Fabian Fröhlich focused on enhancing library compatibility for the ICB-DCM/pyPESTO repository by addressing a critical bug related to JAX 0.6.0 integration. He updated project dependencies and refactored internal Python code to support the pure_callback feature and unpinning, ensuring seamless operation with the latest JAX release. This work required careful dependency management and a deep understanding of both Python and JAX internals. By resolving compatibility issues, Fabian enabled users to leverage new JAX features within pyPESTO, improving stability and reducing onboarding friction. His contribution demonstrated thoroughness in maintaining robust, up-to-date scientific software infrastructure.