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Web Vitals Monitor

Listed
jeremylongshore·vlatest·frontend·MIT

Helps with web development, monitoring as part of agent workflows workflows.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add jeremylongshore/tons-of-skills-marketplace --skill web-vitals-monitor -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

jeremylongshore

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

Nobody has reviewed this code. TrustedSkills indexes and links skills; it does not audit, run or scan them. A skill runs with whatever access you give your agent — read the source before you install it.

Automated safety checks

scanned

We could not read this skill's source, so none of the checks below were run.

Not scanned. none of the 396 skills in the repository match this slug — it was most likely renamed or removed upstream after the registry indexed it Source recorded as jeremylongshore/claude-code-plugins-plus-skills.
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
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About this skill

What it does

The web-vitals-monitor skill allows AI agents to track and report on Core Web Vitals for a given URL. It measures metrics like Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS) to assess the user experience of web pages. This data can be used to identify performance bottlenecks and areas for optimization.

When to use it

  • Performance Audits: Regularly check a website's Core Web Vitals scores to monitor its health over time.
  • Troubleshooting Slow Pages: Investigate why specific pages are loading slowly or exhibiting layout instability.
  • A/B Testing Analysis: Evaluate the impact of design changes on page performance by comparing Web Vital metrics before and after implementation.
  • Competitive Benchmarking: Compare your website's Core Web Vitals against competitors to identify areas for improvement.

Key capabilities

  • Measures Largest Contentful Paint (LCP)
  • Measures First Input Delay (FID)
  • Measures Cumulative Layout Shift (CLS)
  • Reports performance metrics for a given URL

Example prompts

  • "Monitor the Core Web Vitals of https://www.example.com."
  • "What is the LCP score for https://www.mywebsite.com/blog?"
  • "Give me the FID and CLS values for this page: https://store.company.net/product/123."

Tips & gotchas

The accuracy of the results depends on a stable internet connection and proper rendering of the target webpage. Ensure the URL provided is accessible and fully loaded before requesting metrics.