I’m actually using xfce4-clipman myself tho (yeah I got that name wrong too, sorry bout that). You can find that from the XFCE project. You should be able to use it as a standalone, without needing to run the XFCE desktop environment, at least it’s packaged that way on Archlinux, which I use. Here’s a webpage for it: Https://docs.xfce.org/panel-plugins/xfce4-clipman-plugin/start. Source: over 2 years ago

Sure you didn't enable "Sync selections" in the clipman settings? Selecting text under x11 always copies it...you can't disable that. But by enabling "Sync selections" you say that the mouse selection buffer and the buffer are the same..thus overwriting every copy as soon as you select something. Source: over 2 years ago

Sounds cool. I would be interested in following this project. It's of particular interest for larger companies and there are vendors like chargeback.com (now part of sift) tackling this but I'm not sure there is a solution for the lower end of market. Source: over 2 years ago