From 295d2e0f9c528a88dfddd03c671432c96ff12f47 Mon Sep 17 00:00:00 2001
From: Sebastian Rittau <sebastian.rittau@zfutura.de>
Date: Thu, 4 Dec 2025 12:30:02 +0100
Subject: [PATCH 01/13] Add expat XMLParser methods

These were added in point releases

Closes: #15104
---
 stdlib/@tests/stubtest_allowlists/py310.txt | 12 ++++++++++++
 stdlib/@tests/stubtest_allowlists/py311.txt | 12 ++++++++++++
 stdlib/@tests/stubtest_allowlists/py312.txt | 11 +++++++++++
 stdlib/pyexpat/__init__.pyi                 |  5 +++++
 4 files changed, 40 insertions(+)

diff --git a/stdlib/@tests/stubtest_allowlists/py310.txt b/stdlib/@tests/stubtest_allowlists/py310.txt
index b7dc763c7248..37eb5d038cad 100644
--- a/stdlib/@tests/stubtest_allowlists/py310.txt
+++ b/stdlib/@tests/stubtest_allowlists/py310.txt
@@ -1,3 +1,15 @@
+# =========
+# Temporary
+# =========
+
+
+# Will be added in 3.10.20
+pyexpat.XMLParserType.SetAllocTrackerActivationThreshold
+pyexpat.XMLParserType.SetAllocTrackerMaximumAmplification
+xml.parsers.expat.XMLParserType.SetAllocTrackerActivationThreshold
+xml.parsers.expat.XMLParserType.SetAllocTrackerMaximumAmplification
+
+
 # =========================
 # New errors in Python 3.10
 # =========================
diff --git a/stdlib/@tests/stubtest_allowlists/py311.txt b/stdlib/@tests/stubtest_allowlists/py311.txt
index fe0b34206cf9..1f36410deb4e 100644
--- a/stdlib/@tests/stubtest_allowlists/py311.txt
+++ b/stdlib/@tests/stubtest_allowlists/py311.txt
@@ -1,3 +1,15 @@
+# =========
+# Temporary
+# =========
+
+
+# Will be added in 3.11.15
+pyexpat.XMLParserType.SetAllocTrackerActivationThreshold
+pyexpat.XMLParserType.SetAllocTrackerMaximumAmplification
+xml.parsers.expat.XMLParserType.SetAllocTrackerActivationThreshold
+xml.parsers.expat.XMLParserType.SetAllocTrackerMaximumAmplification
+
+
 # =========================
 # New errors in Python 3.11
 # =========================
diff --git a/stdlib/@tests/stubtest_allowlists/py312.txt b/stdlib/@tests/stubtest_allowlists/py312.txt
index ef1c5d12bf4a..d21fdfff468d 100644
--- a/stdlib/@tests/stubtest_allowlists/py312.txt
+++ b/stdlib/@tests/stubtest_allowlists/py312.txt
@@ -1,3 +1,14 @@
+# =========
+# Temporary
+# =========
+
+# Will be added in 3.12.13
+pyexpat.XMLParserType.SetAllocTrackerActivationThreshold
+pyexpat.XMLParserType.SetAllocTrackerMaximumAmplification
+xml.parsers.expat.XMLParserType.SetAllocTrackerActivationThreshold
+xml.parsers.expat.XMLParserType.SetAllocTrackerMaximumAmplification
+
+
 # =========================
 # New errors in Python 3.12
 # =========================
diff --git a/stdlib/pyexpat/__init__.pyi b/stdlib/pyexpat/__init__.pyi
index 21e676052098..17cab7498b6f 100644
--- a/stdlib/pyexpat/__init__.pyi
+++ b/stdlib/pyexpat/__init__.pyi
@@ -2,6 +2,7 @@ from _typeshed import ReadableBuffer, SupportsRead
 from collections.abc import Callable
 from pyexpat import errors as errors, model as model
 from typing import Any, Final, final
+from psycopg2.extensions import Int
 from typing_extensions import CapsuleType, TypeAlias
 from xml.parsers.expat import ExpatError as ExpatError
 
@@ -29,6 +30,10 @@ class XMLParserType:
     def UseForeignDTD(self, flag: bool = True, /) -> None: ...
     def GetReparseDeferralEnabled(self) -> bool: ...
     def SetReparseDeferralEnabled(self, enabled: bool, /) -> None: ...
+    # Added in Python 3.10.20, 3.11.15, 3.12.3, 3.13.10, 3.14.1
+    def SetAllocTrackerActivationThreshold(self, threshold: int, /) -> None: ...
+    def SetAllocTrackerMaximumAmplification(self, max_factor: float, /) -> None: ...
+
     @property
     def intern(self) -> dict[str, str]: ...
     buffer_size: int

From 6c4a1a3ed0cadde64335aae2f675cf4860809ac0 Mon Sep 17 00:00:00 2001
From: Sebastian Rittau <sebastian.rittau@zfutura.de>
Date: Thu, 4 Dec 2025 12:32:43 +0100
Subject: [PATCH 02/13] Add version_info branch

---
 stdlib/pyexpat/__init__.pyi | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/stdlib/pyexpat/__init__.pyi b/stdlib/pyexpat/__init__.pyi
index 17cab7498b6f..bc522d5f3c92 100644
--- a/stdlib/pyexpat/__init__.pyi
+++ b/stdlib/pyexpat/__init__.pyi
@@ -1,8 +1,8 @@
+import sys
 from _typeshed import ReadableBuffer, SupportsRead
 from collections.abc import Callable
 from pyexpat import errors as errors, model as model
 from typing import Any, Final, final
-from psycopg2.extensions import Int
 from typing_extensions import CapsuleType, TypeAlias
 from xml.parsers.expat import ExpatError as ExpatError
 
@@ -30,9 +30,10 @@ class XMLParserType:
     def UseForeignDTD(self, flag: bool = True, /) -> None: ...
     def GetReparseDeferralEnabled(self) -> bool: ...
     def SetReparseDeferralEnabled(self, enabled: bool, /) -> None: ...
-    # Added in Python 3.10.20, 3.11.15, 3.12.3, 3.13.10, 3.14.1
-    def SetAllocTrackerActivationThreshold(self, threshold: int, /) -> None: ...
-    def SetAllocTrackerMaximumAmplification(self, max_factor: float, /) -> None: ...
+    if sys.version_info >= (3, 10):
+        # Added in Python 3.10.20, 3.11.15, 3.12.3, 3.13.10, 3.14.1
+        def SetAllocTrackerActivationThreshold(self, threshold: int, /) -> None: ...
+        def SetAllocTrackerMaximumAmplification(self, max_factor: float, /) -> None: ...
 
     @property
     def intern(self) -> dict[str, str]: ...

From 80a207d042e0516632db5fee984c4e23a6b75440 Mon Sep 17 00:00:00 2001
From: Sebastian Rittau <sebastian.rittau@zfutura.de>
Date: Thu, 4 Dec 2025 12:41:17 +0100
Subject: [PATCH 03/13] HTMLParser.__init__ allowlist updates

---
 stdlib/@tests/stubtest_allowlists/darwin-py310.txt | 8 ++++++++
 stdlib/@tests/stubtest_allowlists/darwin-py311.txt | 8 ++++++++
 stdlib/@tests/stubtest_allowlists/darwin-py312.txt | 8 ++++++++
 stdlib/@tests/stubtest_allowlists/darwin-py39.txt  | 8 ++++++++
 stdlib/@tests/stubtest_allowlists/darwin.txt       | 8 --------
 stdlib/@tests/stubtest_allowlists/linux-py310.txt  | 6 +++---
 stdlib/@tests/stubtest_allowlists/linux-py311.txt  | 6 +++---
 stdlib/@tests/stubtest_allowlists/linux-py312.txt  | 6 +++---
 stdlib/@tests/stubtest_allowlists/linux-py313.txt  | 6 ------
 stdlib/@tests/stubtest_allowlists/linux-py314.txt  | 6 ------
 stdlib/@tests/stubtest_allowlists/win32-py310.txt  | 9 ++++++---
 stdlib/@tests/stubtest_allowlists/win32-py311.txt  | 9 ++++++---
 stdlib/@tests/stubtest_allowlists/win32-py312.txt  | 8 ++++++++
 stdlib/@tests/stubtest_allowlists/win32-py39.txt   | 9 ++++++---
 stdlib/@tests/stubtest_allowlists/win32.txt        | 8 --------
 15 files changed, 67 insertions(+), 46 deletions(-)
 delete mode 100644 stdlib/@tests/stubtest_allowlists/linux-py313.txt
 delete mode 100644 stdlib/@tests/stubtest_allowlists/linux-py314.txt

diff --git a/stdlib/@tests/stubtest_allowlists/darwin-py310.txt b/stdlib/@tests/stubtest_allowlists/darwin-py310.txt
index 331f922dab66..df6bf0af1b91 100644
--- a/stdlib/@tests/stubtest_allowlists/darwin-py310.txt
+++ b/stdlib/@tests/stubtest_allowlists/darwin-py310.txt
@@ -1,3 +1,11 @@
+# =========
+# Temporary
+# =========
+
+# Added in Python 3.10.20 (parameter `scripting`)
+html.parser.HTMLParser.__init__
+
+
 # =======
 # <= 3.12
 # =======
diff --git a/stdlib/@tests/stubtest_allowlists/darwin-py311.txt b/stdlib/@tests/stubtest_allowlists/darwin-py311.txt
index 2d8079d43541..b389202caf35 100644
--- a/stdlib/@tests/stubtest_allowlists/darwin-py311.txt
+++ b/stdlib/@tests/stubtest_allowlists/darwin-py311.txt
@@ -1,3 +1,11 @@
+# =========
+# Temporary
+# =========
+
+# Added in Python 3.11.15 (parameter `scripting`)
+html.parser.HTMLParser.__init__
+
+
 # ============
 # 3.11 to 3.12
 # ============
diff --git a/stdlib/@tests/stubtest_allowlists/darwin-py312.txt b/stdlib/@tests/stubtest_allowlists/darwin-py312.txt
index c81581eb72b2..77684961b29b 100644
--- a/stdlib/@tests/stubtest_allowlists/darwin-py312.txt
+++ b/stdlib/@tests/stubtest_allowlists/darwin-py312.txt
@@ -1,3 +1,11 @@
+# =========
+# Temporary
+# =========
+
+# Added in Python 3.12.13 (parameter `scripting`)
+html.parser.HTMLParser.__init__
+
+
 # ============
 # 3.11 to 3.12
 # ============
diff --git a/stdlib/@tests/stubtest_allowlists/darwin-py39.txt b/stdlib/@tests/stubtest_allowlists/darwin-py39.txt
index 59728a27f23c..6c94d5c2030a 100644
--- a/stdlib/@tests/stubtest_allowlists/darwin-py39.txt
+++ b/stdlib/@tests/stubtest_allowlists/darwin-py39.txt
@@ -1,3 +1,11 @@
+# =========
+# Temporary
+# =========
+
+# Added in Python 3.9.25 (parameter `scripting`)
+html.parser.HTMLParser.__init__
+
+
 # =======
 # <= 3.12
 # =======
diff --git a/stdlib/@tests/stubtest_allowlists/darwin.txt b/stdlib/@tests/stubtest_allowlists/darwin.txt
index 4b8d1d041499..bee977f6d21d 100644
--- a/stdlib/@tests/stubtest_allowlists/darwin.txt
+++ b/stdlib/@tests/stubtest_allowlists/darwin.txt
@@ -10,14 +10,6 @@
 (fcntl.F_SETLEASE)?  # GNU extension
 
 
-# =======
-# <= 3.14
-# =======
-
-# Added in Python 3.9.25, 3.10.20, 3.11.15, 3.12.13, 3.13.10, 3.14.1 (parameter `scripting`)
-html.parser.HTMLParser.__init__
-
-
 # ==========================================
 # Modules that do not exist on MacOS systems
 # ==========================================
diff --git a/stdlib/@tests/stubtest_allowlists/linux-py310.txt b/stdlib/@tests/stubtest_allowlists/linux-py310.txt
index 559c5d4ce8bf..7673e9c65d23 100644
--- a/stdlib/@tests/stubtest_allowlists/linux-py310.txt
+++ b/stdlib/@tests/stubtest_allowlists/linux-py310.txt
@@ -1,6 +1,6 @@
-# =======
-# <= 3.14
-# =======
+# =========
+# Temporary
+# =========
 
 # Added in Python 3.10.20 (parameter `scripting`)
 html.parser.HTMLParser.__init__
diff --git a/stdlib/@tests/stubtest_allowlists/linux-py311.txt b/stdlib/@tests/stubtest_allowlists/linux-py311.txt
index ce9d5d89f298..671201251e99 100644
--- a/stdlib/@tests/stubtest_allowlists/linux-py311.txt
+++ b/stdlib/@tests/stubtest_allowlists/linux-py311.txt
@@ -1,6 +1,6 @@
-# =======
-# <= 3.14
-# =======
+# =========
+# Temporary
+# =========
 
 # Added in Python 3.11.15 (parameter `scripting`)
 html.parser.HTMLParser.__init__
diff --git a/stdlib/@tests/stubtest_allowlists/linux-py312.txt b/stdlib/@tests/stubtest_allowlists/linux-py312.txt
index 602a661fbc95..9ce8bbf9e13b 100644
--- a/stdlib/@tests/stubtest_allowlists/linux-py312.txt
+++ b/stdlib/@tests/stubtest_allowlists/linux-py312.txt
@@ -1,6 +1,6 @@
-# =======
-# <= 3.14
-# =======
+# =========
+# Temporary
+# =========
 
 # Added in Python 3.12.13 (parameter `scripting`)
 html.parser.HTMLParser.__init__
diff --git a/stdlib/@tests/stubtest_allowlists/linux-py313.txt b/stdlib/@tests/stubtest_allowlists/linux-py313.txt
deleted file mode 100644
index 672b0cf50e09..000000000000
--- a/stdlib/@tests/stubtest_allowlists/linux-py313.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-# =======
-# <= 3.14
-# =======
-
-# Added in Python 3.13.10 (parameter `scripting`)
-html.parser.HTMLParser.__init__
diff --git a/stdlib/@tests/stubtest_allowlists/linux-py314.txt b/stdlib/@tests/stubtest_allowlists/linux-py314.txt
deleted file mode 100644
index 2e5d4a88255d..000000000000
--- a/stdlib/@tests/stubtest_allowlists/linux-py314.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-# =======
-# <= 3.14
-# =======
-
-# Added in Python 3.14.1 (parameter `scripting`)
-html.parser.HTMLParser.__init__
diff --git a/stdlib/@tests/stubtest_allowlists/win32-py310.txt b/stdlib/@tests/stubtest_allowlists/win32-py310.txt
index a49447e799b3..1c26b320d918 100644
--- a/stdlib/@tests/stubtest_allowlists/win32-py310.txt
+++ b/stdlib/@tests/stubtest_allowlists/win32-py310.txt
@@ -1,6 +1,9 @@
-# =======
-# <= 3.12
-# =======
+# =========
+# Temporary
+# =========
+
+# Added in Python 3.10.20 (parameter `scripting`)
+html.parser.HTMLParser.__init__
 
 # Added in Python 3.10.18 (parameter `escapable`)
 html.parser.HTMLParser.set_cdata_mode
diff --git a/stdlib/@tests/stubtest_allowlists/win32-py311.txt b/stdlib/@tests/stubtest_allowlists/win32-py311.txt
index 62c544055dcc..bcc6d7c17ad4 100644
--- a/stdlib/@tests/stubtest_allowlists/win32-py311.txt
+++ b/stdlib/@tests/stubtest_allowlists/win32-py311.txt
@@ -1,6 +1,9 @@
-# =======
-# <= 3.12
-# =======
+# =========
+# Temporary
+# =========
+
+# Added in Python 3.11.15 (parameter `scripting`)
+html.parser.HTMLParser.__init__
 
 # Added in Python 3.11.13 (parameter `escapable`)
 html.parser.HTMLParser.set_cdata_mode
diff --git a/stdlib/@tests/stubtest_allowlists/win32-py312.txt b/stdlib/@tests/stubtest_allowlists/win32-py312.txt
index 1c808d36db4e..c977d31f24eb 100644
--- a/stdlib/@tests/stubtest_allowlists/win32-py312.txt
+++ b/stdlib/@tests/stubtest_allowlists/win32-py312.txt
@@ -1,3 +1,11 @@
+# =========
+# Temporary
+# =========
+
+# Added in Python 3.12.13 (parameter `scripting`)
+html.parser.HTMLParser.__init__
+
+
 # =======
 # >= 3.12
 # =======
diff --git a/stdlib/@tests/stubtest_allowlists/win32-py39.txt b/stdlib/@tests/stubtest_allowlists/win32-py39.txt
index ace75c0b6c20..26af9746ff27 100644
--- a/stdlib/@tests/stubtest_allowlists/win32-py39.txt
+++ b/stdlib/@tests/stubtest_allowlists/win32-py39.txt
@@ -1,6 +1,9 @@
-# =======
-# <= 3.12
-# =======
+# =========
+# Temporary
+# =========
+
+# Added in Python 3.9.25 (parameter `scripting`)
+html.parser.HTMLParser.__init__
 
 # Added in Python 3.9.23 (parameter `escapable`)
 html.parser.HTMLParser.set_cdata_mode
diff --git a/stdlib/@tests/stubtest_allowlists/win32.txt b/stdlib/@tests/stubtest_allowlists/win32.txt
index 1ac5529e7ebe..66695e1d87d3 100644
--- a/stdlib/@tests/stubtest_allowlists/win32.txt
+++ b/stdlib/@tests/stubtest_allowlists/win32.txt
@@ -9,14 +9,6 @@ _winapi.OpenFileMapping
 _winapi.VirtualQuerySize
 
 
-# =======
-# <= 3.14
-# =======
-
-# Added in Python 3.9.25, 3.10.20, 3.11.15, 3.12.13, 3.13.10, 3.14.1 (parameter `scripting`)
-html.parser.HTMLParser.__init__
-
-
 # ============================================
 # Modules that do not exist on Windows systems
 # ============================================

From a3c8f7ce1e5f7e840e4756a1a21a27760d03fe86 Mon Sep 17 00:00:00 2001
From: Sebastian Rittau <sebastian.rittau@zfutura.de>
Date: Thu, 4 Dec 2025 12:42:04 +0100
Subject: [PATCH 04/13] Remove errno.ENOTCAPABLE from one allowlist

---
 stdlib/@tests/stubtest_allowlists/darwin-py313.txt | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/stdlib/@tests/stubtest_allowlists/darwin-py313.txt b/stdlib/@tests/stubtest_allowlists/darwin-py313.txt
index 8e59e29c1ecb..bb7f4bba4c2f 100644
--- a/stdlib/@tests/stubtest_allowlists/darwin-py313.txt
+++ b/stdlib/@tests/stubtest_allowlists/darwin-py313.txt
@@ -3,10 +3,3 @@
 # =======
 
 (mmap.MAP_32BIT)?  # Exists locally on MacOS but not on GitHub
-
-# ================
-# Unclear problems
-# ================
-
-# Added in 3.11.1, flagged by stubtest on Python < 3.14 for unknown reasons
-errno.ENOTCAPABLE

From c879ba220558ccb6b0d3760f3cea81398dbf7818 Mon Sep 17 00:00:00 2001
From: Sebastian Rittau <sebastian.rittau@zfutura.de>
Date: Thu, 4 Dec 2025 12:47:56 +0100
Subject: [PATCH 05/13] heapq: Extend __all__ (3.14+)

---
 stdlib/heapq.pyi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/stdlib/heapq.pyi b/stdlib/heapq.pyi
index 220c41f303fb..62a1750f75e1 100644
--- a/stdlib/heapq.pyi
+++ b/stdlib/heapq.pyi
@@ -1,3 +1,4 @@
+import sys
 from _heapq import *
 from _typeshed import SupportsRichComparison
 from collections.abc import Callable, Generator, Iterable
@@ -5,6 +6,15 @@ from typing import Any, Final, TypeVar
 
 __all__ = ["heappush", "heappop", "heapify", "heapreplace", "merge", "nlargest", "nsmallest", "heappushpop"]
 
+if sys.version_info >= (3, 14):
+    __all__ += [
+        "heapify_max",
+        "heappop_max",
+        "heappush_max",
+        "heappushpop_max",
+        "heapreplace_max",
+    ]
+
 _S = TypeVar("_S")
 
 __about__: Final[str]

From da12ef80e6513b349bd7e8949185c9f3f3002f36 Mon Sep 17 00:00:00 2001
From: Sebastian Rittau <sebastian.rittau@zfutura.de>
Date: Thu, 4 Dec 2025 12:49:04 +0100
Subject: [PATCH 06/13] Add a comment

---
 stdlib/heapq.pyi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/stdlib/heapq.pyi b/stdlib/heapq.pyi
index 62a1750f75e1..9fc71019fe08 100644
--- a/stdlib/heapq.pyi
+++ b/stdlib/heapq.pyi
@@ -7,6 +7,7 @@ from typing import Any, Final, TypeVar
 __all__ = ["heappush", "heappop", "heapify", "heapreplace", "merge", "nlargest", "nsmallest", "heappushpop"]
 
 if sys.version_info >= (3, 14):
+    # Added to __all__ in 3.14.1
     __all__ += [
         "heapify_max",
         "heappop_max",

From ca029b34f1c794c187765c0cdbf3636fdd9d3dd8 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Thu, 4 Dec 2025 11:52:12 +0000
Subject: [PATCH 07/13] [pre-commit.ci] auto fixes from pre-commit.com hooks

---
 stdlib/heapq.pyi | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/stdlib/heapq.pyi b/stdlib/heapq.pyi
index 9fc71019fe08..ff8ba7ff1f82 100644
--- a/stdlib/heapq.pyi
+++ b/stdlib/heapq.pyi
@@ -8,13 +8,7 @@ __all__ = ["heappush", "heappop", "heapify", "heapreplace", "merge", "nlargest",
 
 if sys.version_info >= (3, 14):
     # Added to __all__ in 3.14.1
-    __all__ += [
-        "heapify_max",
-        "heappop_max",
-        "heappush_max",
-        "heappushpop_max",
-        "heapreplace_max",
-    ]
+    __all__ += ["heapify_max", "heappop_max", "heappush_max", "heappushpop_max", "heapreplace_max"]
 
 _S = TypeVar("_S")
 

From 717c20ee7b6f30d7cb3d40914dbb187c7e8dd645 Mon Sep 17 00:00:00 2001
From: Sebastian Rittau <sebastian.rittau@zfutura.de>
Date: Thu, 4 Dec 2025 13:04:34 +0100
Subject: [PATCH 08/13] Mark mmap arguments as positional-only

---
 stdlib/mmap.pyi | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/stdlib/mmap.pyi b/stdlib/mmap.pyi
index 8a5baba62914..aaf6e5823af6 100644
--- a/stdlib/mmap.pyi
+++ b/stdlib/mmap.pyi
@@ -54,28 +54,28 @@ class mmap:
             ) -> Self: ...
 
     def close(self) -> None: ...
-    def flush(self, offset: int = 0, size: int = ...) -> None: ...
-    def move(self, dest: int, src: int, count: int) -> None: ...
+    def flush(self, offset: int = 0, size: int = ..., /) -> None: ...
+    def move(self, dest: int, src: int, count: int, /) -> None: ...
     def read_byte(self) -> int: ...
     def readline(self) -> bytes: ...
-    def resize(self, newsize: int) -> None: ...
+    def resize(self, newsize: int, /) -> None: ...
     if sys.platform != "win32":
-        def seek(self, pos: int, whence: Literal[0, 1, 2, 3, 4] = os.SEEK_SET) -> None: ...
+        def seek(self, pos: int, whence: Literal[0, 1, 2, 3, 4] = os.SEEK_SET, /) -> None: ...
     else:
-        def seek(self, pos: int, whence: Literal[0, 1, 2] = os.SEEK_SET) -> None: ...
+        def seek(self, pos: int, whence: Literal[0, 1, 2] = os.SEEK_SET, /) -> None: ...
 
     def size(self) -> int: ...
     def tell(self) -> int: ...
-    def write_byte(self, byte: int) -> None: ...
+    def write_byte(self, byte: int, /) -> None: ...
     def __len__(self) -> int: ...
     closed: bool
     if sys.platform != "win32":
-        def madvise(self, option: int, start: int = 0, length: int = ...) -> None: ...
+        def madvise(self, option: int, start: int = 0, length: int = ..., /) -> None: ...
 
-    def find(self, sub: ReadableBuffer, start: int = ..., stop: int = ...) -> int: ...
-    def rfind(self, sub: ReadableBuffer, start: int = ..., stop: int = ...) -> int: ...
-    def read(self, n: int | None = None) -> bytes: ...
-    def write(self, bytes: ReadableBuffer) -> int: ...
+    def find(self, view: ReadableBuffer, start: int = ..., stop: int = ..., /) -> int: ...
+    def rfind(self, view: ReadableBuffer, start: int = ..., stop: int = ..., /) -> int: ...
+    def read(self, n: int | None = None, /) -> bytes: ...
+    def write(self, bytes: ReadableBuffer, /) -> int: ...
     @overload
     def __getitem__(self, key: int, /) -> int: ...
     @overload
@@ -92,7 +92,7 @@ class mmap:
     # so we claim that there is also an __iter__ to help type checkers.
     def __iter__(self) -> Iterator[int]: ...
     def __enter__(self) -> Self: ...
-    def __exit__(self, *args: Unused) -> None: ...
+    def __exit__(self, exc_type: Unused, exc_value: Unused, traceback: Unused, /) -> None: ...
     def __buffer__(self, flags: int, /) -> memoryview: ...
     def __release_buffer__(self, buffer: memoryview, /) -> None: ...
     if sys.version_info >= (3, 13):

From e7b49b3bbde47fa070e5b0974e00bf3744d8612a Mon Sep 17 00:00:00 2001
From: Sebastian Rittau <sebastian.rittau@zfutura.de>
Date: Thu, 4 Dec 2025 13:15:18 +0100
Subject: [PATCH 09/13] More mmap fixes

---
 stdlib/@tests/stubtest_allowlists/py314.txt | 7 +++++++
 stdlib/mmap.pyi                             | 4 ++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/stdlib/@tests/stubtest_allowlists/py314.txt b/stdlib/@tests/stubtest_allowlists/py314.txt
index d3fd3a15592a..45a45741dd1d 100644
--- a/stdlib/@tests/stubtest_allowlists/py314.txt
+++ b/stdlib/@tests/stubtest_allowlists/py314.txt
@@ -43,6 +43,13 @@ importlib.util.Loader.exec_module  # See Lib/importlib/_abc.py. Might be defined
 threading.Condition.locked
 multiprocessing.dummy.Condition.locked
 
+# Starting with Python 3.14.1, these methods accept None for some of their
+# parameters, but would raise a TypeError with Python 3.14.0.
+mmap.mmap.find
+mmap.mmap.flush
+mmap.mmap.madvise
+mmap.mmap.rfind
+
 # ====================================
 # Pre-existing errors from Python 3.13
 # ====================================
diff --git a/stdlib/mmap.pyi b/stdlib/mmap.pyi
index aaf6e5823af6..98183acba40f 100644
--- a/stdlib/mmap.pyi
+++ b/stdlib/mmap.pyi
@@ -72,8 +72,8 @@ class mmap:
     if sys.platform != "win32":
         def madvise(self, option: int, start: int = 0, length: int = ..., /) -> None: ...
 
-    def find(self, view: ReadableBuffer, start: int = ..., stop: int = ..., /) -> int: ...
-    def rfind(self, view: ReadableBuffer, start: int = ..., stop: int = ..., /) -> int: ...
+    def find(self, view: ReadableBuffer, start: int = ..., end: int = ..., /) -> int: ...
+    def rfind(self, view: ReadableBuffer, start: int = ..., end: int = ..., /) -> int: ...
     def read(self, n: int | None = None, /) -> bytes: ...
     def write(self, bytes: ReadableBuffer, /) -> int: ...
     @overload

From c471c87835345aa556db92e88cea9ccf2a069208 Mon Sep 17 00:00:00 2001
From: Sebastian Rittau <sebastian.rittau@zfutura.de>
Date: Thu, 4 Dec 2025 13:23:16 +0100
Subject: [PATCH 10/13] Multiprocessing fixes

---
 stdlib/@tests/stubtest_allowlists/py314.txt |  1 +
 stdlib/multiprocessing/dummy/__init__.pyi   | 28 +++++++++++++++------
 2 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/stdlib/@tests/stubtest_allowlists/py314.txt b/stdlib/@tests/stubtest_allowlists/py314.txt
index 45a45741dd1d..51580f0e298c 100644
--- a/stdlib/@tests/stubtest_allowlists/py314.txt
+++ b/stdlib/@tests/stubtest_allowlists/py314.txt
@@ -49,6 +49,7 @@ mmap.mmap.find
 mmap.mmap.flush
 mmap.mmap.madvise
 mmap.mmap.rfind
+multiprocessing.process.BaseProcess.__init__
 
 # ====================================
 # Pre-existing errors from Python 3.13
diff --git a/stdlib/multiprocessing/dummy/__init__.pyi b/stdlib/multiprocessing/dummy/__init__.pyi
index 3cbeeb057791..62fef2b080f2 100644
--- a/stdlib/multiprocessing/dummy/__init__.pyi
+++ b/stdlib/multiprocessing/dummy/__init__.pyi
@@ -1,4 +1,5 @@
 import array
+import sys
 import threading
 import weakref
 from collections.abc import Callable, Iterable, Mapping, Sequence
@@ -44,14 +45,25 @@ class DummyProcess(threading.Thread):
     _start_called: int
     @property
     def exitcode(self) -> Literal[0] | None: ...
-    def __init__(
-        self,
-        group: Any = None,
-        target: Callable[..., object] | None = None,
-        name: str | None = None,
-        args: Iterable[Any] = (),
-        kwargs: Mapping[str, Any] = {},
-    ) -> None: ...
+    if sys.version_info >= (3, 14):
+        # Default changed in Python 3.14.1
+        def __init__(
+            self,
+            group: Any = None,
+            target: Callable[..., object] | None = None,
+            name: str | None = None,
+            args: Iterable[Any] = (),
+            kwargs: Mapping[str, Any] | None = None,
+        ) -> None: ...
+    else:
+        def __init__(
+            self,
+            group: Any = None,
+            target: Callable[..., object] | None = None,
+            name: str | None = None,
+            args: Iterable[Any] = (),
+            kwargs: Mapping[str, Any] | None = {},
+        ) -> None: ...
 
 Process = DummyProcess
 

From 89fa38c2b9ceef32f929dd83f25d755bc19202a9 Mon Sep 17 00:00:00 2001
From: Sebastian Rittau <sebastian.rittau@zfutura.de>
Date: Thu, 4 Dec 2025 13:25:22 +0100
Subject: [PATCH 11/13] Change os.__all__

---
 stdlib/os/__init__.pyi | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/stdlib/os/__init__.pyi b/stdlib/os/__init__.pyi
index bb0a57153948..5d0a536bced9 100644
--- a/stdlib/os/__init__.pyi
+++ b/stdlib/os/__init__.pyi
@@ -174,7 +174,8 @@ __all__ = [
     "write",
 ]
 if sys.version_info >= (3, 14):
-    __all__ += ["readinto"]
+    # reload_environ was added to __all__ in Python 3.14.1
+    __all__ += ["readinto", "reload_environ"]
 if sys.platform == "darwin" and sys.version_info >= (3, 12):
     __all__ += ["PRIO_DARWIN_BG", "PRIO_DARWIN_NONUI", "PRIO_DARWIN_PROCESS", "PRIO_DARWIN_THREAD"]
 if sys.platform == "darwin" and sys.version_info >= (3, 10):

From 1e741457220b8eb46655bd130a11aa555dbac0c7 Mon Sep 17 00:00:00 2001
From: Sebastian Rittau <sebastian.rittau@zfutura.de>
Date: Thu, 4 Dec 2025 13:26:05 +0100
Subject: [PATCH 12/13] Add rlcompleter

---
 stdlib/pdb.pyi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/stdlib/pdb.pyi b/stdlib/pdb.pyi
index 2f114b20572d..f936e94cda90 100644
--- a/stdlib/pdb.pyi
+++ b/stdlib/pdb.pyi
@@ -201,8 +201,8 @@ class Pdb(Bdb, Cmd):
         def completenames(self, text: str, line: str, begidx: int, endidx: int) -> list[str]: ...  # type: ignore[override]
     if sys.version_info >= (3, 12):
         def set_convenience_variable(self, frame: FrameType, name: str, value: Any) -> None: ...
-    if sys.version_info >= (3, 13) and sys.version_info < (3, 14):
-        # Added in 3.13.8.
+    if sys.version_info >= (3, 13):
+        # Added in 3.13.8 and 3.14.1
         @property
         def rlcompleter(self) -> type[Completer]: ...
 

From b002320a5305d62138f5f36077738a123d15e1f7 Mon Sep 17 00:00:00 2001
From: Sebastian Rittau <sebastian.rittau@zfutura.de>
Date: Thu, 4 Dec 2025 13:31:32 +0100
Subject: [PATCH 13/13] madvise doesn't exist on win32

---
 stdlib/@tests/stubtest_allowlists/darwin-py314.txt | 8 ++++++++
 stdlib/@tests/stubtest_allowlists/linux-py314.txt  | 7 +++++++
 stdlib/@tests/stubtest_allowlists/py314.txt        | 1 -
 3 files changed, 15 insertions(+), 1 deletion(-)
 create mode 100644 stdlib/@tests/stubtest_allowlists/linux-py314.txt

diff --git a/stdlib/@tests/stubtest_allowlists/darwin-py314.txt b/stdlib/@tests/stubtest_allowlists/darwin-py314.txt
index bb7f4bba4c2f..ddd16a1acb74 100644
--- a/stdlib/@tests/stubtest_allowlists/darwin-py314.txt
+++ b/stdlib/@tests/stubtest_allowlists/darwin-py314.txt
@@ -1,3 +1,11 @@
+# =========
+# 3.14 only
+# =========
+
+# Starting with Python 3.14.1, these methods accept None for some of their
+# parameters, but would raise a TypeError with Python 3.14.0.
+mmap.mmap.madvise
+
 # =======
 # >= 3.13
 # =======
diff --git a/stdlib/@tests/stubtest_allowlists/linux-py314.txt b/stdlib/@tests/stubtest_allowlists/linux-py314.txt
new file mode 100644
index 000000000000..98f33e427a30
--- /dev/null
+++ b/stdlib/@tests/stubtest_allowlists/linux-py314.txt
@@ -0,0 +1,7 @@
+# =========
+# 3.14 only
+# =========
+
+# Starting with Python 3.14.1, these methods accept None for some of their
+# parameters, but would raise a TypeError with Python 3.14.0.
+mmap.mmap.madvise
diff --git a/stdlib/@tests/stubtest_allowlists/py314.txt b/stdlib/@tests/stubtest_allowlists/py314.txt
index 51580f0e298c..ddb0c396a0da 100644
--- a/stdlib/@tests/stubtest_allowlists/py314.txt
+++ b/stdlib/@tests/stubtest_allowlists/py314.txt
@@ -47,7 +47,6 @@ multiprocessing.dummy.Condition.locked
 # parameters, but would raise a TypeError with Python 3.14.0.
 mmap.mmap.find
 mmap.mmap.flush
-mmap.mmap.madvise
 mmap.mmap.rfind
 multiprocessing.process.BaseProcess.__init__