Overview

Test-Driven Development (TDD) principles and red-green-refactor cycle enforcement.

Overview

This plugin provides comprehensive Test-Driven Development guidance and automatic enforcement through hooks. It ensures that Claude follows the TDD cycle when writing new code, fixing bugs, or adding features.

Features

• TDD Skill: Complete guidance on the red-green-refactor cycle
• Automatic Enforcement: Hooks that remind Claude to follow TDD on every user prompt
• Best Practices: Detailed examples and patterns for different technology stacks

What is TDD?

Test-Driven Development is a software development approach where you:

1. RED: Write a failing test first
2. GREEN: Write minimal code to make it pass
3. REFACTOR: Improve the code while keeping tests green

When to Use

Install this plugin when working on:

• Projects that require high code quality
• Teams practicing TDD
• Codebases with comprehensive test coverage
• Any project where you want to ensure tests are written before implementation

Hooks

This plugin includes hooks that:

• Inject TDD reminders on every user prompt (UserPromptSubmit)
• Remind subagents to follow TDD when they complete (SubagentStop)

Skills Included

• test-driven-development: Complete TDD guidance with red-green-refactor cycle

Example Workflow

# User asks: "Add a function to calculate tax"

# 1. Claude writes failing test first
test "calculates tax on amount" do
  result = Calculator.calculate_tax(100)
  assert result == 8.0
end

# 2. Runs test - should FAIL
mix test

# 3. Implements minimal code
def calculate_tax(amount) do
  amount * 0.08
end

# 4. Runs test - should PASS
mix test

# 5. Refactors if needed
def calculate_tax(amount) do
  amount * @tax_rate
end

Installation

Install with npx (no installation required):

han plugin install jutsu-tdd

License

MIT