During their recent work, Michael Haberler contributed to both the numpy/numpy and scikit-image/scikit-image repositories, focusing on targeted improvements in testing and developer onboarding. In numpy, Michael modernized assertion keyword usage by replacing deprecated parameters with updated ones, ensuring compatibility with upcoming API changes and reducing future maintenance risks. This involved Python development and careful test suite management. In scikit-image, Michael streamlined the environment setup process by updating documentation to leverage environment.yml, consolidating dependency management into a single command. Their work demonstrated depth in environment management, documentation, and Python software development, addressing both codebase reliability and contributor experience.