kaizen

# Kaizen: Continuous Improvement

Apply continuous improvement mindset - suggest small iterative improvements, error-proof designs, follow established patterns, avoid over-engineering; automatically applied to guide quality and simplicity

## Overview

Small improvements, continuously. Error-proof by design. Follow what works. Build only what's needed.

**Core principle:** Many small improvements beat one big change. Prevent errors at design time, not with fixes.

## When to Use

**Always applied for:**

- Code implementation and refactoring
- Architecture and design decisions
- Process and workflow improvements
- Error handling and validation

**Philosophy:** Quality through incremental progress and prevention, not perfection through massive effort.

## The Four Pillars

### 1. Continuous Improvement (Kaizen)

Small, frequent improvements compound into major gains.

#### Principles

**Incremental over revolutionary:**

- Make smallest viable change that improves quality
- One improvement at a time
- Verify each change before next
- Build momentum through small wins

**Always leave code better:**

- Fix small issues as you encounter them
- Refactor while you work (within scope)
- Update outdated comments
- Remove dead code when you see it

**Iterative refinement:**

- First version: make it work
- Second pass: make it clear
- Third pass: make it efficient
- Don't try all three at once

<Good>
```typescript
// Iteration 1: Make it work
const calculateTotal = (items: Item[]) => {
  let total = 0;
  for (let i = 0; i < items.length; i++) {
    total += items[i].price * items[i].quantity;
  }
  return total;
};

// Iteration 2: Make it clear (refactor)
const calculateTotal = (items: Item[]): number => {
  return items.reduce((total, item) => {
    return total + (item.price * item.quantity);
  }, 0);
};

// Iteration 3: Make it robust (add validation)
const calculateTotal = (items: Item[]): number => {
  if (!items?.length) return 0;
  
  return items.reduce((total, ite