Peter Walden led a major architecture refactor for the IsyFact/isyfact-standards repository, focusing on decoupling core modules to enable independent repository management and safer runtime behavior. He restructured dependency management by setting aspectjweaver to runtime scope and removed components such as isy-persistence, isy-polling, and isy-security from the main repository. This Java-based refactoring effort established clearer dependency boundaries, reduced cross-repository coupling, and improved maintainability. Peter documented all breaking changes and outlined a migration plan for downstream teams, laying the foundation for future modular expansion. His work demonstrated depth in Java, repository management, and dependency management practices.