A comprehensive TDD toolkit for iOS and macOS development that goes beyond just generating test files. It gives you specific workflows: characterization tests for capturing existing behavior before refactoring, reproduce-first bug fixes that prevent regressions, and proper red-green-refactor scaffolding for new features. The test contract system is smart, letting you define requirements like "any DataStore must handle empty state, single item, 100 items, and errors" then generating suites to validate implementations. Also includes snapshot testing setup and test data factories. The real value is in the methodology, not just boilerplate. If you're pair programming with Claude on production code, these workflows keep you from shipping untested AI-generated changes.
npx skills add https://github.com/rshankras/claude-code-apple-skills --skill testing