During June 2025, Pierre Haessig enhanced user guidance for the ERGO-Code/HiGHS repository by developing comprehensive documentation for the HiGHS command-line interface. He focused on clarifying the supported input file formats, specifically MPS and LP, and detailed the CLI’s input requirements to reduce user confusion and onboarding friction. Using Markdown and leveraging his documentation skills, Pierre aligned the repository’s user-facing materials with the actual capabilities of the CLI. While no bugs were addressed during this period, his work improved repository hygiene and contributor guidance, providing clear, accurate information that helps both new users and contributors avoid misconfigurations and input errors.