diff --git a/codex-rs/core/src/codex.rs b/codex-rs/core/src/codex.rs
index 8adc2b3858..2a5a7d0203 100644
--- a/codex-rs/core/src/codex.rs
+++ b/codex-rs/core/src/codex.rs
@@ -750,6 +750,11 @@ impl Session {
         }
     }
 
+    pub(crate) async fn history_snapshot(&self) -> Vec<ResponseItem> {
+        let state = self.state.lock().await;
+        state.history_snapshot()
+    }
+
     async fn update_token_usage_info(
         &self,
         sub_id: &str,
diff --git a/codex-rs/core/src/codex/compact.rs b/codex-rs/core/src/codex/compact.rs
index 88e8a8f433..8d20ccf4bb 100644
--- a/codex-rs/core/src/codex/compact.rs
+++ b/codex-rs/core/src/codex/compact.rs
@@ -151,10 +151,7 @@ async fn run_compact_task_inner(
     if remove_task_on_completion {
         sess.remove_task(&sub_id).await;
     }
-    let history_snapshot = {
-        let state = sess.state.lock().await;
-        state.history_snapshot()
-    };
+    let history_snapshot = sess.history_snapshot().await;
     let summary_text = get_last_assistant_message_from_turn(&history_snapshot).unwrap_or_default();
     let user_messages = collect_user_messages(&history_snapshot);
     let initial_context = sess.build_initial_context(turn_context.as_ref());