In November 2024, Jeroen Dekker contributed to the stryker-mutator/stryker-net repository by enhancing the structure of the testing framework documentation. He focused on improving the readability and navigation of testing-framework.md by elevating a section header from H3 to H2, aligning the document with established documentation guidelines. Using Markdown and leveraging his documentation skills, Jeroen ensured the changes supported faster onboarding for both contributors and users. While the update did not involve code changes or bug fixes, it addressed consistency issues highlighted in issue #3093. The work demonstrated attention to detail but was limited in technical depth and scope.