Benji Vos developed a dSYM generation feature for C++ binaries in the bazelbuild/apple_support repository, focusing on improving post-build debugging for Apple-native projects. He introduced an opt-in flag that enables the creation of .dSYM symbol files, updating the wrapped_clang integration to generate these files and ensure proper stripping of linked binaries. The work involved extending presubmit configurations to add targeted tests for the new functionality, leveraging skills in build systems, compiler toolchains, and debugging symbols. This addition enhanced the debugging experience for developers and improved CI coverage, reflecting a focused and technically sound approach within a short timeframe.