diff --git a/dont_clone_monorepo.py b/dont_clone_monorepo.py
new file mode 100644
index 0000000000..b3e120ced1
--- /dev/null
+++ b/dont_clone_monorepo.py
@@ -0,0 +1,17 @@
+"""
+This file exists in our monorepo so that if someone accidentally clones this monorepo
+into their talon folder instead of cursorless-talon, they'll get a helpful error popup
+"""
+
+from talon import app
+
+
+def on_ready():
+    app.notify(
+        "Whoops! You cloned our monorepo instead of cursorless-talon",
+        "Please remove cursorless and clone cursorless-talon instead:",
+        "https://github.com/cursorless-dev/cursorless-talon",
+    )
+
+
+app.register("ready", on_ready)