diff --git a/stdlib/_csv.pyi b/stdlib/_csv.pyi
index ecea4878907c..351ccd6a1f46 100644
--- a/stdlib/_csv.pyi
+++ b/stdlib/_csv.pyi
@@ -1,9 +1,8 @@
 import csv
 import sys
-from _typeshed import SupportsWrite
 from collections.abc import Iterable
 from typing import Any, Final, Literal, type_check_only
-from typing_extensions import Self, TypeAlias
+from typing_extensions import Self, TypeAlias, Writer as _Writer
 
 __version__: Final[str]
 
@@ -89,7 +88,7 @@ else:
         def writerows(self, rows: Iterable[Iterable[Any]]) -> None: ...
 
 def writer(
-    csvfile: SupportsWrite[str],
+    csvfile: _Writer[str],
     dialect: _DialectLike = "excel",
     *,
     delimiter: str = ",",
diff --git a/stdlib/_curses.pyi b/stdlib/_curses.pyi
index f21a9ca60270..ee6b402450d9 100644
--- a/stdlib/_curses.pyi
+++ b/stdlib/_curses.pyi
@@ -1,8 +1,8 @@
 import sys
-from _typeshed import ReadOnlyBuffer, SupportsRead, SupportsWrite
+from _typeshed import ReadOnlyBuffer
 from curses import _ncurses_version
 from typing import Any, final, overload
-from typing_extensions import TypeAlias
+from typing_extensions import Reader, TypeAlias, Writer
 
 # NOTE: This module is ordinarily only available on Unix, but the windows-curses
 # package makes it available on Windows as well with the same contents.
@@ -297,7 +297,7 @@ def get_escdelay() -> int: ...
 def get_tabsize() -> int: ...
 def getmouse() -> tuple[int, int, int, int, int]: ...
 def getsyx() -> tuple[int, int]: ...
-def getwin(file: SupportsRead[bytes], /) -> window: ...
+def getwin(file: Reader[bytes], /) -> window: ...
 def halfdelay(tenths: int, /) -> None: ...
 def has_colors() -> bool: ...
 
@@ -515,7 +515,7 @@ class window:  # undocumented
     def overwrite(
         self, destwin: window, sminrow: int, smincol: int, dminrow: int, dmincol: int, dmaxrow: int, dmaxcol: int
     ) -> None: ...
-    def putwin(self, file: SupportsWrite[bytes], /) -> None: ...
+    def putwin(self, file: Writer[bytes], /) -> None: ...
     def redrawln(self, beg: int, num: int, /) -> None: ...
     def redrawwin(self) -> None: ...
     @overload
diff --git a/stdlib/_pickle.pyi b/stdlib/_pickle.pyi
index 8e8afb600efa..099d0d29816d 100644
--- a/stdlib/_pickle.pyi
+++ b/stdlib/_pickle.pyi
@@ -1,8 +1,8 @@
-from _typeshed import ReadableBuffer, SupportsWrite
+from _typeshed import ReadableBuffer
 from collections.abc import Callable, Iterable, Iterator, Mapping
 from pickle import PickleBuffer as PickleBuffer
 from typing import Any, Protocol, type_check_only
-from typing_extensions import TypeAlias
+from typing_extensions import TypeAlias, Writer
 
 class _ReadableFileobj(Protocol):
     def read(self, n: int, /) -> bytes: ...
@@ -20,7 +20,7 @@ _ReducedType: TypeAlias = (
 
 def dump(
     obj: Any,
-    file: SupportsWrite[bytes],
+    file: Writer[bytes],
     protocol: int | None = None,
     *,
     fix_imports: bool = True,
@@ -62,11 +62,7 @@ class Pickler:
     reducer_override: Callable[[Any], Any]
     bin: bool  # undocumented
     def __init__(
-        self,
-        file: SupportsWrite[bytes],
-        protocol: int | None = None,
-        fix_imports: bool = True,
-        buffer_callback: _BufferCallback = None,
+        self, file: Writer[bytes], protocol: int | None = None, fix_imports: bool = True, buffer_callback: _BufferCallback = None
     ) -> None: ...
     @property
     def memo(self) -> PicklerMemoProxy: ...
diff --git a/stdlib/_typeshed/__init__.pyi b/stdlib/_typeshed/__init__.pyi
index f322244016dd..0eaee4279d0d 100644
--- a/stdlib/_typeshed/__init__.pyi
+++ b/stdlib/_typeshed/__init__.pyi
@@ -22,7 +22,7 @@ from typing import (
     final,
     overload,
 )
-from typing_extensions import Buffer, LiteralString, Self as _Self, TypeAlias
+from typing_extensions import Buffer, LiteralString, Self as _Self, TypeAlias, deprecated
 
 _KT = TypeVar("_KT")
 _KT_co = TypeVar("_KT_co", covariant=True)
@@ -253,7 +253,7 @@ FileDescriptor: TypeAlias = int  # stable
 FileDescriptorLike: TypeAlias = int | HasFileno  # stable
 FileDescriptorOrPath: TypeAlias = int | StrOrBytesPath
 
-# stable
+@deprecated("Use typing_extensions.Reader instead. Will be removed in December 2025 or later.")
 class SupportsRead(Protocol[_T_co]):
     def read(self, length: int = ..., /) -> _T_co: ...
 
@@ -265,7 +265,7 @@ class SupportsReadline(Protocol[_T_co]):
 class SupportsNoArgReadline(Protocol[_T_co]):
     def readline(self) -> _T_co: ...
 
-# stable
+@deprecated("Use typing_extensions.Writer instead. Will be removed in December 2025 or later.")
 class SupportsWrite(Protocol[_T_contra]):
     def write(self, s: _T_contra, /) -> object: ...
 
diff --git a/stdlib/abc.pyi b/stdlib/abc.pyi
index fdca48ac7aaf..20acec96138d 100644
--- a/stdlib/abc.pyi
+++ b/stdlib/abc.pyi
@@ -1,9 +1,8 @@
 import _typeshed
 import sys
-from _typeshed import SupportsWrite
 from collections.abc import Callable
 from typing import Any, Literal, TypeVar
-from typing_extensions import Concatenate, ParamSpec, deprecated
+from typing_extensions import Concatenate, ParamSpec, Writer, deprecated
 
 _T = TypeVar("_T")
 _R_co = TypeVar("_R_co", covariant=True)
@@ -24,7 +23,7 @@ class ABCMeta(type):
 
     def __instancecheck__(cls: ABCMeta, instance: Any) -> bool: ...
     def __subclasscheck__(cls: ABCMeta, subclass: type) -> bool: ...
-    def _dump_registry(cls: ABCMeta, file: SupportsWrite[str] | None = None) -> None: ...
+    def _dump_registry(cls: ABCMeta, file: Writer[str] | None = None) -> None: ...
     def register(cls: ABCMeta, subclass: type[_T]) -> type[_T]: ...
 
 def abstractmethod(funcobj: _FuncT) -> _FuncT: ...
diff --git a/stdlib/argparse.pyi b/stdlib/argparse.pyi
index 312093c0aa55..7c3717db8590 100644
--- a/stdlib/argparse.pyi
+++ b/stdlib/argparse.pyi
@@ -1,9 +1,9 @@
 import sys
-from _typeshed import SupportsWrite, sentinel
+from _typeshed import sentinel
 from collections.abc import Callable, Generator, Iterable, Sequence
 from re import Pattern
 from typing import IO, Any, ClassVar, Final, Generic, NoReturn, Protocol, TypeVar, overload
-from typing_extensions import Self, TypeAlias, deprecated
+from typing_extensions import Self, TypeAlias, Writer, deprecated
 
 __all__ = [
     "ArgumentParser",
@@ -208,8 +208,8 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
         help: str | None = None,
         metavar: str | None = None,
     ) -> _SubParsersAction[_ArgumentParserT]: ...
-    def print_usage(self, file: SupportsWrite[str] | None = None) -> None: ...
-    def print_help(self, file: SupportsWrite[str] | None = None) -> None: ...
+    def print_usage(self, file: Writer[str] | None = None) -> None: ...
+    def print_help(self, file: Writer[str] | None = None) -> None: ...
     def format_usage(self) -> str: ...
     def format_help(self) -> str: ...
     @overload
@@ -255,7 +255,7 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
     def _get_value(self, action: Action, arg_string: str) -> Any: ...
     def _check_value(self, action: Action, value: Any) -> None: ...
     def _get_formatter(self) -> HelpFormatter: ...
-    def _print_message(self, message: str, file: SupportsWrite[str] | None = None) -> None: ...
+    def _print_message(self, message: str, file: Writer[str] | None = None) -> None: ...
 
 class HelpFormatter:
     # undocumented
diff --git a/stdlib/array.pyi b/stdlib/array.pyi
index bd96c9bc2d31..687fd8510908 100644
--- a/stdlib/array.pyi
+++ b/stdlib/array.pyi
@@ -1,9 +1,9 @@
 import sys
-from _typeshed import ReadableBuffer, SupportsRead, SupportsWrite
+from _typeshed import ReadableBuffer
 from collections.abc import Iterable, MutableSequence
 from types import GenericAlias
 from typing import Any, ClassVar, Literal, SupportsIndex, TypeVar, overload
-from typing_extensions import Self, TypeAlias
+from typing_extensions import Reader, Self, TypeAlias, Writer
 
 _IntTypeCode: TypeAlias = Literal["b", "B", "h", "H", "i", "I", "l", "L", "q", "Q"]
 _FloatTypeCode: TypeAlias = Literal["f", "d"]
@@ -41,7 +41,7 @@ class array(MutableSequence[_T]):
     def count(self, v: _T, /) -> int: ...
     def extend(self, bb: Iterable[_T], /) -> None: ...
     def frombytes(self, buffer: ReadableBuffer, /) -> None: ...
-    def fromfile(self, f: SupportsRead[bytes], n: int, /) -> None: ...
+    def fromfile(self, f: Reader[bytes], n: int, /) -> None: ...
     def fromlist(self, list: list[_T], /) -> None: ...
     def fromunicode(self, ustr: str, /) -> None: ...
     if sys.version_info >= (3, 10):
@@ -53,7 +53,7 @@ class array(MutableSequence[_T]):
     def pop(self, i: int = -1, /) -> _T: ...
     def remove(self, v: _T, /) -> None: ...
     def tobytes(self) -> bytes: ...
-    def tofile(self, f: SupportsWrite[bytes], /) -> None: ...
+    def tofile(self, f: Writer[bytes], /) -> None: ...
     def tolist(self) -> list[_T]: ...
     def tounicode(self) -> str: ...
 
diff --git a/stdlib/asyncio/graph.pyi b/stdlib/asyncio/graph.pyi
index cb2cf0174995..bb39b5d452d8 100644
--- a/stdlib/asyncio/graph.pyi
+++ b/stdlib/asyncio/graph.pyi
@@ -1,8 +1,8 @@
-from _typeshed import SupportsWrite
 from asyncio import Future
 from dataclasses import dataclass
 from types import FrameType
 from typing import Any, overload
+from typing_extensions import Writer
 
 __all__ = ("capture_call_graph", "format_call_graph", "print_call_graph", "FrameCallGraphEntry", "FutureCallGraph")
 
@@ -22,5 +22,5 @@ def capture_call_graph(future: None = None, /, *, depth: int = 1, limit: int | N
 def capture_call_graph(future: Future[Any], /, *, depth: int = 1, limit: int | None = None) -> FutureCallGraph | None: ...
 def format_call_graph(future: Future[Any] | None = None, /, *, depth: int = 1, limit: int | None = None) -> str: ...
 def print_call_graph(
-    future: Future[Any] | None = None, /, *, file: SupportsWrite[str] | None = None, depth: int = 1, limit: int | None = None
+    future: Future[Any] | None = None, /, *, file: Writer[str] | None = None, depth: int = 1, limit: int | None = None
 ) -> None: ...
diff --git a/stdlib/builtins.pyi b/stdlib/builtins.pyi
index 8de58f1a3d43..1ad1c6800a07 100644
--- a/stdlib/builtins.pyi
+++ b/stdlib/builtins.pyi
@@ -28,7 +28,6 @@ from _typeshed import (
     SupportsRDivMod,
     SupportsRichComparison,
     SupportsRichComparisonT,
-    SupportsWrite,
 )
 from collections.abc import Awaitable, Callable, Iterable, Iterator, MutableSet, Reversible, Set as AbstractSet, Sized
 from io import BufferedRandom, BufferedReader, BufferedWriter, FileIO, TextIOWrapper
@@ -70,6 +69,7 @@ from typing_extensions import (  # noqa: Y023
     TypeGuard,
     TypeIs,
     TypeVarTuple,
+    Writer,
     deprecated,
 )
 
@@ -1768,15 +1768,11 @@ def open(
 ) -> IO[Any]: ...
 def ord(c: str | bytes | bytearray, /) -> int: ...
 
-class _SupportsWriteAndFlush(SupportsWrite[_T_contra], SupportsFlush, Protocol[_T_contra]): ...
+class _SupportsWriteAndFlush(Writer[_T_contra], SupportsFlush, Protocol[_T_contra]): ...
 
 @overload
 def print(
-    *values: object,
-    sep: str | None = " ",
-    end: str | None = "\n",
-    file: SupportsWrite[str] | None = None,
-    flush: Literal[False] = False,
+    *values: object, sep: str | None = " ", end: str | None = "\n", file: Writer[str] | None = None, flush: Literal[False] = False
 ) -> None: ...
 @overload
 def print(
diff --git a/stdlib/configparser.pyi b/stdlib/configparser.pyi
index 15c564c02589..4d34bbac3f54 100644
--- a/stdlib/configparser.pyi
+++ b/stdlib/configparser.pyi
@@ -1,9 +1,9 @@
 import sys
-from _typeshed import MaybeNone, StrOrBytesPath, SupportsWrite
+from _typeshed import MaybeNone, StrOrBytesPath
 from collections.abc import Callable, ItemsView, Iterable, Iterator, Mapping, MutableMapping, Sequence
 from re import Pattern
 from typing import Any, ClassVar, Final, Literal, TypeVar, overload
-from typing_extensions import TypeAlias
+from typing_extensions import TypeAlias, Writer
 
 if sys.version_info >= (3, 14):
     __all__ = (
@@ -312,7 +312,7 @@ class RawConfigParser(_Parser):
     @overload
     def items(self, section: _SectionName, raw: bool = False, vars: _Section | None = None) -> list[tuple[str, str]]: ...
     def set(self, section: _SectionName, option: str, value: str | None = None) -> None: ...
-    def write(self, fp: SupportsWrite[str], space_around_delimiters: bool = True) -> None: ...
+    def write(self, fp: Writer[str], space_around_delimiters: bool = True) -> None: ...
     def remove_option(self, section: _SectionName, option: str) -> bool: ...
     def remove_section(self, section: _SectionName) -> bool: ...
     def optionxform(self, optionstr: str) -> str: ...
diff --git a/stdlib/csv.pyi b/stdlib/csv.pyi
index 2c8e7109cdfc..af1aded74d8f 100644
--- a/stdlib/csv.pyi
+++ b/stdlib/csv.pyi
@@ -24,11 +24,10 @@ if sys.version_info >= (3, 10):
 else:
     from _csv import _reader as Reader, _writer as Writer
 
-from _typeshed import SupportsWrite
 from collections.abc import Collection, Iterable, Mapping, Sequence
 from types import GenericAlias
 from typing import Any, Generic, Literal, TypeVar, overload
-from typing_extensions import Self
+from typing_extensions import Self, Writer as _Writer
 
 __all__ = [
     "QUOTE_MINIMAL",
@@ -128,7 +127,7 @@ class DictWriter(Generic[_T]):
     writer: Writer
     def __init__(
         self,
-        f: SupportsWrite[str],
+        f: _Writer[str],
         fieldnames: Collection[_T],
         restval: Any | None = "",
         extrasaction: Literal["raise", "ignore"] = "raise",
diff --git a/stdlib/distutils/dist.pyi b/stdlib/distutils/dist.pyi
index 412b94131b54..9d99573953b5 100644
--- a/stdlib/distutils/dist.pyi
+++ b/stdlib/distutils/dist.pyi
@@ -1,4 +1,4 @@
-from _typeshed import Incomplete, StrOrBytesPath, StrPath, SupportsWrite
+from _typeshed import Incomplete, StrOrBytesPath, StrPath
 from collections.abc import Iterable, MutableMapping
 from distutils.cmd import Command
 from distutils.command.bdist import bdist
@@ -23,7 +23,7 @@ from distutils.command.sdist import sdist
 from distutils.command.upload import upload
 from re import Pattern
 from typing import IO, ClassVar, Literal, TypeVar, overload
-from typing_extensions import TypeAlias
+from typing_extensions import TypeAlias, Writer
 
 command_re: Pattern[str]
 
@@ -51,7 +51,7 @@ class DistributionMetadata:
     obsoletes: list[str] | None
     def read_pkg_file(self, file: IO[str]) -> None: ...
     def write_pkg_info(self, base_dir: StrPath) -> None: ...
-    def write_pkg_file(self, file: SupportsWrite[str]) -> None: ...
+    def write_pkg_file(self, file: Writer[str]) -> None: ...
     def get_name(self) -> str: ...
     def get_version(self) -> str: ...
     def get_fullname(self) -> str: ...
diff --git a/stdlib/email/generator.pyi b/stdlib/email/generator.pyi
index d30e686299fa..d555e5091212 100644
--- a/stdlib/email/generator.pyi
+++ b/stdlib/email/generator.pyi
@@ -1,8 +1,7 @@
-from _typeshed import SupportsWrite
 from email.message import Message
 from email.policy import Policy
 from typing import Any, Generic, TypeVar, overload
-from typing_extensions import Self
+from typing_extensions import Self, Writer
 
 __all__ = ["Generator", "DecodedGenerator", "BytesGenerator"]
 
@@ -15,7 +14,7 @@ class Generator(Generic[_MessageT]):
     @overload
     def __init__(
         self: Generator[Any],  # The Policy of the message is used.
-        outfp: SupportsWrite[str],
+        outfp: Writer[str],
         mangle_from_: bool | None = None,
         maxheaderlen: int | None = None,
         *,
@@ -23,22 +22,17 @@ class Generator(Generic[_MessageT]):
     ) -> None: ...
     @overload
     def __init__(
-        self,
-        outfp: SupportsWrite[str],
-        mangle_from_: bool | None = None,
-        maxheaderlen: int | None = None,
-        *,
-        policy: Policy[_MessageT],
+        self, outfp: Writer[str], mangle_from_: bool | None = None, maxheaderlen: int | None = None, *, policy: Policy[_MessageT]
     ) -> None: ...
     def write(self, s: str) -> None: ...
     def flatten(self, msg: _MessageT, unixfrom: bool = False, linesep: str | None = None) -> None: ...
-    def clone(self, fp: SupportsWrite[str]) -> Self: ...
+    def clone(self, fp: Writer[str]) -> Self: ...
 
 class BytesGenerator(Generator[_MessageT]):
     @overload
     def __init__(
         self: BytesGenerator[Any],  # The Policy of the message is used.
-        outfp: SupportsWrite[bytes],
+        outfp: Writer[bytes],
         mangle_from_: bool | None = None,
         maxheaderlen: int | None = None,
         *,
@@ -47,7 +41,7 @@ class BytesGenerator(Generator[_MessageT]):
     @overload
     def __init__(
         self,
-        outfp: SupportsWrite[bytes],
+        outfp: Writer[bytes],
         mangle_from_: bool | None = None,
         maxheaderlen: int | None = None,
         *,
@@ -58,7 +52,7 @@ class DecodedGenerator(Generator[_MessageT]):
     @overload
     def __init__(
         self: DecodedGenerator[Any],  # The Policy of the message is used.
-        outfp: SupportsWrite[str],
+        outfp: Writer[str],
         mangle_from_: bool | None = None,
         maxheaderlen: int | None = None,
         fmt: str | None = None,
@@ -68,7 +62,7 @@ class DecodedGenerator(Generator[_MessageT]):
     @overload
     def __init__(
         self,
-        outfp: SupportsWrite[str],
+        outfp: Writer[str],
         mangle_from_: bool | None = None,
         maxheaderlen: int | None = None,
         fmt: str | None = None,
diff --git a/stdlib/email/iterators.pyi b/stdlib/email/iterators.pyi
index d964d6843833..d389d937cf0e 100644
--- a/stdlib/email/iterators.pyi
+++ b/stdlib/email/iterators.pyi
@@ -1,6 +1,6 @@
-from _typeshed import SupportsWrite
 from collections.abc import Iterator
 from email.message import Message
+from typing_extensions import Writer
 
 __all__ = ["body_line_iterator", "typed_subpart_iterator", "walk"]
 
@@ -9,4 +9,4 @@ def typed_subpart_iterator(msg: Message, maintype: str = "text", subtype: str |
 def walk(self: Message) -> Iterator[Message]: ...
 
 # We include the seemingly private function because it is documented in the stdlib documentation.
-def _structure(msg: Message, fp: SupportsWrite[str] | None = None, level: int = 0, include_default: bool = False) -> None: ...
+def _structure(msg: Message, fp: Writer[str] | None = None, level: int = 0, include_default: bool = False) -> None: ...
diff --git a/stdlib/email/parser.pyi b/stdlib/email/parser.pyi
index a4924a6cbd88..91f2a8bc52fd 100644
--- a/stdlib/email/parser.pyi
+++ b/stdlib/email/parser.pyi
@@ -1,4 +1,3 @@
-from _typeshed import SupportsRead
 from collections.abc import Callable
 from email._policybase import _MessageT
 from email.feedparser import BytesFeedParser as BytesFeedParser, FeedParser as FeedParser
@@ -6,6 +5,7 @@ from email.message import Message
 from email.policy import Policy
 from io import _WrappedBuffer
 from typing import Generic, overload
+from typing_extensions import Reader
 
 __all__ = ["Parser", "HeaderParser", "BytesParser", "BytesHeaderParser", "FeedParser", "BytesFeedParser"]
 
@@ -16,11 +16,11 @@ class Parser(Generic[_MessageT]):
     def __init__(self, _class: None = None, *, policy: Policy[_MessageT]) -> None: ...
     @overload
     def __init__(self, _class: Callable[[], _MessageT] | None, *, policy: Policy[_MessageT] = ...) -> None: ...
-    def parse(self, fp: SupportsRead[str], headersonly: bool = False) -> _MessageT: ...
+    def parse(self, fp: Reader[str], headersonly: bool = False) -> _MessageT: ...
     def parsestr(self, text: str, headersonly: bool = False) -> _MessageT: ...
 
 class HeaderParser(Parser[_MessageT]):
-    def parse(self, fp: SupportsRead[str], headersonly: bool = True) -> _MessageT: ...
+    def parse(self, fp: Reader[str], headersonly: bool = True) -> _MessageT: ...
     def parsestr(self, text: str, headersonly: bool = True) -> _MessageT: ...
 
 class BytesParser(Generic[_MessageT]):
diff --git a/stdlib/encodings/rot_13.pyi b/stdlib/encodings/rot_13.pyi
index 8d71bc957594..7f33d22a959b 100644
--- a/stdlib/encodings/rot_13.pyi
+++ b/stdlib/encodings/rot_13.pyi
@@ -1,5 +1,5 @@
 import codecs
-from _typeshed import SupportsRead, SupportsWrite
+from typing_extensions import Reader, Writer
 
 # This codec is string to string.
 
@@ -20,4 +20,4 @@ def getregentry() -> codecs.CodecInfo: ...
 
 rot13_map: dict[int, int]
 
-def rot13(infile: SupportsRead[str], outfile: SupportsWrite[str]) -> None: ...
+def rot13(infile: Reader[str], outfile: Writer[str]) -> None: ...
diff --git a/stdlib/ftplib.pyi b/stdlib/ftplib.pyi
index 44bc2165fe0e..ec5ca71f6430 100644
--- a/stdlib/ftplib.pyi
+++ b/stdlib/ftplib.pyi
@@ -1,11 +1,11 @@
 import sys
-from _typeshed import SupportsRead, SupportsReadline
+from _typeshed import SupportsReadline
 from collections.abc import Callable, Iterable, Iterator
 from socket import socket
 from ssl import SSLContext
 from types import TracebackType
 from typing import Any, Final, Literal, TextIO
-from typing_extensions import Self
+from typing_extensions import Reader, Self
 
 __all__ = ["FTP", "error_reply", "error_temp", "error_perm", "error_proto", "all_errors", "FTP_TLS"]
 
@@ -83,7 +83,7 @@ class FTP:
     def storbinary(
         self,
         cmd: str,
-        fp: SupportsRead[bytes],
+        fp: Reader[bytes],
         blocksize: int = 8192,
         callback: Callable[[bytes], object] | None = None,
         rest: int | str | None = None,
diff --git a/stdlib/http/client.pyi b/stdlib/http/client.pyi
index 5c35dff28d43..7c719ab3cfa7 100644
--- a/stdlib/http/client.pyi
+++ b/stdlib/http/client.pyi
@@ -3,12 +3,12 @@ import io
 import ssl
 import sys
 import types
-from _typeshed import MaybeNone, ReadableBuffer, SupportsRead, SupportsReadline, WriteableBuffer
+from _typeshed import MaybeNone, ReadableBuffer, SupportsReadline, WriteableBuffer
 from collections.abc import Callable, Iterable, Iterator, Mapping
 from email._policybase import _MessageT
 from socket import socket
 from typing import BinaryIO, Literal, TypeVar, overload
-from typing_extensions import Self, TypeAlias
+from typing_extensions import Reader, Self, TypeAlias
 
 __all__ = [
     "HTTPResponse",
@@ -32,7 +32,7 @@ __all__ = [
     "HTTPSConnection",
 ]
 
-_DataType: TypeAlias = SupportsRead[bytes] | Iterable[ReadableBuffer] | ReadableBuffer
+_DataType: TypeAlias = Reader[bytes] | Iterable[ReadableBuffer] | ReadableBuffer
 _T = TypeVar("_T")
 _HeaderValue: TypeAlias = ReadableBuffer | str | int
 
diff --git a/stdlib/http/server.pyi b/stdlib/http/server.pyi
index 429bb65bb0ef..3fee4f83551a 100644
--- a/stdlib/http/server.pyi
+++ b/stdlib/http/server.pyi
@@ -4,11 +4,11 @@ import io
 import socketserver
 import sys
 from _ssl import _PasswordType
-from _typeshed import ReadableBuffer, StrOrBytesPath, StrPath, SupportsRead, SupportsWrite
+from _typeshed import ReadableBuffer, StrOrBytesPath, StrPath
 from collections.abc import Callable, Iterable, Mapping, Sequence
 from ssl import Purpose, SSLContext
 from typing import Any, AnyStr, BinaryIO, ClassVar, Protocol, type_check_only
-from typing_extensions import Self, deprecated
+from typing_extensions import Reader, Self, Writer, deprecated
 
 if sys.version_info >= (3, 14):
     __all__ = [
@@ -115,7 +115,7 @@ class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):
     def send_head(self) -> io.BytesIO | BinaryIO | None: ...  # undocumented
     def list_directory(self, path: StrPath) -> io.BytesIO | None: ...  # undocumented
     def translate_path(self, path: str) -> str: ...  # undocumented
-    def copyfile(self, source: SupportsRead[AnyStr], outputfile: SupportsWrite[AnyStr]) -> None: ...  # undocumented
+    def copyfile(self, source: Reader[AnyStr], outputfile: Writer[AnyStr]) -> None: ...  # undocumented
     def guess_type(self, path: StrPath) -> str: ...  # undocumented
 
 def executable(path: StrPath) -> bool: ...  # undocumented
diff --git a/stdlib/json/__init__.pyi b/stdlib/json/__init__.pyi
index 63e9718ee151..08b62c60bd6a 100644
--- a/stdlib/json/__init__.pyi
+++ b/stdlib/json/__init__.pyi
@@ -1,6 +1,6 @@
-from _typeshed import SupportsRead, SupportsWrite
 from collections.abc import Callable
 from typing import Any
+from typing_extensions import Reader, Writer
 
 from .decoder import JSONDecodeError as JSONDecodeError, JSONDecoder as JSONDecoder
 from .encoder import JSONEncoder as JSONEncoder
@@ -23,7 +23,7 @@ def dumps(
 ) -> str: ...
 def dump(
     obj: Any,
-    fp: SupportsWrite[str],
+    fp: Writer[str],
     *,
     skipkeys: bool = False,
     ensure_ascii: bool = True,
@@ -48,7 +48,7 @@ def loads(
     **kwds: Any,
 ) -> Any: ...
 def load(
-    fp: SupportsRead[str | bytes],
+    fp: Reader[str | bytes],
     *,
     cls: type[JSONDecoder] | None = None,
     object_hook: Callable[[dict[Any, Any]], Any] | None = None,
diff --git a/stdlib/logging/__init__.pyi b/stdlib/logging/__init__.pyi
index 24529bd48d6a..e71995677bcd 100644
--- a/stdlib/logging/__init__.pyi
+++ b/stdlib/logging/__init__.pyi
@@ -1,6 +1,6 @@
 import sys
 import threading
-from _typeshed import StrPath, SupportsWrite
+from _typeshed import StrPath
 from collections.abc import Callable, Iterable, Mapping, MutableMapping, Sequence
 from io import TextIOWrapper
 from re import Pattern
@@ -8,7 +8,7 @@ from string import Template
 from time import struct_time
 from types import FrameType, GenericAlias, TracebackType
 from typing import Any, ClassVar, Final, Generic, Literal, Protocol, TextIO, TypeVar, overload
-from typing_extensions import Self, TypeAlias, deprecated
+from typing_extensions import Self, TypeAlias, Writer, deprecated
 
 __all__ = [
     "BASIC_FORMAT",
@@ -582,7 +582,7 @@ def basicConfig(
     datefmt: str | None = ...,
     style: _FormatStyle = ...,
     level: _Level | None = ...,
-    stream: SupportsWrite[str] | None = ...,
+    stream: Writer[str] | None = ...,
     handlers: Iterable[Handler] | None = ...,
     force: bool | None = ...,
     encoding: str | None = ...,
@@ -595,7 +595,7 @@ def setLogRecordFactory(factory: Callable[..., LogRecord]) -> None: ...
 
 lastResort: Handler | None
 
-_StreamT = TypeVar("_StreamT", bound=SupportsWrite[str])
+_StreamT = TypeVar("_StreamT", bound=Writer[str])
 
 class StreamHandler(Handler, Generic[_StreamT]):
     stream: _StreamT  # undocumented
diff --git a/stdlib/mailbox.pyi b/stdlib/mailbox.pyi
index ff605c0661fb..6a03a6cd80b7 100644
--- a/stdlib/mailbox.pyi
+++ b/stdlib/mailbox.pyi
@@ -1,13 +1,13 @@
 import email.message
 import io
 import sys
-from _typeshed import StrPath, SupportsNoArgReadline, SupportsRead
+from _typeshed import StrPath, SupportsNoArgReadline
 from abc import ABCMeta, abstractmethod
 from collections.abc import Callable, Iterable, Iterator, Mapping, Sequence
 from email._policybase import _MessageT
 from types import GenericAlias, TracebackType
 from typing import IO, Any, AnyStr, Generic, Literal, Protocol, TypeVar, overload
-from typing_extensions import Self, TypeAlias
+from typing_extensions import Reader, Self, TypeAlias
 
 __all__ = [
     "Mailbox",
@@ -31,7 +31,7 @@ __all__ = [
 
 _T = TypeVar("_T")
 
-class _SupportsReadAndReadline(SupportsRead[bytes], SupportsNoArgReadline[bytes], Protocol): ...
+class _SupportsReadAndReadline(Reader[bytes], SupportsNoArgReadline[bytes], Protocol): ...
 
 _MessageData: TypeAlias = email.message.Message | bytes | str | io.StringIO | _SupportsReadAndReadline
 
diff --git a/stdlib/marshal.pyi b/stdlib/marshal.pyi
index 46c421e4ce30..b04a14a1a77a 100644
--- a/stdlib/marshal.pyi
+++ b/stdlib/marshal.pyi
@@ -1,9 +1,9 @@
 import builtins
 import sys
 import types
-from _typeshed import ReadableBuffer, SupportsRead, SupportsWrite
+from _typeshed import ReadableBuffer
 from typing import Any, Final
-from typing_extensions import TypeAlias
+from typing_extensions import Reader, TypeAlias, Writer
 
 version: Final[int]
 
@@ -29,21 +29,21 @@ _Marshallable: TypeAlias = (
 )
 
 if sys.version_info >= (3, 14):
-    def dump(value: _Marshallable, file: SupportsWrite[bytes], version: int = 5, /, *, allow_code: bool = True) -> None: ...
+    def dump(value: _Marshallable, file: Writer[bytes], version: int = 5, /, *, allow_code: bool = True) -> None: ...
     def dumps(value: _Marshallable, version: int = 5, /, *, allow_code: bool = True) -> bytes: ...
 
 elif sys.version_info >= (3, 13):
-    def dump(value: _Marshallable, file: SupportsWrite[bytes], version: int = 4, /, *, allow_code: bool = True) -> None: ...
+    def dump(value: _Marshallable, file: Writer[bytes], version: int = 4, /, *, allow_code: bool = True) -> None: ...
     def dumps(value: _Marshallable, version: int = 4, /, *, allow_code: bool = True) -> bytes: ...
 
 else:
-    def dump(value: _Marshallable, file: SupportsWrite[bytes], version: int = 4, /) -> None: ...
+    def dump(value: _Marshallable, file: Writer[bytes], version: int = 4, /) -> None: ...
     def dumps(value: _Marshallable, version: int = 4, /) -> bytes: ...
 
 if sys.version_info >= (3, 13):
-    def load(file: SupportsRead[bytes], /, *, allow_code: bool = True) -> Any: ...
+    def load(file: Reader[bytes], /, *, allow_code: bool = True) -> Any: ...
     def loads(bytes: ReadableBuffer, /, *, allow_code: bool = True) -> Any: ...
 
 else:
-    def load(file: SupportsRead[bytes], /) -> Any: ...
+    def load(file: Reader[bytes], /) -> Any: ...
     def loads(bytes: ReadableBuffer, /) -> Any: ...
diff --git a/stdlib/multiprocessing/reduction.pyi b/stdlib/multiprocessing/reduction.pyi
index 490ae195c20e..c132103c52df 100644
--- a/stdlib/multiprocessing/reduction.pyi
+++ b/stdlib/multiprocessing/reduction.pyi
@@ -1,7 +1,7 @@
 import pickle
 import sys
 from _pickle import _ReducedType
-from _typeshed import HasFileno, SupportsWrite, Unused
+from _typeshed import HasFileno, Unused
 from abc import ABCMeta
 from builtins import type as Type  # alias to avoid name clash
 from collections.abc import Callable
@@ -9,6 +9,7 @@ from copyreg import _DispatchTableType
 from multiprocessing import connection
 from socket import socket
 from typing import Any, Final
+from typing_extensions import Writer
 
 if sys.platform == "win32":
     __all__ = ["send_handle", "recv_handle", "ForkingPickler", "register", "dump", "DupHandle", "duplicate", "steal_handle"]
@@ -19,7 +20,7 @@ HAVE_SEND_HANDLE: Final[bool]
 
 class ForkingPickler(pickle.Pickler):
     dispatch_table: _DispatchTableType
-    def __init__(self, file: SupportsWrite[bytes], protocol: int | None = ...) -> None: ...
+    def __init__(self, file: Writer[bytes], protocol: int | None = ...) -> None: ...
     @classmethod
     def register(cls, type: Type, reduce: Callable[[Any], _ReducedType]) -> None: ...
     @classmethod
@@ -28,7 +29,7 @@ class ForkingPickler(pickle.Pickler):
 
 register = ForkingPickler.register
 
-def dump(obj: Any, file: SupportsWrite[bytes], protocol: int | None = None) -> None: ...
+def dump(obj: Any, file: Writer[bytes], protocol: int | None = None) -> None: ...
 
 if sys.platform == "win32":
     def duplicate(
diff --git a/stdlib/optparse.pyi b/stdlib/optparse.pyi
index 8b7fcd82e5a5..e1c21add697e 100644
--- a/stdlib/optparse.pyi
+++ b/stdlib/optparse.pyi
@@ -1,9 +1,9 @@
 import builtins
-from _typeshed import MaybeNone, SupportsWrite
+from _typeshed import MaybeNone
 from abc import abstractmethod
 from collections.abc import Callable, Iterable, Mapping, Sequence
 from typing import Any, ClassVar, Final, Literal, NoReturn, overload
-from typing_extensions import Self
+from typing_extensions import Self, Writer
 
 __all__ = [
     "Option",
@@ -300,9 +300,9 @@ class OptionParser(OptionContainer):
     def get_usage(self) -> str: ...
     def get_version(self) -> str: ...
     def parse_args(self, args: list[str] | None = None, values: Values | None = None) -> tuple[Values, list[str]]: ...
-    def print_usage(self, file: SupportsWrite[str] | None = None) -> None: ...
-    def print_help(self, file: SupportsWrite[str] | None = None) -> None: ...
-    def print_version(self, file: SupportsWrite[str] | None = None) -> None: ...
+    def print_usage(self, file: Writer[str] | None = None) -> None: ...
+    def print_help(self, file: Writer[str] | None = None) -> None: ...
+    def print_version(self, file: Writer[str] | None = None) -> None: ...
     def set_default(self, dest: str, value: Any) -> None: ...  # default value can be "any" type
     def set_defaults(self, **kwargs: Any) -> None: ...  # default values can be "any" type
     def set_process_default_values(self, process: bool) -> None: ...
diff --git a/stdlib/pickle.pyi b/stdlib/pickle.pyi
index 2d80d61645e0..f4809bbdeddf 100644
--- a/stdlib/pickle.pyi
+++ b/stdlib/pickle.pyi
@@ -12,10 +12,10 @@ from _pickle import (
     load as load,
     loads as loads,
 )
-from _typeshed import ReadableBuffer, SupportsWrite
+from _typeshed import ReadableBuffer
 from collections.abc import Callable, Iterable, Mapping
 from typing import Any, ClassVar, SupportsBytes, SupportsIndex, final
-from typing_extensions import Self
+from typing_extensions import Self, Writer
 
 __all__ = [
     "PickleBuffer",
@@ -207,7 +207,7 @@ class _Pickler:
     reducer_override: Callable[[Any], Any]
     def __init__(
         self,
-        file: SupportsWrite[bytes],
+        file: Writer[bytes],
         protocol: int | None = None,
         *,
         fix_imports: bool = True,
diff --git a/stdlib/pkgutil.pyi b/stdlib/pkgutil.pyi
index e764d08e79f8..b36d3cc195f6 100644
--- a/stdlib/pkgutil.pyi
+++ b/stdlib/pkgutil.pyi
@@ -1,9 +1,9 @@
 import sys
-from _typeshed import StrOrBytesPath, SupportsRead
+from _typeshed import StrOrBytesPath
 from _typeshed.importlib import LoaderProtocol, MetaPathFinderProtocol, PathEntryFinderProtocol
 from collections.abc import Callable, Iterable, Iterator
 from typing import IO, Any, NamedTuple, TypeVar
-from typing_extensions import deprecated
+from typing_extensions import Reader, deprecated
 
 __all__ = [
     "get_importer",
@@ -45,7 +45,7 @@ if sys.version_info < (3, 14):
 def get_importer(path_item: StrOrBytesPath) -> PathEntryFinderProtocol | None: ...
 def iter_importers(fullname: str = "") -> Iterator[MetaPathFinderProtocol | PathEntryFinderProtocol]: ...
 def iter_modules(path: Iterable[StrOrBytesPath] | None = None, prefix: str = "") -> Iterator[ModuleInfo]: ...
-def read_code(stream: SupportsRead[bytes]) -> Any: ...  # undocumented
+def read_code(stream: Reader[bytes]) -> Any: ...  # undocumented
 def walk_packages(
     path: Iterable[StrOrBytesPath] | None = None, prefix: str = "", onerror: Callable[[str], object] | None = None
 ) -> Iterator[ModuleInfo]: ...
diff --git a/stdlib/pydoc.pyi b/stdlib/pydoc.pyi
index f14b9d1bb699..c6ffe5baa1d6 100644
--- a/stdlib/pydoc.pyi
+++ b/stdlib/pydoc.pyi
@@ -1,12 +1,12 @@
 import sys
-from _typeshed import OptExcInfo, SupportsWrite, Unused
+from _typeshed import OptExcInfo, Unused
 from abc import abstractmethod
 from builtins import list as _list  # "list" conflicts with method name
 from collections.abc import Callable, Container, Mapping, MutableMapping
 from reprlib import Repr
 from types import MethodType, ModuleType, TracebackType
 from typing import IO, Any, AnyStr, Final, NoReturn, Protocol, TypeVar
-from typing_extensions import TypeGuard, deprecated
+from typing_extensions import TypeGuard, Writer, deprecated
 
 __all__ = ["help"]
 
@@ -282,7 +282,7 @@ if sys.version_info >= (3, 11):
         thing: str | object,
         title: str = "Python Library Documentation: %s",
         forceload: bool = ...,
-        output: SupportsWrite[str] | None = None,
+        output: Writer[str] | None = None,
         is_cli: bool = False,
     ) -> None: ...
 
@@ -291,7 +291,7 @@ else:
         thing: str | object,
         title: str = "Python Library Documentation: %s",
         forceload: bool = ...,
-        output: SupportsWrite[str] | None = None,
+        output: Writer[str] | None = None,
     ) -> None: ...
 
 def writedoc(thing: str | object, forceload: bool = ...) -> None: ...
diff --git a/stdlib/pyexpat/__init__.pyi b/stdlib/pyexpat/__init__.pyi
index 21e676052098..1f5031b335db 100644
--- a/stdlib/pyexpat/__init__.pyi
+++ b/stdlib/pyexpat/__init__.pyi
@@ -1,8 +1,8 @@
-from _typeshed import ReadableBuffer, SupportsRead
+from _typeshed import ReadableBuffer
 from collections.abc import Callable
 from pyexpat import errors as errors, model as model
 from typing import Any, Final, final
-from typing_extensions import CapsuleType, TypeAlias
+from typing_extensions import CapsuleType, Reader, TypeAlias
 from xml.parsers.expat import ExpatError as ExpatError
 
 EXPAT_VERSION: Final[str]  # undocumented
@@ -20,7 +20,7 @@ _Model: TypeAlias = tuple[int, int, str | None, tuple[Any, ...]]
 @final
 class XMLParserType:
     def Parse(self, data: str | ReadableBuffer, isfinal: bool = False, /) -> int: ...
-    def ParseFile(self, file: SupportsRead[bytes], /) -> int: ...
+    def ParseFile(self, file: Reader[bytes], /) -> int: ...
     def SetBase(self, base: str, /) -> None: ...
     def GetBase(self) -> str | None: ...
     def GetInputContext(self) -> bytes | None: ...
diff --git a/stdlib/quopri.pyi b/stdlib/quopri.pyi
index b652e139bd0e..657cd57b208a 100644
--- a/stdlib/quopri.pyi
+++ b/stdlib/quopri.pyi
@@ -1,11 +1,12 @@
-from _typeshed import ReadableBuffer, SupportsNoArgReadline, SupportsRead, SupportsWrite
+from _typeshed import ReadableBuffer, SupportsNoArgReadline
 from typing import Protocol
+from typing_extensions import Reader, Writer
 
 __all__ = ["encode", "decode", "encodestring", "decodestring"]
 
-class _Input(SupportsRead[bytes], SupportsNoArgReadline[bytes], Protocol): ...
+class _Input(Reader[bytes], SupportsNoArgReadline[bytes], Protocol): ...
 
-def encode(input: _Input, output: SupportsWrite[bytes], quotetabs: int, header: bool = False) -> None: ...
+def encode(input: _Input, output: Writer[bytes], quotetabs: int, header: bool = False) -> None: ...
 def encodestring(s: ReadableBuffer, quotetabs: bool = False, header: bool = False) -> bytes: ...
-def decode(input: _Input, output: SupportsWrite[bytes], header: bool = False) -> None: ...
+def decode(input: _Input, output: Writer[bytes], header: bool = False) -> None: ...
 def decodestring(s: str | ReadableBuffer, header: bool = False) -> bytes: ...
diff --git a/stdlib/shutil.pyi b/stdlib/shutil.pyi
index c66d8fa128be..0b22236219cd 100644
--- a/stdlib/shutil.pyi
+++ b/stdlib/shutil.pyi
@@ -1,10 +1,10 @@
 import os
 import sys
-from _typeshed import BytesPath, ExcInfo, FileDescriptorOrPath, MaybeNone, StrOrBytesPath, StrPath, SupportsRead, SupportsWrite
+from _typeshed import BytesPath, ExcInfo, FileDescriptorOrPath, MaybeNone, StrOrBytesPath, StrPath
 from collections.abc import Callable, Iterable, Sequence
 from tarfile import _TarfileFilter
 from typing import Any, AnyStr, NamedTuple, NoReturn, Protocol, TypeVar, overload
-from typing_extensions import TypeAlias, deprecated
+from typing_extensions import Reader, TypeAlias, Writer, deprecated
 
 __all__ = [
     "copyfileobj",
@@ -53,7 +53,7 @@ else:
 class ReadError(OSError): ...
 class RegistryError(Exception): ...
 
-def copyfileobj(fsrc: SupportsRead[AnyStr], fdst: SupportsWrite[AnyStr], length: int = 0) -> None: ...
+def copyfileobj(fsrc: Reader[AnyStr], fdst: Writer[AnyStr], length: int = 0) -> None: ...
 def copyfile(src: StrOrBytesPath, dst: _StrOrBytesPathT, *, follow_symlinks: bool = True) -> _StrOrBytesPathT: ...
 def copymode(src: StrOrBytesPath, dst: StrOrBytesPath, *, follow_symlinks: bool = True) -> None: ...
 def copystat(src: StrOrBytesPath, dst: StrOrBytesPath, *, follow_symlinks: bool = True) -> None: ...
diff --git a/stdlib/tarfile.pyi b/stdlib/tarfile.pyi
index 31094f87872d..1c172f963d5a 100644
--- a/stdlib/tarfile.pyi
+++ b/stdlib/tarfile.pyi
@@ -1,13 +1,13 @@
 import bz2
 import io
 import sys
-from _typeshed import ReadableBuffer, StrOrBytesPath, StrPath, SupportsRead, WriteableBuffer
+from _typeshed import ReadableBuffer, StrOrBytesPath, StrPath, WriteableBuffer
 from builtins import list as _list  # aliases to avoid name clashes with fields named "type" or "list"
 from collections.abc import Callable, Iterable, Iterator, Mapping
 from gzip import _ReadableFileobj as _GzipReadableFileobj, _WritableFileobj as _GzipWritableFileobj
 from types import TracebackType
 from typing import IO, ClassVar, Literal, Protocol, overload
-from typing_extensions import Self, TypeAlias, deprecated
+from typing_extensions import Reader, Self, TypeAlias, deprecated
 
 __all__ = [
     "TarFile",
@@ -570,7 +570,7 @@ class TarFile:
         *,
         filter: Callable[[TarInfo], TarInfo | None] | None = None,
     ) -> None: ...
-    def addfile(self, tarinfo: TarInfo, fileobj: SupportsRead[bytes] | None = None) -> None: ...
+    def addfile(self, tarinfo: TarInfo, fileobj: Reader[bytes] | None = None) -> None: ...
     def gettarinfo(
         self, name: StrOrBytesPath | None = None, arcname: str | None = None, fileobj: IO[bytes] | None = None
     ) -> TarInfo: ...
diff --git a/stdlib/tomllib.pyi b/stdlib/tomllib.pyi
index c160ffc38bfd..3238cecb5fc7 100644
--- a/stdlib/tomllib.pyi
+++ b/stdlib/tomllib.pyi
@@ -1,8 +1,7 @@
 import sys
-from _typeshed import SupportsRead
 from collections.abc import Callable
 from typing import Any, overload
-from typing_extensions import deprecated
+from typing_extensions import Reader, deprecated
 
 __all__ = ("loads", "load", "TOMLDecodeError")
 
@@ -22,5 +21,5 @@ if sys.version_info >= (3, 14):
 else:
     class TOMLDecodeError(ValueError): ...
 
-def load(fp: SupportsRead[bytes], /, *, parse_float: Callable[[str], Any] = ...) -> dict[str, Any]: ...
+def load(fp: Reader[bytes], /, *, parse_float: Callable[[str], Any] = ...) -> dict[str, Any]: ...
 def loads(s: str, /, *, parse_float: Callable[[str], Any] = ...) -> dict[str, Any]: ...
diff --git a/stdlib/traceback.pyi b/stdlib/traceback.pyi
index 4553dbd08384..04e982c83d28 100644
--- a/stdlib/traceback.pyi
+++ b/stdlib/traceback.pyi
@@ -1,9 +1,9 @@
 import sys
-from _typeshed import SupportsWrite, Unused
+from _typeshed import Unused
 from collections.abc import Generator, Iterable, Iterator, Mapping
 from types import FrameType, TracebackType
 from typing import Any, ClassVar, Literal, overload
-from typing_extensions import Self, TypeAlias, deprecated
+from typing_extensions import Self, TypeAlias, Writer, deprecated
 
 __all__ = [
     "extract_stack",
@@ -32,7 +32,7 @@ if sys.version_info >= (3, 14):
 
 _FrameSummaryTuple: TypeAlias = tuple[str, int, str, str | None]
 
-def print_tb(tb: TracebackType | None, limit: int | None = None, file: SupportsWrite[str] | None = None) -> None: ...
+def print_tb(tb: TracebackType | None, limit: int | None = None, file: Writer[str] | None = None) -> None: ...
 
 if sys.version_info >= (3, 10):
     @overload
@@ -42,12 +42,12 @@ if sys.version_info >= (3, 10):
         value: BaseException | None = ...,
         tb: TracebackType | None = ...,
         limit: int | None = None,
-        file: SupportsWrite[str] | None = None,
+        file: Writer[str] | None = None,
         chain: bool = True,
     ) -> None: ...
     @overload
     def print_exception(
-        exc: BaseException, /, *, limit: int | None = None, file: SupportsWrite[str] | None = None, chain: bool = True
+        exc: BaseException, /, *, limit: int | None = None, file: Writer[str] | None = None, chain: bool = True
     ) -> None: ...
     @overload
     def format_exception(
@@ -67,7 +67,7 @@ else:
         value: BaseException | None,
         tb: TracebackType | None,
         limit: int | None = None,
-        file: SupportsWrite[str] | None = None,
+        file: Writer[str] | None = None,
         chain: bool = True,
     ) -> None: ...
     def format_exception(
@@ -78,13 +78,13 @@ else:
         chain: bool = True,
     ) -> list[str]: ...
 
-def print_exc(limit: int | None = None, file: SupportsWrite[str] | None = None, chain: bool = True) -> None: ...
-def print_last(limit: int | None = None, file: SupportsWrite[str] | None = None, chain: bool = True) -> None: ...
-def print_stack(f: FrameType | None = None, limit: int | None = None, file: SupportsWrite[str] | None = None) -> None: ...
+def print_exc(limit: int | None = None, file: Writer[str] | None = None, chain: bool = True) -> None: ...
+def print_last(limit: int | None = None, file: Writer[str] | None = None, chain: bool = True) -> None: ...
+def print_stack(f: FrameType | None = None, limit: int | None = None, file: Writer[str] | None = None) -> None: ...
 def extract_tb(tb: TracebackType | None, limit: int | None = None) -> StackSummary: ...
 def extract_stack(f: FrameType | None = None, limit: int | None = None) -> StackSummary: ...
 def format_list(extracted_list: Iterable[FrameSummary | _FrameSummaryTuple]) -> list[str]: ...
-def print_list(extracted_list: Iterable[FrameSummary | _FrameSummaryTuple], file: SupportsWrite[str] | None = None) -> None: ...
+def print_list(extracted_list: Iterable[FrameSummary | _FrameSummaryTuple], file: Writer[str] | None = None) -> None: ...
 
 if sys.version_info >= (3, 13):
     @overload
@@ -242,7 +242,7 @@ class TracebackException:
         def format_exception_only(self) -> Generator[str, None, None]: ...
 
     if sys.version_info >= (3, 11):
-        def print(self, *, file: SupportsWrite[str] | None = None, chain: bool = True) -> None: ...
+        def print(self, *, file: Writer[str] | None = None, chain: bool = True) -> None: ...
 
 class FrameSummary:
     if sys.version_info >= (3, 11):
diff --git a/stdlib/unittest/runner.pyi b/stdlib/unittest/runner.pyi
index 783764464a53..9911b6876375 100644
--- a/stdlib/unittest/runner.pyi
+++ b/stdlib/unittest/runner.pyi
@@ -2,15 +2,15 @@ import sys
 import unittest.case
 import unittest.result
 import unittest.suite
-from _typeshed import SupportsFlush, SupportsWrite
+from _typeshed import SupportsFlush
 from collections.abc import Callable, Iterable
 from typing import Any, Generic, Protocol, TypeVar
-from typing_extensions import Never, TypeAlias
+from typing_extensions import Never, TypeAlias, Writer
 from warnings import _ActionKind
 
 _ResultClassType: TypeAlias = Callable[[_TextTestStream, bool, int], TextTestResult[Any]]
 
-class _SupportsWriteAndFlush(SupportsWrite[str], SupportsFlush, Protocol): ...
+class _SupportsWriteAndFlush(Writer[str], SupportsFlush, Protocol): ...
 
 # All methods used by unittest.runner.TextTestResult's stream
 class _TextTestStream(_SupportsWriteAndFlush, Protocol):
@@ -28,7 +28,7 @@ class _WritelnDecorator:
     __getstate__: Never
     # Methods proxied from the wrapped stream object via __getattr__
     def flush(self) -> object: ...
-    def write(self, s: str, /) -> object: ...
+    def write(self, s: str, /) -> int: ...
 
 _StreamT = TypeVar("_StreamT", bound=_TextTestStream, default=_WritelnDecorator)
 
diff --git a/stdlib/urllib/request.pyi b/stdlib/urllib/request.pyi
index d8fc5e0d8f48..dcba9fc9ba8f 100644
--- a/stdlib/urllib/request.pyi
+++ b/stdlib/urllib/request.pyi
@@ -1,13 +1,13 @@
 import ssl
 import sys
-from _typeshed import ReadableBuffer, StrOrBytesPath, SupportsRead
+from _typeshed import ReadableBuffer, StrOrBytesPath
 from collections.abc import Callable, Iterable, Mapping, MutableMapping, Sequence
 from email.message import Message
 from http.client import HTTPConnection, HTTPMessage, HTTPResponse
 from http.cookiejar import CookieJar
 from re import Pattern
 from typing import IO, Any, ClassVar, NoReturn, Protocol, TypeVar, overload
-from typing_extensions import TypeAlias, deprecated
+from typing_extensions import Reader, TypeAlias, deprecated
 from urllib.error import HTTPError as HTTPError
 from urllib.response import addclosehook, addinfourl
 
@@ -50,7 +50,7 @@ if sys.version_info < (3, 14):
 
 _T = TypeVar("_T")
 _UrlopenRet: TypeAlias = Any
-_DataType: TypeAlias = ReadableBuffer | SupportsRead[bytes] | Iterable[bytes] | None
+_DataType: TypeAlias = ReadableBuffer | Reader[bytes] | Iterable[bytes] | None
 
 if sys.version_info >= (3, 13):
     def urlopen(
diff --git a/stdlib/xml/dom/expatbuilder.pyi b/stdlib/xml/dom/expatbuilder.pyi
index 228ad07e15ad..c44157f0b19c 100644
--- a/stdlib/xml/dom/expatbuilder.pyi
+++ b/stdlib/xml/dom/expatbuilder.pyi
@@ -1,6 +1,6 @@
-from _typeshed import ReadableBuffer, SupportsRead
+from _typeshed import ReadableBuffer
 from typing import Any, NoReturn
-from typing_extensions import TypeAlias
+from typing_extensions import Reader, TypeAlias
 from xml.dom.minidom import Document, DocumentFragment, DOMImplementation, Element, Node, TypeInfo
 from xml.dom.xmlbuilder import DOMBuilderFilter, Options
 from xml.parsers.expat import XMLParserType
@@ -34,7 +34,7 @@ class ExpatBuilder:
     def getParser(self) -> XMLParserType: ...
     def reset(self) -> None: ...
     def install(self, parser: XMLParserType) -> None: ...
-    def parseFile(self, file: SupportsRead[ReadableBuffer | str]) -> Document: ...
+    def parseFile(self, file: Reader[ReadableBuffer | str]) -> Document: ...
     def parseString(self, string: str | ReadableBuffer) -> Document: ...
     def start_doctype_decl_handler(
         self, doctypeName: str, systemId: str | None, publicId: str | None, has_internal_subset: bool
@@ -88,7 +88,7 @@ class FragmentBuilder(ExpatBuilder):
     context: Node
     def __init__(self, context: Node, options: Options | None = None) -> None: ...
     def reset(self) -> None: ...
-    def parseFile(self, file: SupportsRead[ReadableBuffer | str]) -> DocumentFragment: ...  # type: ignore[override]
+    def parseFile(self, file: Reader[ReadableBuffer | str]) -> DocumentFragment: ...  # type: ignore[override]
     def parseString(self, string: ReadableBuffer | str) -> DocumentFragment: ...  # type: ignore[override]
     def external_entity_ref_handler(self, context: str, base: str | None, systemId: str | None, publicId: str | None) -> int: ...
 
@@ -106,7 +106,7 @@ class ParseEscape(Exception): ...
 class InternalSubsetExtractor(ExpatBuilder):
     subset: str | list[str] | None = None
     def getSubset(self) -> str: ...
-    def parseFile(self, file: SupportsRead[ReadableBuffer | str]) -> None: ...  # type: ignore[override]
+    def parseFile(self, file: Reader[ReadableBuffer | str]) -> None: ...  # type: ignore[override]
     def parseString(self, string: str | ReadableBuffer) -> None: ...  # type: ignore[override]
     def start_doctype_decl_handler(  # type: ignore[override]
         self, name: str, publicId: str | None, systemId: str | None, has_internal_subset: bool
@@ -114,8 +114,8 @@ class InternalSubsetExtractor(ExpatBuilder):
     def end_doctype_decl_handler(self) -> NoReturn: ...
     def start_element_handler(self, name: str, attrs: list[str]) -> NoReturn: ...
 
-def parse(file: str | SupportsRead[ReadableBuffer | str], namespaces: bool = True) -> Document: ...
+def parse(file: str | Reader[ReadableBuffer | str], namespaces: bool = True) -> Document: ...
 def parseString(string: str | ReadableBuffer, namespaces: bool = True) -> Document: ...
-def parseFragment(file: str | SupportsRead[ReadableBuffer | str], context: Node, namespaces: bool = True) -> DocumentFragment: ...
+def parseFragment(file: str | Reader[ReadableBuffer | str], context: Node, namespaces: bool = True) -> DocumentFragment: ...
 def parseFragmentString(string: str | ReadableBuffer, context: Node, namespaces: bool = True) -> DocumentFragment: ...
 def makeBuilder(options: Options) -> ExpatBuilderNS | ExpatBuilder: ...
diff --git a/stdlib/xml/dom/minidom.pyi b/stdlib/xml/dom/minidom.pyi
index ab2ef87e38a8..14531aa3c54f 100644
--- a/stdlib/xml/dom/minidom.pyi
+++ b/stdlib/xml/dom/minidom.pyi
@@ -1,10 +1,10 @@
 import xml.dom
 from _collections_abc import dict_keys, dict_values
-from _typeshed import Incomplete, ReadableBuffer, SupportsRead, SupportsWrite
+from _typeshed import Incomplete, ReadableBuffer
 from collections.abc import Iterable, Sequence
 from types import TracebackType
 from typing import Any, ClassVar, Generic, Literal, NoReturn, Protocol, TypeVar, overload
-from typing_extensions import Self, TypeAlias
+from typing_extensions import Reader, Self, TypeAlias, Writer
 from xml.dom.minicompat import EmptyNodeList, NodeList
 from xml.dom.xmlbuilder import DocumentLS, DOMImplementationLS
 from xml.sax.xmlreader import XMLReader
@@ -46,9 +46,7 @@ class _DOMErrorHandler(Protocol):
 class _UserDataHandler(Protocol):
     def handle(self, operation: int, key: str, data: Any, src: Node, dst: Node) -> None: ...
 
-def parse(
-    file: str | SupportsRead[ReadableBuffer | str], parser: XMLReader | None = None, bufsize: int | None = None
-) -> Document: ...
+def parse(file: str | Reader[ReadableBuffer | str], parser: XMLReader | None = None, bufsize: int | None = None) -> Document: ...
 def parseString(string: str | ReadableBuffer, parser: XMLReader | None = None) -> Document: ...
 @overload
 def getDOMImplementation(features: None = None) -> DOMImplementation: ...
@@ -311,7 +309,7 @@ class Element(Node):
     def hasAttributeNS(self, namespaceURI: str | None, localName: str) -> bool: ...
     def getElementsByTagName(self, name: str) -> NodeList[Element]: ...
     def getElementsByTagNameNS(self, namespaceURI: str | None, localName: str) -> NodeList[Element]: ...
-    def writexml(self, writer: SupportsWrite[str], indent: str = "", addindent: str = "", newl: str = "") -> None: ...
+    def writexml(self, writer: Writer[str], indent: str = "", addindent: str = "", newl: str = "") -> None: ...
     def hasAttributes(self) -> bool: ...
     def setIdAttribute(self, name: str) -> None: ...
     def setIdAttributeNS(self, namespaceURI: str | None, localName: str) -> None: ...
@@ -368,7 +366,7 @@ class ProcessingInstruction(Childless, Node):
     data: str
 
     def __init__(self, target: str, data: str) -> None: ...
-    def writexml(self, writer: SupportsWrite[str], indent: str = "", addindent: str = "", newl: str = "") -> None: ...
+    def writexml(self, writer: Writer[str], indent: str = "", addindent: str = "", newl: str = "") -> None: ...
 
 class CharacterData(Childless, Node):
     nodeValue: str
@@ -416,7 +414,7 @@ class Text(CharacterData):
 
     data: str
     def splitText(self, offset: int) -> Self: ...
-    def writexml(self, writer: SupportsWrite[str], indent: str = "", addindent: str = "", newl: str = "") -> None: ...
+    def writexml(self, writer: Writer[str], indent: str = "", addindent: str = "", newl: str = "") -> None: ...
     def replaceWholeText(self, content: str) -> Self | None: ...
     @property
     def isWhitespaceInElementContent(self) -> bool: ...
@@ -443,7 +441,7 @@ class Comment(CharacterData):
     @property
     def localName(self) -> None: ...
     def __init__(self, data: str) -> None: ...
-    def writexml(self, writer: SupportsWrite[str], indent: str = "", addindent: str = "", newl: str = "") -> None: ...
+    def writexml(self, writer: Writer[str], indent: str = "", addindent: str = "", newl: str = "") -> None: ...
 
 class CDATASection(Text):
     nodeType: ClassVar[Literal[4]]  # type: ignore[assignment]
@@ -455,7 +453,7 @@ class CDATASection(Text):
     nextSibling: _DocumentFragmentChildren | _ElementChildren | None
     previousSibling: _DocumentFragmentChildren | _ElementChildren | None
 
-    def writexml(self, writer: SupportsWrite[str], indent: str = "", addindent: str = "", newl: str = "") -> None: ...
+    def writexml(self, writer: Writer[str], indent: str = "", addindent: str = "", newl: str = "") -> None: ...
 
 class ReadOnlySequentialNamedNodeMap(Generic[_N]):
     def __init__(self, seq: Sequence[_N] = ()) -> None: ...
@@ -502,7 +500,7 @@ class DocumentType(Identified, Childless, Node):
 
     def __init__(self, qualifiedName: str | None) -> None: ...
     def cloneNode(self, deep: bool) -> DocumentType | None: ...
-    def writexml(self, writer: SupportsWrite[str], indent: str = "", addindent: str = "", newl: str = "") -> None: ...
+    def writexml(self, writer: Writer[str], indent: str = "", addindent: str = "", newl: str = "") -> None: ...
 
 class Entity(Identified, Node):
     nodeType: ClassVar[Literal[6]]
@@ -626,7 +624,7 @@ class Document(Node, DocumentLS):
     def importNode(self, node: _ImportableNodeVar, deep: bool) -> _ImportableNodeVar: ...
     def writexml(
         self,
-        writer: SupportsWrite[str],
+        writer: Writer[str],
         indent: str = "",
         addindent: str = "",
         newl: str = "",
diff --git a/stdlib/xml/dom/xmlbuilder.pyi b/stdlib/xml/dom/xmlbuilder.pyi
index 6fb18bbc4eda..711582e6780e 100644
--- a/stdlib/xml/dom/xmlbuilder.pyi
+++ b/stdlib/xml/dom/xmlbuilder.pyi
@@ -1,5 +1,5 @@
-from _typeshed import SupportsRead
 from typing import Any, Literal, NoReturn
+from typing_extensions import Reader
 from xml.dom.minidom import Document, Node, _DOMErrorHandler
 
 __all__ = ["DOMBuilder", "DOMEntityResolver", "DOMInputSource"]
@@ -47,8 +47,8 @@ class DOMEntityResolver:
     def resolveEntity(self, publicId: str | None, systemId: str) -> DOMInputSource: ...
 
 class DOMInputSource:
-    byteStream: SupportsRead[bytes] | None
-    characterStream: SupportsRead[str] | None
+    byteStream: Reader[bytes] | None
+    characterStream: Reader[str] | None
     stringData: str | None
     encoding: str | None
     publicId: str | None
diff --git a/stdlib/xml/etree/ElementTree.pyi b/stdlib/xml/etree/ElementTree.pyi
index 4c55a1a7452e..6ee1b12dd426 100644
--- a/stdlib/xml/etree/ElementTree.pyi
+++ b/stdlib/xml/etree/ElementTree.pyi
@@ -1,9 +1,9 @@
 import sys
 from _collections_abc import dict_keys
-from _typeshed import FileDescriptorOrPath, ReadableBuffer, SupportsRead, SupportsWrite
+from _typeshed import FileDescriptorOrPath, ReadableBuffer
 from collections.abc import Callable, Generator, ItemsView, Iterable, Iterator, Mapping, Sequence
 from typing import Any, Final, Generic, Literal, Protocol, SupportsIndex, TypeVar, overload, type_check_only
-from typing_extensions import TypeAlias, TypeGuard, deprecated
+from typing_extensions import Reader, TypeAlias, TypeGuard, Writer, deprecated
 from xml.parsers.expat import XMLParserType
 
 __all__ = [
@@ -36,9 +36,9 @@ __all__ = [
 ]
 
 _T = TypeVar("_T")
-_FileRead: TypeAlias = FileDescriptorOrPath | SupportsRead[bytes] | SupportsRead[str]
-_FileWriteC14N: TypeAlias = FileDescriptorOrPath | SupportsWrite[bytes]
-_FileWrite: TypeAlias = _FileWriteC14N | SupportsWrite[str]
+_FileRead: TypeAlias = FileDescriptorOrPath | Reader[bytes] | Reader[str]
+_FileWriteC14N: TypeAlias = FileDescriptorOrPath | Writer[bytes]
+_FileWrite: TypeAlias = _FileWriteC14N | Writer[str]
 
 VERSION: Final[str]
 
@@ -66,7 +66,7 @@ def canonicalize(
 def canonicalize(
     xml_data: str | ReadableBuffer | None = None,
     *,
-    out: SupportsWrite[str],
+    out: Writer[str],
     from_file: _FileRead | None = None,
     with_comments: bool = False,
     strip_text: bool = False,
diff --git a/stdlib/xml/sax/__init__.pyi b/stdlib/xml/sax/__init__.pyi
index ebe92d28c74d..de3a66406ec8 100644
--- a/stdlib/xml/sax/__init__.pyi
+++ b/stdlib/xml/sax/__init__.pyi
@@ -1,8 +1,8 @@
 import sys
-from _typeshed import ReadableBuffer, StrPath, SupportsRead, _T_co
+from _typeshed import ReadableBuffer, StrPath, _T_co
 from collections.abc import Iterable
 from typing import Protocol
-from typing_extensions import TypeAlias
+from typing_extensions import Reader, TypeAlias
 from xml.sax._exceptions import (
     SAXException as SAXException,
     SAXNotRecognizedException as SAXNotRecognizedException,
@@ -13,7 +13,7 @@ from xml.sax._exceptions import (
 from xml.sax.handler import ContentHandler as ContentHandler, ErrorHandler as ErrorHandler
 from xml.sax.xmlreader import InputSource as InputSource, XMLReader
 
-class _SupportsReadClose(SupportsRead[_T_co], Protocol[_T_co]):
+class _SupportsReadClose(Reader[_T_co], Protocol[_T_co]):
     def close(self) -> None: ...
 
 _Source: TypeAlias = StrPath | _SupportsReadClose[bytes] | _SupportsReadClose[str]
diff --git a/stdlib/xml/sax/saxutils.pyi b/stdlib/xml/sax/saxutils.pyi
index a29588faae2a..4c7bbbe015e4 100644
--- a/stdlib/xml/sax/saxutils.pyi
+++ b/stdlib/xml/sax/saxutils.pyi
@@ -1,8 +1,8 @@
-from _typeshed import SupportsWrite
 from codecs import StreamReaderWriter, StreamWriter
 from collections.abc import Mapping
 from io import RawIOBase, TextIOBase
 from typing import Literal, NoReturn
+from typing_extensions import Writer
 from xml.sax import _Source, handler, xmlreader
 
 def escape(data: str, entities: Mapping[str, str] = {}) -> str: ...
@@ -12,7 +12,7 @@ def quoteattr(data: str, entities: Mapping[str, str] = {}) -> str: ...
 class XMLGenerator(handler.ContentHandler):
     def __init__(
         self,
-        out: TextIOBase | RawIOBase | StreamWriter | StreamReaderWriter | SupportsWrite[bytes] | None = None,
+        out: TextIOBase | RawIOBase | StreamWriter | StreamReaderWriter | Writer[bytes] | None = None,
         encoding: str = "iso-8859-1",
         short_empty_elements: bool = False,
     ) -> None: ...
diff --git a/stdlib/xmlrpc/client.pyi b/stdlib/xmlrpc/client.pyi
index 6cc4361f4a09..0fe054b8de2f 100644
--- a/stdlib/xmlrpc/client.pyi
+++ b/stdlib/xmlrpc/client.pyi
@@ -1,13 +1,13 @@
 import gzip
 import http.client
 import time
-from _typeshed import ReadableBuffer, SizedBuffer, SupportsRead, SupportsWrite
+from _typeshed import ReadableBuffer, SizedBuffer
 from collections.abc import Callable, Iterable, Mapping
 from datetime import datetime
 from io import BytesIO
 from types import TracebackType
 from typing import Any, ClassVar, Final, Literal, Protocol, overload
-from typing_extensions import Self, TypeAlias
+from typing_extensions import Reader, Self, TypeAlias, Writer
 
 class _SupportsTimeTuple(Protocol):
     def timetuple(self) -> time.struct_time: ...
@@ -85,7 +85,7 @@ class DateTime:
     def make_comparable(self, other: _DateTimeComparable) -> tuple[str, str]: ...  # undocumented
     def timetuple(self) -> time.struct_time: ...  # undocumented
     def decode(self, data: Any) -> None: ...
-    def encode(self, out: SupportsWrite[str]) -> None: ...
+    def encode(self, out: Writer[str]) -> None: ...
 
 def _datetime(data: Any) -> DateTime: ...  # undocumented
 def _datetime_type(data: str) -> datetime: ...  # undocumented
@@ -94,7 +94,7 @@ class Binary:
     data: bytes
     def __init__(self, data: bytes | bytearray | None = None) -> None: ...
     def decode(self, data: ReadableBuffer) -> None: ...
-    def encode(self, out: SupportsWrite[str]) -> None: ...
+    def encode(self, out: Writer[str]) -> None: ...
     def __eq__(self, other: object) -> bool: ...
     __hash__: ClassVar[None]  # type: ignore[assignment]
 
@@ -208,7 +208,7 @@ def gzip_decode(data: ReadableBuffer, max_decode: int = 20971520) -> bytes: ...
 
 class GzipDecodedResponse(gzip.GzipFile):  # undocumented
     io: BytesIO
-    def __init__(self, response: SupportsRead[ReadableBuffer]) -> None: ...
+    def __init__(self, response: Reader[ReadableBuffer]) -> None: ...
 
 class _Method:  # undocumented
     __send: Callable[[str, tuple[_Marshallable, ...]], _Marshallable]