July 2025 monthly summary for PowerGridModel/power-grid-model: Focused on improving transformer model documentation to ensure users clearly understand the mathematical relationships that drive the model. Key actions: - Clarified transformer model math in the user manual by updating expressions that relate base impedance and admittance to the transformer's rated power and voltage. This directly improves accuracy and reduces ambiguity in model usage. Impact: - Enhanced documentation accuracy and user confidence, enabling faster onboarding and reducing potential support overhead related to transformer calculations. - No major bugs fixed this month; the emphasis was on documentation fidelity and knowledge transfer, positioning the product for smoother adoption and fewer user errors. Key成果/Commit: - Transformer model documentation clarity enhancements (docs(user_manual): updated the expressions of transformer electric model) with commit cd0caa5056ab6013c62de44f0dc983c95240ec55 Technologies/skills demonstrated: - Technical writing and domain-math clarity for transformer models - Version control discipline and traceability via a focused commit - Documentation tooling as a delivery lever for model quality