custom events backend, and entity attribute query.

src/main/java/carpet/script/value/ValueConversions.java

@@ -34,6 +34,7 @@ import net.minecraft.util.math.BlockBox;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.ColumnPos;
 import net.minecraft.util.math.Vec3d;
+import net.minecraft.util.math.Vec3i;
 import net.minecraft.util.registry.Registry;
 import net.minecraft.util.registry.RegistryKey;
 import net.minecraft.world.World;
@@ -396,4 +397,26 @@ public class ValueConversions
                 predicateData.getCMDataTag() == null?Value.NULL:new NBTSerializableValue(predicateData.getCMDataTag())
         );
     }
+
+    public static Value guess(ServerWorld serverWorld, Object o) {
+        if (o instanceof List)
+            return ListValue.wrap(((List<?>) o).stream().map(oo -> guess(serverWorld, oo)).collect(Collectors.toList()));
+        if (o instanceof BlockPos)
+            return new BlockValue(null, serverWorld, (BlockPos)o);
+        if (o instanceof Entity)
+            return EntityValue.of((Entity) o);
+        if (o instanceof Vec3d)
+            return of((Vec3d)o);
+        if (o instanceof Vec3i)
+            return of(new BlockPos((Vec3i)o));
+        if (o instanceof ItemStack)
+            return of((ItemStack)o);
+        if (o instanceof Boolean)
+            return BooleanValue.of((Boolean) o);
+        if (o instanceof Number)
+            return NumericValue.of((Number) o);
+        if (o instanceof Identifier)
+            return of((Identifier)o);
+        return StringValue.of(o.toString());
+    }
 }