diff --git a/crates/project/src/agent_registry_store.rs b/crates/project/src/agent_registry_store.rs
index 0d49e2683e8f30240fde366b985b5d76ae26b51a..e1f97220bffb422aebbbb2d01e65cb63662187b5 100644
--- a/crates/project/src/agent_registry_store.rs
+++ b/crates/project/src/agent_registry_store.rs
@@ -536,8 +536,6 @@ struct RegistryIndex {
     #[serde(rename = "version")]
     _version: String,
     agents: Vec<RegistryEntry>,
-    #[serde(rename = "extensions")]
-    _extensions: Vec<RegistryEntry>,
 }
 
 #[derive(Deserialize)]