Core Web Vitals

Measure, diagnose and optimize Core Web Vitals (LCP, INP, CLS) for web applications using…

A complete audit and optimization workflow for Core Web Vitals: LCP, INP, and CLS: that measures real performance, diagnoses the bottlenecks, and produces a prioritized fix list. It combines lab data from PageSpeed Insights and Lighthouse with field data from the Chrome User Experience Report, so decisions are based on what real users actually experience. The output is a JSON health score plus an opportunity-ranked action plan.

$15 one-time
Add to a kit →

Prices include 20% VAT. · Forged on real agency work · one-time, no lock-in

  • Type Skill
  • Category Search & AEO
  • Delivery Email · instant
  • License One-time
Run preview
forgehouse, core-web-vitals

Inside the run · no black box

See the actual work before you buy it.

Lab numbers flatter, field data ranks. The loop pulls both from PageSpeed and CrUX, lets real-user P75 values win every disagreement, and ranks fixes by estimated millisecond savings across every template type.

  1. Calls the PageSpeed Insights API for mobile and desktop and pulls the lab LCP, INP and CLS values plus the Lighthouse performance score.
  2. Queries CrUX for the field data, the real-user P75 values Google actually ranks on, and resolves any lab-versus-field disagreement in favor of field data.
  3. Extracts the failing audits and ranks the fix opportunities by estimated millisecond savings, so the top 5 fixes are chosen by impact, not by guesswork.
  4. Diagnoses each metric at its source: render-blocking resources and hero image priority for LCP, long JavaScript tasks and third-party scripts for INP, unsized images and font swaps for CLS.
  5. Repeats the measurement across template types (homepage, listing, detail, blog), because a fast homepage routinely hides a slow product template.
  6. Issues a PASS, NEEDS_REVIEW or FAIL verdict against the official thresholds (LCP 2.5s, INP 200ms, CLS 0.1) and re-measures after fixes against the saved baseline so improvement is proven, not claimed.
Use cases · what happens when you plug it in

One power source. 6 lines out.

core-web-vitals · core

core active · 6 lines

  1. Capturing a performance baseline before a new site or page goes live

    ✓ capturing a performance
  2. Fixing URLs flagged in the Search Console Core Web Vitals report

    ✓ fixing urls flagged in the
  3. Diagnosing slow LCP, sluggish INP, or unexpected layout shift

    ✓ diagnosing slow lcp, slu…
  4. Running a pre-deploy regression check on page speed

    ✓ running a pre-deploy reg…
  5. Resolving a lab-passes-but-field-fails discrepancy using real-user data

    ✓ resolving a lab-passes-b…
  6. Auditing multiple template types: homepage, listing, detail, blog, search

    ✓ auditing multiple template
Benefits · what you walk away with

Yours to keep.

Drag time forward. Watch what stays.

Forever

That's what owning means.

The rented stack

ai writing tool: subscription

expired · access lost

analytics suite: subscription

expired · access lost

design platform: subscription

expired · access lost

(nothing left)

Your forge

  1. Pages hit the Good thresholds that influence Google ranking and Page Experience

    license: perpetual
  2. Faster load and interaction reduce bounce and lift conversion

    license: perpetual
  3. Fix effort goes to the highest-impact opportunities first, not guesswork

    license: perpetual
  4. Performance is verified against real users, not just synthetic test runs

    license: perpetual

subscriptions expire · deeds don't

What's included · the full manifest

Everything in the box.

Pick a piece up. Watch it work.

PageSpeed Insights and CrUX query recipes for lab and field measurement

part 01 of 06 · in the box

6 parts · one working system · ships instantly by email

Who it's for

This wasn't forged for everyone.

  • Not for you if you'd rather rent a tool than own one.
  • Not for you if you want someone else to run your stack.
  • Not for you if you're happy guessing.
Still here? Good.

Web developers, SEO specialists, and site owners who need to measure, diagnose, and fix Core Web Vitals with real-user data backing every decision.

then this was forged for you.

Works with

Universal by design: these run in any AI. Delivered in the open Agent Skills + MCP format (native in Claude); ChatGPT, Gemini, Cursor and Copilot adapt the same files their own way.

  • Claude Native format
  • ChatGPT Adapts via open standards
  • Gemini Adapts via open standards
  • Cursor Adapts via open standards
  • Copilot Adapts via open standards
Questions · still in the air

Catch what's on your mind.

the air is clear. nothing between you and the forge.
catch a spark: the forge will answer

  1. My site is new with little traffic. Does it still work without field data?

    It can capture a lab baseline from PageSpeed and Lighthouse before launch, which is exactly the no-traffic case. Field data from CrUX joins once real users arrive to confirm what they actually experience.

  2. Is this just rerunning Lighthouse for me?

    It goes further by pairing that lab data with real-user field data, because a lab score can look fine while CrUX shows users hitting slow LCP. The output is a diagnosed bottleneck list, not a single number.

  3. Does it apply the fixes or only tell me what is wrong?

    It measures, diagnoses and hands you a prioritized fix list ordered by impact, but implementing each change in your code is your step. The skill tells you what to fix first and why, not how your stack should ship it.

  4. How is it delivered?

    By email right after purchase: ready to run, downloaded instantly, no setup wait.

  5. One-time or subscription?

    A one-time purchase; no subscription or hidden fees. VAT (20%) is included.

  6. Can I get a refund?

    As a digital product, it can’t be refunded once downloaded. That’s why we show exactly what’s inside and who it’s for, right here.