Comment by verdverm

This is not so unlike the coding agent I'm building for vs code. One of the things I'm doing is keeping a snapshot of the current vs code state (files open, terminal history, etc) in the agent server. Similarly, I track the file changes without actually writing them until the user approves the diff, so there are some "filesystem" like things that need to be carefully managed on each side.

tl;dr, Both sides are broadcasting messages and listening for the ones they care about.