Worked on the valory-xyz/trader repository to deliver a focused regression audit for the Kelly criterion implementation, addressing changes introduced by moving profitability and side selection into the strategy layer. Applied backend development and software architecture skills using Python to document regression risks and identify split-authority issues between strategy vote and prediction_response.vote. Outlined a comprehensive set of regression tests to mitigate these risks, providing a foundation for risk-aware deployment and future test automation. The work established clear governance for high-stakes trading components and informed the development of robust regression testing strategies, supporting maintainability and reliability in the evolving codebase.