Shashank Roy developed foundational project documentation for the 4DVarNet reimplementation in JAX, focusing on project planning and cross-framework evaluation. Working within the Diff4Earth/ige-jaxathon-2025 repository, he authored a comprehensive Markdown document that outlined objectives, personnel, deliverables, and measurable success criteria for comparing JAX and PyTorch implementations. His approach emphasized early team alignment and established a single source of truth to streamline onboarding and collaboration. By defining metrics for accuracy, speed, and memory, Shashank enabled structured evaluation of future engineering work. The depth of his contribution lay in thorough documentation and clear project planning using Markdown and collaborative workflows.