A simple alternative to ssh (<5% total SLOCC) written from scratch in Go. A testbed for candidate PQC (post-quantum cryptography) KEMs (Key-Encapsulation Mechanisms) and symmetric session encryption algorithms. xs also features integrated traffic chaffing to obscure interactive session and file copy activity, and is intended as a playground for other attack-resistance techniques. Runs on Linux, FreeBSD, Windows (client only, MSYS) and Android (within Termux).