Rongrong focused on enhancing stability and reliability in the golang/go repository by addressing two nuanced bugs in the Go compiler. Leveraging expertise in Go and compiler design, Rongrong improved test hygiene by skipping MIPSLE tests on unsupported 32-bit architectures, which reduced CI noise and aligned testing with platform support. Additionally, Rongrong fixed a subtle sign-extension issue in the SSA rewrite path, ensuring correct handling of AuxInt values and preventing internal compiler errors across architectures. The work demonstrated careful attention to cross-architecture correctness and code quality, with changes thoroughly reviewed and validated to support robust, maintainable builds and testing workflows.