Yes, absolutely inspired by herdr. The main reason I built hrdx was that I wanted to explore the idea in Go and shape it around my own workflow. I focused on persistent PTY sessions, workspace and Git branch organization, agent activity indicators, custom agent harnesses, and a socket API for external automation. There is definitely overlap, and I'm not claiming the underlying idea is unique. It is mostly my own take on the same problem.
Yeah, I've got a lot of tooling in Go and have been building some workflows on top of herdr, so a Go version of the same concept is a bit nicer to work with for me. I'll have to play with it a bit more later. Which PTY are you using?