Worked on the eclipse-sirius/sirius-web repository to deliver architectural documentation and an Architectural Decision Record for backend-driven diagram layout customization. Focused on establishing a foundation for extensibility by enabling backend-controlled rendering and supporting custom post-processing in diagram layouts. The work involved producing detailed documentation in adoc and Java, outlining the problem, requirements, and proposed solutions, as well as an iteration plan to guide future enhancements while minimizing integration risks. Emphasized architecture and backend development, enhancing repository documentation standards to support maintainability and future feature delivery. No bugs were fixed during this period, as the primary focus was on design groundwork.