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Technical

How to watch for Core Web Vitals regressions

cwv-regression-watch a saved expert workflow your assistant follows, in Claude, ChatGPT or Cursor

Watch Core Web Vitals for regressions: what got slower period-over-period, which pages are weakest, mobile vs desktop split, plus the honest "does page speed correlate with clicks HERE" read.

Try it

any CWV regressions

Private beta Part of the quattr-ai-search plugin, rolling out org by org. Request access ↗

Say any of these

  • CWV regressions
  • did vitals get worse
  • core web vitals watch
  • page speed regressions
  • LCP got slower?
  • vitals trend this month
  • is site speed hurting us

You never name the skill or a tool, the assistant routes on what you asked. These are the phrasings it recognises for this one.

And when it stays out of the way

Not for the full technical sweep (technical-health-audit), or for "why did clicks drop" (anomaly-investigator, which includes a vitals step).

Use it instead of technical-health-audit when vitals are the whole subject; use technical-health-audit instead for the all-systems audit.

What it runs

  • site_health_cwv_check
  • correlate_domains

2 governed analyses, composed and scoped for you. Named here for transparency, not because you have to ask for them.

The numbers behind it

Metrics it reads, each defined in the reference

Cumulative Layout ShiftInteraction to Next PaintLargest Contentful PaintOverall page-experience verdictPerformance scoreVital gradeVital grade distributionWeakest vital

Reports these numbers feed

Core Web Vitals report

What it refuses to do

  • Vitals values and grades come from the tool; no invented thresholds, and your measurement cadence is always stated.
  • The correlation read never graduates to "speed cost us X clicks", that claim needs the controlled test.

What the answer looks like

Skill: Core Web Vitals regressions, watched. Simulated · illustrative

Did vitals get worse?

Analysis plan, every step, resolved for you

  • Routed to the governed workflowcwv-regression-watch
  • Dates bound explicitlyJul 1 to Jul 31, 2026
  • 3 analyses queued in parallelsite_health_cwv_check · correlate_domains · get_data_freshness
  • Honesty gates armedscope echo · freshness

Mobile LCP regressed 0.4s on the month; desktop held, 11 pages slipped out of 'good'.

LCP (mobile)
3.1s ▲ +0.4s slower desktop holds at 2.2s
Pages now needs-improvement
11 were 'good' in June, all on the Comparison-page template
Speed↔clicks read
no significant link here r = −0.21, p = 0.34 on this site, an honest null

Jul 1 to Jul 31, 2026 vs Jun 2026

⚠ Observationalas of Aug 1, 2026 (CWV refresh cadence varies by page set)IllustrativeOpen in Quattr ↗

Fix the Comparison-page template regression, and don't promise a traffic lift from it.

A simulated conversation on fictional data. Scope, freshness and the ⚠ Observational marker are attached by the same director that renders every demo here, not written by hand.

See this Skill inside a real analysis

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A recorded run where this Skill does the work, the prompts as typed, and the decision that came back.

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