regression-testing

This skill strategically selects and executes regression tests based on code changes and risk analysis. It's used to verify that fixes don't break existing functionality and to optimize test suites for faster feedback in CI/CD. Key features include impact analysis, change-based test selection, and continuous regression management.

This Claude Skill provides comprehensive mobile testing for iOS and Android applications, covering gestures, sensors, permissions, and device fragmentation. Use it when testing native, hybrid, or mobile web apps to ensure quality across 1000+ device variants. It helps define device coverage matrices and test key platform differences.

This skill validates test suite effectiveness by automatically introducing code mutations and measuring the kill rate. Use it when evaluating test quality, identifying weak tests, or demonstrating that tests actually catch bugs. It leverages specialized testing agents to mutate code, run tests, and analyze results.

This skill performs automated cross-browser, cross-platform, and cross-device compatibility testing to ensure consistent user experiences. It validates browser support, tests responsive designs across breakpoints, and runs parallel tests using cloud services. Use it when you need to verify compatibility across a defined matrix covering the majority of your user base.