Guillermo focused on maintaining upgrade readiness documentation for the Plomin upgrade, specifically updating the DApp integrations list within the IntersectMBO/hf-wg-documentation repository. He delivered a targeted feature by adding Book.io and Stuff.io to the Plomin readiness page, ensuring the documentation accurately reflected the latest project integrations. Using Markdown and leveraging disciplined documentation practices, Guillermo maintained rigorous change traceability through clear commit messages. His work improved stakeholder visibility and onboarding readiness by keeping technical records synchronized with ongoing development. The scope of work was focused and precise, demonstrating depth in documentation skills and attention to detail rather than broad engineering changes.