object tags

kiln-core/src/map_file.rs

@@ -191,6 +191,9 @@ pub(crate) struct MapFileObjectEntry {
     /// Name of the Rhai script in the `[scripts]` table, if any.
     #[serde(default, skip_serializing_if = "Option::is_none")]
     script_name: Option<String>,
+    /// Open-ended string labels. Serialized as a TOML array; omitted when empty.
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    tags: Vec<String>,
 }
 
 fn default_true() -> bool {
@@ -497,6 +500,7 @@ impl TryFrom<MapFile> for Board {
                 }
             };
             let obj = ObjectDef {
+                id: 0, // stamped by Board::add_object
                 x,
                 y,
                 glyph: Glyph {
@@ -508,6 +512,7 @@ impl TryFrom<MapFile> for Board {
                 opaque: e.opaque,
                 pushable: e.pushable,
                 script_name: e.script_name,
+                tags: e.tags.into_iter().collect(),
             };
             // A solid object may not share a cell with another solid.
             if obj.solid {
@@ -645,6 +650,8 @@ impl From<&Board> for MapFile {
                 opaque: o.opaque,
                 pushable: o.pushable,
                 script_name: o.script_name.clone(),
+                // Sort for stable TOML output; HashSet iteration order is non-deterministic.
+                tags: { let mut v: Vec<String> = o.tags.iter().cloned().collect(); v.sort(); v },
             })
             .collect();