Worked on the Azure/c-util repository to streamline the threadpool API by removing the threadpool_open and threadpool_close functions from the watchdog threadpool implementation. This change focused on simplifying the initialization and deinitialization process while ensuring that the core threadpool creation and destruction mechanisms remained stable. The approach emphasized maintainability and reduced lifecycle complexity, making future refactoring more straightforward. Utilizing C programming, code refactoring, and unit testing skills, the developer delivered a focused update that reduced the API surface area and improved code clarity. All modifications were captured in a traceable commit, supporting robust development practices and ongoing codebase reliability.