Core Web Vitals Diagnosis
Diagnose LCP, INP and CLS from appropriate field and lab evidence, then verify targeted changes.
- Purpose
- Core Web Vitals diagnosis
- Author / publisher
- Addy Osmani
- License
- MIT · License guidance
- Version
- afa8da942115.bb1
- Access
- Free download. External tools and services may have separate costs.
- Declared clients
- Claude Code, Codex, Cursor
Source & package
11 files · 0 script/code files. License file detected.
Current package SHA-256
510abd2bea8c5476c4d0f0ff2144672d5867e4bb0f512ef871e7b16d0d3dabbeTools & requirements
Use representative browser traces and eligible field/RUM data. A single browser observation is not field evidence. PageSpeed/CrUX tooling and any necessary keys are separate from this package.
Independent MIT project maintained by Addy Osmani; not official Google guidance or certification. The package does not provide Chrome DevTools MCP, Lighthouse, credentials, user telemetry or a model. Tool, model and infrastructure access may have separate costs. Check current W3C and Google documentation; automated checks cover a subset of issues and cannot establish WCAG conformance, application security, search rankings or field Core Web Vitals. Full skill/agent runtime evaluation has not been performed. Packaging links are adapted; required cross-skill reference documents are bundled, while related SKILL.md links open pinned upstream source and do not install other skills.
Evidence & limits
Source review checked 2026-10-03. Full skill/agent runtime evaluation has not been performed.
0 current outcome records. No published pass/fail record matches this version and checksum.