home/categories/debugging/antoineschaller-cortex-skills-templates-skills-web-performance-metrics-skill-md
debuggingtools

web-performance-metrics

Analyze, track, and optimize web app performance metrics including INP optimization (< 200ms target), Core Web Vitals, bundle size, runtime performance, and network metrics. Use when measuring performance, debugging slowdowns, optimizing bundles, preventing regressions, or setting performance budgets. Includes INP, LCP, CLS, Islands architecture, Scheduler API, and touch target optimization.

antoineschaller
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antoineschaller
Updated 1/19/2026
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quick start

Installation and usage

Analyze, track, and optimize web app performance metrics including INP optimization (< 200ms target), Core Web Vitals, bundle size, runtime performance, and network metrics. Use when measuring performance, debugging slowdowns, optimizing bundles, preventing regressions, or setting performance budgets. Includes INP, LCP, CLS, Islands architecture, Scheduler API, and touch target optimization.

Installation
$ install --globalskills.sh
Usage

Once installed, you can use this skill by running the following command in your terminal:

skills use web-performance-metrics