Frontend Design Router
code-yeongyu/oh-my-openagent
Routes frontend and UI work through design reference rulesets, with a design-system gate plus layout and print guidance, before any UI code is written.
Builds adaptive web interfaces using Flexbox, CSS Grid, and media queries with a mobile-first approach.
Install Responsive Web Design
$ npx skills add secondsky/claude-skills --skill responsive-web-design -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install secondsky/claude-skills responsive-web-design --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/secondsky/claude-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/responsive-web-design/skills/responsive-web-design .claude/skills/responsive-web-design && 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 "responsive-web-design" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/responsive-web-design/skills/responsive-web-design into .claude/skills/responsive-web-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "responsive-web-design", 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/secondsky/claude-skills/tree/main/plugins/responsive-web-design/skills/responsive-web-designType 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 secondsky/claude-skills --skill responsive-web-design -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install secondsky/claude-skills responsive-web-design --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/responsive-web-design/skills/responsive-web-design .agents/skills/responsive-web-design && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "responsive-web-design" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/responsive-web-design/skills/responsive-web-design into .agents/skills/responsive-web-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "responsive-web-design", 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 secondsky/claude-skills --skill responsive-web-design -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install secondsky/claude-skills responsive-web-design --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/responsive-web-design/skills/responsive-web-design .cursor/skills/responsive-web-design && 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 "responsive-web-design" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/responsive-web-design/skills/responsive-web-design into .cursor/skills/responsive-web-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "responsive-web-design", 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/secondsky/claude-skills.git --path plugins/responsive-web-design/skills/responsive-web-design--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 secondsky/claude-skills --skill responsive-web-design -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install secondsky/claude-skills responsive-web-design --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/responsive-web-design/skills/responsive-web-design .gemini/skills/responsive-web-design && 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 "responsive-web-design" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/responsive-web-design/skills/responsive-web-design into .gemini/skills/responsive-web-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "responsive-web-design", 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 secondsky/claude-skills responsive-web-designInstalls 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 secondsky/claude-skills --skill responsive-web-design -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/responsive-web-design/skills/responsive-web-design .github/skills/responsive-web-design && 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 "responsive-web-design" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/responsive-web-design/skills/responsive-web-design into .github/skills/responsive-web-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "responsive-web-design", 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 secondsky/claude-skills --skill responsive-web-design -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install secondsky/claude-skills responsive-web-design --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/responsive-web-design/skills/responsive-web-design .opencode/skills/responsive-web-design && 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 "responsive-web-design" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/responsive-web-design/skills/responsive-web-design into .opencode/skills/responsive-web-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "responsive-web-design", 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
responsive-web-design- GitHub stars
- 227
- Token cost
- ~515 tokens
- SKILL.md length
- 68 words
- Files
- 1
- Skills in repo
- 169
- Repo updated
- First seen
- Licence
- MIT
At a glance
Builds adaptive web interfaces using Flexbox, CSS Grid, and media queries with a mobile-first approach.
- Creating multi-device layouts
- SKILL.md covers Mobile-First Media Queries, Flexible Grid, Fluid Typography and Responsive Images, plus 3 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Implementing flexible UI systems
What it does
Responsive Web Design is an agent skill from secondsky/claude-skills. Builds adaptive web interfaces using Flexbox, CSS Grid, and media queries with a mobile-first approach. Use when creating multi-device layouts, implementing flexible UI systems, or ensuring cross-browser compatibility.
Its SKILL.md is about 520 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Frontend & Design, covering CSS and styling, Responsive design and Frontend development. The repository describes itself as: Production-ready skills for Claude Code CLI - Cloudflare, React, Tailwind v4, and AI integrations. The licence is MIT.
When your agent uses it
- Creating multi-device layouts
- Implementing flexible UI systems
- Ensuring cross-browser compatibility
Example prompts
- “Use the responsive-web-design skill to build adaptive web interfaces using Flexbox, CSS Grid, and media queries with a mobile-first approach”
- “/responsive-web-design”
What it can do on your machine
Read from SKILL.md and the folder at commit 8837836. 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 (its code samples are css).
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):
developer.mozilla.org
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
Responsive Web Design loads about 515 tokens when it runs. Until then it costs about 60 tokens; SKILL.md has 68 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 secondsky/claude-skills at commit 8837836, republished under its MIT licence (© secondsky). 68 words, ~515 tokens.
Download SKILL.mdSave it as
.claude/skills/responsive-web-design/SKILL.md (or your agent's skills folder).- name
- responsive-web-design
- description
- Builds adaptive web interfaces using Flexbox, CSS Grid, and media queries with a mobile-first approach. Use when creating multi-device layouts, implementing flexible UI systems, or ensuring cross-browser compatibility.
- license
- MIT
Responsive Web Design
Build adaptive interfaces using modern CSS techniques for all screen sizes.
Mobile-First Media Queries
/* Base: Mobile (320px+) */
.container {
padding: 1rem;
}
/* Tablet (640px+) */
@media (min-width: 640px) {
.container {
padding: 2rem;
max-width: 640px;
margin: 0 auto;
}
}
/* Desktop (1024px+) */
@media (min-width: 1024px) {
.container {
max-width: 1024px;
}
}Flexible Grid
.grid {
display: grid;
gap: 1rem;
grid-template-columns: 1fr; /* Mobile: single column */
}
@media (min-width: 640px) {
.grid {
grid-template-columns: repeat(2, 1fr); /* Tablet: 2 columns */
}
}
@media (min-width: 1024px) {
.grid {
grid-template-columns: repeat(3, 1fr); /* Desktop: 3 columns */
}
}Fluid Typography
/* Scales smoothly between breakpoints */
h1 {
font-size: clamp(1.5rem, 4vw, 3rem);
}
p {
font-size: clamp(1rem, 2vw, 1.25rem);
}Responsive Images
img {
max-width: 100%;
height: auto;
}
.hero-image {
width: 100%;
aspect-ratio: 16 / 9;
object-fit: cover;
}Flexbox Navigation
.nav {
display: flex;
flex-direction: column;
gap: 0.5rem;
}
@media (min-width: 768px) {
.nav {
flex-direction: row;
justify-content: space-between;
align-items: center;
}
}Best Practices
- Start with mobile styles first
- Use flexible units (%, rem, vw)
- Test on real devices
- Ensure minimum 48px touch targets
- Maintain readable line lengths (45-75 chars)
- Use CSS Grid for 2D layouts, Flexbox for 1D
Resources
© secondsky, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in plugins/responsive-web-design/skills/responsive-web-design of secondsky/claude-skills.
Open the folder on GitHubat commit 8837836
Compare with similar skills
Responsive Web Design 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 |
|---|---|---|---|---|---|---|
| Responsive Web Design this skillsecondsky/claude-skills | 227 | — | ~515 | Automated safety check: Pass | MIT | |
| Frontend Design Routercode-yeongyu/oh-my-openagent | 70k | — | ~5.3k | Automated safety check: Pass | Custom licence | |
| Using Ouds Web Version Major MinorOrange-OpenSource/Orange-Boosted-Bootstrap | 222 | — | ~4.1k | Automated safety check: Pass | MIT | |
| UI StylingOhh-889/skyroc | 795 | 13 repos | ~2.5k | Automated safety check: Pass | MIT | |
| Design StyleCastor6/tactus | 376 | 1 repos | ~2.1k | Automated safety check: Pass | Apache-2.0 | |
| Refero Designreferodesign/refero_skill | 292 | — | ~5.3k | Automated safety check: Pass | MIT |
Similar skills
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Orange-OpenSource/Orange-Boosted-Bootstrap
Provides comprehensive knowledge of the OUDS Web library (Orange Unified Design System for Web), a Bootstrap-based CSS/JS framework for building Orange-branded web interfaces.
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.
Design Style
Castor6/tactus
A skill your agent uses whenever the user asks to build, create, design, develop, improve, or style any frontend interface or visual element.
Refero Design
referodesign/refero_skill
Primary/default skill for UI design, product design, web design, landing pages, dashboards, product screens, redesigns, visual polish, frontend/CSS styling, design systems, components, responsive…
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ever-works/ever-works
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Related
Categories
Questions about Responsive Web Design
What does Responsive Web Design do?
Builds adaptive web interfaces using Flexbox, CSS Grid, and media queries with a mobile-first approach. Responsive Web Design is an agent skill from secondsky/claude-skills. Builds adaptive web interfaces using Flexbox, CSS Grid, and media queries with a mobile-first approach.
When should I use Responsive Web Design?
Responsive Web Design fits situations like: creating multi-device layouts; implementing flexible UI systems; ensuring cross-browser compatibility.
How do I install Responsive Web Design in Claude Code?
Run `npx skills add secondsky/claude-skills --skill responsive-web-design -a claude-code`. Or copy the skill folder (plugins/responsive-web-design/skills/responsive-web-design in secondsky/claude-skills) into .claude/skills/responsive-web-design in your project. Claude Code loads it when a task matches its description.
How do I install Responsive Web Design in Codex?
Run `npx skills add secondsky/claude-skills --skill responsive-web-design -a codex`. Or copy the skill folder (plugins/responsive-web-design/skills/responsive-web-design in secondsky/claude-skills) into .agents/skills/responsive-web-design in your project. Codex loads it when a task matches its description.
Can I use Responsive Web Design 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 secondsky/claude-skills --skill responsive-web-design -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/responsive-web-design, .gemini/skills/responsive-web-design, .github/skills/responsive-web-design and .opencode/skills/responsive-web-design in your project.
What does Responsive Web Design need to run?
SKILL.md names no scripts, command-line tools or credentials: Responsive Web Design is instructions for the agent only.
Does Responsive Web Design access the network?
SKILL.md names 1 domain. As links in the text: developer.mozilla.org. This is read from the text; nothing was executed.
Is Responsive Web Design 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 Responsive Web Design use?
Responsive Web Design is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Responsive Web Design use?
About 515 tokens (SKILL.md is roughly 2.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Responsive Web Design?
Skills that share tags, products or a category with Responsive Web Design: Frontend Design Router (code-yeongyu/oh-my-openagent, 70k stars), Using Ouds Web Version Major Minor (Orange-OpenSource/Orange-Boosted-Bootstrap, 222 stars), UI Styling (Ohh-889/skyroc, 795 stars) and Design Style (Castor6/tactus, 376 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Responsive Web Design?
secondsky (a GitHub user) maintains it in secondsky/claude-skills, which has 227 GitHub stars. The repository holds 169 skills in this directory. The repository was last updated on September 28, 2026.
Source: secondsky/claude-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.