Worked on enhancing process execution within the flix/flix repository, focusing on backend and system programming using Flix and Scala. Developed features that allow processes to run with specified working directories and environment variables, supporting more isolated and reproducible workflows. Improved error handling by refining I/O failure detection and introducing explicit error propagation through a new ProcessWithResult effect, which models both success and failure outcomes. These changes enable more robust automation and clearer failure modes for process management. The work demonstrates a methodical approach to extending core system capabilities, emphasizing reliability, flexibility, and composability within the existing process execution model.