diff --git a/src/commands/configure.ts b/src/commands/configure.ts
index e2b8b6451..d65908f5a 100644
--- a/src/commands/configure.ts
+++ b/src/commands/configure.ts
@@ -323,7 +323,7 @@ async function promptAuthConfig(
       if (oauthCreds) {
         await writeOAuthCredentials("google-antigravity", oauthCreds);
         next = applyAuthProfileConfig(next, {
-          profileId: "google-antigravity:default",
+          profileId: `google-antigravity:${oauthCreds.email ?? "default"}`,
           provider: "google-antigravity",
           mode: "oauth",
         });
diff --git a/src/commands/onboard-auth.ts b/src/commands/onboard-auth.ts
index 3da496b34..8151bfca3 100644
--- a/src/commands/onboard-auth.ts
+++ b/src/commands/onboard-auth.ts
@@ -7,7 +7,7 @@ export async function writeOAuthCredentials(
   creds: OAuthCredentials,
 ): Promise<void> {
   upsertAuthProfile({
-    profileId: `${provider}:default`,
+    profileId: `${provider}:${creds.email ?? "default"}`,
     credential: {
       type: "oauth",
       provider,
diff --git a/src/wizard/onboarding.ts b/src/wizard/onboarding.ts
index 724dfec01..3ce8a0193 100644
--- a/src/wizard/onboarding.ts
+++ b/src/wizard/onboarding.ts
@@ -462,7 +462,7 @@ export async function runOnboardingWizard(
       if (oauthCreds) {
         await writeOAuthCredentials("google-antigravity", oauthCreds);
         nextConfig = applyAuthProfileConfig(nextConfig, {
-          profileId: "google-antigravity:default",
+          profileId: `google-antigravity:${oauthCreds.email ?? "default"}`,
           provider: "google-antigravity",
           mode: "oauth",
         });