diff --git a/apps/mobile/src/features/threads/NewTaskDraftScreen.tsx b/apps/mobile/src/features/threads/NewTaskDraftScreen.tsx
index ce81db8c486..e328bcef00e 100644
--- a/apps/mobile/src/features/threads/NewTaskDraftScreen.tsx
+++ b/apps/mobile/src/features/threads/NewTaskDraftScreen.tsx
@@ -582,10 +582,13 @@ export function NewTaskDraftScreen(props: {
             ? "Approve actions"
             : flow.runtimeMode === "auto-accept-edits"
               ? "Auto-accept edits"
-              : "Full access",
+              : flow.runtimeMode === "auto"
+                ? "Auto"
+                : "Full access",
         subactions: [
           { id: "options:runtime:approval-required", title: "Approve actions" },
           { id: "options:runtime:auto-accept-edits", title: "Auto-accept edits" },
+          { id: "options:runtime:auto", title: "Auto" },
           { id: "options:runtime:full-access", title: "Full access" },
         ].map((option) => {
           const value = option.id.replace("options:runtime:", "");
diff --git a/apps/mobile/src/features/threads/ThreadComposer.tsx b/apps/mobile/src/features/threads/ThreadComposer.tsx
index e712664d30a..9c9a90f7a6f 100644
--- a/apps/mobile/src/features/threads/ThreadComposer.tsx
+++ b/apps/mobile/src/features/threads/ThreadComposer.tsx
@@ -627,10 +627,13 @@ export const ThreadComposer = memo(function ThreadComposer(props: ThreadComposer
             ? "Approve actions"
             : currentRuntimeMode === "auto-accept-edits"
               ? "Auto-accept edits"
-              : "Full access",
+              : currentRuntimeMode === "auto"
+                ? "Auto"
+                : "Full access",
         subactions: [
           { id: "options:runtime:approval-required", title: "Approve actions" },
           { id: "options:runtime:auto-accept-edits", title: "Auto-accept edits" },
+          { id: "options:runtime:auto", title: "Auto" },
           { id: "options:runtime:full-access", title: "Full access" },
         ].map((option) => {
           const value = option.id.replace("options:runtime:", "");
diff --git a/apps/server/src/provider/Layers/ClaudeAdapter.test.ts b/apps/server/src/provider/Layers/ClaudeAdapter.test.ts
index 2735b69a187..ba8b1b848a8 100644
--- a/apps/server/src/provider/Layers/ClaudeAdapter.test.ts
+++ b/apps/server/src/provider/Layers/ClaudeAdapter.test.ts
@@ -356,6 +356,25 @@ describe("ClaudeAdapterLive", () => {
     );
   });
 
+  it.effect("derives auto permission mode from auto runtime policy without skip flag", () => {
+    const harness = makeHarness();
+    return Effect.gen(function* () {
+      const adapter = yield* ClaudeAdapter;
+      yield* adapter.startSession({
+        threadId: THREAD_ID,
+        provider: ProviderDriverKind.make("claudeAgent"),
+        runtimeMode: "auto",
+      });
+
+      const createInput = harness.getLastCreateQueryInput();
+      assert.equal(createInput?.options.permissionMode, "auto");
+      assert.equal(createInput?.options.allowDangerouslySkipPermissions, undefined);
+    }).pipe(
+      Effect.provideService(Random.Random, makeDeterministicRandomService()),
+      Effect.provide(harness.layer),
+    );
+  });
+
   it.effect("loads Claude filesystem settings sources for SDK sessions", () => {
     const harness = makeHarness();
     return Effect.gen(function* () {
diff --git a/apps/server/src/provider/Layers/ClaudeAdapter.ts b/apps/server/src/provider/Layers/ClaudeAdapter.ts
index 757d7a00eb2..285d9dac608 100644
--- a/apps/server/src/provider/Layers/ClaudeAdapter.ts
+++ b/apps/server/src/provider/Layers/ClaudeAdapter.ts
@@ -3509,6 +3509,7 @@ export const makeClaudeAdapter = Effect.fn("makeClaudeAdapter")(function* (
       const effectiveEffort = getEffectiveClaudeAgentEffort(effort, modelSelection?.model);
       const runtimeModeToPermission: Record<string, PermissionMode> = {
         "auto-accept-edits": "acceptEdits",
+        auto: "auto",
         "full-access": "bypassPermissions",
       };
       const permissionMode = runtimeModeToPermission[input.runtimeMode];
diff --git a/apps/server/src/provider/Layers/CodexSessionRuntime.test.ts b/apps/server/src/provider/Layers/CodexSessionRuntime.test.ts
index 119fa36303a..d7346a0e0db 100644
--- a/apps/server/src/provider/Layers/CodexSessionRuntime.test.ts
+++ b/apps/server/src/provider/Layers/CodexSessionRuntime.test.ts
@@ -104,6 +104,7 @@ describe("buildTurnStartParams", () => {
     NodeAssert.deepStrictEqual(params, {
       threadId: "provider-thread-1",
       approvalPolicy: "never",
+      approvalsReviewer: "user",
       sandboxPolicy: {
         type: "dangerFullAccess",
       },
@@ -149,6 +150,7 @@ describe("buildTurnStartParams", () => {
     NodeAssert.deepStrictEqual(params, {
       threadId: "provider-thread-1",
       approvalPolicy: "on-request",
+      approvalsReviewer: "user",
       sandboxPolicy: {
         type: "workspaceWrite",
       },
@@ -193,6 +195,31 @@ describe("buildTurnStartParams", () => {
     NodeAssert.ok(settings?.developer_instructions?.includes(`as ${DEFAULT_MODEL} with medium`));
   });
 
+  it.effect("routes approvals to the auto reviewer in auto mode", () =>
+    Effect.gen(function* () {
+      const params = yield* buildTurnStartParams({
+        threadId: "provider-thread-1",
+        runtimeMode: "auto",
+        prompt: "Ship it",
+      });
+
+      NodeAssert.deepStrictEqual(params, {
+        threadId: "provider-thread-1",
+        approvalPolicy: "on-request",
+        approvalsReviewer: "auto_review",
+        sandboxPolicy: {
+          type: "workspaceWrite",
+        },
+        input: [
+          {
+            type: "text",
+            text: "Ship it",
+          },
+        ],
+      });
+    }),
+  );
+
   it("omits collaboration mode when interaction mode is absent", () => {
     const params = Effect.runSync(
       buildTurnStartParams({
@@ -205,6 +232,7 @@ describe("buildTurnStartParams", () => {
     NodeAssert.deepStrictEqual(params, {
       threadId: "provider-thread-1",
       approvalPolicy: "untrusted",
+      approvalsReviewer: "user",
       sandboxPolicy: {
         type: "readOnly",
       },
diff --git a/apps/server/src/provider/Layers/CodexSessionRuntime.ts b/apps/server/src/provider/Layers/CodexSessionRuntime.ts
index 5a81e915e34..67108dd4dbb 100644
--- a/apps/server/src/provider/Layers/CodexSessionRuntime.ts
+++ b/apps/server/src/provider/Layers/CodexSessionRuntime.ts
@@ -264,23 +264,35 @@ function readResumeCursorThreadId(
 function runtimeModeToThreadConfig(input: RuntimeMode): {
   readonly approvalPolicy: EffectCodexSchema.V2ThreadStartParams__AskForApproval;
   readonly sandbox: EffectCodexSchema.V2ThreadStartParams__SandboxMode;
+  // Always explicit: omitting the field on resume keeps the thread's previous
+  // reviewer, which would leave auto_review sticky after switching modes.
+  readonly approvalsReviewer: EffectCodexSchema.V2ThreadStartParams__ApprovalsReviewer;
 } {
   switch (input) {
     case "approval-required":
       return {
         approvalPolicy: "untrusted",
         sandbox: "read-only",
+        approvalsReviewer: "user",
       };
     case "auto-accept-edits":
       return {
         approvalPolicy: "on-request",
         sandbox: "workspace-write",
+        approvalsReviewer: "user",
+      };
+    case "auto":
+      return {
+        approvalPolicy: "on-request",
+        sandbox: "workspace-write",
+        approvalsReviewer: "auto_review",
       };
     case "full-access":
     default:
       return {
         approvalPolicy: "never",
         sandbox: "danger-full-access",
+        approvalsReviewer: "user",
       };
   }
 }
@@ -296,6 +308,7 @@ function buildThreadStartParams(input: {
     cwd: input.cwd,
     approvalPolicy: config.approvalPolicy,
     sandbox: config.sandbox,
+    approvalsReviewer: config.approvalsReviewer,
     ...(input.model ? { model: input.model } : {}),
     ...(input.serviceTier ? { serviceTier: input.serviceTier } : {}),
   };
@@ -310,6 +323,7 @@ function runtimeModeToTurnSandboxPolicy(
         type: "readOnly",
       };
     case "auto-accept-edits":
+    case "auto":
       return {
         type: "workspaceWrite",
       };
@@ -382,6 +396,7 @@ export function buildTurnStartParams(input: {
     threadId: input.threadId,
     input: turnInput,
     approvalPolicy: config.approvalPolicy,
+    approvalsReviewer: config.approvalsReviewer,
     sandboxPolicy: runtimeModeToTurnSandboxPolicy(input.runtimeMode),
     ...(input.model ? { model: input.model } : {}),
     ...(input.serviceTier ? { serviceTier: input.serviceTier } : {}),
diff --git a/apps/web/src/components/chat/ChatComposer.tsx b/apps/web/src/components/chat/ChatComposer.tsx
index 94e4af3bba6..ac137c8b075 100644
--- a/apps/web/src/components/chat/ChatComposer.tsx
+++ b/apps/web/src/components/chat/ChatComposer.tsx
@@ -107,6 +107,7 @@ import {
   LockIcon,
   LockOpenIcon,
   PenLineIcon,
+  SparklesIcon,
   XIcon,
 } from "lucide-react";
 import { proposedPlanTitle } from "../../proposedPlan";
@@ -148,6 +149,11 @@ const runtimeModeConfig: Record<
     description: "Auto-approve edits, ask before other actions.",
     icon: PenLineIcon,
   },
+  auto: {
+    label: "Auto",
+    description: "An AI reviewer approves routine actions; risky ones still ask.",
+    icon: SparklesIcon,
+  },
   "full-access": {
     label: "Full access",
     description: "Allow commands and edits without prompts.",
diff --git a/apps/web/src/components/chat/CompactComposerControlsMenu.tsx b/apps/web/src/components/chat/CompactComposerControlsMenu.tsx
index f1fbd193a63..b808f562920 100644
--- a/apps/web/src/components/chat/CompactComposerControlsMenu.tsx
+++ b/apps/web/src/components/chat/CompactComposerControlsMenu.tsx
@@ -71,6 +71,7 @@ export const CompactComposerControlsMenu = memo(function CompactComposerControls
         >
           <MenuRadioItem value="approval-required">Supervised</MenuRadioItem>
           <MenuRadioItem value="auto-accept-edits">Auto-accept edits</MenuRadioItem>
+          <MenuRadioItem value="auto">Auto</MenuRadioItem>
           <MenuRadioItem value="full-access">Full access</MenuRadioItem>
         </MenuRadioGroup>
         {props.activePlan ? (
diff --git a/packages/contracts/src/orchestration.ts b/packages/contracts/src/orchestration.ts
index b01df310062..e1ddbdbd0cc 100644
--- a/packages/contracts/src/orchestration.ts
+++ b/packages/contracts/src/orchestration.ts
@@ -117,6 +117,7 @@ export type ModelSelection = typeof ModelSelection.Type;
 export const RuntimeMode = Schema.Literals([
   "approval-required",
   "auto-accept-edits",
+  "auto",
   "full-access",
 ]);
 export type RuntimeMode = typeof RuntimeMode.Type;