diff --git a/server-rs/crates/shared-contracts/src/editor_agent.rs b/server-rs/crates/shared-contracts/src/editor_agent.rs
index c34e185a0..12e2eb461 100644
--- a/server-rs/crates/shared-contracts/src/editor_agent.rs
+++ b/server-rs/crates/shared-contracts/src/editor_agent.rs
@@ -124,7 +124,7 @@ pub struct EditorAgentToolCall {
 #[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
 #[serde(rename_all = "camelCase")]
 pub struct EditorAgentMessage {
-    pub id: String,
+    pub id: usize,
     pub role: EditorAgentMessageRole,
     pub text: String,
     #[serde(default)]