Marc Arba focused on enhancing the egenomics/agb2025 repository by improving the installation and data management processes for Kraken2 and QIIME2 databases. He automated the download workflow by renaming the setup script to INSTALLME.sh and reorganized downloaded data into a dedicated databases directory, streamlining reproducibility and onboarding for new users. Marc updated the installation steps and README documentation to provide clear guidance, reducing manual intervention and ensuring consistent data structure across runs. His work leveraged Bash scripting and configuration management skills, resulting in a cleaner, more maintainable pipeline setup. The changes addressed reliability and usability for future development efforts.