Worked on the buildkite/agent repository, focusing on backend development and dependency management using Go. Delivered a targeted upgrade of the gopsutil library, updating dependency files to improve build hygiene and maintain compatibility for future releases without altering application code. Addressed artifact reliability by fixing inconsistent Zstandard (.zst) MIME type mapping across platforms, implementing a generator override to ensure application/zstd is used in line with RFC 8878. This change reduced artifact upload failures and support overhead by standardizing MIME type resolution. The work demonstrated attention to cross-platform consistency and careful dependency stewardship, contributing to more reliable CI artifact handling.