Worked on improving the development environment and test infrastructure in the modell-aachen/modac-dev-machine-setup repository, focusing on configuration management and DevOps practices. Delivered two features: setting Cypress’s default language to English to enhance test readability for English-speaking developers, and updating the plugin.json reference to the latest modac-dev-provisioner commit, ensuring the environment benefits from recent updates and improved reproducibility through Nix integration. Utilized JSON and Shell scripting to implement these changes, prioritizing stability and onboarding efficiency. No critical bugs were reported during this period, reflecting a focus on foundational improvements that support faster onboarding and more reliable automated testing workflows.