In vanilla neovim you can use autoread... this does depend on a focus event like entering and leaving the pane or switching buffers. However, for my workflow which is "go to a different terminal pane and do some things then switch back" as soon as I focus the buffer it updates.
Where as with Zed it'll just keep showing the old content and in fact closing and opening file wont even change what it shows in Zed. It's really really annoying. I have to exit zed and open it again. This means if you are working with AI agents you end up having to do this often.
I generally like what Zed is trying to become. However, all of these features and blog posts are frustraing when they struggle to keep basic editor features stable. Edit a file outside of the editor? It's not going to show up in the project pane or the git diff. Need to work inside a container because it's 2025 and we don't need to clutter our local machine with 100s of dependencies and env managers... well now all the AI stuff is broken. ACP sounds cool until you realize every single CLI in existence works better.
My wish is that Zed gets the core working correctly 100% of the time before moving on to expanding feature sets. For now I'm back in NeoVIM because it always works the first time....
There used to be tons of these and even turn key libraries that do all of this and much much more. Especially in the early to mid 00s. Did you do any research into them before you built this?