Edits were refused when the user's LTspice window had unsaved changes, and the reply told the user to press Ctrl+S by hand. Now the agent asks, and on yes the server sends LTspice's Save to that window, returns the new sha256 and rereads the sheet before editing. When two windows hold different unsaved copies it saves nothing and the user picks. Good handling, and a clear picture of how messy agent plus human on one file gets.