From c62ecd4e17c6d3baac2350fe04ad6be2dfb977f9 Mon Sep 17 00:00:00 2001
From: Charles Cunningham <ccunningham@openai.com>
Date: Fri, 13 Mar 2026 08:09:47 -0700
Subject: [PATCH] Emit collaboration updates for legacy baselines

Co-authored-by: Codex <noreply@openai.com>
---
 codex-rs/core/src/model_visible_fragments.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/codex-rs/core/src/model_visible_fragments.rs b/codex-rs/core/src/model_visible_fragments.rs
index 77717dfe8b..d6c16ff593 100644
--- a/codex-rs/core/src/model_visible_fragments.rs
+++ b/codex-rs/core/src/model_visible_fragments.rs
@@ -278,8 +278,10 @@ impl ModelVisibleContextFragment for CollaborationModeUpdateFragment {
         _params: &TurnContextDiffParams<'_>,
     ) -> Option<Self> {
         if let Some(previous) = reference_context_item {
-            let previous_mode = previous.collaboration_mode.as_ref()?;
-            let previous_text = developer_collaboration_mode_text(previous_mode);
+            let previous_text = previous
+                .collaboration_mode
+                .as_ref()
+                .and_then(developer_collaboration_mode_text);
             let current_text = developer_collaboration_mode_text(&turn_context.collaboration_mode);
             if previous_text == current_text {
                 return None;