diff --git a/src/minecraft/kotlin/xyz/wagyourtail/unimined/internal/minecraft/patch/forge/fg3/FG3MinecraftTransformer.kt b/src/minecraft/kotlin/xyz/wagyourtail/unimined/internal/minecraft/patch/forge/fg3/FG3MinecraftTransformer.kt
index 0d43a4f5..3d8d695a 100644
--- a/src/minecraft/kotlin/xyz/wagyourtail/unimined/internal/minecraft/patch/forge/fg3/FG3MinecraftTransformer.kt
+++ b/src/minecraft/kotlin/xyz/wagyourtail/unimined/internal/minecraft/patch/forge/fg3/FG3MinecraftTransformer.kt
@@ -1,9 +1,12 @@
 package xyz.wagyourtail.unimined.internal.minecraft.patch.forge.fg3
 
+import com.google.gson.JsonArray
+import com.google.gson.JsonObject
 import com.google.gson.JsonParser
 import net.minecraftforge.binarypatcher.ConsoleTool
 import org.apache.commons.io.output.NullOutputStream
 import org.gradle.api.Project
+import org.gradle.api.artifacts.Configuration
 import org.gradle.api.artifacts.Dependency
 import org.gradle.api.logging.LogLevel
 import org.jetbrains.annotations.ApiStatus
@@ -13,6 +16,7 @@ import xyz.wagyourtail.unimined.api.minecraft.MinecraftJar
 import xyz.wagyourtail.unimined.api.minecraft.task.RemapJarTask
 import xyz.wagyourtail.unimined.api.runs.RunConfig
 import xyz.wagyourtail.unimined.api.unimined
+import xyz.wagyourtail.unimined.internal.minecraft.patch.fabric.FabricLikeMinecraftTransformer
 import xyz.wagyourtail.unimined.internal.minecraft.patch.forge.ForgeLikeMinecraftTransformer
 import xyz.wagyourtail.unimined.internal.minecraft.patch.forge.MinecraftForgeMinecraftTransformer
 import xyz.wagyourtail.unimined.internal.minecraft.patch.forge.NeoForgedMinecraftTransformer
@@ -21,7 +25,6 @@ import xyz.wagyourtail.unimined.internal.minecraft.patch.forge.fg3.mcpconfig.Mcp
 import xyz.wagyourtail.unimined.internal.minecraft.patch.forge.fg3.mcpconfig.McpExecutor
 import xyz.wagyourtail.unimined.internal.minecraft.patch.jarmod.JarModMinecraftTransformer
 import xyz.wagyourtail.unimined.internal.minecraft.resolver.AssetsDownloader
-import xyz.wagyourtail.unimined.internal.minecraft.transform.fixes.FixFG2Coremods
 import xyz.wagyourtail.unimined.internal.minecraft.transform.fixes.FixFG2ResourceLoading
 import xyz.wagyourtail.unimined.internal.minecraft.transform.merge.ClassMerger
 import xyz.wagyourtail.unimined.util.*
@@ -59,6 +62,13 @@ class FG3MinecraftTransformer(project: Project, val parent: ForgeLikeMinecraftTr
         parent.accessTransformerTransformer.accessTransformerPaths = listOf("fml_at.cfg", "forge_at.cfg", "META-INF/accesstransformer.cfg")
     }
 
+    private val include: Configuration? =
+        if (provider.minecraftData.mcVersionCompare(provider.version, "1.18") >= 0) {
+            project.configurations.maybeCreate("include".withSourceSet(provider.sourceSet))
+        } else {
+            null
+        }
+
     override val prodNamespace by lazy {
         if (userdevCfg["mcp"].asString.contains("neoform")) {
             provider.mappings.getNamespace("mojmap")
@@ -524,8 +534,53 @@ class FG3MinecraftTransformer(project: Project, val parent: ForgeLikeMinecraftTr
         return parent.accessTransformerTransformer.afterRemap(fixForge(baseMinecraft))
     }
 
+    private fun addIncludeToMetadata(json: JsonObject, dep: Dependency, path: String) {
+        var jars = json.get("jars")?.asJsonArray
+        if (jars == null) {
+            jars = JsonArray()
+            json.add("jars", jars)
+        }
+        jars.add(JsonObject().apply {
+            add("identifier", JsonObject().apply {
+                addProperty("group", dep.group)
+                addProperty("artifact", dep.name)
+            })
+            add("version", JsonObject().apply {
+                addProperty("range", "[${dep.version},)")
+                addProperty("artifactVersion", dep.version)
+            })
+            addProperty("path", path)
+        })
+    }
+
+    private fun doJarJar(remapJarTask: RemapJarTask, output: Path) {
+        output.openZipFileSystem(mapOf("mutable" to true)).use { fs ->
+            val mod = fs.getPath("META-INF/jarjar/metadata.json")
+            val json = JsonObject()
+
+            Files.createDirectories(fs.getPath("META-INF/jarjar/"))
+            val includeCache = provider.localCache.resolve("includeCache")
+            Files.createDirectories(includeCache)
+            for (dep in include!!.dependencies) {
+                val path = fs.getPath("META-INF/jarjar/${dep.name}-${dep.version}.jar")
+                if (!Files.exists(path)) {
+                    Files.copy(
+                        include.files(dep).first { it.extension == "jar" }.toPath(),
+                        includeCache.resolve("${dep.name}-${dep.version}.jar"),
+                        StandardCopyOption.REPLACE_EXISTING
+                    )
+                }
+
+                addIncludeToMetadata(json, dep, "META-INF/jarjar/${dep.name}-${dep.version}.jar")
+            }
+            Files.write(mod, FabricLikeMinecraftTransformer.GSON.toJson(json).toByteArray(), StandardOpenOption.TRUNCATE_EXISTING)
+        }
+    }
+
     override fun afterRemapJarTask(remapJarTask: RemapJarTask, output: Path) {
-        //TODO: JarJar
+        if (provider.minecraftData.mcVersionCompare(provider.version, "1.18") >= 0) {
+            doJarJar(remapJarTask, output)
+        }
     }
 
     private fun fixForge(baseMinecraft: MinecraftJar): MinecraftJar {