Over a two-month period, Hagemann focused on improving reliability and compatibility in Julia package infrastructure. In JuliaLang/Pkg.jl, he upgraded the StaticArrays dependency within the test suite, ensuring tests exercised against recent versions and reducing CI flakiness. His approach emphasized careful dependency management and thorough documentation of changes, supporting maintainable test infrastructure. Later, in JuliaRegistries/General, Hagemann addressed cross-version compatibility by restricting StaticArrays.jl to Julia 1.10 and below for certain versions, preventing errors on older Julia releases. His work demonstrated depth in package management, version control, and testing, resulting in more stable builds and smoother downstream compatibility for users.