Developed a command line interface feature for the picnixz/cpython repository, enabling custom namespace support for UUIDv3 and UUIDv5 generation. This enhancement allows deterministic UUID creation across varied namespaces, improving integration flexibility and supporting cross-environment data integrity. The work involved extending Python-based CLI logic to handle user-defined namespaces, with careful attention to unit testing and robust command line interface development. By addressing integration friction and expanding namespace-driven use cases, the contribution supports downstream systems that rely on consistent identifier generation. Collaboration was demonstrated through co-authored commits and transparent pull request documentation, reflecting a methodical and accountable engineering approach.