Legacy: Realtime

Realtime is now documented in the Core Features: Realtime page.

That page covers the transport choice between WebSockets and SSE, and links forward to the detailed authoring guides.

Use this page as a chooser

If you need…	Go here
Choosing between WebSockets and SSE	Realtime
Bidirectional communication, rooms, presence, recovery, client-to-server events	WebSockets
Server-to-client event streams for browsers	Server-Sent Events
The shared event model behind SSE and other consumers	Events and the Event Bus
Multi-instance delivery and operational scaling	Horizontal Scaling

Recommended order

1. Realtime — choose the transport
2. Events and the Event Bus — understand the event model
3. WebSockets or Server-Sent Events — deep guides
4. Examples — product-shaped references