do tag stuff at proper time

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/lifecycle/DataPackContentsMixin.java

@@ -0,0 +1,28 @@
+package com.dfsek.terra.fabric.mixin.lifecycle;
+
+import com.dfsek.terra.fabric.util.FabricUtil;
+
+import net.minecraft.server.DataPackContents;
+import net.minecraft.util.registry.DynamicRegistryManager;
+import net.minecraft.util.registry.Registry;
+import org.slf4j.Logger;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+
+@Mixin(DataPackContents.class)
+public class DataPackContentsMixin {
+    @Shadow
+    @Final
+    private static Logger LOGGER;
+    
+    @Inject(method = "refresh(Lnet/minecraft/util/registry/DynamicRegistryManager;)V", at = @At("RETURN"))
+    private void injectReload(DynamicRegistryManager dynamicRegistryManager, CallbackInfo ci) {
+        LOGGER.info("Doing tag garbage....");
+        FabricUtil.registerTags(dynamicRegistryManager.get(Registry.BIOME_KEY));
+    }
+}

platforms/fabric/src/main/resources/terra.mixins.json

@@ -33,6 +33,7 @@
     "implementations.world.ChunkRegionMixin",
     "implementations.world.ServerWorldMixin",
     "lifecycle.ChunkGenerator_ChunkGeneratorRegistrationMixin",
+    "lifecycle.DataPackContentsMixin",
     "lifecycle.MinecraftServerMixin"
   ],
   "client": [