During a two-month period, Fang Han contributed to the vllm-project by delivering three production features focused on deployment security, observability, and backend interoperability. In the production-stack repository, Fang Han implemented imagePullSecrets integration for router and cache-server deployments using Helm and Kubernetes, enabling secure access to private container registries and reducing manual credential management. Additionally, Fang Han enhanced distributed tracing by adding OpenTelemetry support with W3C context propagation in the router, improving diagnostics across services. In the semantic-router repository, Fang Han integrated the Anthropic Claude backend using Go and Python, broadening client compatibility by supporting Anthropic-formatted requests and OpenAI-compatible responses.