Worked on the rizinorg/rizin repository to enhance the stability of its command line debugger integration. Focused on improving the open-files listing feature, this developer addressed a crash that occurred when using the o= command with winedbg:// by implementing defensive logic in C to prevent division-by-zero errors during progress bar calculations. The solution involved detecting cases where the total file size was zero and ensuring the progress calculation handled this gracefully. By fixing this bug, the developer improved the reliability of the debugging workflow, reduced user-reported crashes, and contributed to a more robust command line interface experience for rizin users.