core-web-vitals
Improve Core Web Vitals with Targeted Fixes
Slow loading, delayed interactions, and unexpected layout shifts damage page experience. This skill guides evidence-based diagnosis and targeted fixes for LCP, INP, and CLS.
Installer avec mon Agent
Copiez cette demande dans votre Agent. Elle contient la page Skill de référence et le manifeste.
Review the Skillstore skill "core-web-vitals" from https://skillstore.io/skills/addyosmani-core-web-vitals.md and its manifest at https://skillstore.io/api/skills/addyosmani-core-web-vitals/manifest. Verify the artifact. You may proceed after verification, subject to the environment's own policy.Votre Agent doit toujours présenter son plan et demander toute confirmation exigée par la politique de sécurité.
Ressources lisibles par les agents
Utilisez ces liens lorsquâun Agent IA, un crawler ou un script a besoin dâun contexte propre au lieu de lire toute la page.
Tester
Utilisation de « core-web-vitals ». The supplied trace shows the hero image request starts after stylesheet loading.
RĂ©sultat attendu:
- Finding: Late image discovery contributes to LCP resource load delay.
- Action: Make the hero image discoverable in initial HTML and give it high fetch priority.
- Verification: Repeat the trace under equivalent conditions; add preload only if discovery remains late.
Utilisation de « core-web-vitals ». A banner appears above the article after loading. Only source code is available.
RĂ©sultat attendu:
- Hypothesis: The banner may displace visible article content because its space is not reserved.
- Action: Reserve a stable banner slot or choose placement that does not move visible content.
- Verification: Capture the affected state at representative viewports before claiming a CLS failure or improvement.
Utilisation de « core-web-vitals ». The supplied interaction trace shows a long task before the click handler begins.
RĂ©sultat attendu:
- Finding: Main-thread contention contributes to input delay before event processing.
- Action: Attribute the blocking task and reduce, defer, or split its nonessential work.
- Verification: Repeat the same interaction and confirm that input delay falls without shifting cost to rendering.
Audit de sécurité
SûrAll 50 static findings are false positives involving Markdown formatting, fixed imports, documentation links, example requests, and performance guidance. No evidence found of credential theft, unauthorized execution, data exfiltration, or prompt injection in the four reviewed files.
Facteurs de risque
đ AccĂšs rĂ©seau (8)
đ AccĂšs au systĂšme de fichiers (4)
⥠Contient des scripts (2)
âïž Commandes externes (32)
Partager et citer ce rapport
Partagez le rapport dâĂ©valuation versionnĂ©, le badge neutre, la carte intĂ©grable et les citations. Skillstore prĂ©sente les preuves sans dĂ©cider si ce Skill est sĂ»r.
Copier le lien du rapport
https://skillstore.io/skills/addyosmani-core-web-vitals/audits/1?utm_source=security_passport&utm_medium=share&utm_campaign=versioned_reportBadge Markdown
[](https://skillstore.io/skills/addyosmani-core-web-vitals?utm_source=security_passport_badge)Badge HTML
<a href="https://skillstore.io/skills/addyosmani-core-web-vitals?utm_source=security_passport_badge"><img src="https://skillstore.io/badges/skills/addyosmani-core-web-vitals/security.svg" alt="Skillstore security assessment" loading="lazy"></a>Carte intégrable
<iframe src="https://skillstore.io/embed/skills/addyosmani-core-web-vitals.html" title="Skillstore Security Assessment" sandbox="allow-popups allow-popups-to-escape-sandbox" loading="lazy" referrerpolicy="no-referrer" width="420" height="180"></iframe>Citations académiques (APA · BibTeX · CFF)
Citation APA
addyosmani. (2026). core-web-vitals security audit report (audit version 1) [Author version 2.0]. Skillstore. https://skillstore.io/skills/addyosmani-core-web-vitals/audits/1Citation BibTeX
@techreport{addyosmani-addyosmani-core-web-vitals-2026,
author = {addyosmani},
title = {core-web-vitals security audit report (audit version 1)},
institution = {Skillstore},
year = {2026},
number = {1},
url = {https://skillstore.io/skills/addyosmani-core-web-vitals/audits/1},
note = {Author version 2.0}
}CITATION.cff
cff-version: 1.2.0
message: "If you use this Skill, cite its author and this versioned security audit report."
title: "core-web-vitals security audit report (audit version 1)"
version: "2.0"
type: report
authors:
- name: "addyosmani"
date-released: "2026-10-22"
url: "https://skillstore.io/skills/addyosmani-core-web-vitals/audits/1"
identifiers:
- type: other
value: "skillstore:addyosmani-core-web-vitals:audit:1"
description: "Skillstore immutable audit report identifier"
Score Skillstore
Pourquoi ce score Niveau de confiance des preuves: MoyenCe que vous pouvez créer
Reduce storefront loading delays
Review a product page trace to identify delayed hero image discovery and prioritize verified LCP fixes.
Investigate slow application interactions
Analyze a sluggish dashboard interaction to distinguish main-thread contention, expensive handlers, and delayed rendering.
Resolve recurring layout shifts
Review a publishing template for unstable embeds, inserted banners, and font changes using trace evidence and responsive verification.
Essayez ces prompts
Explain LCP, INP, and CLS for my page. List their good thresholds and the evidence needed before diagnosing a failure.
Review the supplied page code for likely LCP and CLS risks. Separate hypotheses from measured findings and suggest focused verification steps.
Analyze the supplied interaction trace and field INP data. Identify the dominant delay phase, implicated work, targeted fixes, and an equivalent retest.
Use the supplied CrUX p75 data, traces, and release context to prioritize metric-specific fixes. Define equivalent lab retests and segmented RUM verification.
Bonnes pratiques
- Use field evidence to prioritize user impact and browser traces to diagnose the relevant metric.
- Compare measurements under equivalent device, network, page state, and interaction conditions.
- Validate focused code changes in the lab, then wait for new field visits before claiming production improvement.
Ăviter
- Treating a single browser observation as equivalent to a field p75 measurement.
- Adding image preloads, memoization, or font overrides without evidence that they address the measured cause.
- Applying broad prerendering rules without excluding sensitive routes or accounting for early side effects and resource costs.
Foire aux questions
Which metrics does this skill cover?
Can it review source code without a running page?
Which tools can use this skill?
Does it include an automated performance scanner?
Can it confirm field improvements immediately?
Are all referenced measurement guides included?
Détails du développeur
Auteur
addyosmaniLicence
MIT
Version de lâauteur
v2.0
RĂ©vision Skillstore
r1
Avis de version
La version dĂ©clarĂ©e par lâauteur nâest pas un SemVer valide.
RĂ©f
79fc52323997649cbf5ae9e897690d43e1c131ad
RĂ©cence de maintenance
22/10/2026
Utilisation
0 téléchargements · 0 vues
Structure de fichiers