diff --git a/stdlib/cmd.pyi b/stdlib/cmd.pyi
index f6d818591..82b2a7bc8 100644
--- a/stdlib/cmd.pyi
+++ b/stdlib/cmd.pyi
@@ -1,4 +1,10 @@
 from typing import IO, Any, Callable
+from typing_extensions import Literal
+
+__all__ = ["Cmd"]
+
+PROMPT: Literal["(Cmd) "]
+IDENTCHARS: str  # Too big to be `Literal`
 
 class Cmd:
     prompt: str