diff --git a/.github/workflows/check_docs.yml b/.github/workflows/check_docs.yml
index 99aecda1..1a9a4ab9 100644
--- a/.github/workflows/check_docs.yml
+++ b/.github/workflows/check_docs.yml
@@ -6,7 +6,7 @@ on:
 
 env:
   POETRY_VERSION: 1.8.2
-  PYTHON_VERSION: 3.11.9
+  PYTHON_VERSION: 3.13.3
 
 jobs:
   check_docs:
diff --git a/src/nitypes/_typing.py b/src/nitypes/_typing.py
index db8a8759..877f1ff5 100644
--- a/src/nitypes/_typing.py
+++ b/src/nitypes/_typing.py
@@ -1,4 +1,21 @@
-"""Single source for typing backports to avoid depending on typing_extensions at run time."""
+"""Version-specific compatibility shims for the standard `typing` module.
+
+For `typing` symbols that require Python 3.10 or later, this submodule redirects to the standard
+`typing` module (when appropriate), the `typing_extensions` package, or provides a minimial stub
+implementation for run time. This allows us to use new typing features without littering the rest of
+our code with conditionals or making our Python packages depend on `typing_extenions` at run time.
+
+For `typing` symbols that are supported in Python 3.9, you do not need this submodule. Import these
+symbols directly from the standard `typing` module.
+
+This submodule is vendored in multiple packages (nitypes, nipanel, etc.) to avoid compatibility
+breakage when upgrading these packages.
+
+Do not add project-specific types to this submodule.
+
+Many of these symbosl are references to `None` at run time. Clients of this submodule should use
+`from __future__ import annotations` to avoid parsing type hints at run time.
+"""
 
 from __future__ import annotations
 
@@ -6,36 +23,111 @@
 from typing import TYPE_CHECKING
 
 if sys.version_info >= (3, 10):
-    from typing import TypeAlias
+    from typing import (
+        Concatenate,
+        ParamSpec,
+        ParamSpecArgs,
+        ParamSpecKwargs,
+        TypeAlias,
+        TypeGuard,
+    )
 elif TYPE_CHECKING:
-    from typing_extensions import TypeAlias
+    from typing_extensions import (
+        Concatenate,
+        ParamSpec,
+        ParamSpecArgs,
+        ParamSpecKwargs,
+        TypeAlias,
+        TypeGuard,
+    )
 else:
-    TypeAlias = None
+    Concatenate = ParamSpecArgs = ParamSpecKwargs = TypeAlias = TypeGuard = None
+
+    def ParamSpec(  # noqa: D103, N802 - Missing docstring, wrong case
+        name, *, bound=None, covariant=False, contravariant=False
+    ):
+        return None
+
 
 if sys.version_info >= (3, 11):
-    from typing import Self, assert_type
+    from typing import (
+        LiteralString,
+        Never,
+        NotRequired,
+        Required,
+        Self,
+        TypeVarTuple,
+        Unpack,
+        assert_never,
+        assert_type,
+        reveal_type,
+    )
 elif TYPE_CHECKING:
-    from typing_extensions import Self, assert_type
+    from typing_extensions import (
+        LiteralString,
+        Never,
+        NotRequired,
+        Required,
+        Self,
+        TypeVarTuple,
+        Unpack,
+        assert_never,
+        assert_type,
+        reveal_type,
+    )
 else:
-    Self = None
+    LiteralString = Never = NotRequired = Required = Self = Unpack = None
+
+    def assert_never(arg, /):  # noqa: D103 - Missing docstring in public function
+        pass
 
     def assert_type(val, typ, /):  # noqa: D103 - Missing docstring in public function
         pass
 
+    def reveal_type(obj, /):  # noqa: D103 - Missing docstring in public function
+        pass
+
+    def TypeVarTuple(name):  # noqa: D103, N802 - Missing docstring, wrong case
+        return None
+
 
 if sys.version_info >= (3, 12):
-    from typing import override
+    from typing import TypeAliasType, override
 elif TYPE_CHECKING:
-    from typing_extensions import override
+    from typing_extensions import TypeAliasType, override
 else:
+    TypeAliasType = None
 
     def override(arg, /):  # noqa: D103 - Missing docstring in public function
         return arg
 
 
+if sys.version_info >= (3, 13):
+    from typing import ReadOnly, TypeIs
+elif TYPE_CHECKING:
+    from typing_extensions import ReadOnly, TypeIs
+else:
+    ReadOnly = TypeIs = None
+
 __all__ = [
+    "assert_never",
     "assert_type",
+    "Concatenate",
+    "LiteralString",
+    "Never",
+    "NotRequired",
     "override",
+    "ParamSpec",
+    "ParamSpecArgs",
+    "ParamSpecKwargs",
+    "ReadOnly",
+    "Required",
+    "reveal_type",
     "Self",
     "TypeAlias",
+    "TypeAliasType",
+    "TypeGuard",
+    "TypeIs",
+    "TypeVarTuple",
+    "Unpack",
 ]
diff --git a/src/nitypes/time/_conversion.py b/src/nitypes/time/_conversion.py
index a850c5c9..134b3abf 100644
--- a/src/nitypes/time/_conversion.py
+++ b/src/nitypes/time/_conversion.py
@@ -8,7 +8,11 @@
 import hightime as ht
 
 from nitypes._exceptions import invalid_arg_type, invalid_requested_type
-from nitypes._typing import TypeAlias
+
+try:
+    from typing import TypeAlias
+except ImportError:
+    from nitypes._typing import TypeAlias
 
 _AnyDateTime: TypeAlias = Union[dt.datetime, ht.datetime]
 _TDateTime = TypeVar("_TDateTime", dt.datetime, ht.datetime)
diff --git a/src/nitypes/waveform/_analog_waveform.py b/src/nitypes/waveform/_analog_waveform.py
index b8f825b4..22146124 100644
--- a/src/nitypes/waveform/_analog_waveform.py
+++ b/src/nitypes/waveform/_analog_waveform.py
@@ -12,7 +12,6 @@
 
 from nitypes._arguments import arg_to_uint, validate_dtype, validate_unsupported_arg
 from nitypes._exceptions import invalid_arg_type, invalid_array_ndim
-from nitypes._typing import Self, TypeAlias
 from nitypes.waveform._exceptions import (
     input_array_data_type_mismatch,
     input_waveform_data_type_mismatch,
@@ -27,6 +26,11 @@
 from nitypes.waveform._timing import BaseTiming, PrecisionTiming, Timing, convert_timing
 from nitypes.waveform._warnings import scale_mode_mismatch
 
+try:
+    from typing import Self, TypeAlias
+except ImportError:
+    from nitypes._typing import Self, TypeAlias
+
 if sys.version_info < (3, 10):
     import array as std_array
 
diff --git a/src/nitypes/waveform/_extended_properties.py b/src/nitypes/waveform/_extended_properties.py
index f5247aa6..203127a3 100644
--- a/src/nitypes/waveform/_extended_properties.py
+++ b/src/nitypes/waveform/_extended_properties.py
@@ -4,7 +4,10 @@
 from collections.abc import Mapping
 from typing import Iterator, MutableMapping, Union
 
-from nitypes._typing import TypeAlias
+try:
+    from typing import TypeAlias
+except ImportError:
+    from nitypes._typing import TypeAlias
 
 # Extended property keys
 CHANNEL_NAME = "NI_ChannelName"
diff --git a/src/nitypes/waveform/_timing/_base.py b/src/nitypes/waveform/_timing/_base.py
index cea359dc..09192c68 100644
--- a/src/nitypes/waveform/_timing/_base.py
+++ b/src/nitypes/waveform/_timing/_base.py
@@ -7,13 +7,18 @@
 from typing import Any, Generic, SupportsIndex, TypeVar
 
 from nitypes._exceptions import add_note
-from nitypes._typing import Self
 from nitypes.waveform._timing._sample_interval import (
     SampleIntervalMode,
     SampleIntervalStrategy,
     create_sample_interval_strategy,
 )
 
+try:
+    from typing import Self
+except ImportError:
+    from nitypes._typing import Self
+
+
 _TDateTime = TypeVar("_TDateTime", bound=dt.datetime)
 _TTimeDelta = TypeVar("_TTimeDelta", bound=dt.timedelta)
 
diff --git a/src/nitypes/waveform/_timing/_conversion.py b/src/nitypes/waveform/_timing/_conversion.py
index 8debd2e7..4242cb19 100644
--- a/src/nitypes/waveform/_timing/_conversion.py
+++ b/src/nitypes/waveform/_timing/_conversion.py
@@ -8,12 +8,16 @@
 import hightime as ht
 
 from nitypes._exceptions import invalid_arg_type, invalid_requested_type
-from nitypes._typing import TypeAlias
 from nitypes.time._conversion import convert_datetime, convert_timedelta
 from nitypes.waveform._timing._base import BaseTiming
 from nitypes.waveform._timing._precision import PrecisionTiming
 from nitypes.waveform._timing._standard import Timing
 
+try:
+    from typing import TypeAlias
+except ImportError:
+    from nitypes._typing import TypeAlias
+
 
 _AnyTiming: TypeAlias = Union[BaseTiming[Any, Any], Timing, PrecisionTiming]
 _TTiming = TypeVar("_TTiming", bound=BaseTiming[Any, Any])
diff --git a/src/nitypes/waveform/_timing/_precision.py b/src/nitypes/waveform/_timing/_precision.py
index c77effcd..14058f86 100644
--- a/src/nitypes/waveform/_timing/_precision.py
+++ b/src/nitypes/waveform/_timing/_precision.py
@@ -5,10 +5,14 @@
 
 import hightime as ht
 
-from nitypes._typing import override
 from nitypes.waveform._timing._base import BaseTiming
 from nitypes.waveform._timing._sample_interval import SampleIntervalMode
 
+try:
+    from typing import override
+except ImportError:
+    from nitypes._typing import override
+
 
 class PrecisionTiming(BaseTiming[ht.datetime, ht.timedelta]):
     """High-precision waveform timing using the hightime package.
diff --git a/src/nitypes/waveform/_timing/_standard.py b/src/nitypes/waveform/_timing/_standard.py
index c9d1e88a..faf1fe66 100644
--- a/src/nitypes/waveform/_timing/_standard.py
+++ b/src/nitypes/waveform/_timing/_standard.py
@@ -4,10 +4,14 @@
 from collections.abc import Sequence
 from typing import ClassVar
 
-from nitypes._typing import override
 from nitypes.waveform._timing._base import BaseTiming
 from nitypes.waveform._timing._sample_interval import SampleIntervalMode
 
+try:
+    from typing import override
+except ImportError:
+    from nitypes._typing import override
+
 
 class Timing(BaseTiming[dt.datetime, dt.timedelta]):
     """Waveform timing using the standard datetime module.