diff --git a/cli/.config/helix/languages.toml b/cli/.config/helix/languages.toml
new file mode 100644
index 0000000..6f051dd
--- /dev/null
+++ b/cli/.config/helix/languages.toml
@@ -0,0 +1,4 @@
+[[language]]
+name = "common-lisp"
+scope = "source.lisp"
+file-types = ["kbd", "lisp", "asd", "cl", "l", "lsp", "ny", "podsl", "sexp"]