diff --git a/codex-rs/tui/src/app/agents_overview.rs b/codex-rs/tui/src/app/agents_overview.rs
index 14faa045b0..8ca06f0463 100644
--- a/codex-rs/tui/src/app/agents_overview.rs
+++ b/codex-rs/tui/src/app/agents_overview.rs
@@ -15,6 +15,8 @@ mod loading;
 #[path = "agents_overview_selection.rs"]
 mod selection;
 
+use super::agents_overview_discovery::is_overview_root;
+use super::agents_overview_discovery::is_visible_in_agents_overview;
 use super::agents_overview_view::AgentsOverviewGroup;
 use super::agents_overview_view::AgentsOverviewRow;
 use super::agents_overview_view::AgentsOverviewView;
@@ -257,11 +259,7 @@ impl App {
                         if displayed_refresh
                             && !self.agents_overview.threads.contains_key(&thread_id)
                             && !self.agents_overview.hidden_threads.contains(&thread_id)
-                            && thread.parent_thread_id.is_none()
-                            && !matches!(
-                                thread.source,
-                                SessionSource::SubAgent(SubAgentSource::ThreadSpawn { .. })
-                            )
+                            && is_overview_root(&thread)
                         {
                             self.agents_overview.refill_count =
                                 self.agents_overview.refill_count.saturating_sub(1);
@@ -423,7 +421,7 @@ impl App {
                 threads.push(target.clone());
             }
         }
-        threads.retain(|thread| !thread.ephemeral);
+        threads.retain(is_visible_in_agents_overview);
         for thread in &mut threads {
             if thread.parent_thread_id.is_none()
                 && let SessionSource::SubAgent(SubAgentSource::ThreadSpawn {
diff --git a/codex-rs/tui/src/app/agents_overview_discovery.rs b/codex-rs/tui/src/app/agents_overview_discovery.rs
index 63e53ec2db..75e35dbcf3 100644
--- a/codex-rs/tui/src/app/agents_overview_discovery.rs
+++ b/codex-rs/tui/src/app/agents_overview_discovery.rs
@@ -74,7 +74,7 @@ pub(crate) async fn list_pinned_threads(
                 Ok(page) => {
                     let next_cursor = page.next_cursor.clone();
                     threads.extend(listed_threads(page).filter(|(thread, _)| {
-                        is_overview_thread(thread) && supports_shared_pinning(&thread.source)
+                        is_overview_root(thread) && supports_shared_pinning(&thread.source)
                     }));
                     let Some(next_cursor) = next_cursor else {
                         break;
@@ -93,8 +93,12 @@ pub(crate) async fn list_pinned_threads(
     Ok(Some(threads))
 }
 
-fn is_overview_thread(thread: &Thread) -> bool {
-    !thread.ephemeral
+pub(super) fn is_visible_in_agents_overview(thread: &Thread) -> bool {
+    !thread.ephemeral && thread.attached_to_thread_id.is_none()
+}
+
+pub(super) fn is_overview_root(thread: &Thread) -> bool {
+    is_visible_in_agents_overview(thread)
         && thread.parent_thread_id.is_none()
         && !matches!(
             thread.source,
@@ -236,7 +240,7 @@ impl SourcePage {
                     self.exhausted = page.next_cursor.is_none();
                     self.cursor = page.next_cursor.clone();
                     self.rows.extend(
-                        listed_threads(page).filter(|(thread, _)| is_overview_thread(thread)),
+                        listed_threads(page).filter(|(thread, _)| is_overview_root(thread)),
                     );
                     return true;
                 }
diff --git a/codex-rs/tui/src/app/agents_overview_tests.rs b/codex-rs/tui/src/app/agents_overview_tests.rs
index 0c521e5fb6..1ea48a6a60 100644
--- a/codex-rs/tui/src/app/agents_overview_tests.rs
+++ b/codex-rs/tui/src/app/agents_overview_tests.rs
@@ -1631,6 +1631,14 @@ async fn shared_overview_shows_only_root_sessions() {
     );
     side.ephemeral = true;
     threads.push(side);
+    let mut attached = overview_thread(
+        ThreadId::new(),
+        /*parent_thread_id*/ None,
+        "Saved side chat",
+        ThreadStatus::Idle,
+    );
+    attached.attached_to_thread_id = Some(first_root.to_string());
+    threads.push(attached);
     let default_model = app
         .model_catalog
         .models
diff --git a/codex-rs/tui/src/app/agents_overview_threads.rs b/codex-rs/tui/src/app/agents_overview_threads.rs
index e4be36118d..0156409db1 100644
--- a/codex-rs/tui/src/app/agents_overview_threads.rs
+++ b/codex-rs/tui/src/app/agents_overview_threads.rs
@@ -5,6 +5,7 @@
 use super::App;
 use super::agents_overview::AGENTS_OVERVIEW_VIEW_ID;
 use super::agents_overview_details::preview_agent_message;
+use super::agents_overview_discovery::is_overview_root;
 use super::agents_overview_discovery::list_pinned_threads;
 use super::app_server_event_targets::ServerNotificationThreadTarget;
 use super::app_server_event_targets::server_notification_thread_target;
@@ -15,7 +16,6 @@ use crate::chatwidget::ChatWidget;
 use codex_app_server_protocol::ClientRequest;
 use codex_app_server_protocol::RequestId;
 use codex_app_server_protocol::ServerNotification;
-use codex_app_server_protocol::SessionSource;
 use codex_app_server_protocol::Thread;
 use codex_app_server_protocol::ThreadItemPayload;
 use codex_app_server_protocol::ThreadLoadedListParams;
@@ -26,7 +26,6 @@ use codex_app_server_protocol::ThreadStatus;
 use codex_app_server_protocol::ThreadTurnsListParams;
 use codex_app_server_protocol::ThreadTurnsListResponse;
 use codex_protocol::ThreadId;
-use codex_protocol::protocol::SubAgentSource;
 use futures::StreamExt;
 use std::collections::HashMap;
 use uuid::Uuid;
@@ -61,12 +60,7 @@ impl App {
         self.agents_overview.removed_threads.insert(thread_id);
         self.agents_overview.unread.remove(&thread_id);
         if let Some(Some(thread)) = self.agents_overview.threads.remove(&thread_id)
-            && !thread.ephemeral
-            && thread.parent_thread_id.is_none()
-            && !matches!(
-                thread.source,
-                SessionSource::SubAgent(SubAgentSource::ThreadSpawn { .. })
-            )
+            && is_overview_root(&thread)
             && !self.agents_overview.hidden_threads.contains(&thread_id)
         {
             self.agents_overview.refill_count += 1;