diff --git a/codex-rs/protocol/src/models.rs b/codex-rs/protocol/src/models.rs
index 1141b46d8b..38da6d541f 100644
--- a/codex-rs/protocol/src/models.rs
+++ b/codex-rs/protocol/src/models.rs
@@ -262,6 +262,13 @@ pub enum UserMessageType {
     PromptQueued,
 }
 
+#[derive(Debug, Clone, Default, Serialize, Deserialize, PartialEq, Eq, JsonSchema, TS)]
+pub struct ResponseItemMetadata {
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    #[ts(optional)]
+    pub user_message_type: Option<UserMessageType>,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize, PartialEq, JsonSchema, TS)]
 #[serde(tag = "type", rename_all = "snake_case")]
 pub enum ContentItem {
@@ -270,13 +277,6 @@ pub enum ContentItem {
     OutputText { text: String },
 }
 
-#[derive(Debug, Clone, Default, Serialize, Deserialize, PartialEq, Eq, JsonSchema, TS)]
-pub struct ResponseItemMetadata {
-    #[serde(default, skip_serializing_if = "Option::is_none")]
-    #[ts(optional)]
-    pub user_message_type: Option<UserMessageType>,
-}
-
 #[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq, JsonSchema, TS)]
 #[serde(rename_all = "lowercase")]
 pub enum ImageDetail {