He4rt Marketing Extension Skill

Skill by ara.so — Marketing Skills collection.

Overview

The He4rt Marketing Extension is a Chrome browser extension that passively intercepts X/Twitter GraphQL API responses to capture community engagement metrics. It's designed for community managers who need granular engagement data that Twitter's native analytics don't provide — like bulk engagement exports, consistent community member interactions, reply tracking across posts, and favoriter lists.

The extension runs in the background while you browse X, captures GraphQL responses, deduplicates data, and exports structured JSON ready for ingestion into a Laravel backend (or any analytics system).

Installation

Clone or Download: Get the extension files into a local directory
Load in Chrome:

Navigate to chrome://extensions/
Enable Developer mode (toggle in top right)
Click Load unpacked
Select the extension directory

Verify: The He4rt Analytics icon should appear in your extensions toolbar

Architecture

The extension uses three core scripts:

interceptor.js: Runs in MAIN world (page context) to patch window.fetch() and intercept GraphQL responses
content.js: Runs in ISOLATED world (extension context) to bridge page → background via chrome.runtime.sendMessage
background.js: Service worker that filters, consolidates, deduplicates, and stores captured data

Communication flow:

X.com page → interceptor.js (fetch patch) → postMessage → content.js → chrome.runtime → background.js → chrome.storage

Key Workflows

1. Start Tracking an Account

Open the extension popup and set the Twitter handle to track:

// In popup.js - setting tracked handle
document.getElementById('trackBtn').addEventListener('click', async () => {
  const handle = document.getElementById('handleInput').value.trim().replace('@', '');
  
  await chrome.storage.local.set({ trackedHandle: handle });
  
  // Notify background script
  chrome.runtime.sendMessage({ 
    type: 'SET_TRACKED_HANDLE', 
    handle 
  });
});

User action: Type the handle (e.g., He4rtDevs) and click "Track"

2. Passive Data Capture

Once tracking is active, browse normally on x.com:

Scroll the tracked account's profile → Captures UserTweets endpoint (tweets + metrics)
Click on a tweet's like count → Captures Favoriters endpoint (users who liked)
Open individual tweets → Captures TweetDetail endpoint (replies)
Visit the profile → Captures UserByScreenName endpoint (profile data)

The extension automatically filters for the tracked handle and stores relevant data.

3. Export Captured Data

Click "Export JSON" in the popup to download structured data:

// In popup.js - export logic
document.getElementById('exportBtn').addEventListener('click', async () => {
  const response = await chrome.runtime.sendMessage({ type: 'EXPORT_JSON' });
  
  const blob = new Blob([JSON.stringify(response.data, null, 2)], { 
    type: 'application/json' 
  });
  const url = URL.createObjectURL(blob);
  
  const a = document.createElement('a');
  a.href = url;
  a.download = `x-${response.trackedHandle}-${new Date().toISOString().split('T')[0]}.json`;
  a.click();
  
  URL.revokeObjectURL(url);
});

Captured Data Structure

Export JSON Schema

{
  "tracked_account": {
    "screen_name": "He4rtDevs",
    "name": "He4rt Developers",
    "rest_id": "1098020856431824897",
    "followers_count": 20945,
    "following_count": 1250,
    "statuses_count": 2178,
    "description": "Community bio...",
    "verified": false
  },
  "exported_at": "2026-05-19T00:15:00.000Z",
  "tweets": [
    {
      "tweet_id": "2056491987205865474",
      "text": "Tweet content...",
      "type": "original",
      "created_at": "2026-05-18T23:30:00.000Z",
      "metrics": {
        "favorite_count": 8,
        "retweet_count": 4,
        "reply_count": 2,
        "quote_count": 1,
        "bookmark_count": 0,
        "view_count": 354
      },
      "hashtags": ["He4rtDevelopers"],
      "user_mentions": [{"screen_name": "He4rtDevs", "id": "..."}],
      "media_count": 2,
      "source": "Twitter for iPhone"
    }
  ],
  "community_replies": [
    {
      "tweet_id": "2056491988000000001",
      "author": {
        "screen_name": "community_member",
        "rest_id": "123456789",
        "followers_count": 150,
        "verified": false
      },
      "text": "Reply text...",
      "in_reply_to_tweet_id": "2056491987205865474",
      "created_at": "2026-05-19T00:00:00.000Z"
    }
  ],
  "favoriters_by_tweet": {
    "2056491987205865474": [
      {
        "rest_id": "987654321",
        "screen_name": "engaged_user",
        "name": "Display Name",
        "followers_count": 500,
        "following": true,
        "followed_by": true,
        "verified": false
      }
    ]
  },
  "summary": {
    "total_tweets": 20,
    "total_original": 15,
    "total_retweets": 3,
    "total_replies": 2,
    "total_community_replies": 45,
    "total_likes": 500,
    "total_views": 15000,
    "avg_likes_per_original": 33,
    "avg_views_per_original": 1000,
    "unique_engagers": 87,
    "top_tweet_by_likes": "2052386746126553531",
    "top_tweet_by_views": "2051468028299153703"
  }
}

Integration with Backend (Laravel Example)

Ingestion Command

<?php

namespace App\Console\Commands;

use App\Models\TwitterAccount;
use App\Models\Tweet;
use App\Models\CommunityEngagement;
use Illuminate\Console\Command;

class IngestTwitterAnalytics extends Command
{
    protected $signature = 'analytics:ingest {file}';
    protected $description = 'Ingest exported JSON from He4rt Analytics extension';

    public function handle()
    {
        $path = $this->argument('file');
        
        if (!file_exists($path)) {
            $this->error("File not found: {$path}");
            return 1;
        }

        $data = json_decode(file_get_contents($path), true);
        
        // Upsert tracked account
        $account = TwitterAccount::updateOrCreate(
            ['rest_id' => $data['tracked_account']['rest_id']],
            [
                'screen_name' => $data['tracked_account']['screen_name'],
                'name' => $data['tracked_account']['name'],
                'followers_count' => $data['tracked_account']['followers_count'],
                'following_count' => $data['tracked_account']['following_count'] ?? null,
                'statuses_count' => $data['tracked_account']['statuses_count'],
                'description' => $data['tracked_account']['description'] ?? null,
                'verified' => $data['tracked_account']['verified'] ?? false,
            ]
        );

        $this->info("Updated account: @{$account->screen_name}");

        // Upsert tweets
        foreach ($data['tweets'] as $tweetData) {
            Tweet::updateOrCreate(
                ['tweet_id' => $tweetData['tweet_id']],
                [
                    'twitter_account_id' => $account->id,
                    'text' => $tweetData['text'],
                    'type' => $tweetData['type'],
                    'created_at' => $tweetData['created_at'],
                    'favorite_count' => $tweetData['metrics']['favorite_count'],
                    'retweet_count' => $tweetData['metrics']['retweet_count'],
                    'reply_count' => $tweetData['metrics']['reply_count'],
                    'quote_count' => $tweetData['metrics']['quote_count'],
                    'view_count' => $tweetData['metrics']['view_count'] ?? null,
                    'hashtags' => json_encode($tweetData['hashtags'] ?? []),
                    'media_count' => $tweetData['media_count'] ?? 0,
                ]
            );
        }

        $this->info("Ingested {$data['summary']['total_tweets']} tweets");

        // Track community replies
        foreach ($data['community_replies'] ?? [] as $reply) {
            CommunityEngagement::updateOrCreate(
                [
                    'tweet_id' => $reply['tweet_id'],
                    'author_rest_id' => $reply['author']['rest_id'],
                ],
                [
                    'author_screen_name' => $reply['author']['screen_name'],
                    'engagement_type' => 'reply',
                    'in_reply_to_tweet_id' => $reply['in_reply_to_tweet_id'],
                    'followers_count' => $reply['author']['followers_count'],
                    'engaged_at' => $reply['created_at'],
                ]
            );
        }

        // Track favoriters
        foreach ($data['favoriters_by_tweet'] ?? [] as $tweetId => $users) {
            foreach ($users as $user) {
                CommunityEngagement::updateOrCreate(
                    [
                        'tweet_id' => $tweetId,
                        'author_rest_id' => $user['rest_id'],
                        'engagement_type' => 'like',
                    ],
                    [
                        'author_screen_name' => $user['screen_name'],
                        'followers_count' => $user['followers_count'],
                        'is_mutual' => $user['following'] && $user['followed_by'],
                        'engaged_at' => now(), // Approximate
                    ]
                );
            }
        }

        $this->info("Tracked {$data['summary']['unique_engagers']} unique engagers");
        $this->info("Ingestion complete!");

        return 0;
    }
}

Database Schema Example

// Migration for tweets table
Schema::create('tweets', function (Blueprint $table) {
    $table->id();
    $table->string('tweet_id')->unique();
    $table->foreignId('twitter_account_id')->constrained();
    $table->text('text');
    $table->enum('type', ['original', 'retweet', 'reply', 'quote']);
    $table->integer('favorite_count')->default(0);
    $table->integer('retweet_count')->default(0);
    $table->integer('reply_count')->default(0);
    $table->integer('quote_count')->default(0);
    $table->integer('view_count')->nullable();
    $table->json('hashtags')->nullable();
    $table->integer('media_count')->default(0);
    $table->timestamps();
    
    $table->index('created_at');
});

// Migration for community_engagements table
Schema::create('community_engagements', function (Blueprint $table) {
    $table->id();
    $table->string('tweet_id');
    $table->string('author_rest_id');
    $table->string('author_screen_name');
    $table->enum('engagement_type', ['like', 'reply', 'retweet', 'quote']);
    $table->string('in_reply_to_tweet_id')->nullable();
    $table->integer('followers_count')->nullable();
    $table->boolean('is_mutual')->default(false);
    $table->timestamp('engaged_at')->nullable();
    $table->timestamps();
    
    $table->unique(['tweet_id', 'author_rest_id', 'engagement_type']);
    $table->index('author_screen_name');
});

Extension Development Patterns

Adding Custom GraphQL Endpoint Parsing

To capture additional endpoints, modify background.js:

// In background.js
chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
  if (message.type === 'GRAPHQL_RESPONSE') {
    const { url, data, trackedHandle } = message;

    // Custom endpoint: Retweeters
    if (url.includes('Retweeters')) {
      const retweeters = extractRetweeters(data);
      const tweetId = extractTweetIdFromUrl(url);
      
      chrome.storage.local.get(['retweetersByTweet'], (result) => {
        const existing = result.retweetersByTweet || {};
        existing[tweetId] = retweeters;
        
        chrome.storage.local.set({ retweetersByTweet: existing });
      });
    }
  }
});

function extractRetweeters(data) {
  try {
    const timeline = data?.data?.retweeters_timeline?.timeline;
    const entries = timeline?.instructions?.find(i => i.type === 'TimelineAddEntries')?.entries || [];
    
    return entries
      .filter(e => e.entryId.startsWith('user-'))
      .map(e => {
        const user = e.content?.itemContent?.user_results?.result?.legacy;
        return {
          rest_id: user?.id_str,
          screen_name: user?.screen_name,
          name: user?.name,
          followers_count: user?.followers_count,
        };
      })
      .filter(u => u.rest_id);
  } catch (e) {
    console.error('Error extracting retweeters:', e);
    return [];
  }
}

Custom Export Filters

Filter exported data programmatically:

// Export only high-performing tweets
async function exportHighPerformers(minLikes = 10, minViews = 1000) {
  const response = await chrome.runtime.sendMessage({ type: 'EXPORT_JSON' });
  const data = response.data;
  
  data.tweets = data.tweets.filter(t => 
    t.metrics.favorite_count >= minLikes && 
    t.metrics.view_count >= minViews
  );
  
  // Recalculate summary
  data.summary.total_tweets = data.tweets.length;
  data.summary.total_likes = data.tweets.reduce((sum, t) => sum + t.metrics.favorite_count, 0);
  
  return data;
}

Webhook Integration (Auto-Push)

Instead of manual exports, push to an API endpoint:

// In background.js - add periodic sync
chrome.alarms.create('syncAnalytics', { periodInMinutes: 60 });

chrome.alarms.onAlarm.addListener(async (alarm) => {
  if (alarm.name === 'syncAnalytics') {
    const data = await buildExportJSON();
    
    // Push to your API
    fetch(process.env.HE4RT_API_ENDPOINT, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'Authorization': `Bearer ${process.env.HE4RT_API_TOKEN}`,
      },
      body: JSON.stringify(data),
    })
    .then(res => console.log('Synced analytics:', res.status))
    .catch(err => console.error('Sync failed:', err));
  }
});

Troubleshooting

Extension Not Capturing Data

Symptom: Popup shows 0 tweets captured after browsing

Solutions:

Check tracked handle: Open popup → verify handle is set correctly (no @ symbol)
Verify you're on x.com: Extension only runs on ://x.com/ and ://twitter.com/
Inspect console: Right-click extension icon → Inspect popup → check Console for errors
Check background service worker: chrome://extensions/ → He4rt Analytics → "service worker" link → check logs
Reload extension: Toggle off/on in chrome://extensions/

Favoriters Not Captured

Symptom: favoriters_by_tweet is empty in export

Cause: Must manually click on the like count to trigger the Favoriters GraphQL request

Solution:

Click the "X likes" text on a tweet (not the heart icon)
Wait for modal to load
Scroll through the list of users
Extension captures all visible users

Duplicate Tweets in Export

Symptom: Same tweet_id appears multiple times

Cause: Bug in deduplication logic in background.js

Solution: Check consolidateTweets() function uses proper Map-based deduplication:

function consolidateTweets(tweets) {
  const map = new Map();
  
  tweets.forEach(tweet => {
    if (!map.has(tweet.tweet_id)) {
      map.set(tweet.tweet_id, tweet);
    }
  });
  
  return Array.from(map.values());
}

CSP Errors in Console

Symptom: Refused to execute inline script errors

Cause: X.com's Content Security Policy blocks inline scripts

Solution: Ensure interceptor.js uses "world": "MAIN" in manifest.json:

{
  "content_scripts": [
    {
      "matches": ["*://x.com/*", "*://twitter.com/*"],
      "js": ["interceptor.js"],
      "run_at": "document_start",
      "world": "MAIN"
    }
  ]
}

Extension Breaks X.com Functionality

Symptom: X.com stops loading tweets or errors out

Cause: fetch() patch breaking original requests

Solution: Ensure interceptor.js properly clones and passes through responses:

const originalFetch = window.fetch;
window.fetch = async function(...args) {
  const response = await originalFetch.apply(this, args);
  
  // Clone before reading (response can only be read once)
  const clonedResponse = response.clone();
  
  // Process clone, return original
  processGraphQLResponse(args[0], clonedResponse);
  
  return response; // Original unmodified
};

Environment Variables

When integrating with backend APIs, use environment variables:

// For Chrome extensions, use chrome.storage for config
chrome.storage.sync.get(['apiEndpoint', 'apiToken'], (config) => {
  const API_ENDPOINT = config.apiEndpoint || 'https://hub.heartdevs.com/api/analytics';
  const API_TOKEN = config.apiToken || '';
  
  // Use in fetch calls
});

Set via options page:

// options.js
document.getElementById('saveConfig').addEventListener('click', () => {
  const apiEndpoint = document.getElementById('apiEndpoint').value;
  const apiToken = document.getElementById('apiToken').value;
  
  chrome.storage.sync.set({ apiEndpoint, apiToken }, () => {
    alert('Configuration saved!');
  });
});

Best Practices

Respect Rate Limits: Don't auto-scroll aggressively; capture data during normal browsing
Privacy: Only track public data; never capture DMs or private account data
Data Hygiene: Regularly export and clear old data to prevent storage bloat
Testing: Test on a secondary account before tracking production community accounts
Version Control: Keep manifest.json version synced with releases for update tracking

he4rt-marketing-extension