Web analytics

Skill Mattakushi432/Claude-Code-Skills-Custom-DevTools-Pack/plugins/devtools-pack/skills/web-analytics

A curated pack of custom Claude Code skills for developers — installable as a Claude Code plugin marketplace.

Install

npx -y skills add Mattakushi432/Claude-Code-Skills-Custom-DevTools-Pack --skill web-analytics

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

One thing to look at

0 stars0 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.

What its author says it does

Copied from the file, not written here

When to activate: analytics, GA4, event tracking, custom dimensions, conversion tracking, Plausible, attribution, privacy-first

SKILL.md

4.2 KB, ~1.1k tokens by cl100k_base, as published. Nobody here has run it

Web Analytics Patterns

GA4 Event Tracking

// gtag helper wrapper
function track(eventName, params = {}) {
  if (typeof gtag === 'undefined') return;
  gtag('event', eventName, params);
}

// Page view (SPA)
track('page_view', {
  page_title: document.title,
  page_location: window.location.href,
});

// E-commerce events
track('view_item', {
  currency: 'USD',
  value: 29.99,
  items: [{ item_id: 'SKU_123', item_name: 'Product', price: 29.99, quantity: 1 }]
});

track('add_to_cart', { currency: 'USD', value: 29.99, items: [...] });

track('purchase', {
  transaction_id: 'T_12345',
  value: 59.98,
  currency: 'USD',
  items: [...]
});

Custom Dimensions & Metrics

// GA4: set user properties
gtag('set', 'user_properties', {
  subscription_tier: 'pro',
  account_age_days: 120,
});

// Custom event with custom params
track('file_download', {
  file_name: 'report.pdf',
  file_extension: 'pdf',
  link_url: '/downloads/report.pdf',
});

React Analytics Hook

import { useEffect } from 'react';
import { useLocation } from 'react-router-dom';

export function usePageTracking() {
  const location = useLocation();
  useEffect(() => {
    track('page_view', {
      page_path: location.pathname + location.search,
      page_title: document.title,
    });
  }, [location]);
}

// Track button clicks declaratively
export function TrackedButton({ eventName, eventParams, ...props }) {
  return (
    <button
      {...props}
      onClick={(e) => {
        track(eventName, eventParams);
        props.onClick?.(e);
      }}
    />
  );
}

Privacy-First Analytics (Plausible)

<!-- No cookies, GDPR compliant -->
<script defer data-domain="example.com"
  src="https://plausible.io/js/script.js"></script>

// Custom events with Plausible
window.plausible?.('Signup', { props: { plan: 'pro', source: 'landing' } });
window.plausible?.('Download', { props: { file: 'whitepaper.pdf' } });

Consent Management

// Only load analytics after consent
class ConsentManager {
  #hasConsent = false;
  #queue = [];

  grant() {
    this.#hasConsent = true;
    this.#loadGA4();
    this.#queue.forEach(([name, params]) => this.track(name, params));
    this.#queue = [];
    localStorage.setItem('analytics-consent', 'granted');
  }

  track(name, params) {
    if (this.#hasConsent) {
      gtag('event', name, params);
    } else {
      this.#queue.push([name, params]);
    }
  }

  #loadGA4() {
    const script = document.createElement('script');
    script.src = 'https://www.googletagmanager.com/gtag/js?id=G-XXXXXXXX';
    script.async = true;
    document.head.append(script);
    window.dataLayer = window.dataLayer || [];
    window.gtag = function() { dataLayer.push(arguments); };
    gtag('js', new Date());
    gtag('config', 'G-XXXXXXXX', { anonymize_ip: true });
  }
}

export const analytics = new ConsentManager();

Core Web Vitals Reporting

import { onCLS, onINP, onLCP, onFCP, onTTFB } from 'web-vitals';

function sendToAnalytics({ name, value, rating, id }) {
  track('web_vitals', {
    metric_name: name,
    metric_value: Math.round(value),
    metric_rating: rating, // 'good' | 'needs-improvement' | 'poor'
    metric_id: id,
  });
}

onCLS(sendToAnalytics);
onINP(sendToAnalytics);
onLCP(sendToAnalytics);
onFCP(sendToAnalytics);
onTTFB(sendToAnalytics);

UTM Parameter Handling

// Persist UTM params through the funnel
const params = new URLSearchParams(location.search);
const utmKeys = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_content', 'utm_term'];
const utms = Object.fromEntries(utmKeys.filter(k => params.has(k)).map(k => [k, params.get(k)]));

if (Object.keys(utms).length) {
  sessionStorage.setItem('utms', JSON.stringify(utms));
}

// Read back on conversion
const savedUtms = JSON.parse(sessionStorage.getItem('utms') || '{}');
track('purchase', { ...purchaseData, ...savedUtms });