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name: cloudflare-web-perf description: | Audit Core Web Vitals and render-blocking resources. Official Cloudflare skill for identifying and fixing LCP, INP, CLS, TTFB issues with Cloudflare-specific optimization strategies. triggers:

• "web performance"
• "Core Web Vitals"
• "LCP"
• "CLS"
• "INP"
• "render blocking"
• "cloudflare performance" das: category: accessibility-quality upstream: "https://github.com/cloudflare/skills" upstream_path: "skills/web-perf/SKILL.md" version: latest install: true

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cloudflare-web-perf

Catalogue stub — full skill: cloudflare/skills

Decision tree

1. Is the full skill already installed? Check whether the skill at this location still has a das: block:

   • Global: grep -q "^das:" ~/.agents/skills/cloudflare-web-perf/SKILL.md 2>/dev/null && echo "pointer" || echo "installed"
   • Project: grep -q "^das:" .agents/skills/cloudflare-web-perf/SKILL.md 2>/dev/null && echo "pointer" || echo "installed"
   • No das: block → full skill installed, invoke it and proceed
   • das: block present → go to step 2

2. Detect scope, then install:

   To detect scope:

   [ -e ~/.agents/skills/cloudflare-web-perf ] && echo "global" || echo "project"
   

   Global (installed with -g):

   npx skills add cloudflare/skills --skill cloudflare-web-perf -g -y
   

   Project (installed without -g):

   npx skills add cloudflare/skills --skill cloudflare-web-perf -y
   

   Claude Code: send either command as a chat message starting with ! to run it without leaving the conversation.

Invoke after install

• Skill name: cloudflare-web-perf
• Trigger phrases: "web performance", "Core Web Vitals", "LCP", "CLS", "render blocking"

What it does

Official Cloudflare skill for auditing and fixing Core Web Vitals — LCP (Largest Contentful Paint), INP (Interaction to Next Paint), CLS (Cumulative Layout Shift), and TTFB. Identifies render-blocking resources, unoptimized images, and layout instability causes. Includes Cloudflare-specific fixes using Workers, Cache Rules, and Image Optimization.