Worked on the red/red repository to address a specific bug related to file extension handling in backend utilities. Using Rebol, implemented a targeted fix that ensures file extensions are correctly removed from filenames even when no directory path is present, resolving inconsistencies that previously led to edge-case errors. The solution involved precise debugging and a minimal, auditable code change, directly aligning with issue #3875. This update improved the reliability of file-related operations and downstream tooling dependent on robust extension parsing. Demonstrated backend development skills by enhancing the consistency and predictability of file utilities in production and deployment workflows.