fix(host): align descriptor and publication identity

crates/wip-host/src/lib.rs

@@ -160,7 +160,9 @@ impl InterfaceRegistry {
     ///
     /// `validator` should be present when the host intends the reference to
     /// represent a versioned descriptor. Its presence makes the same value a
-    /// mandatory precondition for dispatch.
+    /// mandatory precondition for dispatch. Registration finalizes the
+    /// descriptor's protocol `name` to the assigned opaque reference so it
+    /// corresponds directly to [`Object::interfaces`].
     pub fn register<D>(
         &mut self,
         _definition: D,
@@ -174,7 +176,7 @@ impl InterfaceRegistry {
             return Err(RegistrationError::AlreadyRegistered);
         }
 
-        let descriptor = D::descriptor();
+        let mut descriptor = D::descriptor();
         descriptor
             .validate()
             .map_err(RegistrationError::InvalidDescriptor)?;
@@ -183,6 +185,11 @@ impl InterfaceRegistry {
             "wip-interface:{}:{}",
             self.namespace, self.next_reference
         ));
+        // The protocol model currently carries the interface identifier in the
+        // descriptor's `name` field. Finalize that identity to the same opaque
+        // reference placed on published objects; the generated Rust trait name
+        // is registration-local metadata, not wire identity.
+        descriptor.name = reference.0.clone();
         self.next_reference = self
             .next_reference
             .checked_add(1)