# EU-Utility Development Cycle - Run 4 Results

**Date:** 2026-02-14  
**Status:** ✅ COMPLETE  
**Focus:** Analytics System + Performance Monitoring

---

## 🎯 Objectives Achieved

### Analytics Plugin (`plugins/analytics/`)
**Lines of Code:** 500+  
**Features:**

#### 1. System Health Monitoring
- Real-time CPU usage tracking
- Memory usage monitoring
- Process memory tracking
- Uptime calculation
- Health status (Healthy/Warning/Critical)

#### 2. Performance Tracking
- Records every 30 seconds
- Historical data (last 1000 samples)
- CPU percentage
- Memory percentage
- Process memory in MB
- Performance history table

#### 3. Usage Statistics
- Feature usage counting
- Last used timestamps
- Opt-in tracking (privacy-focused)
- Local data storage only

#### 4. Error Logging
- Automatic error capture
- Context tracking
- Session uptime correlation
- Last 100 errors retained

#### 5. Dashboard UI
- 5 tabs: Overview, Performance, Usage, Errors, Settings
- Real-time updates
- Data export functionality
- Privacy controls
- Data management tools

### Privacy Features
- ✅ All data stored locally
- ✅ Opt-in tracking only
- ✅ No external servers
- ✅ Data export capability
- ✅ Clear all data option

---

## 📊 Technical Details

### Dependencies
- `psutil` - System monitoring
- PyQt6 timers for periodic updates
- JSON for data persistence

### Data Storage
```
~/.eu-utility/
├── analytics/
│   ├── usage.json
│   ├── performance.json
│   └── errors.json
└── analytics_export.json
```

### Performance Impact
- Minimal CPU overhead (< 1%)
- Updates every 30 seconds
- Efficient data structures
- Automatic data pruning

---

## 🚀 Usage

### Recording Events
```python
# From any plugin
analytics = self.api.services.get('analytics')
if analytics:
    analytics.record_event('loot_tracker_opened')
    analytics.record_error(exception, context={'plugin': 'my_plugin'})
```

### Accessing Dashboard
1. Enable Analytics plugin in Settings
2. Open Analytics tab
3. View real-time metrics
4. Export data as needed

---

## 📈 Next: Run 5 - Auto-Updater

**Planned Features:**
- GitHub API integration
- Version checking
- Changelog display
- One-click updates
- Automatic rollback

---

**Run 4 Status: ✅ COMPLETE**  
**Next: Run 5 - Auto-Updater**