diff --git a/codex-rs/core/src/codex.rs b/codex-rs/core/src/codex.rs
index 89fcbc760c..e75a2de2ad 100644
--- a/codex-rs/core/src/codex.rs
+++ b/codex-rs/core/src/codex.rs
@@ -1004,9 +1004,7 @@ impl Session {
             guard.clone()
         };
         if let Some(turn_state) = current_turn {
-            turn_state
-                .enqueue_user_input(input.clone(), readiness.clone())
-                .await;
+            turn_state.enqueue_user_input(input, readiness).await;
             Ok(())
         } else {
             Err((input, readiness))
@@ -1026,20 +1024,17 @@ impl Session {
 
     pub async fn interrupt_task(&self) {
         info!("interrupt received: abort current task, if any");
-        {
-            let mut state = self.state.lock().await;
-            state.pending_approvals.clear();
-        }
+
+        let mut state = self.state.lock().await;
+        state.pending_approvals.clear();
 
         let task = {
             let mut current_task = self.current_task.lock().await;
             current_task.take()
         };
 
-        {
-            let mut current_turn = self.current_turn.lock().await;
-            current_turn.take();
-        }
+        let mut current_turn = self.current_turn.lock().await;
+        current_turn.take();
 
         if let Some(task) = task {
             task.abort(TurnAbortReason::Interrupted);
@@ -1710,7 +1705,7 @@ async fn run_task(sess: Arc<Session>, turn_state: Arc<TurnState>) {
     }
 
     loop {
-        let (pending_input, turn_readiness) = turn_state.drain_mailbox().await.into_parts();
+        let (pending_input, _turn_readiness) = turn_state.drain_mailbox().await.into_parts();
 
         let turn_input: Vec<ResponseItem> = if is_review_mode {
             if !pending_input.is_empty() {
@@ -1736,15 +1731,7 @@ async fn run_task(sess: Arc<Session>, turn_state: Arc<TurnState>) {
             })
             .collect();
 
-        match run_turn(
-            &sess,
-            turn_state.as_ref(),
-            sub_id.clone(),
-            turn_input,
-            turn_readiness.clone(),
-        )
-        .await
-        {
+        match run_turn(&sess, turn_state.as_ref(), sub_id.clone(), turn_input).await {
             Ok(turn_output) => {
                 let TurnRunResult {
                     processed_items,
@@ -1976,7 +1963,6 @@ async fn run_turn(
     turn_state: &TurnState,
     sub_id: String,
     input: Vec<ResponseItem>,
-    turn_readiness: Option<Arc<ReadinessFlag>>,
 ) -> CodexResult<TurnRunResult> {
     let turn_context = turn_state.turn_context();
     let tools = get_openai_tools(
@@ -1993,16 +1979,7 @@ async fn run_turn(
 
     let mut retries = 0;
     loop {
-        match try_run_turn(
-            sess,
-            turn_state,
-            turn_context.as_ref(),
-            &sub_id,
-            &prompt,
-            turn_readiness.clone(),
-        )
-        .await
-        {
+        match try_run_turn(sess, turn_state, turn_context.as_ref(), &sub_id, &prompt).await {
             Ok(output) => return Ok(output),
             Err(CodexErr::Interrupted) => return Err(CodexErr::Interrupted),
             Err(CodexErr::EnvVar(var)) => return Err(CodexErr::EnvVar(var)),
@@ -2069,7 +2046,6 @@ async fn try_run_turn(
     turn_context: &TurnContext,
     sub_id: &str,
     prompt: &Prompt,
-    turn_readiness: Option<Arc<ReadinessFlag>>,
 ) -> CodexResult<TurnRunResult> {
     // call_ids that are part of this response.
     let completed_call_ids = prompt
@@ -2165,15 +2141,9 @@ async fn try_run_turn(
         match event {
             ResponseEvent::Created => {}
             ResponseEvent::OutputItemDone(item) => {
-                let response = handle_response_item(
-                    sess,
-                    turn_state,
-                    turn_context,
-                    sub_id,
-                    item.clone(),
-                    turn_readiness.clone(),
-                )
-                .await?;
+                let response =
+                    handle_response_item(sess, turn_state, turn_context, sub_id, item.clone())
+                        .await?;
                 output.push(ProcessedResponseItem { item, response });
             }
             ResponseEvent::WebSearchCallBegin { call_id } => {
@@ -2262,7 +2232,6 @@ async fn handle_response_item(
     turn_context: &TurnContext,
     sub_id: &str,
     item: ResponseItem,
-    turn_readiness: Option<Arc<ReadinessFlag>>,
 ) -> CodexResult<Option<ResponseInputItem>> {
     debug!(?item, "Output item");
     let output = match item {
@@ -2272,9 +2241,8 @@ async fn handle_response_item(
             call_id,
             ..
         } => {
-            if let Some(flag) = turn_readiness.as_ref() {
-                flag.wait_ready().await;
-            }
+            // Gate tool invocation on readiness signal for this turn, if set.
+            turn_state.wait_on_readiness().await;
             info!("FunctionCall: {name}({arguments})");
             Some(
                 handle_function_call(
@@ -2296,9 +2264,7 @@ async fn handle_response_item(
             action,
         } => {
             let LocalShellAction::Exec(action) = action;
-            if let Some(flag) = turn_readiness.as_ref() {
-                flag.wait_ready().await;
-            }
+            turn_state.wait_on_readiness().await;
             tracing::info!("LocalShellCall: {action:?}");
             let params = ShellToolCallParams {
                 command: action.command,
@@ -2342,9 +2308,7 @@ async fn handle_response_item(
             input,
             status: _,
         } => {
-            if let Some(flag) = turn_readiness.as_ref() {
-                flag.wait_ready().await;
-            }
+            turn_state.wait_on_readiness().await;
             Some(
                 handle_custom_tool_call(
                     sess,
diff --git a/codex-rs/core/src/state/turn.rs b/codex-rs/core/src/state/turn.rs
index afafe60d8d..79b446f77e 100644
--- a/codex-rs/core/src/state/turn.rs
+++ b/codex-rs/core/src/state/turn.rs
@@ -4,6 +4,7 @@ use std::path::PathBuf;
 use std::sync::Arc;
 
 use anyhow::Result;
+use codex_utils_readiness::Readiness;
 use codex_utils_readiness::ReadinessFlag;
 use serde_json::Value;
 use tokio::sync::RwLock;
@@ -228,4 +229,15 @@ impl TurnState {
         let mut runtime = self.runtime.write().await;
         runtime.diff_tracker.get_unified_diff()
     }
+
+    pub(crate) async fn latest_readiness(&self) -> Option<Arc<ReadinessFlag>> {
+        let runtime = self.runtime.read().await;
+        runtime.mailbox.latest_readiness.clone()
+    }
+
+    pub(crate) async fn wait_on_readiness(&self) {
+        if let Some(flag) = self.latest_readiness().await {
+            flag.wait_ready().await;
+        }
+    }
 }