Minimize cumulative layout shift
SkillMediaLets your agent audit page speed issues caused by layout shifts and verify bottlenecks with DevTools or Lighthouse.
Available today. Use it from your connected AI after setup.
No other account needed.
Connect ahel once, and every AI you use reads what you have installed.
Then ask your AI: use the Minimize cumulative layout shift skill
About this capability
Use when auditing slow page loads, heavy assets, or rendering delays related to Minimize cumulative layout shift. Verify the actual bottleneck in DevTools, Lighthouse, or field data before recommending changes.
What this skill tells your AI
The instructions your AI receives, as published by thedaviddias/front-end-checklist in skills/cumulative-layout-shift/SKILL.md and read by ahel’s review.
Layout shifts cause accidental clicks, reading disruption, and user frustration—a good CLS score ensures content stays where users expect it.
Quick Reference
- CLS measures visual stability—target score below 0.1
- Always set width/height on images and embeds
- Reserve space for ads, banners, and dynamic content
- Use transform animations instead of layout-changing properties
Check
Measure CLS using Lighthouse or PageSpeed Insights. Verify score is below 0.1 for good visual stability.
Fix
Reserve space for images/embeds with dimensions, use font-display strategies, and avoid injecting content above existing content.
Explain
Explain how CLS measures visual stability and why unexpected layout shifts frustrate users and cause accidental clicks.
Code Review
Review the routes, assets, and loading behavior that affect Minimize cumulative layout shift. Flag exact files, requests, or rendering steps that add unnecessary network, CPU, or layout cost, and describe the measurement method used to confirm the issue.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/en/rules/performance/cumulative-layout-shift
Signals
- GitHub stars
- 74k
- Forks
- 7k
- Last commit
- Aug 2026
Advanced
- Catalog kind
- skill
- Gateway key
cumulative-layout-shift- Source
- github.com/thedaviddias/front-end-checklist