Oschaaf upgraded the HDR_HISTOGRAM_C library to version 0.11.8 in the envoyproxy/nighthawk repository, focusing on build system configuration and dependency management. The work involved updating file paths and include directives within the build scripts to ensure compatibility with the new library version, leveraging both C++ and Starlark for precise integration. By delivering this targeted feature, Oschaaf enabled the project to benefit from the latest library improvements and bug fixes without introducing regressions. The changes were encapsulated in a single, verifiable commit, reflecting a focused engineering approach and a clear understanding of build tooling and dependency workflows.