What is the 'Iron Law' of this TDD skill?

The Iron Law dictates that no production code can be written without a failing test first. If code is written before a test, it must be deleted and restarted to ensure full test verification.

Can I exclude certain files from the 100% coverage rule?

Yes, exceptions are permitted for configuration files, type definitions, auto-generated code, and third-party integration code.

How does it handle external dependencies?

It provides specific guidelines to mock at boundaries, such as external APIs, databases, and the file system, while keeping your internal business logic deterministic.

Why is 'Verify Red' a mandatory step?

Verifying the 'Red' state ensures the test fails for the expected reason (the missing feature) rather than a typo or syntax error, confirming the test is actually valid.

Does this skill require 100% code coverage?

Yes, for all new code, the skill targets 100% coverage across lines, branches, functions, and statements to ensure every path is verified.

TDD & Full Coverage

Name: TDD & Full Coverage
Author: troykelly

bytroykelly

セキュリティとテスト

Enforces a strict Red-Green-Refactor cycle with a 100% code coverage requirement for reliable feature implementation and bug fixes.

概要

This skill empowers Claude to follow a rigorous Test-Driven Development (TDD) workflow, ensuring that no production code is written without a preceding failing test. By adhering to the 'Iron Law' of TDD, it guarantees that every line of code is intentional, verified, and maintainable. The skill guides the AI through the complete Red-Green-Refactor cycle, including mandatory verification of test failures, minimal code implementation to pass, and safe refactoring. It specifically targets 100% coverage for new code across lines, branches, and functions, making it ideal for mission-critical applications where regression prevention is a top priority.

主な機能

Standardized Arrange-Act-Assert (AAA) testing patterns
Mandatory 100% code coverage requirement for all new logic
Comprehensive guidelines for mocking at architectural boundaries
Strict Red-Green-Refactor development cycle enforcement
Automated verification of test failures to prevent false positives
0 GitHub stars

ユースケース

Building mission-critical features that require zero-defect reliability
Refactoring complex legacy systems with full regression safety
Standardizing high-quality testing practices across automated development workflows

概要

主な機能

Standardized Arrange-Act-Assert (AAA) testing patterns
Mandatory 100% code coverage requirement for all new logic
Comprehensive guidelines for mocking at architectural boundaries
Strict Red-Green-Refactor development cycle enforcement
Automated verification of test failures to prevent false positives
0 GitHub stars

ユースケース

Building mission-critical features that require zero-defect reliability
Refactoring complex legacy systems with full regression safety
Standardizing high-quality testing practices across automated development workflows