[Epic] Incremental Architecture Modernization

[IsmaelMartinez]

This epic tracks incremental refactoring to reduce index.js complexity and improve code organization.

📋 Detailed Plan: docs-site/docs/development/research/incremental-refactoring-plan.md

Goals

• Reduce index.js from 755 → 381 lines (49% reduction)
• Extract IPC handlers from centralized file (74% reduction)
• Improve testability and add automated tests
• Each change is small, independent, and production-ready

Approach

Small, reversible extractions that deliver value immediately. No big-bang rewrite. Each step can be merged and deployed independently.

Phases

• Phase 1: Extract Pure Functions ([Feat]: [Refactoring Phase 1] Extract Pure Functions from index.js #1960)

  • Command line logic ✅ Complete (96 lines removed)
  • Notification system
  • Screen sharing handlers
  • Partitions & idle state

• Phase 2: Testability & Quality ([Feat]: [Refactoring Phase 2] Testability & Quality Improvements #1961)

  • Singleton refactoring
  • IPC registration pattern fixes
  • Automated testing (20+ tests)
  • Documentation automation

Progress

Current: 96 / 374 lines extracted (26% of Phase 1)

See plan document for detailed progress tracking.