It's crazy how bad Dot has been with stuff like this. You'd think it would be able to (and need to be able to) edit a lot of environment settings, tunnels, plugins, etc., but I keep running into issues. For example, I wanted to make a Codex plugin to give it the ability to steer Codex agents running within my own infrastructure, tunneling in via Tailscale. Ended up just giving up and going with a different approach. Because, for example, every time I'd add a new tool to the plugin, I'd have to manually restart Dot (something that wasn't even obvious that it was possible until you fumble around menu dropdowns) and wait because it can't just refresh tools.
Everything I'm describing is more power user stuff than its most basic use cases ("Do this thing for me with your browser") but all the roadblocks I've run into involve one part of OpenAI's product not being able to talk to the other. I'd imagine Claude Duet is the same.