debug-optimize-lcp: Chrome DevTools Agent Skill

What the skill teaches

An official Chrome DevTools for agents skill about Largest Contentful Paint, the Core Web Vital that times how soon a page's main content shows. It gives the agent the score thresholds, splits LCP into its four sequential subparts with a target share for each, and uses the Chrome DevTools MCP performance tools to find which subpart is slow on a given page. Reference files cover how the LCP element is chosen, the subpart breakdown, measuring snippets, and fixes for each kind of delay. It is meant for questions about slow page loads, hero images or Core Web Vitals.

Capabilities

Measure LCP with a performance trace
Break LCP into its subparts to find the slow one
Suggest fixes for slow-loading main content

Install

Follow the project's install instructions

From the project's documentation

Details

Fact	Value	Source
Type	Skill
Tool	Chrome DevTools
Publisher	ChromeDevTools	source
Official status	Officialshipped in the official ChromeDevTools repository that Chrome's docs link to	source
Needs an API key or sign-in	Not stated in its documentation
Includes scripts	No	source
Platforms	Not stated in its documentation
AI clients	Not stated in its documentation
Licence	Apache-2.0	source
Pricing	Not stated in its documentation
Activity	No commit dataDownload data not available (not on npm or PyPI)
Links	Repository

More from ChromeDevTools

1 server · 8 skills

All 9 from ChromeDevTools →

Sources

Skill file (SKILL.md)github.com/ChromeDevTools/chrome-devtools-mcpNov 12, 2026
GitHub repositorygithub.com/ChromeDevTools/chrome-devtools-mcp · Backs: PublisherNov 12, 2026
Licence file (LICENSE)github.com/ChromeDevTools/chrome-devtools-mcp · Backs: LicenceNov 12, 2026
Web pagedeveloper.chrome.com · Backs: Official statusNov 12, 2026
Folder in the repository (debug-optimize-lcp)github.com/ChromeDevTools/chrome-devtools-mcp · Backs: Includes scriptsNov 12, 2026

How we check listings