diff --git a/codex-rs/app-server/src/codex_message_processor.rs b/codex-rs/app-server/src/codex_message_processor.rs
index e7a90186e6..c5978c7d38 100644
--- a/codex-rs/app-server/src/codex_message_processor.rs
+++ b/codex-rs/app-server/src/codex_message_processor.rs
@@ -9294,6 +9294,7 @@ fn merge_persisted_resume_metadata(
     }
 
     typesafe_overrides.model = persisted_metadata.model.clone();
+    typesafe_overrides.model_provider = Some(persisted_metadata.model_provider.clone());
 
     if let Some(reasoning_effort) = persisted_metadata.reasoning_effort {
         request_overrides.get_or_insert_with(HashMap::new).insert(
@@ -10991,6 +10992,10 @@ mod tests {
             typesafe_overrides.model,
             Some("gpt-5.1-codex-max".to_string())
         );
+        assert_eq!(
+            typesafe_overrides.model_provider,
+            Some("mock_provider".to_string())
+        );
         assert_eq!(
             request_overrides,
             Some(HashMap::from([(
@@ -11021,6 +11026,7 @@ mod tests {
         );
 
         assert_eq!(typesafe_overrides.model, Some("gpt-5.2-codex".to_string()));
+        assert_eq!(typesafe_overrides.model_provider, None);
         assert_eq!(
             request_overrides,
             Some(HashMap::from([(
@@ -11049,6 +11055,7 @@ mod tests {
         );
 
         assert_eq!(typesafe_overrides.model, None);
+        assert_eq!(typesafe_overrides.model_provider, None);
         assert_eq!(
             request_overrides,
             Some(HashMap::from([(
@@ -11100,6 +11107,7 @@ mod tests {
         );
 
         assert_eq!(typesafe_overrides.model, None);
+        assert_eq!(typesafe_overrides.model_provider, None);
         assert_eq!(
             request_overrides,
             Some(HashMap::from([(
@@ -11124,6 +11132,10 @@ mod tests {
         );
 
         assert_eq!(typesafe_overrides.model, None);
+        assert_eq!(
+            typesafe_overrides.model_provider,
+            Some("mock_provider".to_string())
+        );
         assert_eq!(request_overrides, None);
         Ok(())
     }
diff --git a/codex-rs/app-server/tests/suite/v2/remote_thread_store.rs b/codex-rs/app-server/tests/suite/v2/remote_thread_store.rs
index ebee1fd7c1..7556f4cd14 100644
--- a/codex-rs/app-server/tests/suite/v2/remote_thread_store.rs
+++ b/codex-rs/app-server/tests/suite/v2/remote_thread_store.rs
@@ -54,6 +54,8 @@ async fn thread_start_with_non_local_thread_store_does_not_create_local_persiste
     let server = create_mock_responses_server_repeating_assistant("Done").await;
     let codex_home = TempDir::new()?;
     let store_id = Uuid::new_v4().to_string();
+    // Plugin startup warmups may create `.tmp` under codex_home. Disable them
+    // here so this regression stays focused on thread persistence artifacts.
     create_config_toml_with_thread_store(codex_home.path(), &server.uri(), &store_id)?;
 
     let loader_overrides = LoaderOverrides::without_managed_config_for_tests();
@@ -248,6 +250,9 @@ base_url = "{server_uri}/v1"
 wire_api = "responses"
 request_max_retries = 0
 stream_max_retries = 0
+
+[features]
+plugins = false
 "#
         ),
     )