tdd-workflows-tdd-refactor

Use this skill when

Do not use this skill when

Instructions

Refactor code with confidence using comprehensive test safety net:

[Extended thinking: This tool uses the tdd-orchestrator agent (opus model) for sophisticated refactoring while maintaining all tests green. It applies design patterns, improves code quality, and optimizes performance with the safety of comprehensive test coverage.]

Usage

Use Task tool with subagent_type="tdd-orchestrator" to perform safe refactoring.

Prompt: "Refactor this code while keeping all tests green: $ARGUMENTS. Apply TDD refactor phase:

Core Process

1. Pre-Assessment

2. Code Smell Detection

3. Design Patterns

4. SOLID Principles

5. Refactoring Techniques

6. Performance Optimization

7. Incremental Steps

8. Architecture Evolution

9. Safety Verification

10. Advanced Patterns

Output Requirements

Safety Checklist

Before committing:

Recovery Protocol

If tests fail:

Example: Extract Method Pattern

Before:

class OrderProcessor {
  processOrder(order: Order): ProcessResult {
    // Validation
    if (!order.customerId || order.items.length === 0) {
      return { success: false, error: "Invalid order" };
    }
    // Calculate totals
    let subtotal = 0;
    for (const item of order.items) {
      subtotal += item.price  item.quantity;
    }
    let total = subtotal + (subtotal  0.08) + (subtotal > 100 ? 0 : 15);
    // Process payment...
    // Update inventory...
    // Send confirmation...
  }
}

After:

class OrderProcessor {
  async processOrder(order: Order): Promise<ProcessResult> {
    const validation = this.validateOrder(order);
    if (!validation.isValid) return ProcessResult.failure(validation.error);
    const orderTotal = OrderTotal.calculate(order);
    const inventoryCheck = await this.inventoryService.checkAvailability(order.items);
    if (!inventoryCheck.available) return ProcessResult.failure(inventoryCheck.reason);
    await this.paymentService.processPayment(order.paymentMethod, orderTotal.total);
    await this.inventoryService.reserveItems(order.items);
    await this.notificationService.sendOrderConfirmation(order, orderTotal);
    return ProcessResult.success(order.id, orderTotal.total);
  }
  private validateOrder(order: Order): ValidationResult {
    if (!order.customerId) return ValidationResult.invalid("Customer ID required");
    if (order.items.length === 0) return ValidationResult.invalid("Order must contain items");
    return ValidationResult.valid();
  }
}

Applied: Extract Method, Value Objects, Dependency Injection, Async patterns

Code to refactor: $ARGUMENTS"