During September 2025, this developer focused on refactoring the openmobilemaps/maps-core repository to enhance API accessibility and maintainability. The primary contribution involved moving LineGeometryBuilder.h from an internal directory to a public location, exposing it through the public API without altering its functionality. This careful restructuring improved API boundaries and enabled easier reuse by downstream components, laying the foundation for future API-driven enhancements. The work demonstrated proficiency in C++, public API design, and disciplined version control practices. No bugs were addressed during this period, as the emphasis remained on safe, non-breaking codebase organization and improved integration for external consumers.