[kgeist]

>surprising amount of work

Dunno, in my Go+HTMX project, it was pretty trivial to add SSE streaming. When you open a new chat tab, we load existing data from the DB and then HTMX initiates SSE streaming with a single tag. When the server receives a SSE request from HTMX, it registers a goroutine and a new Go channel for this tab. The goroutine blocks and waits for new events in the channel. When something triggers a new message, there's a dispatcher which saves the event to the DB and then iterates over registered Go channels and sends the event to it. On a new event in the tab's channel, the tab's goroutine unblocks and passes the event from the channel to the SSE stream. HTMX handles inserting new data to the DOM. When a tab closes, the goroutine receives the notification via the request's context (another Go primitive), deregisters the channel and exits. If the server restarts, HTMX automatically reopens the SSE stream. It took probably one evening to implement.