Testing & Quality skills

Browse reusable Agent Skills, each with a clear purpose and practical guidance.

css-file-size

Use when auditing slow page loads, heavy assets, or rendering delays related to Optimize CSS file size. Verify the actual bottleneck in DevTools, Lighthouse, or field data before recommending changes.

73.22k repo starsObserved in 1 repos
Testing & Quality

css-minification

Use when reviewing stylesheets, component styles, and responsive behavior related to Minify all CSS files. Check the rendered layout across breakpoints and interaction states before proposing a fix.

73.22k repo starsObserved in 1 repos
Testing & Quality

css-non-blocking

Use when reviewing stylesheets, component styles, and responsive behavior related to Load CSS without blocking render. Check the rendered layout across breakpoints and interaction states before proposing a fix.

73.22k repo starsObserved in 1 repos
Testing & Quality

css-order

Use when reviewing stylesheets, component styles, and responsive behavior related to Order CSS files correctly. Check the rendered layout across breakpoints and interaction states before proposing a fix.

73.22k repo starsObserved in 1 repos
Testing & Quality

cumulative-layout-shift

Use when auditing slow page loads, heavy assets, or rendering delays related to Minimize cumulative layout shift. Verify the actual bottleneck in DevTools, Lighthouse, or field data before recommending changes.

73.22k repo starsObserved in 1 repos
Testing & Quality

currency-formatting

Use when reviewing utility functions, component props, or template strings that format numbers, prices, or dates to check whether Intl APIs are used correctly.

73.22k repo starsObserved in 1 repos
Testing & Quality

custom-element-accessibility

Use when reviewing custom element class definitions or Web Component source code to check for missing ARIA reflection, keyboard handling, and form association.

73.22k repo starsObserved in 1 repos
Testing & Quality

dark-mode-css

Use when reviewing stylesheets, component styles, and responsive behavior related to Support dark mode with prefers-color-scheme. Check the rendered layout across breakpoints and interaction states before proposing a fix.

73.22k repo starsObserved in 1 repos
Testing & Quality

dead-end-pages

Use when auditing a site's internal link graph for dead-end pages, suggesting related-content links to add to thin or standalone pages, or reviewing CMS templates that produce link-free content pages.

73.22k repo starsObserved in 1 repos
Testing & Quality

debounce-throttle

Use when reviewing scripts, client components, bundles, or runtime behavior related to Debounce and throttle event handlers. Inspect both source code and the browser execution path so fixes target the real bottleneck or bug.

73.22k repo starsObserved in 1 repos
Testing & Quality