prototype vibe

systems/xp_system.gd

@@ -0,0 +1,19 @@
+extends Node
+
+const XP_PER_ENEMY: int = 3
+const XP_PER_BOSS: int = 30
+
+func _ready() -> void:
+  EventBus.entity_died.connect(_on_entity_died)
+
+func _on_entity_died(entity: Node) -> void:
+  if not entity or not is_instance_valid(entity):
+    return
+  if not entity.is_in_group("enemies"):
+    return
+  var is_boss: bool = entity.is_in_group("boss")
+  var data_source: Node = BossData if is_boss else EnemyData
+  var scale_val: Variant = data_source.get_stat(entity, "scale")
+  var scale: float = scale_val if scale_val != null else 1.0
+  var base_xp: int = XP_PER_BOSS if is_boss else XP_PER_ENEMY
+  PlayerData.add_xp(int(base_xp * scale))