During December 2025, Gregorio Ruiz developed comprehensive documentation for the i12vecaj/psp-25-26 repository, focusing on consolidating programming concepts from the first trimester. He authored the Programming Concepts Summary, which integrates Java basics, multi-threading, and networking, providing both practical examples and theoretical context. By emphasizing clarity and maintainability, Gregorio ensured the documentation supports onboarding and curriculum alignment, making it a valuable reference for learners and reviewers. His work, primarily in Java and Markdown, addressed the need for structured knowledge transfer and assessment readiness. No bugs were reported, reflecting a focus on depth and quality in documentation rather than code changes.