diff --git a/homeassistant/helpers/deprecation.py b/homeassistant/helpers/deprecation.py
index 93520866142..79dd436db95 100644
--- a/homeassistant/helpers/deprecation.py
+++ b/homeassistant/helpers/deprecation.py
@@ -8,14 +8,10 @@ from enum import Enum
 import functools
 import inspect
 import logging
-from typing import Any, NamedTuple, ParamSpec, TypeVar
-
-_ObjectT = TypeVar("_ObjectT", bound=object)
-_R = TypeVar("_R")
-_P = ParamSpec("_P")
+from typing import Any, NamedTuple
 
 
-def deprecated_substitute(
+def deprecated_substitute[_ObjectT: object](
     substitute_name: str,
 ) -> Callable[[Callable[[_ObjectT], Any]], Callable[[_ObjectT], Any]]:
     """Help migrate properties to new names.
@@ -92,7 +88,7 @@ def get_deprecated(
     return config.get(new_name, default)
 
 
-def deprecated_class(
+def deprecated_class[**_P, _R](
     replacement: str, *, breaks_in_ha_version: str | None = None
 ) -> Callable[[Callable[_P, _R]], Callable[_P, _R]]:
     """Mark class as deprecated and provide a replacement class to be used instead.
@@ -117,7 +113,7 @@ def deprecated_class(
     return deprecated_decorator
 
 
-def deprecated_function(
+def deprecated_function[**_P, _R](
     replacement: str, *, breaks_in_ha_version: str | None = None
 ) -> Callable[[Callable[_P, _R]], Callable[_P, _R]]:
     """Mark function as deprecated and provide a replacement to be used instead.
diff --git a/homeassistant/helpers/entity.py b/homeassistant/helpers/entity.py
index 54fd1aafaeb..c6f18314012 100644
--- a/homeassistant/helpers/entity.py
+++ b/homeassistant/helpers/entity.py
@@ -16,16 +16,7 @@ from operator import attrgetter
 import sys
 import time
 from types import FunctionType
-from typing import (
-    TYPE_CHECKING,
-    Any,
-    Final,
-    Literal,
-    NotRequired,
-    TypedDict,
-    TypeVar,
-    final,
-)
+from typing import TYPE_CHECKING, Any, Final, Literal, NotRequired, TypedDict, final
 
 import voluptuous as vol
 
@@ -79,8 +70,6 @@ timer = time.time
 if TYPE_CHECKING:
     from .entity_platform import EntityPlatform
 
-_T = TypeVar("_T")
-
 _LOGGER = logging.getLogger(__name__)
 SLOW_UPDATE_WARNING = 10
 DATA_ENTITY_SOURCE = "entity_info"
@@ -1603,7 +1592,7 @@ class Entity(
             return f"<entity unknown.unknown={STATE_UNKNOWN}>"
         return f"<entity {self.entity_id}={self._stringify_state(self.available)}>"
 
-    async def async_request_call(self, coro: Coroutine[Any, Any, _T]) -> _T:
+    async def async_request_call[_T](self, coro: Coroutine[Any, Any, _T]) -> _T:
         """Process request batched."""
         if self.parallel_updates:
             await self.parallel_updates.acquire()
diff --git a/homeassistant/helpers/entity_registry.py b/homeassistant/helpers/entity_registry.py
index 2964c55af74..1c43c8e7ec9 100644
--- a/homeassistant/helpers/entity_registry.py
+++ b/homeassistant/helpers/entity_registry.py
@@ -16,7 +16,7 @@ from enum import StrEnum
 from functools import cached_property
 import logging
 import time
-from typing import TYPE_CHECKING, Any, Literal, NotRequired, TypedDict, TypeVar
+from typing import TYPE_CHECKING, Any, Literal, NotRequired, TypedDict
 
 import attr
 import voluptuous as vol
@@ -65,8 +65,6 @@ from .typing import UNDEFINED, UndefinedType
 if TYPE_CHECKING:
     from homeassistant.config_entries import ConfigEntry
 
-T = TypeVar("T")
-
 DATA_REGISTRY: HassKey[EntityRegistry] = HassKey("entity_registry")
 EVENT_ENTITY_REGISTRY_UPDATED: EventType[EventEntityRegistryUpdatedData] = EventType(
     "entity_registry_updated"
@@ -852,7 +850,7 @@ class EntityRegistry(BaseRegistry):
         ):
             disabled_by = RegistryEntryDisabler.INTEGRATION
 
-        def none_if_undefined(value: T | UndefinedType) -> T | None:
+        def none_if_undefined[_T](value: _T | UndefinedType) -> _T | None:
             """Return None if value is UNDEFINED, otherwise return value."""
             return None if value is UNDEFINED else value
 
diff --git a/homeassistant/helpers/frame.py b/homeassistant/helpers/frame.py
index 2a6e8f87a8f..321094ba8d9 100644
--- a/homeassistant/helpers/frame.py
+++ b/homeassistant/helpers/frame.py
@@ -12,7 +12,7 @@ import linecache
 import logging
 import sys
 from types import FrameType
-from typing import Any, TypeVar, cast
+from typing import Any, cast
 
 from homeassistant.core import HomeAssistant, async_get_hass
 from homeassistant.exceptions import HomeAssistantError
@@ -23,8 +23,6 @@ _LOGGER = logging.getLogger(__name__)
 # Keep track of integrations already reported to prevent flooding
 _REPORTED_INTEGRATIONS: set[str] = set()
 
-_CallableT = TypeVar("_CallableT", bound=Callable)
-
 
 @dataclass(kw_only=True)
 class IntegrationFrame:
@@ -209,7 +207,7 @@ def _report_integration(
     )
 
 
-def warn_use(func: _CallableT, what: str) -> _CallableT:
+def warn_use[_CallableT: Callable](func: _CallableT, what: str) -> _CallableT:
     """Mock a function to warn when it was about to be used."""
     if asyncio.iscoroutinefunction(func):
 
diff --git a/homeassistant/helpers/ratelimit.py b/homeassistant/helpers/ratelimit.py
index 020c7c3a0d3..c9b1f21cba7 100644
--- a/homeassistant/helpers/ratelimit.py
+++ b/homeassistant/helpers/ratelimit.py
@@ -6,12 +6,9 @@ import asyncio
 from collections.abc import Callable, Hashable
 import logging
 import time
-from typing import TypeVarTuple
 
 from homeassistant.core import HomeAssistant, callback
 
-_Ts = TypeVarTuple("_Ts")
-
 _LOGGER = logging.getLogger(__name__)
 
 
@@ -52,7 +49,7 @@ class KeyedRateLimit:
         self._rate_limit_timers.clear()
 
     @callback
-    def async_schedule_action(
+    def async_schedule_action[*_Ts](
         self,
         key: Hashable,
         rate_limit: float | None,
diff --git a/homeassistant/helpers/redact.py b/homeassistant/helpers/redact.py
index ad06f58a50a..6db0ab4bdd9 100644
--- a/homeassistant/helpers/redact.py
+++ b/homeassistant/helpers/redact.py
@@ -3,15 +3,12 @@
 from __future__ import annotations
 
 from collections.abc import Callable, Iterable, Mapping
-from typing import Any, TypeVar, cast, overload
+from typing import Any, cast, overload
 
 from homeassistant.core import callback
 
 REDACTED = "**REDACTED**"
 
-_T = TypeVar("_T")
-_ValueT = TypeVar("_ValueT")
-
 
 def partial_redact(
     x: str | Any, unmasked_prefix: int = 4, unmasked_suffix: int = 4
@@ -32,19 +29,19 @@ def partial_redact(
 
 
 @overload
-def async_redact_data(  # type: ignore[overload-overlap]
+def async_redact_data[_ValueT](  # type: ignore[overload-overlap]
     data: Mapping, to_redact: Iterable[Any] | Mapping[Any, Callable[[_ValueT], _ValueT]]
 ) -> dict: ...
 
 
 @overload
-def async_redact_data(
+def async_redact_data[_T, _ValueT](
     data: _T, to_redact: Iterable[Any] | Mapping[Any, Callable[[_ValueT], _ValueT]]
 ) -> _T: ...
 
 
 @callback
-def async_redact_data(
+def async_redact_data[_T, _ValueT](
     data: _T, to_redact: Iterable[Any] | Mapping[Any, Callable[[_ValueT], _ValueT]]
 ) -> _T:
     """Redact sensitive data in a dict."""
diff --git a/homeassistant/helpers/script.py b/homeassistant/helpers/script.py
index 7af29fb4327..c268a21758f 100644
--- a/homeassistant/helpers/script.py
+++ b/homeassistant/helpers/script.py
@@ -13,7 +13,7 @@ from functools import cached_property, partial
 import itertools
 import logging
 from types import MappingProxyType
-from typing import Any, Literal, TypedDict, TypeVar, cast
+from typing import Any, Literal, TypedDict, cast
 
 import async_interrupt
 import voluptuous as vol
@@ -111,8 +111,6 @@ from .typing import UNDEFINED, ConfigType, UndefinedType
 
 # mypy: allow-untyped-calls, allow-untyped-defs, no-check-untyped-defs
 
-_T = TypeVar("_T")
-
 SCRIPT_MODE_PARALLEL = "parallel"
 SCRIPT_MODE_QUEUED = "queued"
 SCRIPT_MODE_RESTART = "restart"
@@ -713,7 +711,9 @@ class _ScriptRun:
         else:
             wait_var["remaining"] = None
 
-    async def _async_run_long_action(self, long_task: asyncio.Task[_T]) -> _T | None:
+    async def _async_run_long_action[_T](
+        self, long_task: asyncio.Task[_T]
+    ) -> _T | None:
         """Run a long task while monitoring for stop request."""
         try:
             async with async_interrupt.interrupt(self._stop, ScriptStoppedError, None):
diff --git a/homeassistant/helpers/service.py b/homeassistant/helpers/service.py
index 1396f37e665..7d5a15f41b2 100644
--- a/homeassistant/helpers/service.py
+++ b/homeassistant/helpers/service.py
@@ -68,9 +68,6 @@ from .typing import ConfigType, TemplateVarsType
 if TYPE_CHECKING:
     from .entity import Entity
 
-    _EntityT = TypeVar("_EntityT", bound=Entity)
-
-
 CONF_SERVICE_ENTITY_ID = "entity_id"
 
 _LOGGER = logging.getLogger(__name__)
@@ -434,7 +431,7 @@ def extract_entity_ids(
 
 
 @bind_hass
-async def async_extract_entities(
+async def async_extract_entities[_EntityT: Entity](
     hass: HomeAssistant,
     entities: Iterable[_EntityT],
     service_call: ServiceCall,
diff --git a/homeassistant/helpers/template.py b/homeassistant/helpers/template.py
index 44b67f1c228..32c0ff244a6 100644
--- a/homeassistant/helpers/template.py
+++ b/homeassistant/helpers/template.py
@@ -22,17 +22,7 @@ import statistics
 from struct import error as StructError, pack, unpack_from
 import sys
 from types import CodeType, TracebackType
-from typing import (
-    Any,
-    Concatenate,
-    Literal,
-    NoReturn,
-    ParamSpec,
-    Self,
-    TypeVar,
-    cast,
-    overload,
-)
+from typing import Any, Concatenate, Literal, NoReturn, Self, cast, overload
 from urllib.parse import urlencode as urllib_urlencode
 import weakref
 
@@ -134,10 +124,6 @@ _COLLECTABLE_STATE_ATTRIBUTES = {
     "name",
 }
 
-_T = TypeVar("_T")
-_R = TypeVar("_R")
-_P = ParamSpec("_P")
-
 ALL_STATES_RATE_LIMIT = 60  # seconds
 DOMAIN_STATES_RATE_LIMIT = 1  # seconds
 
@@ -1217,10 +1203,10 @@ def forgiving_boolean(value: Any) -> bool | object: ...
 
 
 @overload
-def forgiving_boolean(value: Any, default: _T) -> bool | _T: ...
+def forgiving_boolean[_T](value: Any, default: _T) -> bool | _T: ...
 
 
-def forgiving_boolean(
+def forgiving_boolean[_T](
     value: Any, default: _T | object = _SENTINEL
 ) -> bool | _T | object:
     """Try to convert value to a boolean."""
@@ -2840,7 +2826,7 @@ class TemplateEnvironment(ImmutableSandboxedEnvironment):
         # evaluated fresh with every execution, rather than executed
         # at compile time and the value stored. The context itself
         # can be discarded, we only need to get at the hass object.
-        def hassfunction(
+        def hassfunction[**_P, _R](
             func: Callable[Concatenate[HomeAssistant, _P], _R],
             jinja_context: Callable[
                 [Callable[Concatenate[Any, _P], _R]],
diff --git a/homeassistant/helpers/trace.py b/homeassistant/helpers/trace.py
index 1f5aa47f4e2..17019863d9f 100644
--- a/homeassistant/helpers/trace.py
+++ b/homeassistant/helpers/trace.py
@@ -7,16 +7,13 @@ from collections.abc import Callable, Coroutine, Generator
 from contextlib import contextmanager
 from contextvars import ContextVar
 from functools import wraps
-from typing import Any, TypeVar, TypeVarTuple
+from typing import Any
 
 from homeassistant.core import ServiceResponse
 import homeassistant.util.dt as dt_util
 
 from .typing import TemplateVarsType
 
-_T = TypeVar("_T")
-_Ts = TypeVarTuple("_Ts")
-
 
 class TraceElement:
     """Container for trace data."""
@@ -135,7 +132,9 @@ def trace_id_get() -> tuple[str, str] | None:
     return trace_id_cv.get()
 
 
-def trace_stack_push(trace_stack_var: ContextVar[list[_T] | None], node: _T) -> None:
+def trace_stack_push[_T](
+    trace_stack_var: ContextVar[list[_T] | None], node: _T
+) -> None:
     """Push an element to the top of a trace stack."""
     trace_stack: list[_T] | None
     if (trace_stack := trace_stack_var.get()) is None:
@@ -151,7 +150,7 @@ def trace_stack_pop(trace_stack_var: ContextVar[list[Any] | None]) -> None:
         trace_stack.pop()
 
 
-def trace_stack_top(trace_stack_var: ContextVar[list[_T] | None]) -> _T | None:
+def trace_stack_top[_T](trace_stack_var: ContextVar[list[_T] | None]) -> _T | None:
     """Return the element at the top of a trace stack."""
     trace_stack = trace_stack_var.get()
     return trace_stack[-1] if trace_stack else None
@@ -261,7 +260,7 @@ def trace_path(suffix: str | list[str]) -> Generator[None, None, None]:
         trace_path_pop(count)
 
 
-def async_trace_path(
+def async_trace_path[*_Ts](
     suffix: str | list[str],
 ) -> Callable[
     [Callable[[*_Ts], Coroutine[Any, Any, None]]],