Skill rating

Use when reviewing rendered HTML, interactive components, or design-system patterns related to Provide titles for iframes and frames. Check native semantics first, then inspect keyboard behavior, focu

Use when auditing slow page loads, heavy assets, or rendering delays related to Optimize Google Tag Manager implementation. Verify the actual bottleneck in DevTools, Lighthouse, or field data before r

Use when reviewing templates, rendered HTML, or shared components related to Use semantic input type attributes. Validate the final browser-facing markup, not just the source framework abstraction.

Use when reviewing scripts, client components, bundles, or runtime behavior related to Parse JSON safely with error handling. Inspect both source code and the browser execution path so fixes target th

Use when reviewing mobile-first layouts, tablet experiences, fullscreen flows, forms, dashboards, or media interfaces. Check rendered behavior in both portrait and landscape and separate genuine layou

Use when auditing slow page loads, heavy assets, or rendering delays related to Keep page weight under 1500KB. Verify the actual bottleneck in DevTools, Lighthouse, or field data before recommending c

Use when applies to all HTML pages. Use when auditing pages that have disappeared from search results or when checking staging vs. production meta tag parity.

Use when reviewing rendered HTML, interactive components, or design-system patterns related to Provide accessible names for select elements. Check native semantics first, then inspect keyboard behavio

Use when applies to any site with a dynamically generated or manually maintained XML sitemap. Use when investigating crawl errors or after a site migration that removed pages.

Use when auditing slow page loads, heavy assets, or rendering delays related to Provide source maps for production debugging. Verify the actual bottleneck in DevTools, Lighthouse, or field data before

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

Use when reviewing scripts, client components, bundles, or runtime behavior related to Use Web Storage API safely. Inspect both source code and the browser execution path so fixes target the real bott

Use when reviewing image assets, markup, and CDN or build transforms related to Use WebP format with fallbacks. Check encoded size, rendered size, loading strategy, and above-the-fold impact together.

Use when reviewing templates, rendered HTML, or shared components related to Analyze performance with WebPageTest. Validate the final browser-facing markup, not just the source framework abstraction.

Use when reviewing rendered HTML, interactive components, or design-system patterns related to Support content reflow at 400% zoom. Check native semantics first, then inspect keyboard behavior, focus

Use when auditing metadata, crawlability, structured data, or indexability related to Create a dedicated About page. Verify the rendered HTML and HTTP response rather than relying only on source files

Use when reviewing rendered HTML, interactive components, or design-system patterns related to Ensure accesskey values are unique. Check native semantics first, then inspect keyboard behavior, focus f

Use when auditing metadata, crawlability, structured data, or indexability related to Audit and refine AI-generated content. Verify the rendered HTML and HTTP response rather than relying only on sour

Use when reviewing rendered HTML, interactive components, or design-system patterns related to Use valid ARIA role values. Check native semantics first, then inspect keyboard behavior, focus flow, acc

Use when auditing metadata, crawlability, structured data, or indexability related to Implement valid BreadcrumbList schema. Verify the rendered HTML and HTTP response rather than relying only on sour

Use when reviewing image assets, markup, and CDN or build transforms related to Set explicit width and height on images. Check encoded size, rendered size, loading strategy, and above-the-fold impact

Use when reviewing scripts, client components, bundles, or runtime behavior related to Use ES modules (import/export). Inspect both source code and the browser execution path so fixes target the real

Use when reviewing HTML forms, fetch/XHR calls, and form action attributes to ensure data is submitted exclusively over HTTPS.

Use when auditing page metadata or generating SEO-optimized titles. Applies to every HTML page that should appear in search results.

Use when reviewing rendered HTML, interactive components, or design-system patterns related to Provide alternative text for objects. Check native semantics first, then inspect keyboard behavior, focus

Use when auditing URL structure or configuring search engine handling of filtered, sorted, or tracked URLs. Applies to e-commerce sites, filtered content directories, and any site appending tracking o

Use when auditing slow page loads, heavy assets, or rendering delays related to Use preconnect for critical third-party origins. Verify the actual bottleneck in DevTools, Lighthouse, or field data bef

Use when applies primarily when creating new content pages. Low priority for existing indexed pages where redirect risk outweighs gain. Use when building a slug naming convention.

Use when reviewing image assets, markup, and CDN or build transforms related to Manage inline SVG size and complexity. Check encoded size, rendered size, loading strategy, and above-the-fold impact to

Use when applies to contact pages, business listing pages, headers/footers, and any page displaying a phone number or email address. Use when auditing contact UX or schema-marked LocalBusiness pages.

Use when reviewing CI coverage, automated checks, or test strategy related to Write unit tests. Focus on whether the rule is continuously verified, not just documented.

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

Use when applies to key landing pages, blog posts, product pages, and any page targeting competitive queries. Use when diagnosing poor rankings or after a Google Helpful Content update.

Use when reviewing rendered HTML, interactive components, or design-system patterns related to Avoid focusable descendants in role='text' elements. Check native semantics first, then inspect keyboard

Use when auditing metadata, crawlability, structured data, or indexability related to Cite authoritative external sources. Verify the rendered HTML and HTTP response rather than relying only on source

Use when reviewing scripts, client components, bundles, or runtime behavior related to Prefer const and let over var. Inspect both source code and the browser execution path so fixes target the real b

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 f

Use when reviewing stylesheets, component styles, and responsive behavior related to Include a print stylesheet. Check the rendered layout across breakpoints and interaction states before proposing a

Use when applies to all CSS `font-size` declarations, particularly those using `px` units for body text, UI labels, and navigation. Use when auditing mobile responsiveness and accessibility compliance

Use when auditing page weight for crawl efficiency, investigating why certain page content is not appearing in Google's index, or reviewing server-rendered pages that embed large JSON payloads in HTML

Use when reviewing image assets, markup, and CDN or build transforms related to Serve images from a CDN. Check encoded size, rendered size, loading strategy, and above-the-fold impact together.

Use when auditing slow page loads, heavy assets, or rendering delays related to Avoid serving legacy JavaScript to modern browsers. Verify the actual bottleneck in DevTools, Lighthouse, or field data

Use when reviewing rendered HTML, interactive components, or design-system patterns related to Use descriptive link text. Check native semantics first, then inspect keyboard behavior, focus flow, acce

Use when auditing URL structure or configuring a new site's routing. Applies to any server or framework that allows case-insensitive file systems (Linux servers are case-sensitive by default).

Use when auditing server configuration or diagnosing broken resources. Applies to any web server serving HTML, CSS, JS, images, fonts, or other static assets.

Use when auditing robots meta tags. Applies to any important landing page, article, or product page that should appear with a description in search results.

Use when reviewing image assets, markup, and CDN or build transforms related to Optimise images for faster loading. Check encoded size, rendered size, loading strategy, and above-the-fold impact toget

Use when reviewing stylesheets, component styles, and responsive behavior related to Use a CSS reset or normalize stylesheet. Check the rendered layout across breakpoints and interaction states before

Use when reviewing rendered HTML, interactive components, or design-system patterns related to Implement 'Skip to Content' links. Check native semantics first, then inspect keyboard behavior, focus fl

Use when reviewing templates, rendered HTML, or shared components related to Ensure all IDs are unique. Validate the final browser-facing markup, not just the source framework abstraction.