diff -r f70f61a8c5bc -r e8f58714bcf0 mercurial/hg.py
--- a/mercurial/hg.py	Wed Jul 10 17:37:35 2024 -0400
+++ b/mercurial/hg.py	Wed Jul 10 17:44:49 2024 -0400
@@ -11,6 +11,7 @@
 import posixpath
 import shutil
 import stat
+import typing
 import weakref
 
 from .i18n import _
@@ -57,6 +58,11 @@
     urlutil,
 )
 
+if typing.TYPE_CHECKING:
+    from typing import (
+        List,
+        Tuple,
+    )
 
 release = lock.release
 
@@ -1597,7 +1603,7 @@
 # Files of interest
 # Used to check if the repository has changed looking at mtime and size of
 # these files.
-foi = [
+foi: "List[Tuple[str, bytes]]" = [
     ('spath', b'00changelog.i'),
     ('spath', b'phaseroots'),  # ! phase can change content at the same size
     ('spath', b'obsstore'),