diff --git a/crates/colibri-glasspane-tui/src/main.rs b/crates/colibri-glasspane-tui/src/main.rs
index 73b4c9f..f427b6a 100644
--- a/crates/colibri-glasspane-tui/src/main.rs
+++ b/crates/colibri-glasspane-tui/src/main.rs
@@ -1209,6 +1209,54 @@ mod tests {
         assert_eq!(filtered[1].id, "pane-blocked");
     }
 
+    #[test]
+    fn attention_filter_toggle_roundtrip_restores_full_view() {
+        // attention filter ON then OFF should restore exactly the same view.
+        let snap = GlasspaneSnapshot::new(
+            "osa",
+            "2026-06-25T12:00:00Z",
+            vec![
+                colibri_glasspane::Pane {
+                    id: "pane-ok".into(),
+                    agent: "zot".into(),
+                    state: AgentState::Working,
+                    session_id: Some("s1".into()),
+                    last_event_at: None,
+                    cwd: None,
+                    stalled: false,
+                },
+                colibri_glasspane::Pane {
+                    id: "pane-err".into(),
+                    agent: "zot".into(),
+                    state: AgentState::Error,
+                    session_id: Some("s1".into()),
+                    last_event_at: None,
+                    cwd: None,
+                    stalled: false,
+                },
+            ],
+        );
+        let mut app = App::new(PathBuf::from("/tmp/nonexistent.sock"));
+        app.snapshot = Some(snap);
+        app.rebuild_session_list();
+
+        let before: Vec<String> = app.filtered_panes().iter().map(|p| p.id.clone()).collect();
+
+        // Toggle ON
+        app.attention_only = true;
+        let filtered = app.filtered_panes();
+        assert_eq!(filtered.len(), 1);
+        assert_eq!(filtered[0].id, "pane-err");
+
+        // Toggle OFF — must restore the full view exactly
+        app.attention_only = false;
+        let after: Vec<String> = app.filtered_panes().iter().map(|p| p.id.clone()).collect();
+        assert_eq!(
+            before, after,
+            "toggling attention filter off must restore the full pane list"
+        );
+    }
+
     #[test]
     fn attention_bar_does_not_render_when_all_healthy() {
         let snap = GlasspaneSnapshot::new(