Worked on compiler infrastructure in the llvm/clangir and moonbitlang/moon repositories, focusing on stability and correctness in C++ and Rust codebases. Improved CIR generation by refining base-class constructor handling during aggregate initialization and added support for empty C++ unions, enhancing code generation reliability and portability. In the moon repository, reinforced error handling for MoonModJSON by introducing validation to prevent panics from empty mod names, along with regression tests to ensure future robustness. Emphasized defensive programming, low-level programming, and comprehensive testing, resulting in safer mod conversions and more resilient compiler workflows across both projects during the two-month period.