Provides a mandatory, non-negotiable workflow for ensuring code quality through consistent linting and testing. This skill dictates a strict protocol for every code change, distinguishing between rapid, mocked tests for development iteration and a comprehensive, parallel test suite required before a task is considered complete. It enforces precise language for reporting test outcomes, preventing misleading claims like 'all tests pass' without full verification. The skill includes a 'Stash/Pop Verification Protocol' to scientifically attribute test failures and integrates with other skills like `test-fixer` to create a robust and reliable development lifecycle.
