diff --git a/codex-rs/tui/src/chatwidget.rs b/codex-rs/tui/src/chatwidget.rs
index 129e8c2667..46663655ce 100644
--- a/codex-rs/tui/src/chatwidget.rs
+++ b/codex-rs/tui/src/chatwidget.rs
@@ -24,6 +24,7 @@ use codex_core::protocol::AgentReasoningRawContentDeltaEvent;
 use codex_core::protocol::AgentReasoningRawContentEvent;
 use codex_core::protocol::ApplyPatchApprovalRequestEvent;
 use codex_core::protocol::BackgroundEventEvent;
+use codex_core::protocol::CollabInteractionEvent;
 use codex_core::protocol::CreditsSnapshot;
 use codex_core::protocol::DeprecationNoticeEvent;
 use codex_core::protocol::ErrorEvent;
@@ -102,6 +103,7 @@ use crate::bottom_pane::SelectionViewParams;
 use crate::bottom_pane::custom_prompt_view::CustomPromptView;
 use crate::bottom_pane::popup_consts::standard_popup_hint_line;
 use crate::clipboard_paste::paste_image_to_temp_png;
+use crate::collab_event_cell;
 use crate::diff_render::display_path_for;
 use crate::exec_cell::CommandOutput;
 use crate::exec_cell::ExecCell;
@@ -1073,6 +1075,11 @@ impl ChatWidget {
         self.set_status_header(message);
     }
 
+    fn on_collab_interaction(&mut self, event: CollabInteractionEvent) {
+        self.add_to_history(collab_event_cell::new_collab_interaction(event));
+        self.request_redraw();
+    }
+
     fn on_undo_started(&mut self, event: UndoStartedEvent) {
         self.bottom_pane.ensure_status_indicator();
         self.bottom_pane.set_interrupt_hint_visible(false);
@@ -2182,9 +2189,7 @@ impl ChatWidget {
             }
             EventMsg::ExitedReviewMode(review) => self.on_exited_review_mode(review),
             EventMsg::ContextCompacted(_) => self.on_agent_message("Context compacted".to_owned()),
-            EventMsg::CollabInteraction(_) => {
-                // TODO(jif) handle collab tools.
-            }
+            EventMsg::CollabInteraction(event) => self.on_collab_interaction(event),
             EventMsg::ThreadRolledBack(_) => {}
             EventMsg::RawResponseItem(_)
             | EventMsg::ItemStarted(_)
diff --git a/codex-rs/tui/src/collab_event_cell.rs b/codex-rs/tui/src/collab_event_cell.rs
new file mode 100644
index 0000000000..6d577e1768
--- /dev/null
+++ b/codex-rs/tui/src/collab_event_cell.rs
@@ -0,0 +1,140 @@
+use codex_core::protocol::AgentStatus;
+use codex_core::protocol::CollabInteractionEvent;
+use ratatui::style::Stylize;
+use ratatui::text::Line;
+
+use crate::history_cell::HistoryCell;
+use crate::text_formatting::truncate_text;
+use crate::wrapping::RtOptions;
+use crate::wrapping::word_wrap_lines;
+
+const COLLAB_PROMPT_MAX_GRAPHEMES: usize = 120;
+
+#[derive(Debug)]
+pub(crate) struct CollabInteractionCell {
+    summary: Line<'static>,
+    detail: Option<Line<'static>>,
+}
+
+impl CollabInteractionCell {
+    fn new(summary: Line<'static>, detail: Option<Line<'static>>) -> Self {
+        Self { summary, detail }
+    }
+}
+
+impl HistoryCell for CollabInteractionCell {
+    fn display_lines(&self, width: u16) -> Vec<Line<'static>> {
+        let wrap_width = width.max(1) as usize;
+        let mut lines = word_wrap_lines(
+            std::iter::once(self.summary.clone()),
+            RtOptions::new(wrap_width)
+                .initial_indent("• ".dim().into())
+                .subsequent_indent("  ".into()),
+        );
+
+        if let Some(detail) = &self.detail {
+            let detail_lines = word_wrap_lines(
+                std::iter::once(detail.clone()),
+                RtOptions::new(wrap_width)
+                    .initial_indent("  └ ".dim().into())
+                    .subsequent_indent("    ".into()),
+            );
+            lines.extend(detail_lines);
+        }
+
+        lines
+    }
+}
+
+fn collab_status_label(status: &AgentStatus) -> String {
+    match status {
+        AgentStatus::PendingInit => "pending init".to_string(),
+        AgentStatus::Running => "running".to_string(),
+        AgentStatus::Completed(message) => format!("completed: {message:?}"),
+        AgentStatus::Errored(_) => "errored".to_string(),
+        AgentStatus::Shutdown => "shutdown".to_string(),
+        AgentStatus::NotFound => "not found".to_string(),
+    }
+}
+
+fn collab_detail_line(label: &str, message: &str) -> Option<Line<'static>> {
+    let trimmed = message.trim();
+    if trimmed.is_empty() {
+        return None;
+    }
+
+    let collapsed = trimmed
+        .lines()
+        .map(str::trim)
+        .filter(|line| !line.is_empty())
+        .collect::<Vec<_>>()
+        .join(" ");
+    let truncated = truncate_text(&collapsed, COLLAB_PROMPT_MAX_GRAPHEMES);
+    let label = format!("{label}: ");
+    Some(Line::from(vec![label.dim(), truncated.into()]))
+}
+
+pub(crate) fn new_collab_interaction(event: CollabInteractionEvent) -> CollabInteractionCell {
+    let (summary, detail) = match event {
+        CollabInteractionEvent::AgentSpawned { new_id, prompt, .. } => {
+            let summary = Line::from(vec![
+                "Spawned agent".bold(),
+                " ".into(),
+                new_id.to_string().dim(),
+            ]);
+            let detail = collab_detail_line("Prompt", &prompt);
+            (summary, detail)
+        }
+        CollabInteractionEvent::AgentInteraction {
+            receiver_id,
+            prompt,
+            ..
+        } => {
+            let summary = Line::from(vec![
+                "Sent to agent".bold(),
+                " ".into(),
+                receiver_id.to_string().dim(),
+            ]);
+            let detail = collab_detail_line("Message", &prompt);
+            (summary, detail)
+        }
+        CollabInteractionEvent::WaitingBegin { receiver_id, .. } => {
+            let summary = Line::from(vec![
+                "Waiting on agent".bold(),
+                " ".into(),
+                receiver_id.to_string().dim(),
+            ]);
+            (summary, None)
+        }
+        CollabInteractionEvent::WaitingEnd {
+            receiver_id,
+            status,
+            ..
+        } => {
+            let summary = Line::from(vec![
+                "Wait ended for agent".bold(),
+                " ".into(),
+                receiver_id.to_string().dim(),
+                " · ".dim(),
+                collab_status_label(&status).dim(),
+            ]);
+            (summary, None)
+        }
+        CollabInteractionEvent::Close {
+            receiver_id,
+            status,
+            ..
+        } => {
+            let summary = Line::from(vec![
+                "Closed agent".bold(),
+                " ".into(),
+                receiver_id.to_string().dim(),
+                " · ".dim(),
+                collab_status_label(&status).dim(),
+            ]);
+            (summary, None)
+        }
+    };
+
+    CollabInteractionCell::new(summary, detail)
+}
diff --git a/codex-rs/tui/src/lib.rs b/codex-rs/tui/src/lib.rs
index 0f38c5ee74..76bb8fb926 100644
--- a/codex-rs/tui/src/lib.rs
+++ b/codex-rs/tui/src/lib.rs
@@ -43,6 +43,7 @@ mod bottom_pane;
 mod chatwidget;
 mod cli;
 mod clipboard_paste;
+mod collab_event_cell;
 mod color;
 pub mod custom_terminal;
 mod diff_render;