core-web-vitals
addyosmaniFaster pages with evidence.
web performance
What it does
Optimizes Core Web Vitals by using field data and browser traces to identify user impact and diagnose causes.
When to use it
Use it for requests to improve Core Web Vitals, fix LCP, reduce CLS, optimize INP, improve page experience, or fix layout shifts.
How to use it
Give it a runnable URL or source code and the Core Web Vitals issue; it diagnoses the relevant evidence, applies targeted fixes, and re-runs equivalent lab measurements when possible.
What you provide
- a runnable URL
- the Core Web Vitals issue
Uses
CR
Access · 4
This skill
the runnable URL
Read
Reads the runnable URL
CrUX
Read
Reads CrUX data
browser performance traces
Read
Records performance traces
first-party RUM
Read
Reads first-party RUM
What you need · 0
No setup requirements listed in the analysis.
About this skill
- Visibility
- Public
- Repository
- addyosmani/web-quality-skills
- Created
- Oct 8, 2026
- Updated
- Oct 8, 2026
- Files
- 4