During February 2025, Kacper Wysek developed and documented a new paginated lab tests API for the tryVital/docs repository, replacing the legacy /v3/lab_tests endpoint. He focused on API modernization by introducing the /v3/lab_test endpoint, which supports scalable access to large lab datasets. Kacper provided comprehensive migration guidance and deprecation messaging to ensure a smooth transition for users. His work emphasized clear, multi-language API documentation using Markdown, with detailed request and response examples in curl, Python, and JavaScript. The project prioritized developer experience and maintainability, with all efforts centered on feature delivery and documentation rather than bug resolution during this period.