This Pathways to Enable Open-Source Ecosystems (POSE) project enables the rapid advancement of computational modeling approaches and their transition to practical applications. Development of computational tools requires collaboration among applied mathematicians and physicists, who develop the models of physical systems; computational scientists, who understand the complexity of programming high performance computing systems; and application engineers, who understand the physics of the engineering system. One of the biggest challenges for computational tool development is the lack of collaboration between these experts. LOCI, a general-purpose framework for developing numerical solvers and computational simulations, encourages collaboration by providing a modular framework where independently developed physical, numerical, or computational models can be integrated seamlessly. The project improves a community-driven open-source ecosystem (OSE) that allows porting of advances from different disciplines into the application with ease. LOCI also enables innovation in the computational engineering discipline through rapid community feedback. In particular, the consortium will help advance Loci-CHEM, a high-speed flow solver widely used for space launch and hypersonic system applications. This POSE project focuses on the development of an open-source ecosystem for the LOCI framework, providing a data-driven paradigm for specifying solver algorithms. LOCI provides an auto-pa