From 8fa523e7e0dbc3300366a2c6dc8782e70dfc656e Mon Sep 17 00:00:00 2001
From: DetachHead <57028336+DetachHead@users.noreply.github.com>
Date: Mon, 27 Jul 2026 15:16:57 +1000
Subject: [PATCH 1/2] use `LiteralString` for `sentinel` name

type checkers enforce that the first argument to a sentinel is a string literal matching its name, which is enforced by the PEP: see https://peps.python.org/pep-0661/#typing

currently the type checkers contain logic to enforce that the argument is a string literal, but some of this special-casing can be removed if we use `LiteralString` in the stubs
---
 stdlib/builtins.pyi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stdlib/builtins.pyi b/stdlib/builtins.pyi
index 3c549d97316c..a11f4fed3b3a 100644
--- a/stdlib/builtins.pyi
+++ b/stdlib/builtins.pyi
@@ -2196,7 +2196,7 @@ if sys.version_info >= (3, 15):
     class sentinel:
         __name__: str
         __module__: str
-        def __new__(cls, name: str, /, *, repr: str | None = None) -> sentinel: ...
+        def __new__(cls, name: LiteralString, /, *, repr: str | None = None) -> sentinel: ...
         def __copy__(self, /) -> sentinel: ...
         def __deepcopy__(self, memo: Any, /) -> sentinel: ...
         # `other` can be any legal form for unions.

From 1f5eab58de3bcee9ace6ecb63e0d96f0811d121e Mon Sep 17 00:00:00 2001
From: DetachHead <57028336+DetachHead@users.noreply.github.com>
Date: Mon, 27 Jul 2026 16:46:22 +1000
Subject: [PATCH 2/2] update `typing_extensions.sentinel` with the same change

---
 stdlib/typing_extensions.pyi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stdlib/typing_extensions.pyi b/stdlib/typing_extensions.pyi
index b89d96b2be9c..2850cadfee4a 100644
--- a/stdlib/typing_extensions.pyi
+++ b/stdlib/typing_extensions.pyi
@@ -730,7 +730,7 @@ if sys.version_info >= (3, 15):
     from builtins import sentinel as sentinel
 else:
     class sentinel:
-        def __init__(self, name: str, /, *, repr: str | None = None) -> None: ...
+        def __init__(self, name: LiteralString, /, *, repr: str | None = None) -> None: ...
         __name__: str
         __module__: str
         if sys.version_info >= (3, 14):