Daniel Kyte Zable enhanced the Reactant extension in the CliMA/Oceananigans.jl repository by expanding its numerical method capabilities. He implemented FFT planning support for ConcreteRArray, enabling more efficient and flexible solver operations for reactant simulations. Additionally, Daniel introduced RK3 time-stepping, which improved the accuracy and stability of numerical integration within the extension. His work involved rigorous testing to validate these new features and ensure robust performance. Leveraging his expertise in Julia, scientific computing, and numerical methods, Daniel focused on both performance and reliability, delivering targeted improvements that addressed the evolving needs of the project without introducing new bugs.