Lars Eklund modernized the documentation for the UPPMAX/programming_formalisms repository by upgrading the ReadmatSoftware.md diagrams from PlantUML to Mermaid. This transition focused on improving cross-platform rendering compatibility, addressing previous issues with inconsistent diagram display across different viewers. Lars maintained the original diagram semantics and layout integrity by carefully translating the content into Mermaid syntax, ensuring that information fidelity was preserved. The work leveraged skills in diagramming and documentation, using Markdown as the primary language. This targeted feature enhanced the reliability and accessibility of the documentation, reducing support overhead and making the project’s technical materials more robust for diverse users.