diff --git a/apps/server/src/provider/CodexManagedRuntime.test.ts b/apps/server/src/provider/CodexManagedRuntime.test.ts
index cf95d981d8a5..69d27f1377b6 100644
--- a/apps/server/src/provider/CodexManagedRuntime.test.ts
+++ b/apps/server/src/provider/CodexManagedRuntime.test.ts
@@ -163,6 +163,8 @@ it.effect.each(
             'model_providers.openai_token_sharing.model_catalog_url="https://api.openai.com/v1/models"',
           );
           assert.include(args, "features.api_key_model_discovery=true");
+          assert.include(args, "features.multi_agent=false");
+          assert.include(args, "features.multi_agent_v2=false");
           assert.notInclude(effective.config.launchArgs, "model_catalog_json");
           assert.notInclude(effective.config.launchArgs, "x-openai-chatpass-test");
           assert.include(args, "model_providers.openai_token_sharing.supports_websockets=false");
diff --git a/apps/server/src/provider/CodexManagedRuntime.ts b/apps/server/src/provider/CodexManagedRuntime.ts
index f21cc6c3bcf3..fd8f3d7a9cd9 100644
--- a/apps/server/src/provider/CodexManagedRuntime.ts
+++ b/apps/server/src/provider/CodexManagedRuntime.ts
@@ -22,6 +22,8 @@ const managedCodexLaunchArgs = [
   'model_providers.openai_token_sharing.base_url="https://api.openai.com/v1"',
   'model_providers.openai_token_sharing.model_catalog_url="https://api.openai.com/v1/models"',
   "features.api_key_model_discovery=true",
+  "features.multi_agent=false",
+  "features.multi_agent_v2=false",
   'model_providers.openai_token_sharing.env_key="ACCESS_TOKEN"',
   'model_providers.openai_token_sharing.wire_api="responses"',
   "model_providers.openai_token_sharing.requires_openai_auth=false",