Worked on the open-telemetry/opentelemetry-collector-contrib repository, focusing on enhancing the Prometheus receiver by introducing a feature gate for extra scrape metrics. This addition allowed users to enable richer metrics reporting without altering existing behavior, supporting a smooth transition by deprecating the old configuration and providing clear migration guidance. The implementation was carried out in Go, emphasizing backend development practices and careful regression safety. Tests were updated to validate both the new input stream and the feature gate, ensuring stability. The work aligned with ongoing tracking issues and pull requests, contributing to improved observability with minimal upgrade risk for users.