A skill for Claude Code and Codex · Design and frontend
page-speed-expert is the skill that has your AI diagnose and fix site speed the way a visitor actually experiences it: LCP, INP and CLS on mobile, with an empty cache and mid-range 4G, which is exactly the cold paid traffic scenario. It measures first, fixes in the order that pays off most, and measures again, across HTML, PHP, CSS and JS, framework or not.
Solo skill: unlocks right away, no guarantee after download. Purchase terms.
Or get all 25 skills plus 9 bonuses in the Supreme Pack for R$ 497.
The problem
On cold traffic, nobody has a cache, nobody has patience, and the back button is one tap away. AI tends to optimize for the score, not the conversion. Three symptoms, and what changes with the skill.
| Without the skill | With page-speed-expert |
|---|---|
| The AI tells you to convert everything to WebP and minify CSS, the score goes up two points, and the page is still slow, because the real problem was a third party script freezing the browser. | It fixes things in the order that pays off most: third parties first, then the LCP resource, then render blocking, then layout shift, and only then server and cache. |
| The hero image has lazy load, loads through CSS, or depends on JavaScript, so the browser only discovers it needs it once it's already too late. | The LCP resource sits right in the HTML, no lazy load, high priority, modern format and the right size for the screen, discoverable before any script runs. |
| They measured once on a desktop, changed five things at once, and nobody knows what helped or whether real users felt any difference. | It measures on mobile, on the ad's exact URL, breaks LCP into its four parts, and compares before and after in the same scenario, with field data when it exists. |
What you get out of it
A diagnosis with a root cause, the fix applied to the page, and a before and after measured in the same scenario.
which part of LCP blew up, what's blocking rendering, and what each third party costs you
third parties, hero image, critical CSS, stable layout, server and cache
cache and compression headers for Apache and Nginx, plus a reference head section
lab and field data side by side, on the same simulated network and device
How it works
Mobile first, on the exact URL the ad uses, with lab data and real user field data whenever the page has enough traffic for it.
LCP splits into four parts: server, delay before the download starts, download, and render. It finds the part that blew the budget and attacks that one.
Third party script deferred, LCP resource prioritized in the HTML, critical CSS inlined, and JavaScript deferred, in that order.
Declared dimensions on every media element, fonts that don't flash, cache, compression and CDN, plus instant next page navigation when it makes sense.
Same scenario, same URL, before and after side by side, knowing that working conversion and tracking matter more than a perfect score.
Before you buy
Without the key, diagnosis still runs through Chrome's own Lighthouse, just without automated scripted measurement.
Its limits
The focus is speed and rendering stability. Keywords, content and getting cited by AI belong to seo-expert, and page copy to copy-thief, which is free on my GitHub.
On shared hosting, the server has a ceiling, and part of response time can't be fixed with code. When that's the case, it shows you exactly where the limit is and what changes with a cache layer in front or a different plan.
The lab score isn't the goal: a page scoring 85 with fast real world loading outsells one with a perfect 100 and broken tracking, and it prioritizes in that order.
What you receive
The price
Just page-speed-expert
R$57one time payment
Bought it solo and now want it all? Message me on WhatsApp and I will deduct what you already paid.
Supreme Pack
R$ 1.665R$497or 10x on a card
Buying all 25 solo adds up to R$ 1.665. The pack pays for itself by the ninth skill. See everything the Supreme Pack includes
02 · Design and frontend
Before you ask
LCP, INP and CLS, focused on mobile and cold traffic: third party scripts, hero image, render blocking, layout shift, fonts, JavaScript, server, cache and CDN, in the order that improves the real experience the most.
It works on PHP, HTML, CSS and JS sites, framework or not. On WordPress it works with what the browser receives and with the server, and flags when the weight comes from a plugin or theme.
No. Measurement uses the PageSpeed Insights API, which is free, plus Chrome's own Lighthouse.
They're usually the biggest weight on a landing page, and it's the first place it looks. The skill shows how much each third party blocks and how to defer it without losing conversion measurement.
Yes, the license covers your work for third parties. What's off limits is reselling or redistributing the skill.
One-time payment, 12 months of updates. No refunds after download; the Supreme Pack comes with a 7-day guarantee.
