feat: Add energy/carbon tracking and timezone fix

[osmirog]

Summary

This PR adds comprehensive environmental impact tracking for LLM usage and fixes timezone handling in event capture hooks.

Features Added

🌍 Energy & Carbon Footprint Tracking

• Real-time calculation of energy consumption and carbon footprint
• Toggle-based feature via PAI_ENV_METRICS=1 in settings.json
• Integrated displays in statusline and Observability dashboard
• Research-backed methodology based on MIT study (arxiv.org/abs/2310.03003)

📊 Status Line Updates

• Shows Cost/Energy/Carbon when enabled
• Format: 💎 Tokens | 💰 Cost | ⚡ Energy | 🌍 Carbon
• Auto-detection of model type for accurate calculations

📈 Observability Dashboard Updates

• TokenUsageWidget: 2x2 grid with energy/carbon cards
• LivePulseChart: Top-right corner displays energy/carbon metrics
• Color-coded metrics (orange for energy, green for carbon)
• Real-time calculation based on token usage

🕐 Timezone Fix

• capture-all-events.ts now uses local timezone
• Auto-detects system timezone instead of hardcoded LA time
• Changed timestamp_pst to timestamp_local throughout

Technical Details

New Files

• .claude/lib/energy-calculations.sh - Calculation library with model-specific constants
• .claude/Custom_Features.md - Comprehensive feature documentation

Modified Files

• .claude/statusline-command.sh - Added energy/carbon display logic
• .claude/hooks/capture-all-events.ts - Local timezone support
• .claude/skills/Observability/apps/client/src/components/widgets/TokenUsageWidget.vue - 2x2 grid
• .claude/skills/Observability/apps/client/src/components/LivePulseChart.vue - Header metrics

Calculation Methodology

Carbon (gCO2) = Energy (kWh) × Carbon Intensity (gCO2/kWh)
Energy (Wh) = Tokens × Model Energy per Token × PUE

Model Energy Estimates (per token):

• Haiku (~20B params): 0.0003 Wh
• Sonnet (~70B params): 0.0007 Wh
• Opus (~2T params): 0.001 Wh

Constants:

• PUE (Power Usage Effectiveness): 1.2
• Default Carbon Intensity: 240 gCO2/kWh (EU average, configurable)

Configuration Example

{
  "env": {
    "PAI_ENV_METRICS": "1",
    "PAI_CARBON_INTENSITY": "240"
  }
}

Regional Carbon Intensity Values:

• EU: 240 gCO2/kWh
• US West: 240 gCO2/kWh
• US East: 429 gCO2/kWh
• Global Average: 400 gCO2/kWh

Research Sources

1. MIT Study: Power, Latency and Cost of LLM Inference Systems

   • LLaMA 65B: 3-4 Joules per token
   • Validates our Opus estimate (0.001 Wh/token ≈ 3.6 J/token)

2. Google 2025: AI Footprint Update

   • Median query: 0.24 Wh, 0.03g CO₂

3. Hugging Face: CO₂ Emissions Analysis

   • Reasoning models: 50x more CO₂ than concise models

Environmental Impact Context

Example: 1M tokens daily (mixed models)

• Energy: 732 Wh (0.732 kWh)
• Carbon: 175.68g CO₂
• Equivalent to: 🚗 Driving 1 km, 💡 Running a 60W bulb for 12 hours

Testing

• ✅ Status line displays correctly with PAI_ENV_METRICS=1
• ✅ Observability dashboard shows energy/carbon in both widgets and header
• ✅ Calculations match MIT research validation
• ✅ Timezone fix confirmed with local system timezone
• ✅ No sensitive data in commits

Documentation

Complete documentation available in .claude/Custom_Features.md including:

• Configuration instructions
• Calculation methodology
• Research sources
• Troubleshooting guide
• Future enhancements roadmap

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🤖 Generated with Claude Code

Co-Authored-By: Claude Sonnet 4.5 noreply@anthropic.com

[osmirog]

There is a better way to implement this. Working on the next version.