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responsive-web-design

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.

Quality

89%

Does it follow best practices?

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SKILL.md
Quality
Evals
Security

Quality

Content

90%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

An exemplary lean, code-first skill body: executable, copy-paste-ready CSS patterns for the common responsive cases with zero padding or over-explanation. Its only soft spots are that the mobile-first application order is demonstrated but never stated as an explicit workflow, and the intro is a single line where a brief orientation would help.

Suggestions

Add a short 'How to apply' note stating the workflow order explicitly (write base mobile styles first, then layer min-width media queries at 640px/768px/1024px) rather than leaving the sequence implicit in code comments.

Expand the one-line intro into a two- or three-line overview that orients the reader to the section structure before the code reference begins.

DimensionReasoningScore

Conciseness

The body is lean and code-first: sections contain executable CSS with only functional comments (e.g., "/* Mobile: single column */") and no explanation of concepts Claude already knows, so every token earns its place per the top anchor.

5 / 5

Actionability

Every section provides copy-paste-ready, complete CSS covering the common responsive cases — container widths, grid column counts per breakpoint, clamp() typography, image aspect ratios, and nav direction switching — matching the fully-executable top anchor.

5 / 5

Workflow Clarity

This is a pattern reference rather than a multi-step process, and no destructive or batch operations exist to require validation checkpoints. The mobile-first progression (base → min-width: 640px → 1024px) is illustrated consistently in each example, but the ordering is only implied by the code comments and one best-practices bullet rather than stated as an explicit workflow, fitting the clear-with-minor-gaps anchor instead of the explicit-checkpoints one.

4 / 5

Progressive Disclosure

The body is well-organized into self-contained sections with external MDN links cleanly placed at the end, and all content is appropriately inline for a skill of this size with no bundle files needed. It sits above the good-structure anchor rather than the top one only because it exceeds the simple under-50-line case and offers just a one-line overview before diving into reference material.

4 / 5

Total

18

/

20

Passed

Description

83%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong description in third person with an explicit 'Use when...' clause and concrete technology triggers. Its main weakness is keyword coverage: the natural term "responsive" (and synonyms like breakpoints) never appears, and the capability list is technique-heavy rather than action-rich.

Suggestions

Include the word "responsive" (and close variants like "responsive layout" or "breakpoints") in the description and trigger clause — it is the phrase users most naturally say when they need this skill.

Replace or supplement the single generic action "Builds adaptive web interfaces" with more concrete actions (e.g., "builds fluid grids, responsive navigation, and adaptive typography") to strengthen capability specificity.

DimensionReasoningScore

Specificity

Names concrete techniques ("using Flexbox, CSS Grid, and media queries with a mobile-first approach") but the action coverage is thin — a single generic action ("Builds adaptive web interfaces") plus a technology list, which matches the anchor for several specific items with minor gaps rather than comprehensive action coverage.

4 / 5

Completeness

Explicitly answers both: what ("Builds adaptive web interfaces using Flexbox, CSS Grid, and media queries with a mobile-first approach") and when ("Use when creating multi-device layouts, implementing flexible UI systems, or ensuring cross-browser compatibility") with concrete trigger phrases, matching the top anchor exactly.

5 / 5

Trigger Term Quality

Good natural keyword coverage ("multi-device layouts", "implementing flexible UI systems", "ensuring cross-browser compatibility", "Flexbox", "CSS Grid"), but it omits the phrase users would most naturally say — "responsive" — and common synonyms like "breakpoints" or "mobile layout", so it falls short of the comprehensive-with-synonyms anchor.

4 / 5

Distinctiveness Conflict Risk

Triggers are distinct and technique-anchored (Flexbox, Grid, media queries), giving it a clear niche, but the broad framing around "web interfaces" and "UI systems" leaves minor overlap risk with general CSS or frontend-styling skills, fitting the mostly-distinct anchor rather than the minimal-conflict one.

4 / 5

Total

17

/

20

Passed

Validation

100%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository

secondsky/claude-skills

Path

plugins/responsive-web-design/skills/responsive-web-design/SKILL.md

Reviewed

Table of Contents

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