diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2a924ecd..69dc06c1 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -19,6 +19,13 @@ jobs:
         with:
           distribution: temurin
           java-version: 25
+      - name: Cache generated data
+        uses: actions/cache@v5.0.4
+        with:
+          path: |
+            plugin/build/minecraft/
+            plugin/build/generated/minecraft/mapping/
+          key: minecraft-${{ hashFiles('gradle.properties') }}
       - name: Build LimboAPI
         run: ./gradlew build
       - name: Upload LimboAPI
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index eb8234ec..10a7d6f3 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -15,6 +15,13 @@ jobs:
         with:
           distribution: temurin
           java-version: 25
+      - name: Cache generated data
+        uses: actions/cache@v5.0.4
+        with:
+          path: |
+            plugin/build/minecraft/
+            plugin/build/generated/minecraft/mapping/
+          key: minecraft-${{ hashFiles('gradle.properties') }}
       - name: Build LimboAPI
         run: ./gradlew build
       - name: Upload LimboAPI
diff --git a/gradle.properties b/gradle.properties
index bbab74cb..5937da46 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,3 +1,8 @@
 org.gradle.jvmargs=-Xmx4096m
 manifestUrl=https://launchermeta.mojang.com/mc/game/version_manifest.json
-cacheValidMillis=6000000
\ No newline at end of file
+
+# 1 week
+cacheValidMillis=604800000
+
+# Change to invalidate mappings cache on CI
+gameVersion=26.1
\ No newline at end of file
diff --git a/plugin/build.gradle b/plugin/build.gradle
index 9bdf5432..e6801031 100644
--- a/plugin/build.gradle
+++ b/plugin/build.gradle
@@ -283,7 +283,8 @@ File generateData(MinecraftVersion version) {
   }
 
   File jarFile = this.getServerJar(version.getVersionName())
-  File targetDir = new File(jarFile.getParentFile(), "generated")
+  File parent = jarFile.getParentFile()
+  File targetDir = new File(parent, "generated")
 
   try {
     FileUtils.deleteDirectory(targetDir)
@@ -306,7 +307,36 @@ File generateData(MinecraftVersion version) {
     File java = new File(System.getProperty("java.home"), "bin/java")
     commandLine = ["bash", "-c", String.format(command, java)]
   }
-  commandLine.execute([], jarFile.getParentFile()).waitFor()
+  commandLine.execute([], parent).waitFor()
+
+  // Remove/compact files, reduces disk usage from ~2.9gb to ~92mb (or ~9.5mb on a compressed filesystem)
+  jarFile.delete()
+  FileUtils.deleteDirectory(new File(parent, "logs"))
+  FileUtils.deleteDirectory(new File(parent, "libraries"))
+  FileUtils.deleteDirectory(new File(parent, "versions"))
+
+  new File(targetDir, "reports/commands.json").delete()
+
+  FileUtils.deleteDirectory(new File(targetDir, ".cache"))
+  FileUtils.deleteDirectory(new File(targetDir, "reports/biome_parameters"))
+  FileUtils.deleteDirectory(new File(targetDir, "reports/biomes"))
+  FileUtils.deleteDirectory(new File(targetDir, "reports/worldgen"))
+  FileUtils.deleteDirectory(new File(targetDir, "reports/minecraft/components/item"))
+  FileUtils.deleteDirectory(new File(targetDir, "data/minecraft/datapacks"))
+  FileUtils.deleteDirectory(new File(targetDir, "data/minecraft/advancements"))
+  FileUtils.deleteDirectory(new File(targetDir, "data/minecraft/advancement"))
+  FileUtils.deleteDirectory(new File(targetDir, "data/minecraft/recipes"))
+  FileUtils.deleteDirectory(new File(targetDir, "data/minecraft/recipe"))
+  FileUtils.deleteDirectory(new File(targetDir, "data/minecraft/loot_tables"))
+  FileUtils.deleteDirectory(new File(targetDir, "data/minecraft/loot_table"))
+  FileUtils.deleteDirectory(new File(targetDir, "data/minecraft/worldgen"))
+
+  java.nio.file.Files.walk(parent.toPath(), 32).forEach { it ->
+    if (it.fileName.toString().endsWith(".json")) {
+      java.nio.file.Files.writeString(it, JsonOutput.toJson(new JsonSlurper().parse(it)))
+    }
+  }
+
   return targetDir
 }