During May 2025, Daniel contributed to the facebook/buck2 repository by delivering two targeted improvements focused on documentation clarity and Windows performance. He revised the Buck2 documentation to clarify the semantics of the compatible_with field, removing outdated Buck v1 references to reduce confusion for rule authors and streamline onboarding. On the technical side, Daniel enabled mimalloc as the global allocator for Windows builds using Rust, aiming to achieve over twofold speedups on select commands. His work demonstrated skills in documentation governance, system configuration, and performance optimization, resulting in clearer developer guidance and measurable improvements in cross-platform build efficiency and reliability.