Ciaran Wang developed a PETSc v3.25 compatibility layer for the dealii/dealii repository, focusing on robust integration between the library and the updated PETSc version. He introduced version-specific error handling flags in C++, ensuring that the codebase aligns with PETSc 3.25 requirements and reducing the risk of integration issues for users. The work emphasized maintainability and future-proofing, allowing the project to support new PETSc releases with minimal disruption. Although no major bugs were addressed during this period, Ciaran’s contribution centered on library compatibility and error handling, demonstrating depth in C++ development and careful attention to evolving third-party dependencies.