diff --git a/.gitmodules b/.gitmodules
index 1beb71e67..b573ee43c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,3 +10,6 @@
 [submodule "prototype/External/SwiftCheck"]
 	path = prototype/External/SwiftCheck
 	url = https://github.com/typelift/SwiftCheck.git
+[submodule "prototype/External/tree-sitter"]
+	path = prototype/External/tree-sitter
+	url = https://github.com/maxbrunsfeld/tree-sitter.git
diff --git a/prototype/External/tree-sitter b/prototype/External/tree-sitter
new file mode 160000
index 000000000..1829b34c6
--- /dev/null
+++ b/prototype/External/tree-sitter
@@ -0,0 +1 @@
+Subproject commit 1829b34c6f72ed890310b8d523e861f950fb0687