Test-Driven Development

Who Is This For?

Software developers and engineering teams who want to write more reliable, maintainable code while reducing bugs and technical debt. This skill is particularly valuable for developers working on complex applications, mission-critical features, or codebases that require high test coverage and quality standards.

What Does It Do?

Test-Driven Development (TDD) guides you through the proven "red-green-refactor" cycle of writing tests before implementation code. It helps you design better software architectures by forcing you to think through requirements and edge cases up front, while ensuring every feature is properly tested. The skill provides structured prompts and feedback to help you write effective unit tests, identify test cases, and refactor with confidence knowing your tests will catch regressions.

When Should You Use This?

Use this skill when starting any new feature implementation, bug fix, or code refactoring to ensure proper test coverage from the beginning. It's especially useful when working on complex business logic, public APIs, or critical system components where reliability is paramount. The skill can also help rescue legacy code by gradually adding tests before making changes.