Why it matters

WebSockets enable rich agent UIs. Understanding shapes real-time.

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The architecture

WS connection.

Client sends events.

Server streams responses.

Multiplex per session.

WebSocket agent stackWS handshakeupgrade HTTPMessage framestext / binarySession stateserver-sideSpring WebSocket + STOMP or plain frames; consider Netty for scale
WebSocket.
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How it works end to end

Spring WebSocket API.

STOMP messaging optional.

Session per connection.

Heartbeat + reconnect.