fix

codex-rs/tui/src/app.rs

@@ -709,7 +709,10 @@ impl App {
         if let Some(updated_model) = config.model.clone() {
             model = updated_model;
         }
-        let model_catalog = Arc::new(ModelCatalog::new(available_models.clone()));
+        let model_catalog = Arc::new(ModelCatalog::new(
+            available_models.clone(),
+            bootstrap.collaboration_modes,
+        ));
         let feedback_audience = bootstrap.feedback_audience;
         let auth_mode = bootstrap.auth_mode;
         let has_chatgpt_account = bootstrap.has_chatgpt_account;

codex-rs/tui/src/app_server_session.rs

@@ -18,6 +18,9 @@ use codex_app_server_protocol::Account;
 use codex_app_server_protocol::AskForApproval;
 use codex_app_server_protocol::AuthMode;
 use codex_app_server_protocol::ClientRequest;
+use codex_app_server_protocol::CollaborationModeListParams;
+use codex_app_server_protocol::CollaborationModeListResponse;
+use codex_app_server_protocol::CollaborationModeMask as ApiCollaborationModeMask;
 use codex_app_server_protocol::ConfigBatchWriteParams;
 use codex_app_server_protocol::ConfigWriteResponse;
 use codex_app_server_protocol::ExternalAgentConfigDetectParams;
@@ -101,9 +104,11 @@ use codex_app_server_protocol::TurnStartResponse;
 use codex_app_server_protocol::TurnSteerParams;
 use codex_app_server_protocol::TurnSteerResponse;
 use codex_app_server_protocol::UserInput;
+use codex_models_manager::collaboration_mode_presets::builtin_collaboration_mode_presets;
 use codex_otel::TelemetryAuthMode;
 use codex_protocol::ThreadId;
 use codex_protocol::approvals::GuardianAssessmentEvent;
+use codex_protocol::config_types::CollaborationModeMask;
 use codex_protocol::models::ActivePermissionProfile;
 use codex_protocol::models::ActivePermissionProfileModification;
 use codex_protocol::models::PermissionProfile;
@@ -120,10 +125,26 @@ use color_eyre::eyre::WrapErr;
 use std::collections::HashMap;
 use std::path::PathBuf;
 
+const JSONRPC_INVALID_REQUEST_ERROR_CODE: i64 = -32600;
+const JSONRPC_METHOD_NOT_FOUND_ERROR_CODE: i64 = -32601;
+
 fn bootstrap_request_error(context: &'static str, err: TypedRequestError) -> color_eyre::Report {
     color_eyre::eyre::eyre!("{context}: {err}")
 }
 
+fn is_missing_collaboration_mode_list_error(err: &TypedRequestError) -> bool {
+    match err {
+        TypedRequestError::Server { method, source } => {
+            method == "collaborationMode/list"
+                && (source.code == JSONRPC_METHOD_NOT_FOUND_ERROR_CODE
+                    || (source.code == JSONRPC_INVALID_REQUEST_ERROR_CODE
+                        && source.message.contains("collaborationMode/list")
+                        && source.message.contains("unknown variant")))
+        }
+        TypedRequestError::Transport { .. } | TypedRequestError::Deserialize { .. } => false,
+    }
+}
+
 /// Data collected during the TUI bootstrap phase that the main event loop
 /// needs to configure the UI, telemetry, and initial rate-limit prefetch.
 ///
@@ -143,6 +164,7 @@ pub(crate) struct AppServerBootstrap {
     pub(crate) feedback_audience: FeedbackAudience,
     pub(crate) has_chatgpt_account: bool,
     pub(crate) available_models: Vec<ModelPreset>,
+    pub(crate) collaboration_modes: Vec<CollaborationModeMask>,
 }
 
 pub(crate) struct AppServerSession {
@@ -215,6 +237,37 @@ impl AppServerSession {
             .into_iter()
             .map(model_preset_from_api_model)
             .collect::<Vec<_>>();
+        let collaboration_modes_request_id = self.next_request_id();
+        let collaboration_modes_response: std::result::Result<
+            CollaborationModeListResponse,
+            TypedRequestError,
+        > = self
+            .client
+            .request_typed(ClientRequest::CollaborationModeList {
+                request_id: collaboration_modes_request_id,
+                params: CollaborationModeListParams::default(),
+            })
+            .await;
+        let collaboration_modes = match collaboration_modes_response {
+            Ok(collaboration_modes) => collaboration_modes
+                .data
+                .into_iter()
+                .map(collaboration_mode_mask_from_api_mask)
+                .collect::<Vec<_>>(),
+            Err(err) if self.is_remote() && is_missing_collaboration_mode_list_error(&err) => {
+                tracing::debug!(
+                    %err,
+                    "remote app-server does not support collaborationMode/list; using built-in collaboration modes"
+                );
+                builtin_collaboration_mode_presets()
+            }
+            Err(err) => {
+                return Err(bootstrap_request_error(
+                    "collaborationMode/list failed during TUI bootstrap",
+                    err,
+                ));
+            }
+        };
         let default_model = config
             .model
             .clone()
@@ -276,6 +329,7 @@ impl AppServerSession {
             feedback_audience,
             has_chatgpt_account,
             available_models,
+            collaboration_modes,
         })
     }
 
@@ -1067,6 +1121,16 @@ fn model_preset_from_api_model(model: ApiModel) -> ModelPreset {
     }
 }
 
+fn collaboration_mode_mask_from_api_mask(mask: ApiCollaborationModeMask) -> CollaborationModeMask {
+    CollaborationModeMask {
+        name: mask.name,
+        mode: mask.mode,
+        model: mask.model,
+        reasoning_effort: mask.reasoning_effort,
+        developer_instructions: None,
+    }
+}
+
 fn approvals_reviewer_override_from_config(
     config: &Config,
 ) -> Option<codex_app_server_protocol::ApprovalsReviewer> {
@@ -1581,6 +1645,39 @@ mod tests {
             .expect("config should build")
     }
 
+    fn collaboration_mode_list_server_error(code: i64, message: &str) -> TypedRequestError {
+        TypedRequestError::Server {
+            method: "collaborationMode/list".to_string(),
+            source: JSONRPCErrorError {
+                code,
+                message: message.to_string(),
+                data: None,
+            },
+        }
+    }
+
+    #[test]
+    fn detects_missing_collaboration_mode_list_errors() {
+        assert!(is_missing_collaboration_mode_list_error(
+            &collaboration_mode_list_server_error(
+                JSONRPC_METHOD_NOT_FOUND_ERROR_CODE,
+                "Method not found"
+            )
+        ));
+        assert!(is_missing_collaboration_mode_list_error(
+            &collaboration_mode_list_server_error(
+                JSONRPC_INVALID_REQUEST_ERROR_CODE,
+                "Invalid request: unknown variant `collaborationMode/list`"
+            )
+        ));
+        assert!(!is_missing_collaboration_mode_list_error(
+            &collaboration_mode_list_server_error(
+                JSONRPC_INVALID_REQUEST_ERROR_CODE,
+                "Experimental API `collaborationMode/list` is not enabled"
+            )
+        ));
+    }
+
     #[tokio::test]
     async fn thread_start_params_include_cwd_for_embedded_sessions() {
         let temp_dir = tempfile::tempdir().expect("tempdir");

codex-rs/tui/src/chatwidget/tests/helpers.rs

@@ -1,5 +1,6 @@
 use super::*;
 use codex_app_server_protocol::PluginAvailability;
+use codex_protocol::config_types::CollaborationModeMask;
 use pretty_assertions::assert_eq;
 
 pub(super) async fn test_config() -> Config {
@@ -136,9 +137,20 @@ pub(super) fn test_session_telemetry(config: &Config, model: &str) -> SessionTel
 pub(super) fn test_model_catalog(_config: &Config) -> Arc<ModelCatalog> {
     Arc::new(ModelCatalog::new(
         crate::legacy_core::test_support::all_model_presets().clone(),
+        test_collaboration_mode_presets(),
     ))
 }
 
+pub(super) fn test_collaboration_mode_presets() -> Vec<CollaborationModeMask> {
+    crate::legacy_core::test_support::builtin_collaboration_mode_presets()
+        .into_iter()
+        .map(|mut preset| {
+            preset.developer_instructions = None;
+            preset
+        })
+        .collect()
+}
+
 // --- Helpers for tests that need direct construction and event draining ---
 pub(super) async fn make_chatwidget_manual(
     model_override: Option<&str>,
@@ -303,7 +315,7 @@ pub(crate) fn set_fast_mode_test_catalog(chat: &mut ChatWidget) {
     .map(Into::into)
     .collect();
 
-    chat.model_catalog = Arc::new(ModelCatalog::new(models));
+    chat.model_catalog = Arc::new(ModelCatalog::new(models, test_collaboration_mode_presets()));
 }
 
 pub(crate) async fn make_chatwidget_manual_with_sender() -> (

codex-rs/tui/src/chatwidget/tests/slash_commands.rs

@@ -68,7 +68,10 @@ async fn service_tier_commands_lowercase_catalog_names() {
     let mut preset = get_available_model(&chat, "gpt-5.4");
     let expected_description = preset.service_tiers[0].description.clone();
     preset.service_tiers[0].name = "Fast".to_string();
-    chat.model_catalog = std::sync::Arc::new(ModelCatalog::new(vec![preset]));
+    chat.model_catalog = std::sync::Arc::new(ModelCatalog::new(
+        vec![preset],
+        test_collaboration_mode_presets(),
+    ));
 
     assert_eq!(
         chat.current_model_service_tier_commands(),

codex-rs/tui/src/collaboration_modes.rs

@@ -1,11 +1,11 @@
-use codex_models_manager::collaboration_mode_presets::builtin_collaboration_mode_presets;
 use codex_protocol::config_types::CollaborationModeMask;
 use codex_protocol::config_types::ModeKind;
 
 use crate::model_catalog::ModelCatalog;
 
-fn filtered_presets(_model_catalog: &ModelCatalog) -> Vec<CollaborationModeMask> {
-    builtin_collaboration_mode_presets()
+fn filtered_presets(model_catalog: &ModelCatalog) -> Vec<CollaborationModeMask> {
+    model_catalog
+        .list_collaboration_modes()
         .into_iter()
         .filter(|mask| mask.mode.is_some_and(ModeKind::is_tui_visible))
         .collect()

codex-rs/tui/src/model_catalog.rs

@@ -1,17 +1,29 @@
+use codex_protocol::config_types::CollaborationModeMask;
 use codex_protocol::openai_models::ModelPreset;
 use std::convert::Infallible;
 
 #[derive(Debug, Clone)]
 pub(crate) struct ModelCatalog {
     models: Vec<ModelPreset>,
+    collaboration_modes: Vec<CollaborationModeMask>,
 }
 
 impl ModelCatalog {
-    pub(crate) fn new(models: Vec<ModelPreset>) -> Self {
-        Self { models }
+    pub(crate) fn new(
+        models: Vec<ModelPreset>,
+        collaboration_modes: Vec<CollaborationModeMask>,
+    ) -> Self {
+        Self {
+            models,
+            collaboration_modes,
+        }
     }
 
     pub(crate) fn try_list_models(&self) -> Result<Vec<ModelPreset>, Infallible> {
         Ok(self.models.clone())
     }
+
+    pub(crate) fn list_collaboration_modes(&self) -> Vec<CollaborationModeMask> {
+        self.collaboration_modes.clone()
+    }
 }