diff --git a/codex-rs/app-server/src/bespoke_event_handling.rs b/codex-rs/app-server/src/bespoke_event_handling.rs
index 55b185e5a8..a06a2cd073 100644
--- a/codex-rs/app-server/src/bespoke_event_handling.rs
+++ b/codex-rs/app-server/src/bespoke_event_handling.rs
@@ -294,17 +294,25 @@ pub(crate) async fn apply_bespoke_event_handling(
                         }),
                     })
                     .collect();
+                let call_id = request.call_id.clone();
                 let params = ToolRequestUserInputParams {
                     thread_id: conversation_id.to_string(),
                     turn_id: request.turn_id,
-                    item_id: request.call_id,
+                    item_id: call_id.clone(),
                     questions,
                 };
                 let rx = outgoing
                     .send_request(ServerRequestPayload::ToolRequestUserInput(params))
                     .await;
+                let response_call_id = call_id.clone();
                 tokio::spawn(async move {
-                    on_request_user_input_response(event_turn_id, rx, conversation).await;
+                    on_request_user_input_response(
+                        event_turn_id,
+                        response_call_id,
+                        rx,
+                        conversation,
+                    )
+                    .await;
                 });
             } else {
                 error!(
@@ -317,6 +325,7 @@ pub(crate) async fn apply_bespoke_event_handling(
                 if let Err(err) = conversation
                     .submit(Op::UserInputAnswer {
                         id: event_turn_id,
+                        call_id: Some(request.call_id.clone()),
                         response: empty,
                     })
                     .await
@@ -1483,6 +1492,7 @@ async fn on_exec_approval_response(
 
 async fn on_request_user_input_response(
     event_turn_id: String,
+    call_id: String,
     receiver: oneshot::Receiver<JsonValue>,
     conversation: Arc<CodexThread>,
 ) {
@@ -1497,6 +1507,7 @@ async fn on_request_user_input_response(
             if let Err(err) = conversation
                 .submit(Op::UserInputAnswer {
                     id: event_turn_id,
+                    call_id: Some(call_id.clone()),
                     response: empty,
                 })
                 .await
@@ -1532,6 +1543,7 @@ async fn on_request_user_input_response(
     if let Err(err) = conversation
         .submit(Op::UserInputAnswer {
             id: event_turn_id,
+            call_id: Some(call_id),
             response,
         })
         .await
diff --git a/codex-rs/core/src/codex.rs b/codex-rs/core/src/codex.rs
index 117fb9ec66..c3850e32b7 100644
--- a/codex-rs/core/src/codex.rs
+++ b/codex-rs/core/src/codex.rs
@@ -3143,27 +3143,29 @@ mod handlers {
 
         // Replace with the raw items. We don't want to replace with a normalized
         // version of the history.
-        let user_turns = Self::user_turn_count(history.raw_items());
+        let user_turns = Session::user_turn_count(history.raw_items());
         sess.replace_history(history.raw_items().to_vec()).await;
-        let mut state = sess.state.lock().await;
-        let mut updated_turn_context_history = existing_turn_context_history;
-        let truncated_len = updated_turn_context_history
-            .len()
-            .saturating_sub(num_turns as usize);
-        updated_turn_context_history.truncate(truncated_len);
-        if updated_turn_context_history.len() < user_turns {
-            updated_turn_context_history.resize_with(user_turns, || None);
-        }
-        state.set_turn_context_history(updated_turn_context_history);
-        let mut applied = false;
-        if state.turn_context_history.len() == user_turns
-            && let Some(turn_context) = state.last_turn_context()
-            && let Some(collaboration_mode) = turn_context.collaboration_mode.clone()
         {
-            state.session_configuration.collaboration_mode = collaboration_mode;
-            applied = true;
+            let mut state = sess.state.lock().await;
+            let mut updated_turn_context_history = existing_turn_context_history;
+            let truncated_len = updated_turn_context_history
+                .len()
+                .saturating_sub(num_turns as usize);
+            updated_turn_context_history.truncate(truncated_len);
+            if updated_turn_context_history.len() < user_turns {
+                updated_turn_context_history.resize_with(user_turns, || None);
+            }
+            state.set_turn_context_history(updated_turn_context_history);
+            let mut applied = false;
+            if state.turn_context_history.len() == user_turns
+                && let Some(turn_context) = state.last_turn_context()
+                && let Some(collaboration_mode) = turn_context.collaboration_mode.clone()
+            {
+                state.session_configuration.collaboration_mode = collaboration_mode;
+                applied = true;
+            }
+            state.force_collaboration_instructions = !applied;
         }
-        state.force_collaboration_instructions = !applied;
         sess.recompute_token_usage(turn_context.as_ref()).await;
 
         sess.send_event_raw_flushed(Event {
diff --git a/codex-rs/core/tests/suite/request_user_input.rs b/codex-rs/core/tests/suite/request_user_input.rs
index 89a5ed3557..4ba7502948 100644
--- a/codex-rs/core/tests/suite/request_user_input.rs
+++ b/codex-rs/core/tests/suite/request_user_input.rs
@@ -165,6 +165,7 @@ async fn request_user_input_round_trip_resolves_pending() -> anyhow::Result<()>
     codex
         .submit(Op::UserInputAnswer {
             id: request.turn_id.clone(),
+            call_id: Some(request.call_id.clone()),
             response,
         })
         .await?;
diff --git a/codex-rs/docs/protocol_v1.md b/codex-rs/docs/protocol_v1.md
index 8f68ecc9a6..803119604e 100644
--- a/codex-rs/docs/protocol_v1.md
+++ b/codex-rs/docs/protocol_v1.md
@@ -69,7 +69,7 @@ For complete documentation of the `Op` and `EventMsg` variants, refer to [protoc
   - `Op::UserInput` – Legacy form of user input
   - `Op::Interrupt` – Interrupts a running turn
   - `Op::ExecApproval` – Approve or deny code execution
-  - `Op::UserInputAnswer` – Provide answers for a `request_user_input` tool call
+  - `Op::UserInputAnswer` – Provide answers for a `request_user_input` tool call (optionally include `call_id`)
   - `Op::ListSkills` – Request skills for one or more cwd values (optionally `force_reload`)
   - `Op::UserTurn` and `Op::OverrideTurnContext` accept an optional `personality` override that updates the model’s communication style
 - `EventMsg`