About
The Testing Implementation skill provides Claude with specialized guidance for writing, running, and validating software tests. It covers the full testing pyramid—from high-speed unit tests to complex end-to-end workflows—using industry-standard tools like JUnit, MockK, Jest, and Pytest. By enforcing patterns like Arrange-Act-Assert and identifying critical edge cases, this skill ensures code reliability, identifies implementation bugs early, and helps teams hit high code coverage targets across JVM, JavaScript, and Python ecosystems.