Simon Fels developed the LXD Hypervisor Interface for Metadata and Instance Information in the canonical/snapd repository, focusing on secure, socket-based access to per-instance metadata and configuration. Using Go for backend and API development, Simon implemented the devlxd interface to enable communication with the hypervisor via the LXD socket, establishing a default-deny auto-connection policy and exposing relevant sockets to instances. This work aligned with LXD dev-lxd API guidelines and integrated into the core snap, laying the groundwork for automated provisioning and metadata-driven workflows. The solution reduces manual configuration and enhances security for LXD-based deployments, demonstrating depth in backend engineering.