Branch Comparison

name: branch-comparison version: 1.0.1 description: "[Git] Use when the user asks to compare branches, analyze git diffs, review changes between branches, update specifications based on code changes, or analyze what changed. Triggers on keywords like "compare branches", "git diff", "what changed", "branch comparison", "code changes", "spec update"."

allowed-tools: Read, Write, Edit, Bash, Grep, Glob, Task, TaskCreate

[IMPORTANT] Use TaskCreate to break ALL work into small tasks BEFORE starting — including tasks for each file read. This prevents context loss from long files. For simple tasks, AI MUST ask user whether to skip.

Quick Summary

Goal: Analyze all file changes between git branches, perform impact analysis, and update specification documents.

Workflow:

1. Discovery — Run git diff/log, classify changes (Frontend/Backend, Feature/Bugfix)
2. Knowledge Graph — Document each changed file with dependencies, impact level, service context
3. Analysis — Code review (strengths, weaknesses, security), refactoring recommendations
4. Approval Gate — Present findings for explicit approval before updating specs
5. Spec Update — Update requirements, tests, architecture docs based on approved analysis

Key Rules:

• Must read evidence-based-reasoning-protocol.md before executing
• All analysis must be evidence-based from actual git diffs
• Never proceed past approval gate without explicit user approval

Be skeptical. Apply critical thinking, sequential thinking. Every claim needs traced proof, confidence percentages (Idea should be more than 80%).

Branch Comparison & Specification Update

You are to operate as an expert full-stack dotnet angular principle developer, software architect, and technical analyst to analyze all file changes between branches, perform comprehensive impact analysis, and update specification documents.

IMPORTANT: Always thinks hard, plan step by step to-do list first before execute. Always remember to-do list, never compact or summary it when memory context limit reach. Always preserve and carry your to-do list through every operation.

Prerequisites: ⚠️ MUST READ .claude/skills/shared/evidence-based-reasoning-protocol.md before executing.

PHASE 1: EXTERNAL MEMORY-DRIVEN BRANCH ANALYSIS

Build a structured knowledge model in .ai/workspace/analysis/[comparison-name].analysis.md.

PHASE 1A: INITIALIZATION AND DISCOVERY

1. Initialize the analysis file with standard headings

GIT BRANCH ANALYSIS DISCOVERY

GIT_DIFF_COMPREHENSIVE_ANALYSIS: Start with systematic git change detection:

1. Primary Change Detection Commands:

git diff --name-status [source-branch]..[target-branch]
git diff --stat [source-branch]..[target-branch]
git log --oneline [source-branch]..[target-branch]

Document results under ## Git Diff Analysis and ## Commit History.

2. Change Impact & Scope Classification: Document under ## Change Classification and ## Change Scope Analysis:
   • Types: Frontend, Backend, Config, DB
   • Purpose: Feature, Bug Fix, Refactor

RELATED_FILES_COMPREHENSIVE_DISCOVERY: For each changed file, discover all related components:

• Importers
• Dependencies
• Test files
• API consumers
• UI components

Save ALL changed files AND related files to ## Comprehensive File List with:

• filePath
• changeType
• relationshipType
• impactLevel
• serviceContext

INTELLIGENT_SCOPE_MANAGEMENT: If file list exceeds 75, prioritize by impactLevel (Critical > High > Medium > Low).

PHASE 1B: KNOWLEDGE GRAPH CONSTRUCTION

IMPORTANT: MUST DO WITH TODO LIST

For each file, document in ## Knowledge Graph:

• All standard fields from feature-implementation skill
• Focus on change-specific context

PHASE 1C: OVERALL ANALYSIS

Write comprehensive summary showing:

• Complete end-to-end workflows discovered
• Key architectural patterns and relationships
• Business logic workflows affected
• Integration points and dependencies

PHASE 2: COMPREHENSIVE ANALYSIS AND PLANNING

Generate detailed analysis under these headings:

1. Code Review Analysis

• Strengths
• Weaknesses
• Security concerns
• Performance implications
• Maintainability

2. Refactoring Recommendations

• Immediate improvements
• Structural changes
• Technical debt items

3. Specification Update Plan

• New Requirements Discovery
• Test Specification Updates
• Documentation Strategy

PHASE 3: APPROVAL GATE

CRITICAL: Present comprehensive analysis, code review, refactoring recommendations, and specification update plan for explicit approval. DO NOT proceed without it.

PHASE 4: SPECIFICATION UPDATE EXECUTION

Once approved, read existing specification document and update with:

• Requirements
• Test Specifications
• Architecture Documentation
• Code Review findings

SUCCESS VALIDATION

Verify updated specification accurately reflects all changes. Document under ## Specification Validation.

Branch Comparison Guidelines

• Evidence-Based Analysis: Start with git diff and base all updates on concrete code changes
• Comprehensive Impact Assessment: Analyze direct and indirect effects, including cross-service impacts
• Enterprise Architecture Awareness: Respect platform patterns, CQRS, and Clean Architecture
• Quality-Focused Approach: Perform thorough code review and identify refactoring opportunities
• Specification Completeness: Ensure full traceability between code, requirements, and tests

Related

• commit
• code-review

IMPORTANT Task Planning Notes (MUST FOLLOW)

• Always plan and break work into many small todo tasks
• Always add a final review todo task to verify work quality and identify fixes/enhancements