[xenodium]

> It's still not crystal clear to me architecturally is going on

[ Emacs ] <-- JSONRPC (stdin/stdout) -> [ Agent subprocess (headless) ]

> I'd love to know how that is wired to the agents; is that input sent over ACP?

Yes. All traffic goes over ACP between Emacs and the agent. You can inspect the traffic using agent-shell itself.

https://github.com/xenodium/agent-shell?tab=readme-ov-file#h...

> Is that just sending to the shell?

The compose buffer is an UX abstraction on top of the agent shell buffer which is a native Emacs buffer, but ultimately all traffic is sent over ACP.

agent-shell's links to blog posts may be of interest https://github.com/xenodium/agent-shell?tab=readme-ov-file#n...