Pierre Gellet contributed to the heig-vd-dai-course/heig-vd-dai-course repository by updating the CONTRIBUTORS section in the README.md file to include his name, focusing on documentation accuracy and contributor recognition. He used Markdown for clear formatting and leveraged Git for disciplined version control, ensuring that the change was traceable through a well-referenced commit message. This documentation-focused update did not affect build or runtime stability, preserving the integrity of the project. By enhancing transparency and onboarding for new contributors, Pierre demonstrated attention to detail in documentation practices and effective use of collaborative tools, though the scope of work was limited to a single feature.