Developed comprehensive documentation for the open-energy-transition/pypsa-earth repository, focusing on energy systems optimization models. The work introduced a new section detailing capacity expansion and economic dispatch, with clear explanations of deterministic versus stochastic formulations supported by mathematical examples. Using RST and technical writing skills, the documentation aimed to enhance onboarding and user understanding, making complex optimization concepts more accessible. Release notes were updated to reflect these additions, ensuring transparency and reproducibility for users analyzing energy systems. No bugs were addressed during this period, with efforts concentrated on improving documentation quality and supporting faster adoption of pypsa-earth’s optimization features.