remove turn event type

codex-rs/core/src/analytics_client.rs

@@ -39,13 +39,6 @@ pub(crate) struct CodexTurnEvent {
     pub(crate) collaboration_mode: ModeKind,
 }
 
-#[derive(Clone, Copy, Debug, Serialize)]
-#[serde(rename_all = "snake_case")]
-pub(crate) enum TurnEventType {
-    Start,
-    Steer,
-}
-
 #[derive(Clone, Copy)]
 pub(crate) struct CodexTurnSteerEvent;
 
@@ -424,7 +417,6 @@ struct CodexTurnEventParams {
     turn_id: Option<String>,
     product_client_id: Option<String>,
     model_slug: Option<String>,
-    turn_event_type: TurnEventType,
     submission_type: Option<SubmissionType>,
     sandbox_policy: Option<&'static str>,
     reasoning_effort: Option<String>,
@@ -806,7 +798,6 @@ fn codex_turn_event_params(
         turn_id: Some(tracking.turn_id.clone()),
         product_client_id: Some(crate::default_client::originator().value),
         model_slug: Some(tracking.model_slug.clone()),
-        turn_event_type: TurnEventType::Start,
         submission_type: turn_event.submission_type,
         sandbox_policy: Some(sandbox_policy_mode(&turn_event.sandbox_policy)),
         reasoning_effort: turn_event.reasoning_effort.map(|value| value.to_string()),
@@ -825,7 +816,6 @@ fn codex_turn_steer_event_params(
         turn_id: Some(tracking.turn_id.clone()),
         product_client_id: Some(crate::default_client::originator().value),
         model_slug: Some(tracking.model_slug.clone()),
-        turn_event_type: TurnEventType::Steer,
         submission_type: None,
         sandbox_policy: None,
         reasoning_effort: None,

codex-rs/core/src/analytics_client_tests.rs

@@ -11,7 +11,6 @@ use super::InvocationType;
 use super::SubmissionType;
 use super::TrackEventRequest;
 use super::TrackEventsContext;
-use super::TurnEventType;
 use super::codex_app_metadata;
 use super::codex_plugin_metadata;
 use super::codex_plugin_used_metadata;
@@ -230,7 +229,6 @@ fn turn_event_serializes_expected_shape() {
                 "turn_id": "turn-2",
                 "product_client_id": crate::default_client::originator().value,
                 "model_slug": "gpt-5",
-                "turn_event_type": "start",
                 "submission_type": "prompt",
                 "sandbox_policy": "read_only",
                 "reasoning_effort": "high",
@@ -265,7 +263,6 @@ fn turn_steer_event_serializes_expected_shape() {
                 "turn_id": "turn-2",
                 "product_client_id": crate::default_client::originator().value,
                 "model_slug": "gpt-5",
-                "turn_event_type": "steer",
                 "submission_type": null,
                 "sandbox_policy": null,
                 "reasoning_effort": null,