Add config knob to disable request_user_input tool

codex-rs/core/config.schema.json

@@ -539,6 +539,9 @@
             "request_rule": {
               "type": "boolean"
             },
+            "request_user_input_tool": {
+              "type": "boolean"
+            },
             "responses_websocket_response_processed": {
               "type": "boolean"
             },
@@ -4462,6 +4465,9 @@
         "request_rule": {
           "type": "boolean"
         },
+        "request_user_input_tool": {
+          "type": "boolean"
+        },
         "responses_websocket_response_processed": {
           "type": "boolean"
         },

codex-rs/core/src/tools/spec_plan.rs

@@ -568,9 +568,11 @@ fn add_core_utility_tools(context: &CoreToolPlanContext<'_>, planned_tools: &mut
         planned_tools.add(UpdateGoalHandler);
     }
 
-    planned_tools.add(RequestUserInputHandler {
-        available_modes: request_user_input_available_modes(features),
-    });
+    if features.enabled(Feature::RequestUserInputTool) {
+        planned_tools.add(RequestUserInputHandler {
+            available_modes: request_user_input_available_modes(features),
+        });
+    }
 
     if features.enabled(Feature::RequestPermissionsTool) {
         planned_tools.add(RequestPermissionsHandler);

codex-rs/core/src/tools/spec_plan_tests.rs

@@ -442,6 +442,20 @@ async fn host_context_gates_goal_and_agent_job_tools() {
     worker_agent_job.assert_visible_contains(&["spawn_agents_on_csv", "report_agent_job_result"]);
 }
 
+#[tokio::test]
+async fn request_user_input_tool_can_be_disabled_by_feature() {
+    let enabled = probe(|_| {}).await;
+    enabled.assert_visible_contains(&["request_user_input"]);
+    enabled.assert_registered_contains(&["request_user_input"]);
+
+    let disabled = probe(|turn| {
+        set_feature(turn, Feature::RequestUserInputTool, /*enabled*/ false);
+    })
+    .await;
+    disabled.assert_visible_lacks(&["request_user_input"]);
+    disabled.assert_registered_lacks(&["request_user_input"]);
+}
+
 #[tokio::test]
 async fn mcp_and_tool_search_follow_direct_and_deferred_tool_exposure() {
     let direct_mcp = probe_with(

codex-rs/features/src/lib.rs

@@ -98,6 +98,8 @@ pub enum Feature {
     ExecPermissionApprovals,
     /// Expose the built-in request_permissions tool.
     RequestPermissionsTool,
+    /// Expose the built-in request_user_input tool.
+    RequestUserInputTool,
     /// Allow the model to request web searches that fetch live content.
     WebSearchRequest,
     /// Allow the model to request web searches that fetch cached content.
@@ -861,6 +863,12 @@ pub const FEATURES: &[FeatureSpec] = &[
         stage: Stage::UnderDevelopment,
         default_enabled: false,
     },
+    FeatureSpec {
+        id: Feature::RequestUserInputTool,
+        key: "request_user_input_tool",
+        stage: Stage::Stable,
+        default_enabled: true,
+    },
     FeatureSpec {
         id: Feature::UseLinuxSandboxBwrap,
         key: "use_linux_sandbox_bwrap",