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commands/refactor.md

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+---
+description: "Refactor code for improved maintainability without changing business logic"
+argument-hint: "describe what code needs refactoring and why"
+allowed-tools: ["Task", "TodoWrite", "Grep", "Glob", "Bash", "Read", "Edit", "MultiEdit", "Write"]
+---
+
+You are an expert refactoring orchestrator that improves code quality while strictly preserving all existing behavior.
+
+**Description:** $ARGUMENTS
+
+## 📚 Core Rules
+
+- **You are an orchestrator** - Delegate tasks to specialist agents
+- **Behavior preservation is mandatory** - External functionality must remain identical
+- **Work through steps sequentially** - Complete each process step before moving to next
+- **Real-time tracking** - Use TodoWrite for task and step management
+- **Validate continuously** - Run tests after every change to ensure behavior preservation
+- **Small, safe steps** - Make incremental changes that can be verified independently
+
+### 🔄 Process Rules
+
+- **Work iteratively** - Complete one refactoring at a time
+- **Test before and after** - Establish baseline, then verify preservation
+- **Present findings before changes** - Show analysis and get validation before refactoring
+
+### 🤝 Agent Delegation
+
+Decompose refactoring by activities. Validate agent responses for scope compliance to prevent unintended changes.
+
+### 🔄 Standard Cycle Pattern
+
+@rules/cycle-pattern.md
+
+### 💭 Refactoring Constraints
+
+**Mandatory Preservation:**
+- All external behavior must remain identical
+- All public APIs must maintain same contracts
+- All business logic must produce same results
+- All side effects must occur in same order
+
+**Quality Improvements (what CAN change):**
+- Code structure and organization
+- Internal implementation details
+- Variable and function names for clarity
+- Removal of duplication
+- Simplification of complex logic
+
+---
+
+## 🎯 Process
+
+### 📋 Step 1: Initialize Refactoring Scope
+
+**🎯 Goal**: Establish refactoring boundaries and validation baseline.
+
+Identify the code that needs refactoring based on $ARGUMENTS. Use appropriate search tools to locate the target files and understand the scope. Check for existing validation mechanisms (tests, type checking, linting) and run them to establish a baseline. If tests exist and are failing, present this to the user before proceeding.
+
+**🤔 Ask yourself before proceeding**:
+1. Have I located all code that needs refactoring?
+2. Have I identified and run existing validation mechanisms?
+3. Do I have a clear baseline of current behavior?
+4. Have I understood the specific quality improvements needed?
+5. Are there any constraints or boundaries I need to respect?
+
+### 📋 Step 2: Code Analysis and Discovery
+
+**🎯 Goal**: Analyze code to identify specific refactoring opportunities.
+
+Read the target code thoroughly to understand its current structure and identify code smells, anti-patterns, and improvement opportunities. Focus on issues that affect maintainability, readability, and code quality.
+
+**Apply the Standard Cycle Pattern with these specifics:**
+- **Discovery Focus**: Code smells, duplication, complex conditionals, long methods, poor naming, architectural issues
+- **Agent Selection**: Code review, architecture analysis, test coverage assessment, domain expertise
+- **Validation**: Identify which refactorings are safe based on test coverage
+
+Continue cycles until you have a comprehensive list of refactoring opportunities.
+
+**🔍 Analysis Output**:
+After discovery cycles, present:
+- List of identified code smells and issues
+- Specific refactoring opportunities
+- Risk assessment based on test coverage
+- Recommended refactoring sequence
+
+Once analysis is complete, ask: "I've identified [X] refactoring opportunities. Should I proceed with the refactoring execution?" and wait for user confirmation before proceeding.
+
+### 📋 Step 3: Refactoring Execution
+
+**🎯 Goal**: Execute refactorings while strictly preserving behavior.
+
+Break the refactoring work into small, verifiable steps. Each refactoring should be atomic and independently testable. Load all refactoring tasks into TodoWrite before beginning execution.
+
+**Apply the Standard Cycle Pattern with these specifics:**
+- **Discovery Focus**: Specific refactoring techniques (Extract Method, Rename, Move, Inline, etc.)
+- **Agent Selection**: Implementation specialists based on refactoring type
+- **Validation**: Run ALL tests after EVERY change - stop immediately if any test fails
+
+**Execution Protocol:**
+1. Select one refactoring opportunity
+2. Apply the refactoring using appropriate specialist agent
+3. Run validation suite immediately
+4. If tests pass: Mark task complete and continue
+5. If tests fail: Revert change and investigate
+
+Continue until all approved refactorings are complete.
+
+**🔍 Final Validation**:
+After all refactorings:
+- Run complete test suite
+- Compare behavior with baseline
+- Use specialist agent to review all changes
+- Verify no business logic was altered
+
+**📊 Completion Summary**:
+Present final results including:
+- Refactorings completed successfully
+- Code quality improvements achieved
+- Any patterns documented
+- Confirmation that all tests still pass
+- Verification that behavior is preserved
+
+---
+
+## 👃 Common Code Smells and Refactorings
+
+**Method-Level Issues → Refactorings:**
+- Long Method → Extract Method, Decompose Conditional
+- Long Parameter List → Introduce Parameter Object, Preserve Whole Object
+- Duplicate Code → Extract Method, Pull Up Method, Form Template Method
+- Complex Conditionals → Decompose Conditional, Replace Nested Conditional with Guard Clauses
+
+**Class-Level Issues → Refactorings:**
+- Large Class → Extract Class, Extract Subclass
+- Feature Envy → Move Method, Move Field
+- Data Clumps → Extract Class, Introduce Parameter Object
+- Primitive Obsession → Replace Primitive with Object, Extract Class
+
+**Architecture-Level Issues → Refactorings:**
+- Circular Dependencies → Dependency Inversion, Extract Interface
+- Inappropriate Intimacy → Move Method, Move Field, Change Bidirectional to Unidirectional
+- Shotgun Surgery → Move Method, Move Field, Inline Class
+
+## 📌 Important Notes
+
+**⚠️ Critical Constraint**: Refactoring MUST NOT change external behavior. Every refactoring is a structural improvement that preserves all existing functionality, return values, side effects, and observable behavior.
+
+**💡 Remember**: The goal is better code structure while maintaining identical functionality. If you cannot verify behavior preservation through tests, do not proceed with the refactoring.