fixed left handed arm sway direction

src/main/java/club/sk1er/patcher/mixins/features/lefthand/ItemRendererMixin_LeftHandedness.java

@@ -0,0 +1,15 @@
+package club.sk1er.patcher.mixins.features.lefthand;
+
+import club.sk1er.patcher.config.PatcherConfig;
+import net.minecraft.client.renderer.ItemRenderer;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.Constant;
+import org.spongepowered.asm.mixin.injection.ModifyConstant;
+
+@Mixin(ItemRenderer.class)
+public class ItemRendererMixin_LeftHandedness {
+    @ModifyConstant(method = "rotateWithPlayerRotations", constant = @Constant(floatValue = 1f, ordinal = 0))
+    private float leftHandRotate(float constant) {
+        return PatcherConfig.leftHandInFirstPerson ? -constant : constant;
+    }
+}

src/main/resources/mixins.patcher.json

@@ -204,6 +204,7 @@
     "features.invscale.GuiScreenMixin_InventoryScale",
     "features.invscale.ScaledResolutionMixin_InventoryScale",
     "features.lefthand.EntityRendererMixin_LeftHandedness",
+    "features.lefthand.ItemRendererMixin_LeftHandedness",
     "features.lefthand.RenderFishMixin_LeftHandedness",
     "features.lefthand.RenderItemMixin_LeftHandedness",
     "features.network.NetHandlerPlayClientMixin_ChatDelay",