Marc worked on the rubyforgood/awbw repository, focusing on upgrading the application to Rails 8.1 and preparing the DevOps pipeline for production readiness. He addressed compatibility issues across multiple gems and configuration files, ensuring a smooth transition to the new Rails version. Using Ruby, Shell, and Docker, Marc stabilized the continuous integration pipeline by resolving build errors and refining the Dockerfile for more reliable deployments. He also removed the Rails Admin gem, simplifying the admin interface and reducing maintenance overhead. The work demonstrated a methodical approach to large-scale upgrades and DevOps stabilization, though it was limited to a single feature.