responsive-helper

A design helper for making web pages adapt to different screen sizes, such as phones, tablets, and desktops. It covers layout breakpoints, flexible text sizing, and components that respond to their available space.

In plain words
What is it for?
Use it when creating or adjusting responsive websites, including navigation, grids, images, tables, forms, and typography.
Why use it?
It helps avoid layouts that look good on one screen but break or become hard to use on another.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/andronics/claude-plugin-css-pro/responsive-helper
Any agent
npx skills add andronics/claude-plugin-css-pro --skill responsive-helper
Clone the repo
git clone --depth 1 https://github.com/andronics/claude-plugin-css-pro

Made for: Claude Code, Codex.

Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,386 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00038 $0.03386
Opus 5 $0.00019 $0.01693
Sonnet 5 $0.00008 $0.00677
Haiku 4.5 $0.00004 $0.00339

Measured 2d ago against content hash 4c6958d0d72f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

responsive-helper 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 2d 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.

skills/responsive-helper/SKILL.md · 648 lines

How it starts

The opening of the file, as written. The whole thing — 648 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Responsive Helper Skill

This skill helps you create responsive designs that work beautifully across all devices. I'll guide you through responsive patterns, breakpoint strategies, and modern techniques like container queries and fluid typography.

What I Can Help With

Breakpoint Design

  • Define appropriate breakpoints
  • Mobile-first vs desktop-first strategies
  • Custom breakpoint systems
  • Content-based breakpoints

Fluid Typography

  • Responsive font sizing with clamp()
  • Modular scale systems
  • Viewport-based sizing
  • Accessible responsive text

Container Queries

  • Component-responsive layouts
  • Container-based breakpoints
  • Intrinsic responsive design
  • Container query units

Responsive Patterns

  • Grid systems
  • Navigation patterns
  • Image handling
  • Table responsiveness
  • Form layouts

Standard Breakpoint System

Common Device Breakpoints

/* Mobile-first approach (recommended) */
/* Base styles: Mobile (< 640px) */

@media (min-width: 640px) {
  /* Small tablet / Large phone (sm) */
}

@media (min-width: 768px) {
  /* Tablet (md) */
}

@media (min-width: 1024px) {
  /* Desktop (lg) */
}

@media (min-width: 1280px) {
  /* Large desktop (xl) */
}

@media (min-width: 1536px) {
  /* Extra large desktop (2xl) */
}

Custom Property Breakpoints

:root {
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* Can't use in media queries directly, but useful for JavaScript */

Mobile-First vs Desktop-First

Mobile-First (Recommended)

/* Base: Mobile styles (< 640px) */
.container {
  padding: 1rem;
  font-size: 1rem;
}

.grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Add complexity as screen grows */
@media (min-width: 768px) {
  .container {
    padding: 2rem;
    font-size: 1.125rem;
  }

  .grid {
    flex-direction: row;
    gap: 2rem;
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 3rem;
    font-size: 1.25rem;
  }

  .grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
  }
}

Read the full file on GitHub · 648 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. 2d ago First seen · 648 lines · 38 tokens per session scan A 4c6958d0d72f

Subscribe to this mod's changes

responsive-helper is a skill published in the GitHub repository andronics/claude-plugin-css-pro (2 stars, last pushed 10mo ago), licensed MIT. It adds 38 tokens to every session and 3,386 once invoked, about $0.0002 per session on Opus 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 2026-08-31.

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