diff --git a/.gitignore b/.gitignore
index 0ce9978c..62b6c22a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,7 +18,7 @@
 build
 
 # Leaf
-build-data
+build-data/dev-imports.txt
 patches/todo
 run
 
diff --git a/build-data/leaf.at b/build-data/leaf.at
new file mode 100644
index 00000000..a8a06867
--- /dev/null
+++ b/build-data/leaf.at
@@ -0,0 +1,10 @@
+# This file is auto generated, any changes may be overridden!
+# See CONTRIBUTING.md on how to add access transformers.
+protected net.minecraft.world.entity.Entity dimensions
+public net.minecraft.world.entity.Entity updateInWaterStateAndDoWaterCurrentPushing()V
+public net.minecraft.world.entity.LivingEntity canGlide()Z
+public net.minecraft.world.entity.monster.Shulker MAX_SCALE
+public net.minecraft.world.entity.player.Player canGlide()Z
+public net.minecraft.world.level.block.entity.FuelValues values
+public-f net.minecraft.world.entity.EntityType dimensions
+public-f net.minecraft.world.level.block.state.BlockBehaviour explosionResistance