Daegon worked on enhancing the build system for the EsotericSoftware/spine-runtimes repository, focusing on cross-platform reliability and user configurability. He introduced an opt-in CMake option that allows users to control whether compiler flags are set, enabling environment-specific build customization and reducing friction in diverse CI pipelines. By addressing a syntax issue in the CMake configuration, he ensured that compiler flags are processed correctly when the new option is enabled. Daegon’s work demonstrated proficiency in build system configuration and CMake scripting, resulting in a more portable and maintainable build process that supports a wide range of development environments.