Paul Volavšek updated the fiskaltrust/interface-doc repository by enhancing its documentation to use local image files for communication protocol samples. This change replaced external image references with locally managed assets, improving both visual consistency and offline accessibility for contributors. Paul applied technical writing and documentation best practices, utilizing Markdown to ensure clarity and maintainability. The update reduced external dependencies, making onboarding easier and enabling reliable offline previews. While the work focused on a single feature over one month, it demonstrated careful asset management and version control traceability. The depth of the contribution lay in improving documentation workflows rather than codebase complexity.