Worked on the coreos/coreos-assembler repository to clarify the behavior of the denylist-stream option within kola/options.go, focusing on improving configuration management and command-line interface usability. The update ensured that when the denylist-stream option is enabled, manifest.yaml is not read and the osversion remains empty for denylist evaluation, resulting in more predictable filtering and safer build manifests. This targeted change enhanced documentation and code alignment, reducing the risk of misconfiguration and easing support efforts. The work was implemented in Go, emphasizing maintainability and onboarding by documenting runtime behavior and supporting more reliable denylist filtering for operators and developers.