During November 2025, Sam Lewis focused on improving documentation within the envoyproxy/envoy repository by clarifying the upper bound constraint for the predictive_preconnect_ratio setting. He updated the API and protobuf documentation to explicitly state the maximum value of 3, ensuring alignment between documentation and code constraints. This change addressed potential misconfigurations that could lead to CDS update failures, thereby supporting more stable deployments and reducing support escalations. Sam’s work centered on API design and documentation, leveraging his expertise with protobuf to enhance user understanding. The update was low-risk, introducing no runtime changes but improving configuration safety and documentation consistency.