rio does its magic (<ins> expanding filenames) by consulting /dev/wdir, thus any way you can keep wdir up to date will allow <ins> to work, (and the plumber to find files).
You can even use u9fs (or sftpfs) to connect to a unix box and ssh to connect to a remote unix host, and plumb files (or use <ins> to expand file names), this parses the current directory embedded in the unix host's prompt - see rwd(1). I have a similar system for accessing windows servers and windows workstations, though I use my own server on the workstation rather than openssh. -Steve
