Neil Carlson developed a new Fortran writer package for the Fvtkhdf library within the spack/spack-packages repository, focusing on expanding packaging capabilities and ensuring reliable build processes. He utilized CMake for build configuration and leveraged his expertise in Fortran and Python to define dependencies and integrate the package into the existing package management workflow. The work addressed the need for streamlined installation and reproducible builds of the Fvtkhdf library, contributing to the maintainability of the repository. Over the course of the month, Neil concentrated on feature development rather than bug fixes, demonstrating depth in package management and software development practices.