Worked on the k3s-io/etcd repository to enable secure, local communication by adding Unix Domain Socket support. Developed functionality for the etcd server to accept connections via unix:// and unixs:// schemes, updating configuration validation logic to recognize these new protocols. Implemented an end-to-end test to verify Unix socket connectivity and configuration paths, increasing test coverage and reliability. This work reduced reliance on TCP networking for local etcd interactions, improving deployment flexibility and security. Utilized Go for system and network programming, along with configuration management and testing skills, consolidating all changes in a single feature branch for streamlined review.