fix: do not show closed agents in /agent (#11175)

codex-rs/tui/src/app.rs

@@ -771,7 +771,14 @@ impl App {
         Ok(())
     }
 
-    fn open_agent_picker(&mut self) {
+    async fn open_agent_picker(&mut self) {
+        let thread_ids: Vec<ThreadId> = self.thread_event_channels.keys().cloned().collect();
+        for thread_id in thread_ids {
+            if self.server.get_thread(thread_id).await.is_err() {
+                self.thread_event_channels.remove(&thread_id);
+            }
+        }
+
         if self.thread_event_channels.is_empty() {
             self.chat_widget
                 .add_info_message("No agents available yet.".to_string(), None);
@@ -2160,7 +2167,7 @@ impl App {
                 self.chat_widget.open_approvals_popup();
             }
             AppEvent::OpenAgentPicker => {
-                self.open_agent_picker();
+                self.open_agent_picker().await;
             }
             AppEvent::SelectAgentThread(thread_id) => {
                 self.select_agent_thread(tui, thread_id).await?;
@@ -2686,6 +2693,19 @@ mod tests {
         Ok(())
     }
 
+    #[tokio::test]
+    async fn open_agent_picker_prunes_missing_threads() -> Result<()> {
+        let mut app = make_test_app().await;
+        let thread_id = ThreadId::new();
+        app.thread_event_channels
+            .insert(thread_id, ThreadEventChannel::new(1));
+
+        app.open_agent_picker().await;
+
+        assert_eq!(app.thread_event_channels.contains_key(&thread_id), false);
+        Ok(())
+    }
+
     async fn make_test_app() -> App {
         let (chat_widget, app_event_tx, _rx, _op_rx) = make_chatwidget_manual_with_sender().await;
         let config = chat_widget.config_ref().clone();