How to send a file to an open helix session

[hgibs]

I have helix open in one terminal tab and am navigating files in another. Is it possible to, in that separate tab, send a file path to helix? A command like hx --use-existing-session some/file.txt or echo $PWD/file.txt > /proc/[hx PID]/fd/0

Right now the only option is to copy the path and then paste it into helix with :o [paste], but having the ability to send file paths to an existing helix instance would not only make life easier for the use case I describe, but it would also open up the possibilities of other external connections, like issuing a buffer reload on a git switch or more.

It doesn't look like something like this exists, to what I could find. I saw some discussion of an RPC feature, but that was mainly from helix to something else. I was thinking perhaps a local socket or adding notify (in linux at least) support. Curious about the community's thoughts. Thanks!