---
actual_hours: null
assignees: []
created_at: '2025-08-20T09:23:37.432889'
dependencies: []
description: "# Code Duplication Reduction Project\n\n## \U0001F3AF **Objective**\n\
  Reduce code duplication from 29.4% to under 10% target by extracting common patterns\
  \ and creating shared utilities across the claude-mpm codebase.\n\n## \U0001F4CA\
  \ **Current State Analysis**\n- **CLI Commands**: 15+ commands with 80% duplicate\
  \ argument parsing\n- **Service Classes**: 20+ services with 70% duplicate initialization\
  \  \n- **Configuration Loading**: 25+ modules with 90% duplicate config patterns\n\
  - **Overall Duplication**: 29.4% (target: <10%)\n\n## ✅ **Foundation Completed (Phase\
  \ 1)**\nCreated comprehensive shared utilities:\n\n### CLI Shared Utilities ()\n\
  -  - Reusable argument definitions\n-  - BaseCommand class with common functionality\n\
  -  - Centralized error handling patterns\n-  - Consistent output formatting\n\n\
  ### Service Base Classes ()\n-  - Base for async services with state management\n\
  -  - Base for configuration-heavy services\n-  - Base for complex lifecycle management\n\
  -  - Base for manager-style services\n-  - Factory for standardized service creation\n\
  \n### Core Shared Utilities ()\n-  - Centralized configuration loading with patterns\n\
  -  - Standardized path resolution\n-  - Thread-safe singleton management\n\n## \U0001F3AF\
  \ **Expected Duplication Reduction**\n- **CLI Commands**: 80% → ~15% (65% reduction)\n\
  - **Service Classes**: 70% → ~20% (50% reduction)\n- **Configuration**: 90% → ~5%\
  \ (85% reduction)\n- **Overall Target**: 29.4% → ~9.5% ✅\n\n## \U0001F4CB **Implementation\
  \ Phases**\n\n### Phase 1: Foundation ✅ COMPLETED\n- All shared utilities and base\
  \ classes implemented\n- Examples and documentation created\n- Ready for adoption\
  \ across codebase\n\n### Phase 2: CLI Command Migration (Next)\n- Refactor 15+ CLI\
  \ commands to use shared utilities\n- Estimated 2-3 hours total effort\n- Expected\
  \ 40-60% code reduction per command\n\n### Phase 3: Service Class Migration\n- Migrate\
  \ 20+ services to use base classes\n- Estimated 3-4 hours total effort\n- Expected\
  \ 30-50% code reduction per service\n\n### Phase 4: Configuration Loading Migration\n\
  - Update 25+ modules to use ConfigLoader patterns\n- Estimated 1-2 hours total effort\n\
  - Expected 60-80% reduction in config-related code\n\n### Phase 5: Validation and\
  \ Testing\n- Measure actual duplication reduction\n- Comprehensive testing and validation\n\
  - Documentation and best practices\n\n## \U0001F527 **Key Benefits**\n- **Consistency**:\
  \ All modules follow same patterns\n- **Maintainability**: Changes to shared utilities\
  \ benefit entire codebase\n- **Development Speed**: New commands/services created\
  \ much faster\n- **Code Quality**: Reduced boilerplate, focus on business logic\n\
  - **Testing**: Standardized patterns make testing easier\n\n## \U0001F4C1 **Reference\
  \ Files**\n-  - Detailed analysis and examples\n-  - Example showing 50% reduction\n\
  - All shared utility files with comprehensive documentation\n\n## \U0001F680 **Ready\
  \ for Individual Sessions**\nEach phase and task contains complete context for resuming\
  \ work in individual sessions. All foundation work is complete and ready for adoption."
due_date: null
estimated_hours: null
id: EP-0002
labels: []
metadata:
  github_id: I_kwDOPScCe87HDEyl
  github_url: https://github.com/bobmatnyc/claude-mpm/issues/53
  goal: Achieve target of <10% code duplication through systematic refactoring and
    shared utility implementation
  owner: null
  platform: github
  progress: 0
  subtasks:
  - ISS-0006
  - ISS-0007
  - ISS-0008
  - ISS-0009
  - ISS-0010
  - TSK-0128
  - TSK-0129
  - TSK-0130
  - TSK-0131
  - TSK-0132
  - TSK-0133
  - TSK-0134
  tested: true
  tested_at: '2025-08-20T11:57:57.705826'
  transitioned_to_tested_at: '2025-08-20T11:57:57.705814'
  type: epic
parent: null
priority: high
status: closed
tags:
- epic
title: Code Duplication Reduction Project
updated_at: '2025-08-20T16:34:52.866860'
---

# Code Duplication Reduction Project

## Description
# Code Duplication Reduction Project

## 🎯 **Objective**
Reduce code duplication from 29.4% to under 10% target by extracting common patterns and creating shared utilities across the claude-mpm codebase.

## 📊 **Current State Analysis**
- **CLI Commands**: 15+ commands with 80% duplicate argument parsing
- **Service Classes**: 20+ services with 70% duplicate initialization  
- **Configuration Loading**: 25+ modules with 90% duplicate config patterns
- **Overall Duplication**: 29.4% (target: <10%)

## ✅ **Foundation Completed (Phase 1)**
Created comprehensive shared utilities:

### CLI Shared Utilities ()
-  - Reusable argument definitions
-  - BaseCommand class with common functionality
-  - Centralized error handling patterns
-  - Consistent output formatting

### Service Base Classes ()
-  - Base for async services with state management
-  - Base for configuration-heavy services
-  - Base for complex lifecycle management
-  - Base for manager-style services
-  - Factory for standardized service creation

### Core Shared Utilities ()
-  - Centralized configuration loading with patterns
-  - Standardized path resolution
-  - Thread-safe singleton management

## 🎯 **Expected Duplication Reduction**
- **CLI Commands**: 80% → ~15% (65% reduction)
- **Service Classes**: 70% → ~20% (50% reduction)
- **Configuration**: 90% → ~5% (85% reduction)
- **Overall Target**: 29.4% → ~9.5% ✅

## 📋 **Implementation Phases**

### Phase 1: Foundation ✅ COMPLETED
- All shared utilities and base classes implemented
- Examples and documentation created
- Ready for adoption across codebase

### Phase 2: CLI Command Migration (Next)
- Refactor 15+ CLI commands to use shared utilities
- Estimated 2-3 hours total effort
- Expected 40-60% code reduction per command

### Phase 3: Service Class Migration
- Migrate 20+ services to use base classes
- Estimated 3-4 hours total effort
- Expected 30-50% code reduction per service

### Phase 4: Configuration Loading Migration
- Update 25+ modules to use ConfigLoader patterns
- Estimated 1-2 hours total effort
- Expected 60-80% reduction in config-related code

### Phase 5: Validation and Testing
- Measure actual duplication reduction
- Comprehensive testing and validation
- Documentation and best practices

## 🔧 **Key Benefits**
- **Consistency**: All modules follow same patterns
- **Maintainability**: Changes to shared utilities benefit entire codebase
- **Development Speed**: New commands/services created much faster
- **Code Quality**: Reduced boilerplate, focus on business logic
- **Testing**: Standardized patterns make testing easier

## 📁 **Reference Files**
-  - Detailed analysis and examples
-  - Example showing 50% reduction
- All shared utility files with comprehensive documentation

## 🚀 **Ready for Individual Sessions**
Each phase and task contains complete context for resuming work in individual sessions. All foundation work is complete and ready for adoption.

## Details
- **Status**: closed
- **Priority**: high
- **Assignees**: None
- **Tags**: epic
- **Created**: 2025-08-20 09:23:37
- **Updated**: 2025-08-20 16:34:52

## Tasks
- [ ] Add task items here

## Notes
_Add any additional notes or context here._
