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Streamline your quality assurance process with expert guidance on building pragmatic, maintainable test suites for TypeScript applications. This skill helps you navigate popular testing frameworks like Vitest, Jest, and Playwright while enforcing a behavioral testing philosophy that avoids brittle implementation details. Whether you are adding regression tests for newly discovered bugs, refactoring legacy code with confidence, or setting up a robust testing stack from scratch, it provides the structural patterns and library-specific best practices needed to ensure long-term code reliability without the overhead of flaky tests.