Contributed a targeted feature enhancement to the gwastro/pycbc repository by improving the help and usability of the --filter-string option in the pycbc_plot_singles_vs_params command-line tool. Focused on documentation-driven development, the work expanded the help string to include a clear usage example and clarified that filter parameters should originate from trigger or bank parameters. This approach aimed to reduce user confusion, streamline analyst onboarding, and improve plotting workflows. Leveraged Python and command-line interface skills to deliver a maintainable update that aligns with project standards, emphasizing code quality and traceability while addressing a specific user-facing need within the documentation.