diff --git a/codex-rs/analytics/src/analytics_client_tests.rs b/codex-rs/analytics/src/analytics_client_tests.rs
index cd96bac62..9b45a1a82 100644
--- a/codex-rs/analytics/src/analytics_client_tests.rs
+++ b/codex-rs/analytics/src/analytics_client_tests.rs
@@ -324,7 +324,7 @@ fn sample_turn_resolved_config(turn_id: &str) -> TurnResolvedConfigFact {
         reasoning_summary: None,
         service_tier: None,
         approval_policy: AskForApproval::OnRequest,
-        approvals_reviewer: ApprovalsReviewer::GuardianSubagent,
+        approvals_reviewer: ApprovalsReviewer::AutoReview,
         sandbox_network_access: true,
         collaboration_mode: ModeKind::Plan,
         personality: None,
diff --git a/codex-rs/app-server-protocol/src/protocol/v2.rs b/codex-rs/app-server-protocol/src/protocol/v2.rs
index 2760313dc..934fbc951 100644
--- a/codex-rs/app-server-protocol/src/protocol/v2.rs
+++ b/codex-rs/app-server-protocol/src/protocol/v2.rs
@@ -323,7 +323,7 @@ pub enum ApprovalsReviewer {
     #[serde(rename = "user")]
     User,
     #[serde(rename = "auto_review", alias = "guardian_subagent")]
-    GuardianSubagent,
+    AutoReview,
 }
 
 impl JsonSchema for ApprovalsReviewer {
@@ -361,7 +361,7 @@ impl ApprovalsReviewer {
     pub fn to_core(self) -> CoreApprovalsReviewer {
         match self {
             ApprovalsReviewer::User => CoreApprovalsReviewer::User,
-            ApprovalsReviewer::GuardianSubagent => CoreApprovalsReviewer::GuardianSubagent,
+            ApprovalsReviewer::AutoReview => CoreApprovalsReviewer::AutoReview,
         }
     }
 }
@@ -370,7 +370,7 @@ impl From<CoreApprovalsReviewer> for ApprovalsReviewer {
     fn from(value: CoreApprovalsReviewer) -> Self {
         match value {
             CoreApprovalsReviewer::User => ApprovalsReviewer::User,
-            CoreApprovalsReviewer::GuardianSubagent => ApprovalsReviewer::GuardianSubagent,
+            CoreApprovalsReviewer::AutoReview => ApprovalsReviewer::AutoReview,
         }
     }
 }
@@ -7393,8 +7393,7 @@ mod tests {
             "\"user\""
         );
         assert_eq!(
-            serde_json::to_string(&ApprovalsReviewer::GuardianSubagent)
-                .expect("serialize reviewer"),
+            serde_json::to_string(&ApprovalsReviewer::AutoReview).expect("serialize reviewer"),
             "\"auto_review\""
         );
 
@@ -7405,7 +7404,7 @@ mod tests {
             let expected = if value == "user" {
                 ApprovalsReviewer::User
             } else {
-                ApprovalsReviewer::GuardianSubagent
+                ApprovalsReviewer::AutoReview
             };
             assert_eq!(expected, reviewer);
         }
@@ -8679,7 +8678,7 @@ mod tests {
             model_auto_compact_token_limit: None,
             model_provider: None,
             approval_policy: None,
-            approvals_reviewer: Some(ApprovalsReviewer::GuardianSubagent),
+            approvals_reviewer: Some(ApprovalsReviewer::AutoReview),
             sandbox_mode: None,
             sandbox_workspace_write: None,
             forced_chatgpt_workspace_id: None,
@@ -8781,7 +8780,7 @@ mod tests {
                     model: None,
                     model_provider: None,
                     approval_policy: None,
-                    approvals_reviewer: Some(ApprovalsReviewer::GuardianSubagent),
+                    approvals_reviewer: Some(ApprovalsReviewer::AutoReview),
                     service_tier: None,
                     model_reasoning_effort: None,
                     model_reasoning_summary: None,
diff --git a/codex-rs/app-server/src/config_api.rs b/codex-rs/app-server/src/config_api.rs
index df4ad24d6..a1df875c2 100644
--- a/codex-rs/app-server/src/config_api.rs
+++ b/codex-rs/app-server/src/config_api.rs
@@ -459,7 +459,7 @@ mod tests {
             ]),
             allowed_approvals_reviewers: Some(vec![
                 CoreApprovalsReviewer::User,
-                CoreApprovalsReviewer::GuardianSubagent,
+                CoreApprovalsReviewer::AutoReview,
             ]),
             allowed_sandbox_modes: Some(vec![
                 CoreSandboxModeRequirement::ReadOnly,
@@ -524,7 +524,7 @@ mod tests {
             mapped.allowed_approvals_reviewers,
             Some(vec![
                 codex_app_server_protocol::ApprovalsReviewer::User,
-                codex_app_server_protocol::ApprovalsReviewer::GuardianSubagent,
+                codex_app_server_protocol::ApprovalsReviewer::AutoReview,
             ])
         );
         assert_eq!(
diff --git a/codex-rs/config/src/config_requirements.rs b/codex-rs/config/src/config_requirements.rs
index ac954a1f4..1d3ea49cf 100644
--- a/codex-rs/config/src/config_requirements.rs
+++ b/codex-rs/config/src/config_requirements.rs
@@ -1185,7 +1185,7 @@ mod tests {
 
         let allowed_approval_policies = vec![AskForApproval::UnlessTrusted, AskForApproval::Never];
         let allowed_approvals_reviewers =
-            vec![ApprovalsReviewer::GuardianSubagent, ApprovalsReviewer::User];
+            vec![ApprovalsReviewer::AutoReview, ApprovalsReviewer::User];
         let allowed_sandbox_modes = vec![
             SandboxModeRequirement::WorkspaceWrite,
             SandboxModeRequirement::DangerFullAccess,
@@ -1690,7 +1690,7 @@ allowed_approvals_reviewers = ["user"]
             Err(ConstraintError::InvalidValue {
                 field_name: "approvals_reviewer",
                 candidate: "User".into(),
-                allowed: "[GuardianSubagent]".into(),
+                allowed: "[AutoReview]".into(),
                 requirement_source: source_location,
             })
         );
@@ -1837,13 +1837,13 @@ allowed_approvals_reviewers = ["user"]
 
         assert_eq!(
             requirements.approvals_reviewer.value(),
-            ApprovalsReviewer::GuardianSubagent,
+            ApprovalsReviewer::AutoReview,
             "currently, there is no way to specify the default value for approvals reviewer in the toml, so it picks the first allowed value"
         );
         assert!(
             requirements
                 .approvals_reviewer
-                .can_set(&ApprovalsReviewer::GuardianSubagent)
+                .can_set(&ApprovalsReviewer::AutoReview)
                 .is_ok()
         );
         assert!(
@@ -1866,7 +1866,7 @@ allowed_approvals_reviewers = ["user"]
 
         assert_eq!(
             requirements.approvals_reviewer.value(),
-            ApprovalsReviewer::GuardianSubagent
+            ApprovalsReviewer::AutoReview
         );
 
         Ok(())
diff --git a/codex-rs/core/src/codex_delegate_tests.rs b/codex-rs/core/src/codex_delegate_tests.rs
index 3e685d92e..3ce70c513 100644
--- a/codex-rs/core/src/codex_delegate_tests.rs
+++ b/codex-rs/core/src/codex_delegate_tests.rs
@@ -251,7 +251,7 @@ async fn handle_exec_approval_uses_call_id_for_guardian_review_and_approval_id_f
         crate::session::tests::make_session_and_context_with_rx().await;
     let mut parent_ctx = Arc::try_unwrap(parent_ctx).expect("single turn context ref");
     let mut config = (*parent_ctx.config).clone();
-    config.approvals_reviewer = ApprovalsReviewer::GuardianSubagent;
+    config.approvals_reviewer = ApprovalsReviewer::AutoReview;
     parent_ctx.config = Arc::new(config);
     parent_ctx
         .approval_policy
@@ -363,7 +363,7 @@ async fn delegated_mcp_guardian_abort_returns_synthetic_decline_answer() {
         crate::session::tests::make_session_and_context_with_rx().await;
     let mut parent_ctx = Arc::try_unwrap(parent_ctx).expect("single turn context ref");
     let mut config = (*parent_ctx.config).clone();
-    config.approvals_reviewer = ApprovalsReviewer::GuardianSubagent;
+    config.approvals_reviewer = ApprovalsReviewer::AutoReview;
     parent_ctx.config = Arc::new(config);
     parent_ctx
         .approval_policy
diff --git a/codex-rs/core/src/config/config_tests.rs b/codex-rs/core/src/config/config_tests.rs
index a0d0583cb..044c6c828 100644
--- a/codex-rs/core/src/config/config_tests.rs
+++ b/codex-rs/core/src/config/config_tests.rs
@@ -6741,10 +6741,7 @@ approvals_reviewer = "guardian_subagent"
         .build()
         .await?;
 
-    assert_eq!(
-        config.approvals_reviewer,
-        ApprovalsReviewer::GuardianSubagent
-    );
+    assert_eq!(config.approvals_reviewer, ApprovalsReviewer::AutoReview);
     Ok(())
 }
 
@@ -6757,17 +6754,14 @@ async fn requirements_disallowing_default_approvals_reviewer_falls_back_to_requi
         .codex_home(codex_home.path().to_path_buf())
         .cloud_requirements(CloudRequirementsLoader::new(async {
             Ok(Some(crate::config_loader::ConfigRequirementsToml {
-                allowed_approvals_reviewers: Some(vec![ApprovalsReviewer::GuardianSubagent]),
+                allowed_approvals_reviewers: Some(vec![ApprovalsReviewer::AutoReview]),
                 ..Default::default()
             }))
         }))
         .build()
         .await?;
 
-    assert_eq!(
-        config.approvals_reviewer,
-        ApprovalsReviewer::GuardianSubagent
-    );
+    assert_eq!(config.approvals_reviewer, ApprovalsReviewer::AutoReview);
     Ok(())
 }
 
@@ -6786,17 +6780,14 @@ async fn root_approvals_reviewer_falls_back_when_disallowed_by_requirements() ->
         .fallback_cwd(Some(codex_home.path().to_path_buf()))
         .cloud_requirements(CloudRequirementsLoader::new(async {
             Ok(Some(crate::config_loader::ConfigRequirementsToml {
-                allowed_approvals_reviewers: Some(vec![ApprovalsReviewer::GuardianSubagent]),
+                allowed_approvals_reviewers: Some(vec![ApprovalsReviewer::AutoReview]),
                 ..Default::default()
             }))
         }))
         .build()
         .await?;
 
-    assert_eq!(
-        config.approvals_reviewer,
-        ApprovalsReviewer::GuardianSubagent
-    );
+    assert_eq!(config.approvals_reviewer, ApprovalsReviewer::AutoReview);
     assert!(
         config.startup_warnings.iter().any(|warning| {
             warning
@@ -6826,17 +6817,14 @@ approvals_reviewer = "user"
         .fallback_cwd(Some(codex_home.path().to_path_buf()))
         .cloud_requirements(CloudRequirementsLoader::new(async {
             Ok(Some(crate::config_loader::ConfigRequirementsToml {
-                allowed_approvals_reviewers: Some(vec![ApprovalsReviewer::GuardianSubagent]),
+                allowed_approvals_reviewers: Some(vec![ApprovalsReviewer::AutoReview]),
                 ..Default::default()
             }))
         }))
         .build()
         .await?;
 
-    assert_eq!(
-        config.approvals_reviewer,
-        ApprovalsReviewer::GuardianSubagent
-    );
+    assert_eq!(config.approvals_reviewer, ApprovalsReviewer::AutoReview);
     Ok(())
 }
 
@@ -6857,7 +6845,7 @@ async fn approvals_reviewer_preserves_valid_user_choice_when_allowed_by_requirem
             Ok(Some(crate::config_loader::ConfigRequirementsToml {
                 allowed_approvals_reviewers: Some(vec![
                     ApprovalsReviewer::User,
-                    ApprovalsReviewer::GuardianSubagent,
+                    ApprovalsReviewer::AutoReview,
                 ]),
                 ..Default::default()
             }))
@@ -6865,10 +6853,7 @@ async fn approvals_reviewer_preserves_valid_user_choice_when_allowed_by_requirem
         .build()
         .await?;
 
-    assert_eq!(
-        config.approvals_reviewer,
-        ApprovalsReviewer::GuardianSubagent
-    );
+    assert_eq!(config.approvals_reviewer, ApprovalsReviewer::AutoReview);
     assert!(
         config
             .startup_warnings
diff --git a/codex-rs/core/src/config_loader/mod.rs b/codex-rs/core/src/config_loader/mod.rs
index d7a215c17..95dd76f62 100644
--- a/codex-rs/core/src/config_loader/mod.rs
+++ b/codex-rs/core/src/config_loader/mod.rs
@@ -1048,7 +1048,7 @@ impl From<LegacyManagedConfigToml> for ConfigRequirementsToml {
         }
         if let Some(approvals_reviewer) = approvals_reviewer {
             let mut allowed_reviewers = vec![approvals_reviewer];
-            if approvals_reviewer == ApprovalsReviewer::GuardianSubagent {
+            if approvals_reviewer == ApprovalsReviewer::AutoReview {
                 allowed_reviewers.push(ApprovalsReviewer::User);
             }
             config_requirements_toml.allowed_approvals_reviewers = Some(allowed_reviewers);
@@ -1135,7 +1135,7 @@ foo = "xyzzy"
     fn legacy_managed_config_backfill_allows_user_when_guardian_is_required() {
         let legacy = LegacyManagedConfigToml {
             approval_policy: None,
-            approvals_reviewer: Some(ApprovalsReviewer::GuardianSubagent),
+            approvals_reviewer: Some(ApprovalsReviewer::AutoReview),
             sandbox_mode: None,
         };
 
@@ -1143,10 +1143,7 @@ foo = "xyzzy"
 
         assert_eq!(
             requirements.allowed_approvals_reviewers,
-            Some(vec![
-                ApprovalsReviewer::GuardianSubagent,
-                ApprovalsReviewer::User,
-            ])
+            Some(vec![ApprovalsReviewer::AutoReview, ApprovalsReviewer::User,])
         );
     }
 
diff --git a/codex-rs/core/src/context/permissions_instructions.rs b/codex-rs/core/src/context/permissions_instructions.rs
index db420f746..6ba4e7c15 100644
--- a/codex-rs/core/src/context/permissions_instructions.rs
+++ b/codex-rs/core/src/context/permissions_instructions.rs
@@ -188,7 +188,7 @@ fn approval_text(
         ),
     };
 
-    if approvals_reviewer == ApprovalsReviewer::GuardianSubagent
+    if approvals_reviewer == ApprovalsReviewer::AutoReview
         && approval_policy != AskForApproval::Never
     {
         format!("{text}\n\n{AUTO_REVIEW_APPROVAL_SUFFIX}")
diff --git a/codex-rs/core/src/context/permissions_instructions_tests.rs b/codex-rs/core/src/context/permissions_instructions_tests.rs
index 2f3e8c640..866c68b4a 100644
--- a/codex-rs/core/src/context/permissions_instructions_tests.rs
+++ b/codex-rs/core/src/context/permissions_instructions_tests.rs
@@ -197,10 +197,10 @@ fn on_request_includes_tool_guidance_alongside_inline_permission_guidance_when_b
 }
 
 #[test]
-fn guardian_subagent_approvals_append_guardian_specific_guidance() {
+fn auto_review_approvals_append_auto_review_specific_guidance() {
     let text = approval_text(
         AskForApproval::OnRequest,
-        ApprovalsReviewer::GuardianSubagent,
+        ApprovalsReviewer::AutoReview,
         &Policy::empty(),
         /*exec_permission_approvals_enabled*/ false,
         /*request_permissions_tool_enabled*/ false,
@@ -212,10 +212,10 @@ fn guardian_subagent_approvals_append_guardian_specific_guidance() {
 }
 
 #[test]
-fn guardian_subagent_approvals_omit_guardian_specific_guidance_when_approval_is_never() {
+fn auto_review_approvals_omit_auto_review_specific_guidance_when_approval_is_never() {
     let text = approval_text(
         AskForApproval::Never,
-        ApprovalsReviewer::GuardianSubagent,
+        ApprovalsReviewer::AutoReview,
         &Policy::empty(),
         /*exec_permission_approvals_enabled*/ false,
         /*request_permissions_tool_enabled*/ false,
diff --git a/codex-rs/core/src/guardian/review.rs b/codex-rs/core/src/guardian/review.rs
index 3b5c63b4d..2635d641d 100644
--- a/codex-rs/core/src/guardian/review.rs
+++ b/codex-rs/core/src/guardian/review.rs
@@ -146,7 +146,7 @@ pub(crate) fn routes_approval_to_guardian(turn: &TurnContext) -> bool {
     matches!(
         turn.approval_policy.value(),
         AskForApproval::OnRequest | AskForApproval::Granular(_)
-    ) && turn.config.approvals_reviewer == ApprovalsReviewer::GuardianSubagent
+    ) && turn.config.approvals_reviewer == ApprovalsReviewer::AutoReview
 }
 
 pub(crate) fn is_guardian_reviewer_source(
diff --git a/codex-rs/core/src/guardian/tests.rs b/codex-rs/core/src/guardian/tests.rs
index 41e33accf..470a46498 100644
--- a/codex-rs/core/src/guardian/tests.rs
+++ b/codex-rs/core/src/guardian/tests.rs
@@ -909,7 +909,7 @@ async fn routes_approval_to_guardian_requires_guardian_reviewer() {
 
     assert!(!routes_approval_to_guardian(&turn));
 
-    config.approvals_reviewer = ApprovalsReviewer::GuardianSubagent;
+    config.approvals_reviewer = ApprovalsReviewer::AutoReview;
     turn.config = Arc::new(config);
 
     assert!(routes_approval_to_guardian(&turn));
@@ -919,7 +919,7 @@ async fn routes_approval_to_guardian_requires_guardian_reviewer() {
 async fn routes_approval_to_guardian_allows_granular_review_policy() {
     let (_session, mut turn) = crate::session::tests::make_session_and_context().await;
     let mut config = (*turn.config).clone();
-    config.approvals_reviewer = ApprovalsReviewer::GuardianSubagent;
+    config.approvals_reviewer = ApprovalsReviewer::AutoReview;
     turn.config = Arc::new(config);
     turn.approval_policy
         .set(AskForApproval::Granular(GranularApprovalConfig {
diff --git a/codex-rs/core/src/mcp_tool_call_tests.rs b/codex-rs/core/src/mcp_tool_call_tests.rs
index d20f23395..ed355c47b 100644
--- a/codex-rs/core/src/mcp_tool_call_tests.rs
+++ b/codex-rs/core/src/mcp_tool_call_tests.rs
@@ -1411,7 +1411,7 @@ async fn guardian_mode_skips_auto_when_annotations_do_not_require_approval() {
         .expect("test setup should allow updating approval policy");
     let mut config = (*turn_context.config).clone();
     config.model_provider.base_url = Some(format!("{}/v1", server.uri()));
-    config.approvals_reviewer = ApprovalsReviewer::GuardianSubagent;
+    config.approvals_reviewer = ApprovalsReviewer::AutoReview;
     let config = Arc::new(config);
     let models_manager = Arc::new(crate::test_support::models_manager_with_provider(
         config.codex_home.to_path_buf(),
@@ -1490,7 +1490,7 @@ async fn guardian_mode_mcp_denial_returns_rationale_message() {
         .expect("test setup should allow updating approval policy");
     let mut config = (*turn_context.config).clone();
     config.model_provider.base_url = Some(format!("{}/v1", server.uri()));
-    config.approvals_reviewer = ApprovalsReviewer::GuardianSubagent;
+    config.approvals_reviewer = ApprovalsReviewer::AutoReview;
     let config = Arc::new(config);
     let models_manager = Arc::new(crate::test_support::models_manager_with_provider(
         config.codex_home.to_path_buf(),
@@ -1947,7 +1947,7 @@ async fn approve_mode_routes_arc_ask_user_to_guardian_when_guardian_reviewer_is_
     let mut config = (*turn_context.config).clone();
     config.chatgpt_base_url = server.uri();
     config.model_provider.base_url = Some(format!("{}/v1", server.uri()));
-    config.approvals_reviewer = ApprovalsReviewer::GuardianSubagent;
+    config.approvals_reviewer = ApprovalsReviewer::AutoReview;
     let config = Arc::new(config);
     let models_manager = Arc::new(crate::test_support::models_manager_with_provider(
         config.codex_home.to_path_buf(),
diff --git a/codex-rs/core/src/session/tests.rs b/codex-rs/core/src/session/tests.rs
index 4c5526869..4d88fa923 100644
--- a/codex-rs/core/src/session/tests.rs
+++ b/codex-rs/core/src/session/tests.rs
@@ -3827,7 +3827,7 @@ async fn user_turn_updates_approvals_reviewer() {
             }],
             cwd: config.cwd.to_path_buf(),
             approval_policy: config.permissions.approval_policy.value(),
-            approvals_reviewer: Some(codex_config::types::ApprovalsReviewer::GuardianSubagent),
+            approvals_reviewer: Some(codex_config::types::ApprovalsReviewer::AutoReview),
             sandbox_policy: config.permissions.sandbox_policy.get().clone(),
             model: turn_context.model_info.slug.clone(),
             effort: config.model_reasoning_effort,
@@ -3843,7 +3843,7 @@ async fn user_turn_updates_approvals_reviewer() {
     let state = session.state.lock().await;
     assert_eq!(
         state.session_configuration.approvals_reviewer,
-        codex_config::types::ApprovalsReviewer::GuardianSubagent
+        codex_config::types::ApprovalsReviewer::AutoReview
     );
 }
 
diff --git a/codex-rs/core/src/session/tests/guardian_tests.rs b/codex-rs/core/src/session/tests/guardian_tests.rs
index c7496c048..5057c43ce 100644
--- a/codex-rs/core/src/session/tests/guardian_tests.rs
+++ b/codex-rs/core/src/session/tests/guardian_tests.rs
@@ -88,7 +88,7 @@ async fn request_permissions_routes_to_guardian_when_reviewer_is_enabled() {
         .enable(Feature::GuardianApproval)
         .expect("test setup should allow enabling guardian approvals");
     let mut config = (*turn_context_raw.config).clone();
-    config.approvals_reviewer = ApprovalsReviewer::GuardianSubagent;
+    config.approvals_reviewer = ApprovalsReviewer::AutoReview;
     config.model_provider.base_url = Some(format!("{}/v1", server.uri()));
     let config = Arc::new(config);
     let models_manager = Arc::new(crate::test_support::models_manager_with_provider(
@@ -166,7 +166,7 @@ async fn request_permissions_guardian_review_stops_when_cancelled() {
         .enable(Feature::GuardianApproval)
         .expect("test setup should allow enabling guardian approvals");
     let mut config = (*turn_context_raw.config).clone();
-    config.approvals_reviewer = ApprovalsReviewer::GuardianSubagent;
+    config.approvals_reviewer = ApprovalsReviewer::AutoReview;
     config.model_provider.base_url = Some(format!("{}/v1", server.uri()));
     let config = Arc::new(config);
     let models_manager = Arc::new(crate::test_support::models_manager_with_provider(
diff --git a/codex-rs/exec/src/lib_tests.rs b/codex-rs/exec/src/lib_tests.rs
index 50fe8552b..f24c3fd57 100644
--- a/codex-rs/exec/src/lib_tests.rs
+++ b/codex-rs/exec/src/lib_tests.rs
@@ -375,7 +375,7 @@ async fn thread_start_params_include_review_policy_when_auto_review_is_enabled()
     let config = ConfigBuilder::default()
         .codex_home(codex_home.path().to_path_buf())
         .harness_overrides(ConfigOverrides {
-            approvals_reviewer: Some(ApprovalsReviewer::GuardianSubagent),
+            approvals_reviewer: Some(ApprovalsReviewer::AutoReview),
             ..Default::default()
         })
         .fallback_cwd(Some(cwd.path().to_path_buf()))
@@ -387,7 +387,7 @@ async fn thread_start_params_include_review_policy_when_auto_review_is_enabled()
 
     assert_eq!(
         params.approvals_reviewer,
-        Some(codex_app_server_protocol::ApprovalsReviewer::GuardianSubagent)
+        Some(codex_app_server_protocol::ApprovalsReviewer::AutoReview)
     );
 }
 
@@ -419,7 +419,7 @@ fn session_configured_from_thread_response_uses_review_policy_from_response() {
         cwd: test_path_buf("/tmp").abs(),
         instruction_sources: Vec::new(),
         approval_policy: codex_app_server_protocol::AskForApproval::OnRequest,
-        approvals_reviewer: codex_app_server_protocol::ApprovalsReviewer::GuardianSubagent,
+        approvals_reviewer: codex_app_server_protocol::ApprovalsReviewer::AutoReview,
         sandbox: codex_app_server_protocol::SandboxPolicy::WorkspaceWrite {
             writable_roots: vec![],
             read_only_access: codex_app_server_protocol::ReadOnlyAccess::FullAccess,
@@ -440,8 +440,5 @@ fn session_configured_from_thread_response_uses_review_policy_from_response() {
     let event = session_configured_from_thread_start_response(&response)
         .expect("build bootstrap session configured event");
 
-    assert_eq!(
-        event.approvals_reviewer,
-        ApprovalsReviewer::GuardianSubagent
-    );
+    assert_eq!(event.approvals_reviewer, ApprovalsReviewer::AutoReview);
 }
diff --git a/codex-rs/protocol/src/config_types.rs b/codex-rs/protocol/src/config_types.rs
index 5c407d996..06484c644 100644
--- a/codex-rs/protocol/src/config_types.rs
+++ b/codex-rs/protocol/src/config_types.rs
@@ -89,7 +89,7 @@ pub enum ApprovalsReviewer {
     User,
     #[serde(rename = "auto_review", alias = "guardian_subagent")]
     #[strum(serialize = "auto_review")]
-    GuardianSubagent,
+    AutoReview,
 }
 
 impl JsonSchema for ApprovalsReviewer {
@@ -608,8 +608,7 @@ mod tests {
             "\"user\""
         );
         assert_eq!(
-            serde_json::to_string(&ApprovalsReviewer::GuardianSubagent)
-                .expect("serialize reviewer"),
+            serde_json::to_string(&ApprovalsReviewer::AutoReview).expect("serialize reviewer"),
             "\"auto_review\""
         );
 
@@ -620,7 +619,7 @@ mod tests {
             let expected = if value == "user" {
                 ApprovalsReviewer::User
             } else {
-                ApprovalsReviewer::GuardianSubagent
+                ApprovalsReviewer::AutoReview
             };
             assert_eq!(expected, reviewer);
         }
diff --git a/codex-rs/tui/src/app.rs b/codex-rs/tui/src/app.rs
index f2dfd5fa2..8a9092441 100644
--- a/codex-rs/tui/src/app.rs
+++ b/codex-rs/tui/src/app.rs
@@ -300,7 +300,7 @@ fn default_exec_approval_decisions(
 }
 
 #[derive(Clone, Debug, PartialEq, Eq)]
-struct GuardianApprovalsMode {
+struct AutoReviewMode {
     approval_policy: AskForApproval,
     approvals_reviewer: ApprovalsReviewer,
     sandbox_policy: SandboxPolicy,
@@ -309,11 +309,11 @@ struct GuardianApprovalsMode {
 /// Enabling the Auto-review experiment in the TUI should also switch the
 /// current `/approvals` settings to the matching Auto-review mode. Users
 /// can still change `/approvals` afterward; this just assumes that opting into
-/// the experiment means they want guardian review enabled immediately.
-fn guardian_approvals_mode() -> GuardianApprovalsMode {
-    GuardianApprovalsMode {
+/// the experiment means they want Auto-review enabled immediately.
+fn auto_review_mode() -> AutoReviewMode {
+    AutoReviewMode {
         approval_policy: AskForApproval::OnRequest,
-        approvals_reviewer: ApprovalsReviewer::GuardianSubagent,
+        approvals_reviewer: ApprovalsReviewer::AutoReview,
         sandbox_policy: SandboxPolicy::new_workspace_write_policy(),
     }
 }
diff --git a/codex-rs/tui/src/app/config_persistence.rs b/codex-rs/tui/src/app/config_persistence.rs
index edfde7cee..20056e8d5 100644
--- a/codex-rs/tui/src/app/config_persistence.rs
+++ b/codex-rs/tui/src/app/config_persistence.rs
@@ -126,7 +126,7 @@ impl App {
             return;
         }
 
-        let guardian_approvals_preset = guardian_approvals_mode();
+        let auto_review_preset = auto_review_mode();
         let mut next_config = self.config.clone();
         let active_profile = self.active_profile.clone();
         let scoped_segments = |key: &str| {
@@ -202,16 +202,12 @@ impl App {
                     // Persist the reviewer setting so future sessions keep the
                     // experiment's matching `/approvals` mode until the user
                     // changes it explicitly.
-                    feature_config.approvals_reviewer =
-                        guardian_approvals_preset.approvals_reviewer;
+                    feature_config.approvals_reviewer = auto_review_preset.approvals_reviewer;
                     feature_edits.push(ConfigEdit::SetPath {
                         segments: scoped_segments("approvals_reviewer"),
-                        value: guardian_approvals_preset
-                            .approvals_reviewer
-                            .to_string()
-                            .into(),
+                        value: auto_review_preset.approvals_reviewer.to_string().into(),
                     });
-                    if previous_approvals_reviewer != guardian_approvals_preset.approvals_reviewer {
+                    if previous_approvals_reviewer != auto_review_preset.approvals_reviewer {
                         permissions_history_label = Some("Auto-review");
                     }
                 } else if !effective_enabled {
@@ -234,17 +230,17 @@ impl App {
                 // makes guardian review observable in the current thread.
                 if !self.try_set_approval_policy_on_config(
                     &mut feature_config,
-                    guardian_approvals_preset.approval_policy,
+                    auto_review_preset.approval_policy,
                     "Failed to enable Auto-review",
-                    "failed to set guardian approvals approval policy on staged config",
+                    "failed to set auto-review approval policy on staged config",
                 ) {
                     continue;
                 }
                 if !self.try_set_sandbox_policy_on_config(
                     &mut feature_config,
-                    guardian_approvals_preset.sandbox_policy.clone(),
+                    auto_review_preset.sandbox_policy.clone(),
                     "Failed to enable Auto-review",
-                    "failed to set guardian approvals sandbox policy on staged config",
+                    "failed to set auto-review sandbox policy on staged config",
                 ) {
                     continue;
                 }
@@ -258,8 +254,8 @@ impl App {
                         value: "workspace-write".into(),
                     },
                 ]);
-                approval_policy_override = Some(guardian_approvals_preset.approval_policy);
-                sandbox_policy_override = Some(guardian_approvals_preset.sandbox_policy.clone());
+                approval_policy_override = Some(auto_review_preset.approval_policy);
+                sandbox_policy_override = Some(auto_review_preset.sandbox_policy.clone());
             }
             next_config = feature_config;
             feature_updates_to_apply.push((feature, effective_enabled));
@@ -305,7 +301,7 @@ impl App {
         {
             tracing::error!(
                 error = %err,
-                "failed to set guardian approvals sandbox policy on chat config"
+                "failed to set auto-review sandbox policy on chat config"
             );
             self.chat_widget
                 .add_error_message(format!("Failed to enable Auto-review: {err}"));
diff --git a/codex-rs/tui/src/app/tests.rs b/codex-rs/tui/src/app/tests.rs
index 891c9649d..3cf6ff1a1 100644
--- a/codex-rs/tui/src/app/tests.rs
+++ b/codex-rs/tui/src/app/tests.rs
@@ -1598,11 +1598,11 @@ async fn reset_memories_clears_local_memory_directories() -> Result<()> {
 }
 
 #[tokio::test]
-async fn update_feature_flags_enabling_guardian_selects_guardian_approvals() -> Result<()> {
+async fn update_feature_flags_enabling_guardian_selects_auto_review() -> Result<()> {
     let (mut app, mut app_event_rx, mut op_rx) = make_test_app_with_channels().await;
     let codex_home = tempdir()?;
     app.config.codex_home = codex_home.path().to_path_buf().abs();
-    let guardian_approvals = guardian_approvals_mode();
+    let auto_review = auto_review_mode();
 
     app.update_feature_flags(vec![(Feature::GuardianApproval, true)])
         .await;
@@ -1616,11 +1616,11 @@ async fn update_feature_flags_enabling_guardian_selects_guardian_approvals() ->
     );
     assert_eq!(
         app.config.approvals_reviewer,
-        guardian_approvals.approvals_reviewer
+        auto_review.approvals_reviewer
     );
     assert_eq!(
         app.config.permissions.approval_policy.value(),
-        guardian_approvals.approval_policy
+        auto_review.approval_policy
     );
     assert_eq!(
         app.chat_widget
@@ -1628,7 +1628,7 @@ async fn update_feature_flags_enabling_guardian_selects_guardian_approvals() ->
             .permissions
             .approval_policy
             .value(),
-        guardian_approvals.approval_policy
+        auto_review.approval_policy
     );
     assert_eq!(
         app.chat_widget
@@ -1636,11 +1636,11 @@ async fn update_feature_flags_enabling_guardian_selects_guardian_approvals() ->
             .permissions
             .sandbox_policy
             .get(),
-        &guardian_approvals.sandbox_policy
+        &auto_review.sandbox_policy
     );
     assert_eq!(
         app.chat_widget.config_ref().approvals_reviewer,
-        guardian_approvals.approvals_reviewer
+        auto_review.approvals_reviewer
     );
     assert_eq!(app.runtime_approval_policy_override, None);
     assert_eq!(app.runtime_sandbox_policy_override, None);
@@ -1648,9 +1648,9 @@ async fn update_feature_flags_enabling_guardian_selects_guardian_approvals() ->
         op_rx.try_recv(),
         Ok(Op::OverrideTurnContext {
             cwd: None,
-            approval_policy: Some(guardian_approvals.approval_policy),
-            approvals_reviewer: Some(guardian_approvals.approvals_reviewer),
-            sandbox_policy: Some(guardian_approvals.sandbox_policy.clone()),
+            approval_policy: Some(auto_review.approval_policy),
+            approvals_reviewer: Some(auto_review.approvals_reviewer),
+            sandbox_policy: Some(auto_review.sandbox_policy.clone()),
             permission_profile: None,
             windows_sandbox_level: None,
             model: None,
@@ -1700,9 +1700,9 @@ async fn update_feature_flags_disabling_guardian_clears_review_policy_and_restor
         .set_enabled(Feature::GuardianApproval, /*enabled*/ true)?;
     app.chat_widget
         .set_feature_enabled(Feature::GuardianApproval, /*enabled*/ true);
-    app.config.approvals_reviewer = ApprovalsReviewer::GuardianSubagent;
+    app.config.approvals_reviewer = ApprovalsReviewer::AutoReview;
     app.chat_widget
-        .set_approvals_reviewer(ApprovalsReviewer::GuardianSubagent);
+        .set_approvals_reviewer(ApprovalsReviewer::AutoReview);
     app.config
         .permissions
         .approval_policy
@@ -1779,7 +1779,7 @@ async fn update_feature_flags_enabling_guardian_overrides_explicit_manual_review
     let (mut app, _app_event_rx, mut op_rx) = make_test_app_with_channels().await;
     let codex_home = tempdir()?;
     app.config.codex_home = codex_home.path().to_path_buf().abs();
-    let guardian_approvals = guardian_approvals_mode();
+    let auto_review = auto_review_mode();
     let config_toml_path = codex_home.path().join("config.toml").abs();
     let config_toml = "approvals_reviewer = \"user\"\n";
     std::fs::write(config_toml_path.as_path(), config_toml)?;
@@ -1798,15 +1798,15 @@ async fn update_feature_flags_enabling_guardian_overrides_explicit_manual_review
     assert!(app.config.features.enabled(Feature::GuardianApproval));
     assert_eq!(
         app.config.approvals_reviewer,
-        guardian_approvals.approvals_reviewer
+        auto_review.approvals_reviewer
     );
     assert_eq!(
         app.chat_widget.config_ref().approvals_reviewer,
-        guardian_approvals.approvals_reviewer
+        auto_review.approvals_reviewer
     );
     assert_eq!(
         app.config.permissions.approval_policy.value(),
-        guardian_approvals.approval_policy
+        auto_review.approval_policy
     );
     assert_eq!(
         app.chat_widget
@@ -1814,15 +1814,15 @@ async fn update_feature_flags_enabling_guardian_overrides_explicit_manual_review
             .permissions
             .sandbox_policy
             .get(),
-        &guardian_approvals.sandbox_policy
+        &auto_review.sandbox_policy
     );
     assert_eq!(
         op_rx.try_recv(),
         Ok(Op::OverrideTurnContext {
             cwd: None,
-            approval_policy: Some(guardian_approvals.approval_policy),
-            approvals_reviewer: Some(guardian_approvals.approvals_reviewer),
-            sandbox_policy: Some(guardian_approvals.sandbox_policy.clone()),
+            approval_policy: Some(auto_review.approval_policy),
+            approvals_reviewer: Some(auto_review.approvals_reviewer),
+            sandbox_policy: Some(auto_review.sandbox_policy.clone()),
             permission_profile: None,
             windows_sandbox_level: None,
             model: None,
@@ -1908,7 +1908,7 @@ async fn update_feature_flags_enabling_guardian_in_profile_sets_profile_auto_rev
     let (mut app, _app_event_rx, mut op_rx) = make_test_app_with_channels().await;
     let codex_home = tempdir()?;
     app.config.codex_home = codex_home.path().to_path_buf().abs();
-    let guardian_approvals = guardian_approvals_mode();
+    let auto_review = auto_review_mode();
     app.active_profile = Some("guardian".to_string());
     let config_toml_path = codex_home.path().join("config.toml").abs();
     let config_toml = "profile = \"guardian\"\napprovals_reviewer = \"user\"\n";
@@ -1928,19 +1928,19 @@ async fn update_feature_flags_enabling_guardian_in_profile_sets_profile_auto_rev
     assert!(app.config.features.enabled(Feature::GuardianApproval));
     assert_eq!(
         app.config.approvals_reviewer,
-        guardian_approvals.approvals_reviewer
+        auto_review.approvals_reviewer
     );
     assert_eq!(
         app.chat_widget.config_ref().approvals_reviewer,
-        guardian_approvals.approvals_reviewer
+        auto_review.approvals_reviewer
     );
     assert_eq!(
         op_rx.try_recv(),
         Ok(Op::OverrideTurnContext {
             cwd: None,
-            approval_policy: Some(guardian_approvals.approval_policy),
-            approvals_reviewer: Some(guardian_approvals.approvals_reviewer),
-            sandbox_policy: Some(guardian_approvals.sandbox_policy.clone()),
+            approval_policy: Some(auto_review.approval_policy),
+            approvals_reviewer: Some(auto_review.approvals_reviewer),
+            sandbox_policy: Some(auto_review.sandbox_policy.clone()),
             permission_profile: None,
             windows_sandbox_level: None,
             model: None,
@@ -2003,9 +2003,9 @@ guardian_approval = true
         .set_enabled(Feature::GuardianApproval, /*enabled*/ true)?;
     app.chat_widget
         .set_feature_enabled(Feature::GuardianApproval, /*enabled*/ true);
-    app.config.approvals_reviewer = ApprovalsReviewer::GuardianSubagent;
+    app.config.approvals_reviewer = ApprovalsReviewer::AutoReview;
     app.chat_widget
-        .set_approvals_reviewer(ApprovalsReviewer::GuardianSubagent);
+        .set_approvals_reviewer(ApprovalsReviewer::AutoReview);
 
     app.update_feature_flags(vec![(Feature::GuardianApproval, false)])
         .await;
@@ -2083,9 +2083,9 @@ async fn update_feature_flags_disabling_guardian_in_profile_keeps_inherited_non_
         .set_enabled(Feature::GuardianApproval, /*enabled*/ true)?;
     app.chat_widget
         .set_feature_enabled(Feature::GuardianApproval, /*enabled*/ true);
-    app.config.approvals_reviewer = ApprovalsReviewer::GuardianSubagent;
+    app.config.approvals_reviewer = ApprovalsReviewer::AutoReview;
     app.chat_widget
-        .set_approvals_reviewer(ApprovalsReviewer::GuardianSubagent);
+        .set_approvals_reviewer(ApprovalsReviewer::AutoReview);
 
     app.update_feature_flags(vec![(Feature::GuardianApproval, false)])
         .await;
@@ -2097,13 +2097,10 @@ async fn update_feature_flags_disabling_guardian_in_profile_keeps_inherited_non_
             .features
             .enabled(Feature::GuardianApproval)
     );
-    assert_eq!(
-        app.config.approvals_reviewer,
-        ApprovalsReviewer::GuardianSubagent
-    );
+    assert_eq!(app.config.approvals_reviewer, ApprovalsReviewer::AutoReview);
     assert_eq!(
         app.chat_widget.config_ref().approvals_reviewer,
-        ApprovalsReviewer::GuardianSubagent
+        ApprovalsReviewer::AutoReview
     );
     assert!(
         op_rx.try_recv().is_err(),
diff --git a/codex-rs/tui/src/chatwidget.rs b/codex-rs/tui/src/chatwidget.rs
index 093ff91aa..e154880fe 100644
--- a/codex-rs/tui/src/chatwidget.rs
+++ b/codex-rs/tui/src/chatwidget.rs
@@ -9042,7 +9042,7 @@ impl ChatWidget {
                             "Same workspace-write permissions as Default, but eligible `on-request` approvals are routed through the auto-reviewer subagent."
                                 .to_string(),
                         ),
-                        is_current: current_review_policy == ApprovalsReviewer::GuardianSubagent
+                        is_current: current_review_policy == ApprovalsReviewer::AutoReview
                             && Self::preset_matches_current(
                                 current_approval,
                                 current_sandbox,
@@ -9052,7 +9052,7 @@ impl ChatWidget {
                             preset.approval,
                             preset.sandbox.clone(),
                             "Auto-review".to_string(),
-                            ApprovalsReviewer::GuardianSubagent,
+                            ApprovalsReviewer::AutoReview,
                         ),
                         dismiss_on_select: true,
                         disabled_reason: approval_disabled_reason
diff --git a/codex-rs/tui/src/chatwidget/tests/permissions.rs b/codex-rs/tui/src/chatwidget/tests/permissions.rs
index 92ca17060..7ea604770 100644
--- a/codex-rs/tui/src/chatwidget/tests/permissions.rs
+++ b/codex-rs/tui/src/chatwidget/tests/permissions.rs
@@ -386,7 +386,7 @@ async fn permissions_selection_emits_history_cell_when_current_is_selected() {
 }
 
 #[tokio::test]
-async fn permissions_selection_hides_guardian_approvals_when_feature_disabled() {
+async fn permissions_selection_hides_auto_review_when_feature_disabled() {
     let (mut chat, _rx, _op_rx) = make_chatwidget_manual(/*model_override*/ None).await;
     #[cfg(target_os = "windows")]
     {
@@ -406,7 +406,7 @@ async fn permissions_selection_hides_guardian_approvals_when_feature_disabled()
 }
 
 #[tokio::test]
-async fn permissions_selection_hides_guardian_approvals_when_feature_disabled_even_if_auto_review_is_active()
+async fn permissions_selection_hides_auto_review_when_feature_disabled_even_if_auto_review_is_active()
  {
     let (mut chat, _rx, _op_rx) = make_chatwidget_manual(/*model_override*/ None).await;
     #[cfg(target_os = "windows")]
@@ -416,7 +416,7 @@ async fn permissions_selection_hides_guardian_approvals_when_feature_disabled_ev
     }
     chat.set_feature_enabled(Feature::GuardianApproval, /*enabled*/ false);
     chat.config.notices.hide_full_access_warning = Some(true);
-    chat.config.approvals_reviewer = ApprovalsReviewer::GuardianSubagent;
+    chat.config.approvals_reviewer = ApprovalsReviewer::AutoReview;
     chat.config
         .permissions
         .approval_policy
@@ -438,7 +438,7 @@ async fn permissions_selection_hides_guardian_approvals_when_feature_disabled_ev
 }
 
 #[tokio::test]
-async fn permissions_selection_marks_guardian_approvals_current_after_session_configured() {
+async fn permissions_selection_marks_auto_review_current_after_session_configured() {
     let (mut chat, _rx, _op_rx) = make_chatwidget_manual(/*model_override*/ None).await;
     #[cfg(target_os = "windows")]
     {
@@ -461,7 +461,7 @@ async fn permissions_selection_marks_guardian_approvals_current_after_session_co
             model_provider_id: "test-provider".to_string(),
             service_tier: None,
             approval_policy: AskForApproval::OnRequest,
-            approvals_reviewer: ApprovalsReviewer::GuardianSubagent,
+            approvals_reviewer: ApprovalsReviewer::AutoReview,
             sandbox_policy: SandboxPolicy::new_workspace_write_policy(),
             cwd: test_project_path().abs(),
             reasoning_effort: None,
@@ -483,8 +483,7 @@ async fn permissions_selection_marks_guardian_approvals_current_after_session_co
 }
 
 #[tokio::test]
-async fn permissions_selection_marks_guardian_approvals_current_with_custom_workspace_write_details()
- {
+async fn permissions_selection_marks_auto_review_current_with_custom_workspace_write_details() {
     let (mut chat, _rx, _op_rx) = make_chatwidget_manual(/*model_override*/ None).await;
     #[cfg(target_os = "windows")]
     {
@@ -509,7 +508,7 @@ async fn permissions_selection_marks_guardian_approvals_current_with_custom_work
             model_provider_id: "test-provider".to_string(),
             service_tier: None,
             approval_policy: AskForApproval::OnRequest,
-            approvals_reviewer: ApprovalsReviewer::GuardianSubagent,
+            approvals_reviewer: ApprovalsReviewer::AutoReview,
             sandbox_policy: SandboxPolicy::WorkspaceWrite {
                 writable_roots: vec![extra_root],
                 read_only_access: ReadOnlyAccess::FullAccess,
@@ -537,7 +536,7 @@ async fn permissions_selection_marks_guardian_approvals_current_with_custom_work
 }
 
 #[tokio::test]
-async fn permissions_selection_can_disable_guardian_approvals() {
+async fn permissions_selection_can_disable_auto_review() {
     let (mut chat, mut rx, _op_rx) = make_chatwidget_manual(/*model_override*/ None).await;
     #[cfg(target_os = "windows")]
     {
@@ -630,7 +629,7 @@ async fn permissions_selection_sends_approvals_reviewer_in_override_turn_context
         Op::OverrideTurnContext {
             cwd: None,
             approval_policy: Some(AskForApproval::OnRequest),
-            approvals_reviewer: Some(ApprovalsReviewer::GuardianSubagent),
+            approvals_reviewer: Some(ApprovalsReviewer::AutoReview),
             sandbox_policy: Some(SandboxPolicy::new_workspace_write_policy()),
             permission_profile: None,
             windows_sandbox_level: None,
diff --git a/codex-rs/tui/src/debug_config.rs b/codex-rs/tui/src/debug_config.rs
index 057611af2..c3383497f 100644
--- a/codex-rs/tui/src/debug_config.rs
+++ b/codex-rs/tui/src/debug_config.rs
@@ -586,7 +586,7 @@ mod tests {
                 Some(RequirementSource::CloudRequirements),
             ),
             approvals_reviewer: ConstrainedWithSource::new(
-                Constrained::allow_any(ApprovalsReviewer::GuardianSubagent),
+                Constrained::allow_any(ApprovalsReviewer::AutoReview),
                 Some(RequirementSource::LegacyManagedConfigTomlFromMdm),
             ),
             sandbox_policy: ConstrainedWithSource::new(
@@ -647,7 +647,7 @@ mod tests {
 
         let requirements_toml = ConfigRequirementsToml {
             allowed_approval_policies: Some(vec![AskForApproval::OnRequest]),
-            allowed_approvals_reviewers: Some(vec![ApprovalsReviewer::GuardianSubagent]),
+            allowed_approvals_reviewers: Some(vec![ApprovalsReviewer::AutoReview]),
             allowed_sandbox_modes: Some(vec![SandboxModeRequirement::ReadOnly]),
             remote_sandbox_config: None,
             allowed_web_search_modes: Some(vec![WebSearchModeRequirement::Cached]),
@@ -731,13 +731,13 @@ mod tests {
     fn debug_config_output_lists_approvals_reviewer_as_requirement() {
         let requirements = ConfigRequirements {
             approvals_reviewer: ConstrainedWithSource::new(
-                Constrained::allow_any(ApprovalsReviewer::GuardianSubagent),
+                Constrained::allow_any(ApprovalsReviewer::AutoReview),
                 Some(RequirementSource::LegacyManagedConfigTomlFromMdm),
             ),
             ..ConfigRequirements::default()
         };
         let requirements_toml = ConfigRequirementsToml {
-            allowed_approvals_reviewers: Some(vec![ApprovalsReviewer::GuardianSubagent]),
+            allowed_approvals_reviewers: Some(vec![ApprovalsReviewer::AutoReview]),
             ..ConfigRequirementsToml::default()
         };
         let stack = ConfigLayerStack::new(Vec::new(), requirements, requirements_toml)