Allow injecting the models manager into ThreadManager (#32911)

## Why

Embedding callers need to control whether model catalogs are persisted to disk.

## What changed

- Accept a shared models manager when constructing `ThreadManager` instead of always creating a cached manager internally.
- Add provider APIs for creating uncached model managers. OpenAI-compatible providers fetch on each `OnlineIfUncached` refresh without reading or writing `models_cache.json`.
- Keep existing app server, MCP server, sample, and test callers on the standard cached manager.

## Testing

- Verify an uncached manager fetches on every refresh.
- Verify an injected uncached manager controls thread refresh behavior and does not create `models_cache.json`.

GitOrigin-RevId: 8bb646054ecec4ccb865b2bf56249384916ea9db

codex-rs/core/src/agent/control_tests.rs

@@ -2393,9 +2393,11 @@ async fn spawn_thread_subagent_uses_role_specific_nickname_candidates() {
 async fn resume_thread_subagent_restores_stored_metadata() {
     let (home, config) = test_config().await;
     let thread_store = Arc::new(InMemoryThreadStore::default());
+    let auth_manager = AuthManager::from_auth_for_testing(CodexAuth::from_api_key("dummy"));
     let manager = ThreadManager::new(
         &config,
-        AuthManager::from_auth_for_testing(CodexAuth::from_api_key("dummy")),
+        auth_manager.clone(),
+        crate::thread_manager::build_models_manager(&config, auth_manager),
         SessionSource::Exec,
         Arc::new(codex_exec_server::EnvironmentManager::default_for_tests()),
         empty_extension_registry(),

codex-rs/core/src/prompt_debug.rs

@@ -44,6 +44,7 @@ pub async fn build_prompt_input(
     let thread_manager = ThreadManager::new(
         &config,
         Arc::clone(&auth_manager),
+        crate::thread_manager::build_models_manager(&config, Arc::clone(&auth_manager)),
         SessionSource::Exec,
         Arc::new(
             EnvironmentManager::from_codex_home(

codex-rs/core/src/thread_manager.rs

@@ -305,6 +305,7 @@ impl ThreadManager {
     pub fn new(
         config: &Config,
         auth_manager: Arc<AuthManager>,
+        models_manager: SharedModelsManager,
         session_source: SessionSource,
         environment_manager: Arc<EnvironmentManager>,
         extensions: Arc<ExtensionRegistry<Config>>,
@@ -337,7 +338,7 @@ impl ThreadManager {
             state: Arc::new(ThreadManagerState {
                 threads: Arc::new(RwLock::new(HashMap::new())),
                 thread_created_tx,
-                models_manager: build_models_manager(config, auth_manager.clone()),
+                models_manager,
                 environment_manager,
                 skills_service,
                 plugins_manager,

codex-rs/core/src/thread_manager_tests.rs

@@ -596,9 +596,12 @@ async fn start_thread_seeds_extension_data_for_mcp_and_lifecycle_contributors()
     let mut extensions = codex_extension_api::ExtensionRegistryBuilder::new();
     extensions.thread_lifecycle_contributor(recorder.clone());
     extensions.mcp_server_contributor(recorder);
+    let auth_manager =
+        AuthManager::from_auth_for_testing(CodexAuth::create_dummy_chatgpt_auth_for_testing());
     let manager = ThreadManager::new(
         &config,
-        AuthManager::from_auth_for_testing(CodexAuth::create_dummy_chatgpt_auth_for_testing()),
+        auth_manager.clone(),
+        build_models_manager(&config, auth_manager),
         SessionSource::Exec,
         Arc::new(codex_exec_server::EnvironmentManager::default_for_tests()),
         Arc::new(extensions.build()),
@@ -818,6 +821,7 @@ async fn resume_and_fork_do_not_restore_thread_environments_from_rollout() {
     let manager = ThreadManager::new(
         &config,
         auth_manager.clone(),
+        build_models_manager(&config, auth_manager.clone()),
         SessionSource::Exec,
         Arc::new(codex_exec_server::EnvironmentManager::default_for_tests()),
         empty_extension_registry(),
@@ -943,7 +947,8 @@ async fn explicit_installation_id_skips_codex_home_file() {
     let thread_store = thread_store_from_config(&config, state_db.clone());
     let manager = ThreadManager::new(
         &config,
-        auth_manager,
+        auth_manager.clone(),
+        build_models_manager(&config, auth_manager),
         SessionSource::Exec,
         Arc::new(codex_exec_server::EnvironmentManager::default_for_tests()),
         empty_extension_registry(),
@@ -985,6 +990,7 @@ async fn resume_active_thread_from_rollout_returns_running_thread() {
     let manager = ThreadManager::new(
         &config,
         auth_manager.clone(),
+        build_models_manager(&config, auth_manager.clone()),
         SessionSource::Exec,
         Arc::new(codex_exec_server::EnvironmentManager::default_for_tests()),
         empty_extension_registry(),
@@ -1045,6 +1051,7 @@ async fn resume_stopped_thread_from_rollout_spawns_new_thread() {
     let manager = ThreadManager::new(
         &config,
         auth_manager.clone(),
+        build_models_manager(&config, auth_manager.clone()),
         SessionSource::Exec,
         Arc::new(codex_exec_server::EnvironmentManager::default_for_tests()),
         empty_extension_registry(),
@@ -1112,6 +1119,7 @@ async fn resume_stopped_thread_from_rollout_preserves_thread_source() {
     let manager = ThreadManager::new(
         &config,
         auth_manager.clone(),
+        build_models_manager(&config, auth_manager.clone()),
         SessionSource::Exec,
         Arc::new(codex_exec_server::EnvironmentManager::default_for_tests()),
         empty_extension_registry(),
@@ -1203,7 +1211,8 @@ async fn subtree_listing_uses_injected_graph_store_without_state_db() {
         AuthManager::from_auth_for_testing(CodexAuth::create_dummy_chatgpt_auth_for_testing());
     let manager = ThreadManager::new(
         &config,
-        auth_manager,
+        auth_manager.clone(),
+        build_models_manager(&config, auth_manager),
         SessionSource::Exec,
         Arc::new(codex_exec_server::EnvironmentManager::default_for_tests()),
         empty_extension_registry(),
@@ -1249,6 +1258,7 @@ async fn rollout_path_resume_and_fork_read_history_through_thread_store() {
     let manager = ThreadManager::new(
         &config,
         auth_manager.clone(),
+        build_models_manager(&config, auth_manager.clone()),
         SessionSource::Exec,
         Arc::new(codex_exec_server::EnvironmentManager::default_for_tests()),
         empty_extension_registry(),
@@ -1353,7 +1363,8 @@ async fn new_uses_active_provider_for_model_refresh() {
         AuthManager::from_auth_for_testing(CodexAuth::create_dummy_chatgpt_auth_for_testing());
     let manager = ThreadManager::new(
         &config,
-        auth_manager,
+        auth_manager.clone(),
+        build_models_manager(&config, auth_manager),
         SessionSource::Exec,
         Arc::new(codex_exec_server::EnvironmentManager::default_for_tests()),
         empty_extension_registry(),
@@ -1375,6 +1386,61 @@ async fn new_uses_active_provider_for_model_refresh() {
     assert_eq!(models_mock.requests().len(), 1);
 }
 
+#[tokio::test]
+async fn injected_models_manager_controls_refresh_policy() {
+    let server = MockServer::start().await;
+    let _ = mount_models_once(&server, ModelsResponse { models: vec![] }).await;
+    let _ = mount_models_once(&server, ModelsResponse { models: vec![] }).await;
+
+    let temp_dir = tempdir().expect("tempdir");
+    let mut config = test_config().await;
+    config.codex_home = temp_dir.path().join("codex-home").abs();
+    config.cwd = config.codex_home.abs();
+    std::fs::create_dir_all(&config.codex_home).expect("create codex home");
+    config.model_catalog = None;
+    config.model_provider.base_url = Some(server.uri());
+
+    let auth_manager =
+        AuthManager::from_auth_for_testing(CodexAuth::create_dummy_chatgpt_auth_for_testing());
+    let provider = create_model_provider(
+        config.model_provider.clone(),
+        Some(Arc::clone(&auth_manager)),
+    );
+    let models_manager = provider.models_manager_without_cache(config.model_catalog.clone());
+    let manager = ThreadManager::new(
+        &config,
+        auth_manager,
+        models_manager,
+        SessionSource::Custom("test-embedder".to_string()),
+        Arc::new(codex_exec_server::EnvironmentManager::default_for_tests()),
+        empty_extension_registry(),
+        Arc::new(crate::test_support::EmptyUserInstructionsProvider),
+        /*analytics_events_client*/ None,
+        thread_store_from_config(&config, /*state_db*/ None),
+        /*agent_graph_store*/ None,
+        TEST_INSTALLATION_ID.to_string(),
+        /*attestation_provider*/ None,
+        /*external_time_provider*/ None,
+    );
+
+    let http_client_factory = crate::test_support::default_http_client_factory();
+    let _ = manager
+        .list_models(
+            RefreshStrategy::OnlineIfUncached,
+            http_client_factory.clone(),
+        )
+        .await;
+    let _ = manager
+        .list_models(RefreshStrategy::OnlineIfUncached, http_client_factory)
+        .await;
+
+    assert_eq!(
+        server.received_requests().await.unwrap_or_default().len(),
+        2
+    );
+    assert!(!config.codex_home.join("models_cache.json").exists());
+}
+
 #[test]
 fn interrupted_fork_snapshot_appends_interrupt_boundary() {
     let committed_history =
@@ -1593,6 +1659,7 @@ async fn interrupted_fork_snapshot_does_not_synthesize_turn_id_for_legacy_histor
     let manager = ThreadManager::new(
         &config,
         auth_manager.clone(),
+        build_models_manager(&config, auth_manager.clone()),
         SessionSource::Exec,
         Arc::new(codex_exec_server::EnvironmentManager::default_for_tests()),
         empty_extension_registry(),
@@ -1703,6 +1770,7 @@ async fn interrupted_fork_snapshot_preserves_explicit_turn_id() {
     let manager = ThreadManager::new(
         &config,
         auth_manager.clone(),
+        build_models_manager(&config, auth_manager.clone()),
         SessionSource::Exec,
         Arc::new(codex_exec_server::EnvironmentManager::default_for_tests()),
         empty_extension_registry(),
@@ -1804,6 +1872,7 @@ async fn interrupted_fork_snapshot_uses_persisted_mid_turn_history_without_live_
     let manager = ThreadManager::new(
         &config,
         auth_manager.clone(),
+        build_models_manager(&config, auth_manager.clone()),
         SessionSource::Exec,
         Arc::new(codex_exec_server::EnvironmentManager::default_for_tests()),
         empty_extension_registry(),

codex-rs/core/src/tools/handlers/multi_agents_tests.rs

@@ -4293,9 +4293,11 @@ async fn tool_handlers_cascade_close_and_resume_and_keep_explicitly_closed_subtr
         .enable(Feature::Sqlite)
         .expect("test config should allow sqlite");
     let state_db = init_state_db(&config).await;
+    let auth_manager = AuthManager::from_auth_for_testing(CodexAuth::from_api_key("dummy"));
     let manager = ThreadManager::new(
         &config,
-        AuthManager::from_auth_for_testing(CodexAuth::from_api_key("dummy")),
+        auth_manager.clone(),
+        crate::thread_manager::build_models_manager(&config, auth_manager),
         SessionSource::Exec,
         Arc::new(codex_exec_server::EnvironmentManager::default_for_tests()),
         empty_extension_registry(),