tdd-mutation-testerlisted

# TDD Mutation Tester ## Core Principles 1. **Verify Assertion Quality**: Coverage percentage can be misleading. Tests must fail when business logic changes. 2. **Mutation Process**: - Locate the core logic implemented by the `implementer`. - Temporarily mutate a logical operator (e.g. swap `>` for `<`, `==` for `!=`, `+` for `-`, or invert a boolean). - Run the test suite. - **Expected Result**: At least one test MUST fail. - **Clean Up**: Revert the mutated symbol immediately after running the test. 3. **Scorecard**: If the test suite passes even with mutated business logic, report a "0 in Real Coverage" on the scorecard and return the task for better test assertions.