The Mopo project aims to develop an innovative energy system modelling toolset for sustainable and resilient planning. It combines data production, scenario management, and sector-specific optimization, based on existing tools like Spine Toolbox and SpineOpt. Mopo will provide an open-access, high-resolution Pan-European dataset for adaptable energy planning. The modular design ensures wide applicability across various energy planning contexts, aiming for substantial sector-wide adoption within two years after completion.