Individual skill
performance-optimization
Diagnose and fix web performance issues including Core Web Vitals (LCP, INP, CLS), bundle size, asset optimization, render performance, and runtime efficiency. Use this skill whenever the user wants to improve page speed, fix Core Web Vitals, optimize assets, reduce bundle size, debug slow renders, or systematically improve a site's performance. Triggers on performance, page speed, Core Web Vitals, LCP, INP, CLS, FID, TTFB, bundle size, code splitting, image optimization, lazy loading, render blocking, slow page, performance audit, Lighthouse score. Also triggers when traffic or conversion is dropping due to perceived slowness.
dist/codex/.agents/skills/performance-optimization/SKILL.md
Source commit 9b90db257f7395fab76ff9bfcb808456709f6af3
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- Yes
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Network or broad shell
- Last checked
- Nov 4, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
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An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.
Repository context
- Repository stars (not skill ratings)
- 1,045
- Repository last updated
- Oct 27, 2026
- License
- MIT
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- claude Repository topic
- claude-skills Repository topic
- anthropic Repository topic
- mcp Repository topic
- seo Repository topic
- web-development Repository topic
- agent-skills Repository topic
- claude-code Repository topic
- product-management Repository topic
- web-design Repository topic
- security Derived category
Files and excerpt
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Browse files
SKILL.mdcore · 10,649 bytesSKILL.mdcore · 10,649 bytesSKILL.mdcore · 10,649 bytesreferences/_claude-frontmatter-extras.yamlasset · 398 bytesreferences/audit-template.mddoc · 5,602 bytesreferences/optimization-checklist.mddoc · 5,634 bytesreferences/optimization-playbook.mddoc · 9,303 bytes
Read excerpt
# Performance Optimization
Diagnose web performance issues and produce a remediation plan. Stack-agnostic. Anchored to Core Web Vitals and standard browser performance patterns.
This skill goes deeper than the performance checks in `qa-testing` and `seo-technical`. Use this when performance itself is the goal.
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## When to use
- Fixing Core Web Vitals (LCP, INP, CLS)
- Diagnosing slow page loads
- Reducing JavaScript bundle size
- Optimizing images, fonts, and other assets