Vadim Bertrand developed a comprehensive project planning artifact for the Diff4Earth/ige-jaxathon-2025 repository, focusing on the Pastax Global Calibration initiative. He authored a detailed Markdown document that formalized the calibration workflow for stochastic trajectory simulators, outlining team roles, project scope, metrics, tooling, and success criteria. Leveraging skills in documentation and project planning, Vadim consolidated all relevant planning materials into a single, version-controlled resource to streamline onboarding and governance. While no bugs were addressed during this period, the work provided a reusable blueprint for future calibration efforts, demonstrating depth in structuring complex technical processes and supporting collaborative project alignment.