James developed a new runtime configuration capability for the runloopai/api-client-python repository, introducing a run_profile parameter to the scenario start functionality. This enhancement allowed users to specify runtime configurations when initiating scenario runs, supporting both synchronous and asynchronous workflows. James ensured the new parameter integrated seamlessly with existing API surfaces, maintaining backward compatibility while expanding the client’s configurability. The work involved thorough validation of end-to-end usage across different orchestration paths, demonstrating careful attention to integration quality. Utilizing Python and API client development skills, James delivered a focused, well-scoped feature that addressed evolving requirements for flexible runtime scenario management without introducing regressions.