When the SSE connection drops and reconnects, the client automatically re-validates its cache. Any mutations that fired during the outage are caught up on reconnect.
What to watch for
▶Disconnect, add a todo, then reconnect — the list catches up
▶The timeline shows the sequence of events
▶The actual SSE reconnection is built into the provider — this demo visualizes it
▶In real usage, reconnection is automatic (no button needed)