builtin scripts

kiln-core/src/object_def.rs

@@ -51,6 +51,11 @@ pub struct ObjectDef {
     /// Name of the Rhai script in [`Board::scripts`] that drives this object.
     /// `None` means this object has no script yet.
     pub script_name: Option<String>,
+    /// Embedded built-in script source, set when a script-backed archetype (e.g. a
+    /// `pusher_*`) is expanded into an object at load time (see
+    /// [`crate::builtin_scripts`]). Takes precedence over [`script_name`](ObjectDef::script_name)
+    /// and is not part of the map file (it is regenerated from the archetype on load).
+    pub builtin_script: Option<&'static str>,
     /// Open-ended string labels for this object. Serialized as a TOML array;
     /// not subject to any rate limit — mutations take effect immediately after
     /// the frame's action queue is drained.
@@ -88,6 +93,7 @@ impl ObjectDef {
             opaque: true,
             pushable: false,
             script_name: None,
+            builtin_script: None,
             tags: HashSet::new(),
             name: None,
         }