reviewing stylesheets; component styles; responsive behavior related to Load CSS without blocking render.
How do I install CSS Non Blocking in Claude Code?
Run `npx skills add thedaviddias/Front-End-Checklist --skill css-non-blocking -a claude-code`. Or copy the skill folder (skills/css-non-blocking in thedaviddias/Front-End-Checklist) into .claude/skills/css-non-blocking in your project. Claude Code loads it when a task matches its description.
How do I install CSS Non Blocking in Codex?
Run `npx skills add thedaviddias/Front-End-Checklist --skill css-non-blocking -a codex`. Or copy the skill folder (skills/css-non-blocking in thedaviddias/Front-End-Checklist) into .agents/skills/css-non-blocking in your project. Codex loads it when a task matches its description.
Can I use CSS Non Blocking in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add thedaviddias/Front-End-Checklist --skill css-non-blocking -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/css-non-blocking, .gemini/skills/css-non-blocking, .github/skills/css-non-blocking and .opencode/skills/css-non-blocking in your project.
What does CSS Non Blocking need to run?
SKILL.md names no scripts, command-line tools or credentials: CSS Non Blocking is instructions for the agent only.
Does CSS Non Blocking access the network?
SKILL.md names 1 domain. As links in the text: frontendchecklist.io. This is read from the text; nothing was executed.
Is CSS Non Blocking safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does CSS Non Blocking use?
CSS Non Blocking is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does CSS Non Blocking use?
About 416 tokens (SKILL.md is roughly 1.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.8k tokens, read only when the agent opens those files.
What are the alternatives to CSS Non Blocking?
Skills that share tags, products or a category with CSS Non Blocking: UI Styling (Ohh-889/skyroc, 795 stars), Frontend Design Router (code-yeongyu/oh-my-openagent, 70k stars), Refero Design (referodesign/refero_skill, 295 stars) and Tailwind CSS Patterns (ever-works/ever-works, 158 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains CSS Non Blocking?
thedaviddias (a GitHub user) maintains it in thedaviddias/Front-End-Checklist, which has 74,398 GitHub stars. The repository holds 390 skills in this directory. The repository was last updated on October 6, 2026.
Source: thedaviddias/Front-End-Checklist on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.