During January 2025, Nero focused on improving debugging reliability in the espressif/llvm-project repository by addressing an issue with novtable classes in clang-cl. He implemented a targeted fix in C++ and LLVM IR, ensuring that the full definition of RecordDecl is included in debug information rather than just a forward declaration. This change restored complete debugging capabilities for classes using the novtable attribute, particularly benefiting Windows-based development workflows. Nero also added a regression test to safeguard against future regressions. His work demonstrated depth in compiler development and debugging, directly reducing post-release troubleshooting time for developers working with LLVM.