Measures and optimizes web performance metrics to improve user experience and search engine rankings.
The Core Web Vitals skill empowers Claude to analyze, track, and optimize the essential metrics Google uses to assess user experience: Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS). By providing actionable attribution data and production-ready implementation patterns, this skill helps developers identify specific bottlenecks—such as unoptimized hero images or long JavaScript tasks—and implement robust, route-based tracking to ensure high-performance web applications.
Key Features
01Route-based performance monitoring and aggregation
02Production-ready implementation templates for modern frameworks
03Detection and resolution of common performance anti-patterns
04Actionable attribution tracking for specific element debugging
050 GitHub stars
06Comprehensive measurement of LCP, INP, and CLS metrics
Use Cases
01Implementing site-wide performance monitoring and alerting systems
02Optimizing web applications for Google's search ranking signals
03Debugging slow page loads and unexpected visual layout shifts
