Expose collaboration presets (#9421)

Expose collaboration presets for clients

---------

Co-authored-by: Josh McKinney <joshka@openai.com>

codex-rs/core/src/models_manager/collaboration_mode_presets.rs

@@ -0,0 +1,31 @@
+use codex_protocol::config_types::CollaborationMode;
+use codex_protocol::config_types::Settings;
+use codex_protocol::openai_models::ReasoningEffort;
+
+pub(super) fn builtin_collaboration_mode_presets() -> Vec<CollaborationMode> {
+    vec![plan_preset(), collaborate_preset(), execute_preset()]
+}
+
+fn plan_preset() -> CollaborationMode {
+    CollaborationMode::Plan(Settings {
+        model: "gpt-5.2-codex".to_string(),
+        reasoning_effort: Some(ReasoningEffort::Medium),
+        developer_instructions: None,
+    })
+}
+
+fn collaborate_preset() -> CollaborationMode {
+    CollaborationMode::Collaborate(Settings {
+        model: "gpt-5.2-codex".to_string(),
+        reasoning_effort: Some(ReasoningEffort::Medium),
+        developer_instructions: None,
+    })
+}
+
+fn execute_preset() -> CollaborationMode {
+    CollaborationMode::Execute(Settings {
+        model: "gpt-5.2-codex".to_string(),
+        reasoning_effort: Some(ReasoningEffort::XHigh),
+        developer_instructions: None,
+    })
+}

codex-rs/core/src/models_manager/manager.rs

@@ -1,6 +1,7 @@
 use codex_api::ModelsClient;
 use codex_api::ReqwestTransport;
 use codex_app_server_protocol::AuthMode;
+use codex_protocol::config_types::CollaborationMode;
 use codex_protocol::openai_models::ModelInfo;
 use codex_protocol::openai_models::ModelPreset;
 use codex_protocol::openai_models::ModelsResponse;
@@ -23,6 +24,7 @@ use crate::error::CodexErr;
 use crate::error::Result as CoreResult;
 use crate::features::Feature;
 use crate::model_provider_info::ModelProviderInfo;
+use crate::models_manager::collaboration_mode_presets::builtin_collaboration_mode_presets;
 use crate::models_manager::model_info;
 use crate::models_manager::model_presets::builtin_model_presets;
 
@@ -90,6 +92,13 @@ impl ModelsManager {
         self.build_available_models(remote_models)
     }
 
+    /// List collaboration mode presets.
+    ///
+    /// Returns a static set of presets seeded with the configured model.
+    pub fn list_collaboration_modes(&self) -> Vec<CollaborationMode> {
+        builtin_collaboration_mode_presets()
+    }
+
     /// Attempt to list models without blocking, using the current cached state.
     ///
     /// Returns an error if the internal lock cannot be acquired.

codex-rs/core/src/models_manager/mod.rs

@@ -1,4 +1,5 @@
 pub mod cache;
+pub mod collaboration_mode_presets;
 pub mod manager;
 pub mod model_info;
 pub mod model_presets;