drop all items equipped and armor stand item when stand-in mannequin is killed

src/main/java/me/youhavetrouble/standin/StandIn.java

@@ -3,6 +3,7 @@ package me.youhavetrouble.standin;
 import me.youhavetrouble.standin.entity.ArmorStandHandler;
 import me.youhavetrouble.standin.entity.EntityHandler;
 import me.youhavetrouble.standin.entity.MannequinHandler;
+import me.youhavetrouble.standin.stand.MiscHandlerListener;
 import me.youhavetrouble.standin.stand.StandinInteractionListener;
 import org.bukkit.NamespacedKey;
 import org.bukkit.entity.Entity;
@@ -46,6 +47,7 @@ public final class StandIn extends JavaPlugin {
         });
 
         getServer().getPluginManager().registerEvents(new StandinInteractionListener(this), this);
+        getServer().getPluginManager().registerEvents(new MiscHandlerListener(), this);
     }
 
     /**

src/main/java/me/youhavetrouble/standin/stand/MiscHandlerListener.java

@@ -0,0 +1,28 @@
+package me.youhavetrouble.standin.stand;
+
+import me.youhavetrouble.standin.entity.EntityHandler;
+import org.bukkit.Material;
+import org.bukkit.entity.Mannequin;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDeathEvent;
+import org.bukkit.inventory.ItemStack;
+
+import java.util.List;
+
+public class MiscHandlerListener implements Listener {
+
+    @EventHandler(priority = EventPriority.LOWEST, ignoreCancelled = true)
+    public void onMannequinDeath(EntityDeathEvent event) {
+        if (!(event.getEntity() instanceof Mannequin mannequin)) return;
+        if (!EntityHandler.isStandinEntity(mannequin)) return;
+        // Clear any default drops and drop all items equipped on the mannequin
+        event.getDrops().clear();
+        event.getDrops().addAll(List.of(mannequin.getEquipment().getArmorContents()));
+        event.getDrops().add(mannequin.getEquipment().getItemInMainHand());
+        event.getDrops().add(mannequin.getEquipment().getItemInOffHand());
+        event.getDrops().add(new ItemStack(Material.ARMOR_STAND));
+    }
+
+}