diff --git a/packages/nuxt/src/runtime/server/utils/session.ts b/packages/nuxt/src/runtime/server/utils/session.ts
index 90aa54fb..9f7d0518 100644
--- a/packages/nuxt/src/runtime/server/utils/session.ts
+++ b/packages/nuxt/src/runtime/server/utils/session.ts
@@ -42,8 +42,6 @@ export async function createSessionToken(
     /** Unix timestamp (seconds) when the access token expires. */
     accessTokenExpiresAt?: number;
     expirySeconds?: number;
-    /** Raw ID token string. */
-    idToken?: string;
     organizationId?: string;
     /** Refresh token for silent re-auth. */
     refreshToken?: string;
@@ -58,7 +56,6 @@ export async function createSessionToken(
   return new SignJWT({
     accessToken: params.accessToken,
     accessTokenExpiresAt: params.accessTokenExpiresAt,
-    idToken: params.idToken,
     organizationId: params.organizationId,
     refreshToken: params.refreshToken,
     scopes: params.scopes,
@@ -201,7 +198,6 @@ export async function issueSessionCookie(
     {
       accessToken: tokenResponse.accessToken,
       accessTokenExpiresAt,
-      idToken: tokenResponse.idToken || undefined,
       organizationId,
       refreshToken: tokenResponse.refreshToken || undefined,
       scopes: tokenResponse.scope || '',
diff --git a/packages/nuxt/tests/unit/session-manager.test.ts b/packages/nuxt/tests/unit/session-manager.test.ts
index e5c161d4..8bfb36e6 100644
--- a/packages/nuxt/tests/unit/session-manager.test.ts
+++ b/packages/nuxt/tests/unit/session-manager.test.ts
@@ -141,7 +141,7 @@ describe('createTempSessionToken / verifyTempSessionToken', () => {
   });
 });
 
-describe('createSessionToken — Phase 2 fields (accessTokenExpiresAt / refreshToken / idToken)', () => {
+describe('createSessionToken — Phase 2 fields (accessTokenExpiresAt / refreshToken)', () => {
   it('round-trips accessTokenExpiresAt', async () => {
     const expiresAt = Math.floor(Date.now() / 1000) + 3600;
     const token = await createSessionToken(
@@ -158,7 +158,6 @@ describe('createSessionToken — Phase 2 fields (accessTokenExpiresAt / refreshT
     const payload = await verifySessionToken(token, TEST_SECRET);
     expect(payload.accessTokenExpiresAt).toBe(expiresAt);
     expect(payload.refreshToken).toBeUndefined();
-    expect(payload.idToken).toBeUndefined();
   });
 
   it('round-trips refreshToken', async () => {
@@ -177,24 +176,7 @@ describe('createSessionToken — Phase 2 fields (accessTokenExpiresAt / refreshT
     expect(payload.refreshToken).toBe('rt_test_value');
   });
 
-  it('round-trips idToken', async () => {
-    const fakeIdToken = 'header.payload.signature';
-    const token = await createSessionToken(
-      {
-        accessToken: 'at',
-        userId: 'u',
-        sessionId: 's',
-        scopes: 'openid',
-        idToken: fakeIdToken,
-      },
-      TEST_SECRET,
-    );
-
-    const payload = await verifySessionToken(token, TEST_SECRET);
-    expect(payload.idToken).toBe(fakeIdToken);
-  });
-
-  it('round-trips all three Phase 2 fields together', async () => {
+  it('round-trips Phase 2 fields together', async () => {
     const expiresAt = Math.floor(Date.now() / 1000) + 1800;
     const token = await createSessionToken(
       {
@@ -205,7 +187,6 @@ describe('createSessionToken — Phase 2 fields (accessTokenExpiresAt / refreshT
         organizationId: 'org-123',
         accessTokenExpiresAt: expiresAt,
         refreshToken: 'rt_full',
-        idToken: 'idt_full',
       },
       TEST_SECRET,
     );
@@ -217,7 +198,6 @@ describe('createSessionToken — Phase 2 fields (accessTokenExpiresAt / refreshT
     expect(payload.organizationId).toBe('org-123');
     expect(payload.accessTokenExpiresAt).toBe(expiresAt);
     expect(payload.refreshToken).toBe('rt_full');
-    expect(payload.idToken).toBe('idt_full');
   });
 
   it('omits Phase 2 fields when not provided (backward-compat)', async () => {
@@ -230,6 +210,5 @@ describe('createSessionToken — Phase 2 fields (accessTokenExpiresAt / refreshT
     const payload = await verifySessionToken(token, TEST_SECRET);
     expect(payload.accessTokenExpiresAt).toBeUndefined();
     expect(payload.refreshToken).toBeUndefined();
-    expect(payload.idToken).toBeUndefined();
   });
 });