During March 2025, the developer delivered foundational domain model scaffolding for the ypech-itescam/POO-2025 repository, focusing on establishing core object-oriented data structures in Java. Their work involved designing and implementing domain objects across several packages to represent real-world entities such as cameras with MicroSD cards, sum calculators, product sales, university structures, and vehicle ownership. Emphasizing maintainable design and scalable relationships, the developer applied principles of object-oriented programming and data structures to lay the groundwork for future features. While no bugs were documented as fixed, the depth of the initial architecture supports business value through extensibility and clear domain modeling.