During March 2026, Stephane Duhamel focused on reliability improvements for the envoyproxy/ai-gateway project, specifically addressing backend integration issues in the MCP Proxy. He resolved persistent 404 errors encountered when routing requests to HTTPS backends by aligning the :scheme pseudo-header with the upstream transport protocol. This fix, implemented in Go and validated within a Google Cloud load balancer-backed environment, ensured that backend listeners correctly matched the protocol expectations of HTTPS services. Stephane’s work leveraged his skills in API and backend development as well as testing, resulting in reduced failed requests and improved compatibility with infrastructure that validates the :scheme header.