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Infrastructure as Extensions vs Built-in Extensions

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🔍 Complete Analysis & Decision Framework

A comprehensive evaluation of Symphony's infrastructure architecture choices, covering all scenarios, trade-offs, and implications.

📋 Executive Summary

🏗️ The Core Question

Should Symphony's Conductor infrastructure (Pool Management, DAG Tracking, Artifact Storage, etc.) be built as extensions or as built-in components?

🏛️ Architecture Overview

🧩 Extension Infrastructure Architecture

┌─────────────────────────────────┐
│  CONDUCTOR MICROKERNEL          │ ← Minimal orchestration logic
│  • Event routing               │
│  • Extension lifecycle         │
│  • Communication protocols     │
└─────────────────────────────────┘
            ↕️ Extension API
┌─────────────────────────────────┐
│  INFRASTRUCTURE EXTENSIONS      │ ← All infrastructure as extensions
│  🏊 Pool Manager Extension      │
│  📊 DAG Tracker Extension       │
│  📦 Artifact Store Extension    │
│  ⚖️  Arbitration Extension      │
│  🧹 Stale Manager Extension     │
└─────────────────────────────────┘

🏗️ Built-in Infrastructure Architecture

┌─────────────────────────────────┐
│  CONDUCTOR WITH INFRASTRUCTURE  │ ← All infrastructure integrated
│  • Orchestration logic         │
│  🏊 Pool Manager               │
│  📊 DAG Tracker               │
│  📦 Artifact Store            │
│  ⚖️  Arbitration Manager      │
│  🧹 Stale Manager             │
└─────────────────────────────────┘

⚡ Development Time & Complexity

📊 Time Investment Comparison

Component Built-in Time Extension Time Difference
🏊 Pool Manager 3 weeks 5 weeks +67%
📊 DAG Tracker 2 weeks 4 weeks +100%
📦 Artifact Store 4 weeks 6 weeks +50%
⚖️ Arbitration 2 weeks 3 weeks +50%
🧹 Stale Manager 1 week 2 weeks +100%
🔧 Extension System 0 weeks 6 weeks +∞
🔗 Integration 1 week 3 weeks +200%
TOTAL 13 weeks 29 weeks +123%

🧠 Complexity Comparison

🟢 Built-in Infrastructure Complexity

Complexity Sources:
• Component logic implementation
• Direct API integration
• Unit testing
• Integration testing

Complexity Level: Medium 🟡