Worked on stabilizing the facebookincubator/cinderx repository by addressing a critical dependency issue that caused unreliable test behavior. Used Python to identify and revert a change that made cinderx depend on _cinderx, which had introduced instability and subprocess failures. Applied debugging and testing skills to bisect the root cause, collaborating with other teams to validate the solution. Restored full test coverage by re-enabling previously skipped tests, ensuring a reliable continuous integration signal for downstream users. This work maintained a stable baseline for the project and laid the foundation for a more robust dependency management strategy in future development cycles.