diff --git a/.gitmodules b/.gitmodules
index edd4721..6077e84 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -241,3 +241,6 @@
 [submodule "addons/LuaPlayerYT/module"]
 	path = addons/LuaPlayerYT/module
 	url = https://github.com/antim0118/lpyt-lls-addon
+[submodule "addons/castlexyz/module"]
+	path = addons/castlexyz/module
+	url = https://github.com/trobukan/castlexyz.git
diff --git a/addons/castlexyz/info.json b/addons/castlexyz/info.json
new file mode 100644
index 0000000..cffa623
--- /dev/null
+++ b/addons/castlexyz/info.json
@@ -0,0 +1,7 @@
+{
+  "$schema": "https://raw.githubusercontent.com/LuaLS/LLS-Addons/main/schemas/addon_info.schema.json",
+  "name": "Castlexyz",
+  "description": "Definitions for the Castlexyz Lua API",
+  "size": 17761,
+  "hasPlugin": false
+}
diff --git a/addons/castlexyz/module b/addons/castlexyz/module
new file mode 160000
index 0000000..777c10d
--- /dev/null
+++ b/addons/castlexyz/module
@@ -0,0 +1 @@
+Subproject commit 777c10db03582e4083a96912d6d8efefdbc46bae