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Agent skill

Responsive Engine

by EliasOulkadi in EliasOulkadi/shokunin

Design multi-device layouts with Container Queries, clamp() fluid typography, :has() selector, subgrid, and modern CSS units (dvh/svh/lvh).

MITAuto-check passedFrontend & Design

Install Responsive Engine

skills CLI
$ npx skills add EliasOulkadi/shokunin --skill responsive-engine -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install EliasOulkadi/shokunin responsive-engine --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/EliasOulkadi/shokunin.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.pack/skills/responsive-engine .claude/skills/responsive-engine && rm -rf skills-src

Use ~/.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/

Facts

Skill name
responsive-engine
GitHub stars
114
Token cost
~3.2k tokens
SKILL.md length
1,128 words
Files
5 (incl. scripts, references, assets)
Skills in repo
49
Repo updated
First seen
Licence
MIT

At a glance

Design multi-device layouts with Container Queries, clamp() fluid typography, :has() selector, subgrid, and modern CSS units (dvh/svh/lvh).

  • Works in 6 steps: Audit existing layout → Establish container query boundaries → Replace fixed units with fluid units → …
  • User asks to make a layout responsive
  • SKILL.md covers Core Principle, Container Queries (preferred…, Form Factor Detection and Viewport Unit Decision Tree, plus 13 more sections
  • Runs Shell scripts from its folder

What it does

Responsive Engine is an agent skill from EliasOulkadi/shokunin. Design multi-device layouts with Container Queries, clamp() fluid typography, :has() selector, subgrid, and modern CSS units (dvh/svh/lvh). Use when user asks to make a layout responsive, handle mobile/tablet/desktop breakpoints, create fluid typography, or use Container Queries. Do NOT use for full-page layouts (use landing-craft), component design (use component-forge), or animation-specific responsive (use motion-craft).

Its SKILL.md is about 3.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 7 other files, including scripts, reference files and assets (for example `references/container-queries-deep.md`, `references/responsive-patterns.md` and `scripts/generate-fluid-scale.sh`). Compatibility notes: opencode

It sits in Frontend & Design, covering Responsive design and Typography. The repository describes itself as: 職人 Shokunin 62 AI agent skills for OpenCode, Claude Code, Cursor, Windsurf. ChromaDB memory, MCP servers, declarative self-updates. Multi-model, open source, zero cost. The licence is MIT.

When your agent uses it

  • User asks to make a layout responsive
  • Handle mobile/tablet/desktop breakpoints
  • Create fluid typography
  • Use Container Queries

Example prompts

  • “/responsive-engine”

Requirements

  • A Bash shell
  • Compatibility (from SKILL.md): opencode

Workflow steps

6 steps, taken from the step headings in SKILL.md.

  1. Audit existing layout
  2. Establish container query boundaries
  3. Replace fixed units with fluid units
  4. Write mobile collapse rules
  5. Add form factor and accessibility guards
  6. Verify across devices

What it can do on your machine

Read from SKILL.md and the folder at commit 4c68e5b. 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

    Ships 1 file in scripts/ (Shell), which the agent can run.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    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.

  • Compatibility

    opencode

    From compatibility in the SKILL.md frontmatter.

Context cost

Responsive Engine loads about 3.2k tokens when it runs, and up to ~9.1k if it reads all its reference files. Until then it costs about 111 tokens; SKILL.md has 1,128 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~111
When it runs · the whole SKILL.md, loaded when a task matches
~3.2k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~9.1k

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); the scripts in this folder are not scanned.

SKILL.md

The full file from EliasOulkadi/shokunin at commit 4c68e5b, republished under its MIT licence (© EliasOulkadi). 1,128 words, ~3,226 tokens.

Download SKILL.mdSave it as .claude/skills/responsive-engine/SKILL.md (or your agent's skills folder). This skill also uses 4 other files; get the full folder from GitHub.
name
responsive-engine
description
Design multi-device layouts with Container Queries, clamp() fluid typography, :has() selector, subgrid, and modern CSS units (dvh/svh/lvh). Use when user asks to make a layout responsive, handle mobile/tablet/desktop breakpoints, create fluid typography, or use Container Queries. Do NOT use for full-page layouts (use landing-craft), component design (use component-forge), or animation-specific responsive (use motion-craft).
compatibility
opencode
triggers
responsive design, responsive layout, mobile layout, container queries, fluid typography, clamp, mobile responsive, responsive grid, multi-device, subgrid…
negatives
page layout, full landing page, components, animations
license
MIT
metadata.workflow
frontend
metadata.audience
developers
metadata.version
4.0.0
metadata.author
shokunin

Responsive Engine

Layouts that work at every screen size without breakpoint spaghetti. Inspired by Ahmad Shadeed (Container Queries), Jen Simmons (Intrinsic Web Design), and the CSS Working Group.

Core Principle

Responsive design is about containers, not viewports. Use Container Queries first, media queries only for global layout shifts and form factor detection.

Container Queries (preferred over media queries)

css
.card-grid {
  container-type: inline-size;
  container-name: card-grid;
}

@container card-grid (min-width: 600px) {
  .card {
    display: grid;
    grid-template-columns: 200px 1fr;
  }
}

@container card-grid (min-width: 900px) {
  .card {
    grid-template-columns: 1fr 1fr 1fr;
  }
}
Container query length units
css
.card {
  padding: 10cqw;      /* 10% of container width */
  font-size: 5cqi;     /* 5% of container inline size */
  margin-block: 2cqb;  /* 2% of container block size */
  border-radius: 1cqmin; /* 1% of container smaller side */
}

Form Factor Detection

Detect the device type, not just width.

css
/* Touch vs mouse */
@media (pointer: coarse) {
  .button { min-height: 48px; }
}

@media (hover: hover) {
  .card:hover { transform: scale(1.02); }
}

@media (hover: none) {
  .card:active { transform: scale(0.98); }
}

/* Portrait vs landscape */
@media (orientation: portrait) {
  .hero-grid { grid-template-columns: 1fr; }
}

Viewport Unit Decision Tree

Use caseUnitWhy
Full-screen heromin-h-[100dvh]Adapts to URL bar on mobile. Never 100vh — iOS Safari viewport jumps.
Minimum safe heightmin-height: 100svhSmall viewport height. Fallback for when URL bar is visible.
Large viewport design100lvhMaximum when URL bar hidden. Only for desktop-like experiences.
Width-baseddvwDynamic viewport width. Avoid on scroll-zooming mobile pages.
css
.hero {
  height: 100dvh;
  min-height: 100svh;  /* Fallback: never smaller than smallest viewport */
}
The h-screen ban

h-screen equals 100vh which equals disaster on iOS Safari. The URL bar entering/exiting causes catastrophic layout jumps. Always use min-h-[100dvh].

Fluid Typography

css
:root {
  --text-sm:      clamp(0.875rem, 0.8rem + 0.25vw, 1rem);
  --text-base:    clamp(1rem, 0.9rem + 0.35vw, 1.25rem);
  --text-lg:      clamp(1.25rem, 1rem + 0.75vw, 1.75rem);
  --text-xl:      clamp(1.5rem, 1rem + 1.5vw, 2.5rem);
  --text-2xl:     clamp(1.75rem, 1.25rem + 2vw, 3rem);
  --text-3xl:     clamp(2rem, 1.5rem + 3vw, 4rem);
  --text-display: clamp(2.5rem, 1.5rem + 5vw, 6rem);
}
Fluid spacing
css
:root {
  --space-xs: clamp(0.25rem, 0.2rem + 0.25vw, 0.5rem);
  --space-sm: clamp(0.5rem, 0.4rem + 0.5vw, 1rem);
  --space-md: clamp(1rem, 0.8rem + 1vw, 2rem);
  --space-lg: clamp(2rem, 1.5rem + 2vw, 4rem);
  --space-xl: clamp(3rem, 2rem + 3vw, 6rem);
  --space-2xl: clamp(4rem, 3rem + 5vw, 10rem);
}

Subgrid

css
.card-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.card {
  display: grid;
  grid-template-rows: subgrid;
  grid-row: span 3;
}

All children across cards align to the same row heights.

Parent-Based Responsive with :has()

css
/* Sidebar mode: when parent has class .sidebar */
.sidebar:has(.card) .card {
  flex-direction: column;
  text-align: center;
}

/* Card layout changes based on number of siblings */
.grid:has(> :last-child:nth-child(3)) .item {
  grid-column: span 1;
}

/* Detect empty state */
.container:has(.empty-state) {
  justify-content: center;
}

Fallback check:

css
@supports not selector(:has(*)) {
  .grid .item { grid-column: span 1; } /* fallback */
}

Touch Target Physics

ElementMinimumRecommended
Button44×44px48×48px
Link in nav44×44px48×48px
Checkbox / radio24×24px32×32px (invisible hit area)
Input field44px height48px height
Gap between touchable8px12px
css
.interactive {
  min-width: 44px;
  min-height: 44px;
}

/* Invisible hit area for small controls */
.small-control::after {
  content: '';
  position: absolute;
  inset: -8px;  /* expands hit area without visual change */
}

Layout Strategy by Device

Each layout archetype needs a mobile collapse rule.

Desktop layoutMobile collapse
3 columns1 column stack (grid-cols-1)
Split screen 50/50Full-width stack (w-full)
Asymmetric grid (2fr 1fr)grid-template-columns: 1fr, remove all col-span overrides
Horizontal scrollPreserve if content is images/cards, restack if text
Overlapping elementsRemove all negative margins and rotations below 768px
Sidebar + contentStack: sidebar collapses to top (or hamburger)
css
/* Universal mobile collapse */
@media (max-width: 767px) {
  .split-layout { grid-template-columns: 1fr; }
  .asymmetric-grid { grid-template-columns: 1fr; }
  .overlap-card { margin-top: 0; transform: none; }
  [class*="col-span"] { grid-column: span 1; }
}

Breakpoint System (global layout only)

NameWidthTarget
sm640pxMobile landscape
md768pxTablet portrait
lg1024pxTablet landscape / small desktop
xl1280pxDesktop
2xl1536pxLarge desktop

Never add a breakpoint "just in case." If you have more than 4 breakpoints, refactor to Container Queries.

Testing Checklist

  • Content does not overflow on 320px width
  • No horizontal scroll on any breakpoint
  • Text readable without zoom (min 16px body)
  • Images scale correctly at all sizes
  • Navigation usable at all breakpoints
  • Forms not broken on mobile
  • Tables have horizontal scroll or responsive variant
  • Container Queries used over media queries where possible
  • h-screen replaced with min-h-[100dvh] everywhere
  • Touch targets ≥ 44×44px with 8px gap
  • Fixed widths in px replaced with clamp(), %, cqi
  • Asymmetric layouts collapse to 1 column below 768px
  • Overlapping elements separated on mobile
  • :has() guarded with @supports fallback

Error Handling

ProblemCauseFix
Horizontal scrollbar on mobileFixed-width element > viewportReplace px with clamp(), %, or 100%
Layout jump on iOS Safarih-screen usedReplace with min-h-[100dvh]
Text unreadable on mobileBody font < 16pxMinimum 16px, scale with clamp()
Touch target too smallClickable < 44pxExpand hit area with padding or ::after
Container Query not workingMissing container-typeSet container-type: inline-size on parent
Subgrid rows not alignedMissing grid-template-rows: subgridVerify parent has explicit rows
100vh causes scrollDidn't account for URL barUse dvh or svh
Hover effect fires on touchNo @media (hover: hover) guardGate hover behind pointer media query

Anti-Patterns

Anti-patternFix
Media queries for component responsivenessContainer Queries
Fixed widths in pxclamp(), %, dvw, or cqi/cqw
Hover-only interactions on mobileAdd @media (hover: hover) guard
Touch targets < 44pxInteractive elements ≥ 44×44px
Body font < 16pxMinimum 16px, clamp() for fluid scaling
No :has() fallback@supports selector(:has(*)) guard
Deeply nested media queriesContainer Queries eliminate most
h-screen for full-heightmin-h-[100dvh]
Same layout at all sizesLayout must collapse on mobile
Asymmetric layout stays asymmetric on mobileForce 1-column below 768px
Overlapping elements on touchSeparate on mobile. Touch layers cause mis-taps.
calc() with mixed units for gridUse CSS Grid fr units + minmax()
Complex flexbox math (w-[calc(33%-1rem)])CSS Grid grid-cols-3 with gap
Testing only at desktop widthTest at 320px, 375px, 768px, 1024px, 1440px
Show full SKILL.md (487 more words)Show less

Pre-Flight Checklist

Before delivering responsive layout code:

  • No horizontal scroll at any width (tested at 320px)
  • min-h-[100dvh] used instead of h-screen
  • Body font ≥ 16px at all widths
  • Touch targets ≥ 44×44px, gap ≥ 8px
  • Media queries only for global layout shifts
  • Container Queries for component responsiveness
  • Asymmetric layouts collapse to single column below 768px
  • Overlapping elements separated on mobile
  • Hover interactions gated behind @media (hover: hover)
  • Images have width/height attributes + object-fit or aspect-ratio
  • Forms single-column on mobile, large inputs (44px+)
  • :has() fallbacks defined
  • No px-only spacing — use fluid or relative units
  • Grid used instead of complex flexbox math
  • Table has responsive wrapper or data-label approach
  • Navigation is usable via touch at all widths

Sources

  • Ahmad Shadeed — Container Queries deep dive (ishadeed.com)
  • Jen Simmons — Intrinsic Web Design
  • CSS Container Queries (MDN)
  • CSS :has() selector (MDN)
  • CSS Subgrid (MDN)
  • web.dev — Responsive and fluid typography with clamp()
  • New Viewport Units (dvh, svh, lvh) — web.dev
  • Every Layout — responsive layout patterns
  • WCAG 2.2 — Touch target size
  • iOS Safari viewport bug documentation (WebKit blog)

Workflow

Step 1: Audit existing layout

Before writing any CSS, identify what's broken:

  • Open Chrome DevTools Device Toolbar (Ctrl+Shift+M)
  • Test at 320px, 375px, 768px, 1024px, 1440px
  • Flag: horizontal scrollbars, overflowing content, text < 16px, touch targets < 44px
  • Screenshot at each breakpoint for before/after comparison
Step 2: Establish container query boundaries
  1. Identify components needing independent responsiveness (cards, sidebars, grid items)
  2. Set container-type: inline-size on their direct parent
  3. Name containers with container-name for complex nested layouts
  4. Replace any media queries targeting those components with @container rules
Step 3: Replace fixed units with fluid units
  1. Find all px values for widths, font sizes, spacing
  2. Convert fonts to clamp() (minimum, preferred, maximum)
  3. Convert spacing to clamp() or relative units (%, cqi, cqw)
  4. Replace h-screen with min-h-[100dvh] everywhere
Step 4: Write mobile collapse rules
  1. Identify asymmetric layouts, overlapping elements, multi-column grids
  2. Write @media (max-width: 767px) block collapsing everything to single column
  3. Remove negative margins and rotations on mobile
  4. Ensure touch targets >= 44x44px with 8px gap between interactive elements
Step 5: Add form factor and accessibility guards
  1. Gate hover effects behind @media (hover: hover)
  2. Gate fine-pointer interactions behind @media (pointer: fine)
  3. Add @supports selector(:has(*)) fallbacks for all :has() selectors
  4. Respect prefers-reduced-motion on all animations
  5. Set minimum body font-size to 16px
Step 6: Verify across devices
  1. No horizontal scroll at any width from 320px to 2560px
  2. min-h-[100dvh] replaces all h-screen instances
  3. Touch targets >= 44x44px with 8px gap
  4. Container Queries used for component responsiveness
  5. Asymmetric layouts collapse to single column below 768px
  6. All :has() selectors guarded with @supports fallback

Checklist

  • Skill loads without errors in the AI agent
  • YAML frontmatter is valid (description, compatibility, audience)
  • Workflow section provides clear step-by-step instructions
  • Error handling section covers common failure modes
  • All referenced files (references/, scripts/, assets/) exist
  • Skill triggers correctly for intended use cases
  • No broken links or missing resources

© EliasOulkadi, 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 4 other files (scripts, references, assets) in .pack/skills/responsive-engine of EliasOulkadi/shokunin.

  • SKILL.md
  • assets/reset.css
  • references/container-queries-deep.md
  • references/responsive-patterns.md
  • scripts/generate-fluid-scale.sh

Open the folder on GitHubat commit 4c68e5b

Compare with similar skills

Responsive Engine 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.

Responsive Engine compared with similar skills
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UI UX Pro MaxOhh-889/skyroc7956 repos~14kAutomated safety check: PassMIT
Distinctive UI Buildertw93/Waza7.2k—~3.7kAutomated safety check: PassMIT
Using Ouds Web Version Major MinorOrange-OpenSource/Orange-Boosted-Bootstrap222—~4.2kAutomated safety check: PassMIT
Tailwindcss Developmentcachethq/core230—~1.1kAutomated safety check: PassMIT

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Categories

Questions about Responsive Engine

What does Responsive Engine do?

Design multi-device layouts with Container Queries, clamp() fluid typography, :has() selector, subgrid, and modern CSS units (dvh/svh/lvh). Responsive Engine is an agent skill from EliasOulkadi/shokunin. Design multi-device layouts with Container Queries, clamp() fluid typography, :has() selector, subgrid, and modern CSS units (dvh/svh/lvh).

When should I use Responsive Engine?

Responsive Engine fits situations like: user asks to make a layout responsive; handle mobile/tablet/desktop breakpoints; create fluid typography; use Container Queries.

How do I install Responsive Engine in Claude Code?

Run `npx skills add EliasOulkadi/shokunin --skill responsive-engine -a claude-code`. Or copy the skill folder (.pack/skills/responsive-engine in EliasOulkadi/shokunin) into .claude/skills/responsive-engine in your project. Claude Code loads it when a task matches its description.

How do I install Responsive Engine in Codex?

Run `npx skills add EliasOulkadi/shokunin --skill responsive-engine -a codex`. Or copy the skill folder (.pack/skills/responsive-engine in EliasOulkadi/shokunin) into .agents/skills/responsive-engine in your project. Codex loads it when a task matches its description.

Can I use Responsive Engine 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 EliasOulkadi/shokunin --skill responsive-engine -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-engine, .gemini/skills/responsive-engine, .github/skills/responsive-engine and .opencode/skills/responsive-engine in your project.

What does Responsive Engine need to run?

Going by SKILL.md and its folder, Responsive Engine needs a shell for the scripts in its folder. Our summary lists: A Bash shell. Compatibility (from SKILL.md): opencode.

Does Responsive Engine access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Responsive Engine 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Responsive Engine use?

Responsive Engine 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 Engine use?

About 3.2k tokens (SKILL.md is roughly 13k 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 5.9k tokens, read only when the agent opens those files.

What are the alternatives to Responsive Engine?

Skills that share tags, products or a category with Responsive Engine: Tailwind CSS Patterns (ever-works/ever-works, 162 stars), UI UX Pro Max (Ohh-889/skyroc, 795 stars), Distinctive UI Builder (tw93/Waza, 7.2k stars) and Using Ouds Web Version Major Minor (Orange-OpenSource/Orange-Boosted-Bootstrap, 222 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Responsive Engine?

EliasOulkadi (a GitHub user) maintains it in EliasOulkadi/shokunin, which has 114 GitHub stars. The repository holds 49 skills in this directory. The repository was last updated on October 5, 2026.

Source: EliasOulkadi/shokunin on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.