Send events to realtime api (#12423)

- Send assistant messages, ExecCommandBegin, and
PatchApplyBegin/PatchApplyEnd

codex-rs/core/tests/suite/realtime_conversation.rs

@@ -9,6 +9,8 @@ use codex_protocol::protocol::Op;
 use codex_protocol::protocol::RealtimeAudioFrame;
 use codex_protocol::protocol::RealtimeConversationRealtimeEvent;
 use codex_protocol::protocol::RealtimeEvent;
+use core_test_support::responses;
+use core_test_support::responses::start_mock_server;
 use core_test_support::responses::start_websocket_server;
 use core_test_support::skip_if_no_network;
 use core_test_support::test_codex::test_codex;
@@ -459,3 +461,82 @@ async fn conversation_uses_experimental_realtime_ws_backend_prompt_override() ->
     server.shutdown().await;
     Ok(())
 }
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn conversation_mirrors_assistant_message_text_to_realtime_websocket() -> Result<()> {
+    skip_if_no_network!(Ok(()));
+
+    let api_server = start_mock_server().await;
+    let _response_mock = responses::mount_sse_once(
+        &api_server,
+        responses::sse(vec![
+            responses::ev_response_created("resp_1"),
+            responses::ev_assistant_message("msg_1", "assistant says hi"),
+            responses::ev_completed("resp_1"),
+        ]),
+    )
+    .await;
+
+    let realtime_server = start_websocket_server(vec![vec![
+        vec![json!({
+            "type": "session.created",
+            "session": { "id": "sess_1" }
+        })],
+        vec![],
+    ]])
+    .await;
+
+    let mut builder = test_codex().with_config({
+        let realtime_base_url = realtime_server.uri().to_string();
+        move |config| {
+            config.experimental_realtime_ws_base_url = Some(realtime_base_url);
+        }
+    });
+    let test = builder.build(&api_server).await?;
+
+    test.codex
+        .submit(Op::RealtimeConversationStart(ConversationStartParams {
+            prompt: "backend prompt".to_string(),
+            session_id: None,
+        }))
+        .await?;
+
+    let session_created = wait_for_event_match(&test.codex, |msg| match msg {
+        EventMsg::RealtimeConversationRealtime(RealtimeConversationRealtimeEvent {
+            payload: RealtimeEvent::SessionCreated { session_id },
+        }) => Some(session_id.clone()),
+        _ => None,
+    })
+    .await;
+    assert_eq!(session_created, "sess_1");
+
+    test.submit_turn("hello").await?;
+
+    let deadline = tokio::time::Instant::now() + Duration::from_secs(2);
+    while tokio::time::Instant::now() < deadline {
+        let connections = realtime_server.connections();
+        if connections.len() == 1 && connections[0].len() >= 2 {
+            break;
+        }
+        tokio::time::sleep(Duration::from_millis(10)).await;
+    }
+
+    let realtime_connections = realtime_server.connections();
+    assert_eq!(realtime_connections.len(), 1);
+    assert_eq!(realtime_connections[0].len(), 2);
+    assert_eq!(
+        realtime_connections[0][0].body_json()["type"].as_str(),
+        Some("session.create")
+    );
+    assert_eq!(
+        realtime_connections[0][1].body_json()["type"].as_str(),
+        Some("conversation.item.create")
+    );
+    assert_eq!(
+        realtime_connections[0][1].body_json()["item"]["content"][0]["text"].as_str(),
+        Some("assistant says hi")
+    );
+
+    realtime_server.shutdown().await;
+    Ok(())
+}