During their work on the Modalities/modalities repository, Daniel Kaczer focused on resolving a persistent end-to-end test failure in the SFT workflow by refactoring and aligning training and configuration settings. Using Python and YAML, Daniel applied configuration management and testing expertise to standardize the SFT setup across environments, which improved maintainability and reduced setup errors. The fix addressed the root cause of flaky tests, resulting in more reliable continuous integration and faster feedback on SFT changes. Daniel’s approach demonstrated careful debugging and effective collaboration through clear commit practices, contributing depth and stability to the project’s testing and configuration infrastructure.