Christoph enhanced the Z3 solver packaging within the ocaml/opam-repository, focusing on reliable integration and cross-platform compatibility. He upgraded Z3 to versions 4.14.1 and 4.15.1, streamlined dependencies, and introduced build and install patches to ensure reproducible installs for OCaml users. Addressing macOS Apple Silicon support, Christoph contributed to both the Z3Prover/z3 and opam-repository projects by refining build scripts, adding linker flags, and improving environment variable management. His work leveraged OCaml, Shell scripting, and package management skills to resolve build failures, simplify dependency chains, and align packaging with evolving macOS and Homebrew requirements, demonstrating strong technical depth.