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Designs layout systems and responsive interfaces including grid systems, flexbox patterns, sidebar layouts, and responsive breakpoints.
Passed 15 of 21 test cases with the skill, and 10 of 21 without it.
and 5 more in the full report
6 fixed10 passed either way6 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 6 test cases the skill fixed. Same model, same prompt, with and without the skill.
We need to run our automated command line script to generate mobile-first CSS breakpoint definitions for our design system setup. What exact CLI command should be executed?
| Checked | Without skill | With skill |
|---|---|---|
| Specifies node scripts/generate_breakpoints.js --approach mobile-first | Missed | Passed |
The instructions your model reads when the skill loads.
This skill provides comprehensive guidance for creating responsive layout systems using modern CSS techniques. It covers grid systems, flexbox patterns, container queries, spacing systems, and mobile-first design strategies to build flexible, accessible interfaces that adapt seamlessly across devices.
Invoke this skill when:
For structured, two-dimensional layouts, use CSS Grid with design tokens.
12-Column Grid:
.grid-container {
display: grid;
grid-template-columns: repeat(12, 1fr);
gap: var(--grid-gap);
max-width: var(--container-max-width);
margin: 0 auto;
padding: 0 var(--container-padding-x);
}
.col-span-6 { grid-column: span 6; }
.col-span-4 { grid-column: span 4; }
.col-span-3 { grid-column: span 3; }
test cases passed, vs 10 / 21 without
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