diff --git a/.github/workflows/ci-docker.yml b/.github/workflows/ci-docker.yml
index 71dedd65aa..f3f7cb30eb 100644
--- a/.github/workflows/ci-docker.yml
+++ b/.github/workflows/ci-docker.yml
@@ -67,7 +67,7 @@ jobs:
         with:
           python-version: "3.12"
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@bb05f3f5519dd87d3ba754cc423b652a5edd6d2c # v4.2.0
+        uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4.3.0
 
       - name: Determine tag and whether to push
         id: tag
@@ -153,7 +153,7 @@ jobs:
         with:
           python-version: "3.12"
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@bb05f3f5519dd87d3ba754cc423b652a5edd6d2c # v4.2.0
+        uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4.3.0
 
       - name: Log in to the GitHub container registry
         uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4.6.0
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 10b28ace38..d0dee8165c 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -123,7 +123,7 @@ jobs:
           python-version: "3.12"
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@bb05f3f5519dd87d3ba754cc423b652a5edd6d2c # v4.2.0
+        uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4.3.0
 
       - name: Log in to docker hub
         uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4.6.0
@@ -202,7 +202,7 @@ jobs:
           merge-multiple: true
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@bb05f3f5519dd87d3ba754cc423b652a5edd6d2c # v4.2.0
+        uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4.3.0
 
       - name: Log in to docker hub
         if: matrix.registry == 'dockerhub'
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 55aa0ac982..9f27d51059 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -22,7 +22,7 @@ RUN \
     -r /requirements.txt
 
 # Install the ESPHome Device Builder dashboard.
-RUN uv pip install --no-cache-dir esphome-device-builder==1.12.1
+RUN uv pip install --no-cache-dir esphome-device-builder==1.12.4
 
 RUN \
     platformio settings set enable_telemetry No \
diff --git a/esphome/components/adc/__init__.py b/esphome/components/adc/__init__.py
index 1c50b6b81b..5c763a4f4c 100644
--- a/esphome/components/adc/__init__.py
+++ b/esphome/components/adc/__init__.py
@@ -1,3 +1,5 @@
+from typing import Any
+
 from esphome import pins
 import esphome.codegen as cg
 from esphome.components.esp32 import (
@@ -16,6 +18,7 @@ from esphome.components.esp32 import (
 import esphome.config_validation as cv
 from esphome.const import CONF_ANALOG, CONF_INPUT, CONF_NUMBER, PLATFORM_ESP8266
 from esphome.core import CORE
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@esphome/core"]
 
@@ -225,7 +228,7 @@ ESP32_VARIANT_ADC2_PIN_TO_CHANNEL = {
 }
 
 
-def validate_adc_pin(value):
+def validate_adc_pin(value: Any) -> ConfigType | str:
     if str(value).upper() == "VCC":
         if CORE.is_rp2:
             return pins.internal_gpio_input_pin_schema(29)
diff --git a/esphome/components/adc/sensor.py b/esphome/components/adc/sensor.py
index b2a4382a21..5d1031825e 100644
--- a/esphome/components/adc/sensor.py
+++ b/esphome/components/adc/sensor.py
@@ -52,7 +52,7 @@ _attenuation = cv.enum(ATTENUATION_MODES, lower=True)
 _sampling_mode = cv.enum(SAMPLING_MODES, lower=True)
 
 
-def validate_config(config):
+def validate_config(config: ConfigType) -> ConfigType:
     if config[CONF_RAW] and config.get(CONF_ATTENUATION, None) == "auto":
         raise cv.Invalid("Automatic attenuation cannot be used when raw output is set")
 
@@ -120,7 +120,7 @@ CONFIG_SCHEMA = cv.All(
 CONF_ADC_CHANNEL_ID = "adc_channel_id"
 
 
-def _overlay_io_channels():
+def _overlay_io_channels() -> str:
     channel_count = CORE.data[CONF_ADC_CHANNEL_ID]
     entries = ", ".join(f"<&adc {channel_id}>" for channel_id in range(channel_count))
     return f"""
@@ -132,7 +132,7 @@ def _overlay_io_channels():
             """
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await sensor.register_sensor(var, config)
diff --git a/esphome/components/ags10/sensor.py b/esphome/components/ags10/sensor.py
index 6491d7d810..8606e7c247 100644
--- a/esphome/components/ags10/sensor.py
+++ b/esphome/components/ags10/sensor.py
@@ -17,6 +17,9 @@ from esphome.const import (
     UNIT_OHM,
     UNIT_PARTS_PER_BILLION,
 )
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 CONF_RESISTANCE = "resistance"
 
@@ -62,7 +65,7 @@ CONFIG_SCHEMA = (
 FINAL_VALIDATE_SCHEMA = i2c.final_validate_device_schema("ags10", max_frequency="15khz")
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
@@ -94,7 +97,12 @@ AGS10_NEW_I2C_ADDRESS_SCHEMA = cv.maybe_simple_value(
     AGS10_NEW_I2C_ADDRESS_SCHEMA,
     synchronous=True,
 )
-async def ags10newi2caddress_to_code(config, action_id, template_arg, args):
+async def ags10newi2caddress_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     address = await cg.templatable(config[CONF_ADDRESS], args, cg.uint8)
@@ -126,7 +134,12 @@ AGS10_SET_ZERO_POINT_SCHEMA = cv.Schema(
     AGS10_SET_ZERO_POINT_SCHEMA,
     synchronous=True,
 )
-async def ags10setzeropoint_to_code(config, action_id, template_arg, args):
+async def ags10setzeropoint_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     mode = await cg.templatable(
diff --git a/esphome/components/animation/image.py b/esphome/components/animation/image.py
index 73d428bd20..0265a350f7 100644
--- a/esphome/components/animation/image.py
+++ b/esphome/components/animation/image.py
@@ -6,6 +6,8 @@ from esphome.components.file.image import image_schema, write_image
 from esphome.components.image import Image_, validate_settings
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_REPEAT
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
 from esphome.types import ConfigType
 
 CODEOWNERS = ["@syndlex"]
@@ -79,7 +81,12 @@ SET_FRAME_SCHEMA = cv.Schema(
 @automation.register_action(
     "animation.set_frame", SetFrameAction, SET_FRAME_SCHEMA, synchronous=True
 )
-async def animation_action_to_code(config, action_id, template_arg, args):
+async def animation_action_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, paren)
 
diff --git a/esphome/components/apds9960/__init__.py b/esphome/components/apds9960/__init__.py
index 99e37d3764..7ac1e5eb32 100644
--- a/esphome/components/apds9960/__init__.py
+++ b/esphome/components/apds9960/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import i2c
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.types import ConfigType
 
 DEPENDENCIES = ["i2c"]
 MULTI_CONF = True
@@ -57,7 +58,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
diff --git a/esphome/components/apds9960/binary_sensor.py b/esphome/components/apds9960/binary_sensor.py
index 48e923ab2b..342f688249 100644
--- a/esphome/components/apds9960/binary_sensor.py
+++ b/esphome/components/apds9960/binary_sensor.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import binary_sensor
 import esphome.config_validation as cv
 from esphome.const import CONF_DIRECTION, DEVICE_CLASS_MOVING
+from esphome.types import ConfigType
 
 from . import APDS9960, CONF_APDS9960_ID
 
@@ -19,7 +20,7 @@ CONFIG_SCHEMA = binary_sensor.binary_sensor_schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_APDS9960_ID])
     var = await binary_sensor.new_binary_sensor(config)
     func = getattr(hub, f"set_{config[CONF_DIRECTION]}_direction_binary_sensor")
diff --git a/esphome/components/apds9960/sensor.py b/esphome/components/apds9960/sensor.py
index 468eb0995f..a75fb79d1b 100644
--- a/esphome/components/apds9960/sensor.py
+++ b/esphome/components/apds9960/sensor.py
@@ -7,6 +7,7 @@ from esphome.const import (
     STATE_CLASS_MEASUREMENT,
     UNIT_PERCENT,
 )
+from esphome.types import ConfigType
 
 from . import APDS9960, CONF_APDS9960_ID
 
@@ -27,7 +28,7 @@ CONFIG_SCHEMA = sensor.sensor_schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_APDS9960_ID])
     var = await sensor.new_sensor(config)
     func = getattr(hub, f"set_{config[CONF_TYPE]}_sensor")
diff --git a/esphome/components/api/__init__.py b/esphome/components/api/__init__.py
index 912d580a0f..0dc4b905bf 100644
--- a/esphome/components/api/__init__.py
+++ b/esphome/components/api/__init__.py
@@ -1,5 +1,6 @@
 import base64
 import logging
+from typing import Any
 
 from esphome import automation
 from esphome.automation import Condition
@@ -129,7 +130,7 @@ def _register_provisioning_source(config: ConfigType) -> ConfigType:
     return config
 
 
-def validate_encryption_key(value):
+def validate_encryption_key(value: Any) -> str:
     value = cv.string_strict(value)
     try:
         decoded = base64.b64decode(value, validate=True)
@@ -217,7 +218,7 @@ def _auto_detect_supports_response(config: ConfigType) -> ConfigType:
     return config
 
 
-def _validate_supports_response(value):
+def _validate_supports_response(value: Any) -> str:
     """Validate supports_response after auto-detection has set the value."""
     return cv.enum(SUPPORTS_RESPONSE_OPTIONS, lower=True)(value)
 
@@ -256,7 +257,7 @@ ENCRYPTION_SCHEMA = cv.Schema(
 )
 
 
-def _encryption_schema(config):
+def _encryption_schema(config: ConfigType | None) -> ConfigType:
     if config is None:
         config = {}
     return ENCRYPTION_SCHEMA(config)
@@ -393,7 +394,7 @@ async def to_code(config: ConfigType) -> None:
 
     if actions := config.get(CONF_ACTIONS, []):
         # Collect all triggers first, then register all at once with initializer_list
-        triggers: list[cg.Pvariable] = []
+        triggers: list[cg.MockObj] = []
         for conf in actions:
             func_args: list[tuple[MockObj, str]] = []
             service_template_args: list[MockObj] = []  # User service argument types
@@ -581,7 +582,7 @@ async def homeassistant_service_to_code(
     action_id: ID,
     template_arg: cg.TemplateArguments,
     args: TemplateArgsType,
-):
+) -> MockObj:
     cg.add_define("USE_API_HOMEASSISTANT_SERVICES")
     serv = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, serv, False)
@@ -647,7 +648,7 @@ async def homeassistant_service_to_code(
     return var
 
 
-def validate_homeassistant_event(value):
+def validate_homeassistant_event(value: Any) -> str:
     value = cv.string(value)
     if not value.startswith("esphome."):
         raise cv.Invalid(
@@ -676,7 +677,12 @@ HOMEASSISTANT_EVENT_ACTION_SCHEMA = cv.Schema(
     HOMEASSISTANT_EVENT_ACTION_SCHEMA,
     synchronous=True,
 )
-async def homeassistant_event_to_code(config, action_id, template_arg, args):
+async def homeassistant_event_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     cg.add_define("USE_API_HOMEASSISTANT_SERVICES")
     serv = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, serv, True)
@@ -724,7 +730,12 @@ HOMEASSISTANT_TAG_SCANNED_ACTION_SCHEMA = cv.maybe_simple_value(
     HOMEASSISTANT_TAG_SCANNED_ACTION_SCHEMA,
     synchronous=True,
 )
-async def homeassistant_tag_scanned_to_code(config, action_id, template_arg, args):
+async def homeassistant_tag_scanned_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     cg.add_define("USE_API_HOMEASSISTANT_SERVICES")
     serv = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, serv, True)
@@ -740,7 +751,7 @@ CONF_SUCCESS = "success"
 CONF_ERROR_MESSAGE = "error_message"
 
 
-def _validate_api_respond_data(config):
+def _validate_api_respond_data(config: ConfigType) -> ConfigType:
     """Set flag during validation so AUTO_LOAD can include json component."""
     if CONF_DATA in config:
         CORE.data.setdefault(DOMAIN, {})[CONF_CAPTURE_RESPONSE] = True
@@ -824,7 +835,12 @@ API_CONNECTED_CONDITION_SCHEMA = cv.Schema(
 @automation.register_condition(
     "api.connected", APIConnectedCondition, API_CONNECTED_CONDITION_SCHEMA
 )
-async def api_connected_to_code(config, condition_id, template_arg, args):
+async def api_connected_to_code(
+    config: ConfigType,
+    condition_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(condition_id, template_arg)
     templ = await cg.templatable(config[CONF_STATE_SUBSCRIPTION_ONLY], args, cg.bool_)
     cg.add(var.set_state_subscription_only(templ))
diff --git a/esphome/components/as3935/__init__.py b/esphome/components/as3935/__init__.py
index 70015c53b9..bd02d22d1b 100644
--- a/esphome/components/as3935/__init__.py
+++ b/esphome/components/as3935/__init__.py
@@ -14,6 +14,8 @@ from esphome.const import (
     CONF_TUNE_ANTENNA,
     CONF_WATCHDOG_THRESHOLD,
 )
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 MULTI_CONF = True
 
@@ -42,7 +44,7 @@ AS3935_SCHEMA = cv.Schema(
 )
 
 
-async def setup_as3935(var, config):
+async def setup_as3935(var: MockObj, config: ConfigType) -> None:
     await cg.register_component(var, config)
 
     irq_pin = await cg.gpio_pin_expression(config[CONF_IRQ_PIN])
diff --git a/esphome/components/as3935/binary_sensor.py b/esphome/components/as3935/binary_sensor.py
index 10004e69dc..929b653294 100644
--- a/esphome/components/as3935/binary_sensor.py
+++ b/esphome/components/as3935/binary_sensor.py
@@ -1,6 +1,7 @@
 import esphome.codegen as cg
 from esphome.components import binary_sensor
 import esphome.config_validation as cv
+from esphome.types import ConfigType
 
 from . import AS3935, CONF_AS3935_ID
 
@@ -13,7 +14,7 @@ CONFIG_SCHEMA = binary_sensor.binary_sensor_schema().extend(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_AS3935_ID])
     var = await binary_sensor.new_binary_sensor(config)
     cg.add(hub.set_thunder_alert_binary_sensor(var))
diff --git a/esphome/components/as3935/sensor.py b/esphome/components/as3935/sensor.py
index 9b43155563..b727b8fdb9 100644
--- a/esphome/components/as3935/sensor.py
+++ b/esphome/components/as3935/sensor.py
@@ -9,6 +9,7 @@ from esphome.const import (
     STATE_CLASS_MEASUREMENT,
     UNIT_KILOMETER,
 )
+from esphome.types import ConfigType
 
 from . import AS3935, CONF_AS3935_ID
 
@@ -31,7 +32,7 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_AS3935_ID])
 
     if distance_config := config.get(CONF_DISTANCE):
diff --git a/esphome/components/at581x/__init__.py b/esphome/components/at581x/__init__.py
index 5031b72cce..193e62f615 100644
--- a/esphome/components/at581x/__init__.py
+++ b/esphome/components/at581x/__init__.py
@@ -4,6 +4,9 @@ import esphome.codegen as cg
 from esphome.components import i2c
 import esphome.config_validation as cv
 from esphome.const import CONF_FREQUENCY, CONF_ID
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@X-Ryl669"]
 DEPENDENCIES = ["i2c"]
@@ -70,7 +73,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
@@ -91,7 +94,12 @@ AT581XSettingsAction = at581x_ns.class_("AT581XSettingsAction", automation.Actio
     ),
     synchronous=True,
 )
-async def at581x_reset_to_code(config, action_id, template_arg, args):
+async def at581x_reset_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
 
@@ -163,7 +171,12 @@ RADAR_SETTINGS_SCHEMA = cv.Schema(
     RADAR_SETTINGS_SCHEMA,
     synchronous=True,
 )
-async def at581x_settings_to_code(config, action_id, template_arg, args):
+async def at581x_settings_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
 
diff --git a/esphome/components/at581x/switch/__init__.py b/esphome/components/at581x/switch/__init__.py
index 8e1b82b356..7e45ed89ec 100644
--- a/esphome/components/at581x/switch/__init__.py
+++ b/esphome/components/at581x/switch/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import switch
 import esphome.config_validation as cv
 from esphome.const import DEVICE_CLASS_SWITCH, ICON_WIFI
+from esphome.types import ConfigType
 
 from .. import CONF_AT581X_ID, AT581XComponent, at581x_ns
 
@@ -22,7 +23,7 @@ CONFIG_SCHEMA = switch.switch_schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     at581x_component = await cg.get_variable(config[CONF_AT581X_ID])
     s = await switch.new_switch(config)
     await cg.register_parented(s, config[CONF_AT581X_ID])
diff --git a/esphome/components/audio/audio.cpp b/esphome/components/audio/audio.cpp
index b0aa3c1abb..402e741059 100644
--- a/esphome/components/audio/audio.cpp
+++ b/esphome/components/audio/audio.cpp
@@ -86,7 +86,7 @@ AudioFileType detect_audio_file_type(const char *content_type, const char *url)
     // Match "audio/ogg" with a codecs parameter containing "opus"
     // Valid forms: audio/ogg;codecs=opus, audio/ogg; codecs="opus", etc.
     // Plain "audio/ogg" without opus is not matched (almost always Ogg Vorbis)
-    if (strncasecmp(content_type, "audio/ogg", 9) == 0 && strcasestr(content_type + 9, "opus") != nullptr) {
+    if (strncasecmp(content_type, "audio/ogg", 9) == 0 && str_contains_ignore_case(content_type + 9, "opus")) {
       return AudioFileType::OPUS;
     }
 #endif
diff --git a/esphome/components/bedjet/__init__.py b/esphome/components/bedjet/__init__.py
index d4bf813846..1b967e665a 100644
--- a/esphome/components/bedjet/__init__.py
+++ b/esphome/components/bedjet/__init__.py
@@ -2,6 +2,8 @@ import esphome.codegen as cg
 from esphome.components import ble_client, time
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_RECEIVE_TIMEOUT, CONF_TIME_ID
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@jhansche"]
 DEPENDENCIES = ["ble_client"]
@@ -32,12 +34,12 @@ BEDJET_CLIENT_SCHEMA = cv.Schema(
 )
 
 
-async def register_bedjet_child(var, config):
+async def register_bedjet_child(var: MockObj, config: ConfigType) -> None:
     parent = await cg.get_variable(config[CONF_BEDJET_ID])
     cg.add(parent.register_child(var))
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await ble_client.register_ble_node(var, config)
diff --git a/esphome/components/bedjet/climate/__init__.py b/esphome/components/bedjet/climate/__init__.py
index 4de9dcca0b..36650d643c 100644
--- a/esphome/components/bedjet/climate/__init__.py
+++ b/esphome/components/bedjet/climate/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import climate
 import esphome.config_validation as cv
 from esphome.const import CONF_HEAT_MODE, CONF_TEMPERATURE_SOURCE
+from esphome.types import ConfigType
 
 from .. import BEDJET_CLIENT_SCHEMA, bedjet_ns, register_bedjet_child
 
@@ -37,7 +38,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await climate.new_climate(config)
     await cg.register_component(var, config)
     await register_bedjet_child(var, config)
diff --git a/esphome/components/bedjet/fan/__init__.py b/esphome/components/bedjet/fan/__init__.py
index a4a611fefc..f5dfe32f4c 100644
--- a/esphome/components/bedjet/fan/__init__.py
+++ b/esphome/components/bedjet/fan/__init__.py
@@ -1,6 +1,7 @@
 import esphome.codegen as cg
 from esphome.components import fan
 import esphome.config_validation as cv
+from esphome.types import ConfigType
 
 from .. import BEDJET_CLIENT_SCHEMA, bedjet_ns, register_bedjet_child
 
@@ -16,7 +17,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await fan.new_fan(config)
     await cg.register_component(var, config)
     await register_bedjet_child(var, config)
diff --git a/esphome/components/bedjet/sensor/__init__.py b/esphome/components/bedjet/sensor/__init__.py
index fa9ca7953e..595e798e49 100644
--- a/esphome/components/bedjet/sensor/__init__.py
+++ b/esphome/components/bedjet/sensor/__init__.py
@@ -9,6 +9,7 @@ from esphome.const import (
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
 )
+from esphome.types import ConfigType
 
 from .. import BEDJET_CLIENT_SCHEMA, bedjet_ns, register_bedjet_child
 
@@ -38,7 +39,7 @@ CONFIG_SCHEMA = cv.Schema(
 ).extend(BEDJET_CLIENT_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await register_bedjet_child(var, config)
diff --git a/esphome/components/bme680_bsec/__init__.py b/esphome/components/bme680_bsec/__init__.py
index e1e01facd0..35df2a7ea3 100644
--- a/esphome/components/bme680_bsec/__init__.py
+++ b/esphome/components/bme680_bsec/__init__.py
@@ -3,6 +3,7 @@ from esphome.components import esp32, i2c
 from esphome.components.const import CONF_STATE_SAVE_INTERVAL
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_SAMPLE_RATE, CONF_TEMPERATURE_OFFSET, Framework
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@trvrnrth"]
 DEPENDENCIES = ["i2c"]
@@ -76,7 +77,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
diff --git a/esphome/components/bme680_bsec/sensor.py b/esphome/components/bme680_bsec/sensor.py
index bdc8d8f2d3..153890b57f 100644
--- a/esphome/components/bme680_bsec/sensor.py
+++ b/esphome/components/bme680_bsec/sensor.py
@@ -29,6 +29,8 @@ from esphome.const import (
     UNIT_PARTS_PER_MILLION,
     UNIT_PERCENT,
 )
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 from . import CONF_BME680_BSEC_ID, SAMPLE_RATE_OPTIONS, BME680BSECComponent
 
@@ -110,7 +112,7 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def setup_conf(config, key, hub):
+async def setup_conf(config: ConfigType, key: str, hub: MockObj) -> None:
     if sensor_config := config.get(key):
         sens = await sensor.new_sensor(sensor_config)
         cg.add(getattr(hub, f"set_{key}_sensor")(sens))
@@ -120,7 +122,7 @@ async def setup_conf(config, key, hub):
             )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_BME680_BSEC_ID])
     for key in TYPES:
         await setup_conf(config, key, hub)
diff --git a/esphome/components/bme680_bsec/text_sensor.py b/esphome/components/bme680_bsec/text_sensor.py
index 1fbb9e2aeb..6da1c9d287 100644
--- a/esphome/components/bme680_bsec/text_sensor.py
+++ b/esphome/components/bme680_bsec/text_sensor.py
@@ -2,6 +2,8 @@ import esphome.codegen as cg
 from esphome.components import text_sensor
 import esphome.config_validation as cv
 from esphome.const import CONF_IAQ_ACCURACY
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 from . import CONF_BME680_BSEC_ID, BME680BSECComponent
 
@@ -21,13 +23,13 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def setup_conf(config, key, hub):
+async def setup_conf(config: ConfigType, key: str, hub: MockObj) -> None:
     if sensor_config := config.get(key):
         sens = await text_sensor.new_text_sensor(sensor_config)
         cg.add(getattr(hub, f"set_{key}_text_sensor")(sens))
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_BME680_BSEC_ID])
     for key in TYPES:
         await setup_conf(config, key, hub)
diff --git a/esphome/components/bthome_mithermometer/__init__.py b/esphome/components/bthome_mithermometer/__init__.py
index 4be7ca8268..ed0cbaa9e1 100644
--- a/esphome/components/bthome_mithermometer/__init__.py
+++ b/esphome/components/bthome_mithermometer/__init__.py
@@ -3,6 +3,8 @@ from esphome.components import ble_device_base
 import esphome.config_validation as cv
 from esphome.const import CONF_BINDKEY, CONF_ID, CONF_MAC_ADDRESS
 from esphome.core import HexInt
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@nagyrobi"]
 AUTO_LOAD = ["ble_device_base"]
@@ -14,7 +16,9 @@ BTHomeMiThermometer = bthome_mithermometer_ns.class_(
 )
 
 
-def bthome_mithermometer_base_schema(extra_schema=None):
+def bthome_mithermometer_base_schema(
+    extra_schema: cv.Schema | dict | None = None,
+) -> cv.All:
     if extra_schema is None:
         extra_schema = {}
     return cv.All(
@@ -32,7 +36,7 @@ def bthome_mithermometer_base_schema(extra_schema=None):
     )
 
 
-async def setup_bthome_mithermometer(var, config):
+async def setup_bthome_mithermometer(var: MockObj, config: ConfigType) -> None:
     await cg.register_component(var, config)
     await ble_device_base.register_ble_device(var, config)
     cg.add(var.set_address(config[CONF_MAC_ADDRESS].as_hex))
diff --git a/esphome/components/bthome_mithermometer/sensor.py b/esphome/components/bthome_mithermometer/sensor.py
index 02551391ad..f559d0aa9b 100644
--- a/esphome/components/bthome_mithermometer/sensor.py
+++ b/esphome/components/bthome_mithermometer/sensor.py
@@ -20,6 +20,7 @@ from esphome.const import (
     UNIT_PERCENT,
     UNIT_VOLT,
 )
+from esphome.types import ConfigType
 
 from . import bthome_mithermometer_base_schema, setup_bthome_mithermometer
 
@@ -67,7 +68,7 @@ CONFIG_SCHEMA = bthome_mithermometer_base_schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await setup_bthome_mithermometer(var, config)
 
diff --git a/esphome/components/button/__init__.py b/esphome/components/button/__init__.py
index a4245f43e6..ee24002b8a 100644
--- a/esphome/components/button/__init__.py
+++ b/esphome/components/button/__init__.py
@@ -16,14 +16,15 @@ from esphome.const import (
     DEVICE_CLASS_RESTART,
     DEVICE_CLASS_UPDATE,
 )
-from esphome.core import CORE, CoroPriority, coroutine_with_priority
+from esphome.core import CORE, ID, CoroPriority, coroutine_with_priority
 from esphome.core.entity_helpers import (
     entity_duplicate_validator,
     queue_entity_register,
     setup_device_class,
     setup_entity,
 )
-from esphome.cpp_generator import MockObjClass
+from esphome.cpp_generator import MockObj, MockObjClass, TemplateArgsType
+from esphome.types import ConfigType, SafeExpType
 
 CODEOWNERS = ["@esphome/core"]
 IS_PLATFORM_COMPONENT = True
@@ -88,7 +89,7 @@ _CALLBACK_AUTOMATIONS = (
 
 
 @setup_entity("button")
-async def setup_button_core_(var, config):
+async def setup_button_core_(var: MockObj, config: ConfigType) -> None:
     await automation.build_callback_automations(var, config, _CALLBACK_AUTOMATIONS)
 
     setup_device_class(config)
@@ -101,7 +102,7 @@ async def setup_button_core_(var, config):
         await web_server.add_entity_config(var, web_server_config)
 
 
-async def register_button(var, config):
+async def register_button(var: MockObj, config: ConfigType) -> None:
     if not CORE.has_id(config[CONF_ID]):
         var = cg.Pvariable(config[CONF_ID], var)
     queue_entity_register("button", config)
@@ -109,7 +110,7 @@ async def register_button(var, config):
     await setup_button_core_(var, config)
 
 
-async def new_button(config, *args):
+async def new_button(config: ConfigType, *args: SafeExpType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID], *args)
     await register_button(var, config)
     return var
@@ -125,11 +126,16 @@ BUTTON_PRESS_SCHEMA = maybe_simple_id(
 @automation.register_action(
     "button.press", PressAction, BUTTON_PRESS_SCHEMA, synchronous=True
 )
-async def button_press_to_code(config, action_id, template_arg, args):
+async def button_press_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
 
 
 @coroutine_with_priority(CoroPriority.CORE)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_global(button_ns.using)
diff --git a/esphome/components/canbus/__init__.py b/esphome/components/canbus/__init__.py
index fcd342ad38..b7de235dd1 100644
--- a/esphome/components/canbus/__init__.py
+++ b/esphome/components/canbus/__init__.py
@@ -1,10 +1,13 @@
 import re
+from typing import Any
 
 from esphome import automation
 import esphome.codegen as cg
 import esphome.config_validation as cv
 from esphome.const import CONF_DATA, CONF_ID, CONF_TRIGGER_ID
 from esphome.core import CORE, ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@mvturnho", "@danielschramm"]
 IS_PLATFORM_COMPONENT = True
@@ -18,7 +21,7 @@ CONF_BIT_RATE = "bit_rate"
 CONF_ON_FRAME = "on_frame"
 
 
-def validate_id(config):
+def validate_id(config: ConfigType) -> ConfigType:
     if CONF_CAN_ID in config:
         can_id = config[CONF_CAN_ID]
         id_ext = config[CONF_USE_EXTENDED_ID]
@@ -27,7 +30,7 @@ def validate_id(config):
     return config
 
 
-def validate_raw_data(value):
+def validate_raw_data(value: Any) -> bytes | list:
     if isinstance(value, str):
         return value.encode("utf-8")
     if isinstance(value, list):
@@ -71,7 +74,7 @@ CAN_SPEEDS = {
 }
 
 
-def get_rate(value):
+def get_rate(value: str) -> int:
     match = re.match(r"(\d+)(?:K(\d+)?)?BPS", value, re.IGNORECASE)
     if not match:
         raise ValueError(f"Invalid rate format: {value}")
@@ -103,7 +106,7 @@ CANBUS_SCHEMA = cv.Schema(
 CANBUS_SCHEMA.add_extra(validate_id)
 
 
-async def setup_canbus_core_(var, config):
+async def setup_canbus_core_(var: MockObj, config: ConfigType) -> None:
     await cg.register_component(var, config)
     cg.add(var.set_can_id([config[CONF_CAN_ID]]))
     cg.add(var.set_use_extended_id([config[CONF_USE_EXTENDED_ID]]))
@@ -134,7 +137,7 @@ async def setup_canbus_core_(var, config):
         )
 
 
-async def register_canbus(var, config):
+async def register_canbus(var: MockObj, config: ConfigType) -> None:
     if not CORE.has_id(config[CONF_ID]):
         var = cg.new_Pvariable(config[CONF_ID], var)
     await setup_canbus_core_(var, config)
@@ -157,7 +160,12 @@ async def register_canbus(var, config):
     ),
     synchronous=True,
 )
-async def canbus_action_to_code(config, action_id, template_arg, args):
+async def canbus_action_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_CANBUS_ID])
 
diff --git a/esphome/components/captive_portal/captive_portal.cpp b/esphome/components/captive_portal/captive_portal.cpp
index 704a61d4de..ffd121499b 100644
--- a/esphome/components/captive_portal/captive_portal.cpp
+++ b/esphome/components/captive_portal/captive_portal.cpp
@@ -6,6 +6,7 @@
 #include "esphome/core/string_ref.h"
 #include "esphome/components/wifi/wifi_component.h"
 #include "captive_index.h"
+#include "scan_list.h"
 
 namespace esphome::captive_portal {
 
@@ -33,8 +34,10 @@ void CaptivePortal::handle_config(AsyncWebServerRequest *request) {
     // Invariant: only bounded in-memory work under the lock; the network send
     // happens later in request->send()
     wifi::ScanResultsLock lock(wifi::global_wifi_component);
-    for (const auto &scan : wifi::global_wifi_component->get_scan_result()) {
-      if (scan.get_is_hidden())
+    const auto &results = wifi::global_wifi_component->get_scan_result();
+    for (const auto &scan : results) {
+      bool with_auth = false;
+      if (!should_show_scan_entry(results, scan, with_auth))
         continue;
 
       json_escape_into_buffer(escaped_ssid, scan.get_ssid());
@@ -44,10 +47,10 @@ void CaptivePortal::handle_config(AsyncWebServerRequest *request) {
       stream->print(ESPHOME_F("\",\"rssi\":"));
       stream->print(scan.get_rssi());
       stream->print(ESPHOME_F(",\"lock\":"));
-      stream->print(scan.get_with_auth());
+      stream->print(with_auth);
       stream->print(ESPHOME_F("}"));
 #else
-      stream->printf(R"(,{"ssid":"%s","rssi":%d,"lock":%d})", escaped_ssid, scan.get_rssi(), scan.get_with_auth());
+      stream->printf(R"(,{"ssid":"%s","rssi":%d,"lock":%d})", escaped_ssid, scan.get_rssi(), with_auth);
 #endif
     }
   }
diff --git a/esphome/components/captive_portal/scan_list.h b/esphome/components/captive_portal/scan_list.h
new file mode 100644
index 0000000000..d24a88a670
--- /dev/null
+++ b/esphome/components/captive_portal/scan_list.h
@@ -0,0 +1,28 @@
+#pragma once
+#include <cstdint>
+
+namespace esphome::captive_portal {
+
+// A scan lists every BSSID, so one SSID can appear several times. Returns true for
+// the strongest entry per SSID (earliest on ties), never for hidden entries. scan
+// must be an element of results. with_auth is written only when returning true and
+// is set if any entry with that SSID needs a key. Templated for host tests.
+template<typename Results, typename Entry>
+bool should_show_scan_entry(const Results &results, const Entry &scan, bool &with_auth) {
+  if (scan.get_is_hidden())
+    return false;
+  const int8_t rssi = scan.get_rssi();
+  bool any_auth = false;
+  for (const auto &other : results) {
+    if (other.get_is_hidden() || !other.ssid_equals(scan))
+      continue;
+    // Same array, so address order is index order. scan fails both checks against itself.
+    if (other.get_rssi() > rssi || (other.get_rssi() == rssi && &other < &scan))
+      return false;
+    any_auth |= other.get_with_auth();
+  }
+  with_auth = any_auth;
+  return true;
+}
+
+}  // namespace esphome::captive_portal
diff --git a/esphome/components/climate/__init__.py b/esphome/components/climate/__init__.py
index fe050fca22..80dd913fba 100644
--- a/esphome/components/climate/__init__.py
+++ b/esphome/components/climate/__init__.py
@@ -1,3 +1,5 @@
+from typing import Any
+
 from esphome import automation
 import esphome.codegen as cg
 from esphome.components import mqtt, web_server
@@ -48,13 +50,19 @@ from esphome.const import (
     CONF_VISUAL,
     CONF_WEB_SERVER,
 )
-from esphome.core import CORE, CoroPriority, Lambda, coroutine_with_priority
+from esphome.core import CORE, ID, CoroPriority, Lambda, coroutine_with_priority
 from esphome.core.entity_helpers import (
     entity_duplicate_validator,
     queue_entity_register,
     setup_entity,
 )
-from esphome.cpp_generator import LambdaExpression, MockObjClass
+from esphome.cpp_generator import (
+    LambdaExpression,
+    MockObj,
+    MockObjClass,
+    TemplateArgsType,
+)
+from esphome.types import ConfigType, SafeExpType
 
 IS_PLATFORM_COMPONENT = True
 
@@ -132,7 +140,7 @@ VISUAL_TEMPERATURE_STEP_SCHEMA = cv.Schema(
 )
 
 
-def visual_temperature_step(value):
+def visual_temperature_step(value: Any) -> ConfigType:
     # Allow defining target/current temperature steps separately
     if isinstance(value, dict):
         return VISUAL_TEMPERATURE_STEP_SCHEMA(value)
@@ -273,7 +281,7 @@ def climate_schema(
 
 
 @setup_entity("climate")
-async def setup_climate_core_(var, config):
+async def setup_climate_core_(var: MockObj, config: ConfigType) -> None:
     visual = config.get(CONF_VISUAL, {})
     if (min_temp := visual.get(CONF_MIN_TEMPERATURE)) is not None:
         cg.add_define("USE_CLIMATE_VISUAL_OVERRIDES")
@@ -443,7 +451,7 @@ async def setup_climate_core_(var, config):
         await web_server.add_entity_config(var, web_server_config)
 
 
-async def register_climate(var, config):
+async def register_climate(var: MockObj, config: ConfigType) -> None:
     if not CORE.has_id(config[CONF_ID]):
         var = cg.Pvariable(config[CONF_ID], var)
     queue_entity_register("climate", config)
@@ -451,7 +459,7 @@ async def register_climate(var, config):
     await setup_climate_core_(var, config)
 
 
-async def new_climate(config, *args):
+async def new_climate(config: ConfigType, *args: SafeExpType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID], *args)
     await register_climate(var, config)
     return var
@@ -485,7 +493,12 @@ CLIMATE_CONTROL_ACTION_SCHEMA = cv.Schema(
     CLIMATE_CONTROL_ACTION_SCHEMA,
     synchronous=True,
 )
-async def climate_control_to_code(config, action_id, template_arg, args):
+async def climate_control_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
 
     # All configured fields are folded into a single stateless lambda whose
@@ -549,5 +562,5 @@ async def climate_control_to_code(config, action_id, template_arg, args):
 
 
 @coroutine_with_priority(CoroPriority.CORE)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_global(climate_ns.using)
diff --git a/esphome/components/color/__init__.py b/esphome/components/color/__init__.py
index c39c5924af..70240eff07 100644
--- a/esphome/components/color/__init__.py
+++ b/esphome/components/color/__init__.py
@@ -1,5 +1,8 @@
+from typing import Any
+
 from esphome import codegen as cg, config_validation as cv
 from esphome.const import CONF_BLUE, CONF_GREEN, CONF_ID, CONF_RED, CONF_WHITE
+from esphome.types import ConfigType
 
 ColorStruct = cg.esphome_ns.struct("Color")
 
@@ -14,7 +17,7 @@ CONF_WHITE_INT = "white_int"
 CONF_HEX = "hex"
 
 
-def hex_color(value):
+def hex_color(value: Any) -> tuple[int, int, int]:
     if isinstance(value, int):
         value = str(value)
     if not isinstance(value, str):
@@ -39,7 +42,7 @@ components = {
 }
 
 
-def validate_color(config):
+def validate_color(config: ConfigType) -> ConfigType:
     has_components = set(config) & components
     has_hex = CONF_HEX in config
     if has_hex and has_components:
@@ -68,7 +71,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-def from_rgbw(config):
+def from_rgbw(config: ConfigType) -> tuple[int, int, int, int]:
     r = 0
     if CONF_RED in config:
         r = int(config[CONF_RED] * 255)
@@ -96,7 +99,7 @@ def from_rgbw(config):
     return (r, g, b, w)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     if CONF_HEX in config:
         r, g, b = config[CONF_HEX]
         w = 0
diff --git a/esphome/components/cover/__init__.py b/esphome/components/cover/__init__.py
index 7639e15334..011b2c2f04 100644
--- a/esphome/components/cover/__init__.py
+++ b/esphome/components/cover/__init__.py
@@ -46,7 +46,7 @@ from esphome.core.entity_helpers import (
     setup_entity,
 )
 from esphome.cpp_generator import LambdaExpression, MockObj, MockObjClass
-from esphome.types import ConfigType, TemplateArgsType
+from esphome.types import ConfigType, SafeExpType, TemplateArgsType
 
 IS_PLATFORM_COMPONENT = True
 
@@ -162,7 +162,7 @@ _COVER_SCHEMA = (
 _COVER_SCHEMA.add_extra(entity_duplicate_validator("cover"))
 
 
-def _validate_mqtt_state_topics(config):
+def _validate_mqtt_state_topics(config: ConfigType) -> ConfigType:
     if config.get(CONF_MQTT_JSON_STATE_PAYLOAD):
         if CONF_POSITION_STATE_TOPIC in config:
             raise cv.Invalid(
@@ -201,7 +201,7 @@ def cover_schema(
 
 
 @setup_entity("cover")
-async def setup_cover_core_(var, config):
+async def setup_cover_core_(var: MockObj, config: ConfigType) -> None:
     setup_device_class(config)
 
     if CONF_ON_OPEN in config:
@@ -235,7 +235,7 @@ async def setup_cover_core_(var, config):
         await web_server.add_entity_config(var, web_server_config)
 
 
-async def register_cover(var, config):
+async def register_cover(var: MockObj, config: ConfigType) -> None:
     if not CORE.has_id(config[CONF_ID]):
         var = cg.Pvariable(config[CONF_ID], var)
     queue_entity_register("cover", config)
@@ -243,7 +243,7 @@ async def register_cover(var, config):
     await setup_cover_core_(var, config)
 
 
-async def new_cover(config, *args):
+async def new_cover(config: ConfigType, *args: SafeExpType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID], *args)
     await register_cover(var, config)
     return var
@@ -259,7 +259,12 @@ COVER_ACTION_SCHEMA = maybe_simple_id(
 @automation.register_action(
     "cover.open", OpenAction, COVER_ACTION_SCHEMA, synchronous=True
 )
-async def cover_open_to_code(config, action_id, template_arg, args):
+async def cover_open_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
 
@@ -267,7 +272,12 @@ async def cover_open_to_code(config, action_id, template_arg, args):
 @automation.register_action(
     "cover.close", CloseAction, COVER_ACTION_SCHEMA, synchronous=True
 )
-async def cover_close_to_code(config, action_id, template_arg, args):
+async def cover_close_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
 
@@ -275,7 +285,12 @@ async def cover_close_to_code(config, action_id, template_arg, args):
 @automation.register_action(
     "cover.stop", StopAction, COVER_ACTION_SCHEMA, synchronous=True
 )
-async def cover_stop_to_code(config, action_id, template_arg, args):
+async def cover_stop_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
 
@@ -283,7 +298,12 @@ async def cover_stop_to_code(config, action_id, template_arg, args):
 @automation.register_action(
     "cover.toggle", ToggleAction, COVER_ACTION_SCHEMA, synchronous=True
 )
-async def cover_toggle_to_code(config, action_id, template_arg, args):
+async def cover_toggle_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
 
@@ -421,5 +441,5 @@ automation.register_condition(
 
 
 @coroutine_with_priority(CoroPriority.CORE)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_global(cover_ns.using)
diff --git a/esphome/components/cs5460a/sensor.py b/esphome/components/cs5460a/sensor.py
index 0c6ae0d821..5f14457101 100644
--- a/esphome/components/cs5460a/sensor.py
+++ b/esphome/components/cs5460a/sensor.py
@@ -17,6 +17,9 @@ from esphome.const import (
     UNIT_VOLT,
     UNIT_WATT,
 )
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@balrog-kun"]
 DEPENDENCIES = ["spi"]
@@ -40,7 +43,7 @@ CONF_VOLTAGE_HPF = "voltage_hpf"
 CONF_PULSE_ENERGY = "pulse_energy"
 
 
-def validate_config(config):
+def validate_config(config: ConfigType) -> ConfigType:
     current_gain = abs(config[CONF_CURRENT_GAIN]) * (
         1.0 if config[CONF_PGA_GAIN] == "10X" else 5.0
     )
@@ -105,7 +108,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await spi.register_spi_device(var, config)
@@ -138,6 +141,11 @@ async def to_code(config):
     ),
     synchronous=True,
 )
-async def restart_action_to_code(config, action_id, template_arg, args):
+async def restart_action_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
diff --git a/esphome/components/daly_bms/__init__.py b/esphome/components/daly_bms/__init__.py
index 87f00ce507..ba0be4d3a5 100644
--- a/esphome/components/daly_bms/__init__.py
+++ b/esphome/components/daly_bms/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import uart
 import esphome.config_validation as cv
 from esphome.const import CONF_ADDRESS, CONF_ID
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@s1lvi0"]
 MULTI_CONF = True
@@ -26,7 +27,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await uart.register_uart_device(var, config)
diff --git a/esphome/components/daly_bms/binary_sensor.py b/esphome/components/daly_bms/binary_sensor.py
index 95a2ae3b44..2b6ceffff1 100644
--- a/esphome/components/daly_bms/binary_sensor.py
+++ b/esphome/components/daly_bms/binary_sensor.py
@@ -1,6 +1,8 @@
 import esphome.codegen as cg
 from esphome.components import binary_sensor
 import esphome.config_validation as cv
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 from . import CONF_BMS_DALY_ID, DalyBmsComponent
 
@@ -27,13 +29,13 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def setup_conf(config, key, hub):
+async def setup_conf(config: ConfigType, key: str, hub: MockObj) -> None:
     if sensor_config := config.get(key):
         var = await binary_sensor.new_binary_sensor(sensor_config)
         cg.add(getattr(hub, f"set_{key}_binary_sensor")(var))
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_BMS_DALY_ID])
     for key in TYPES:
         await setup_conf(config, key, hub)
diff --git a/esphome/components/daly_bms/sensor.py b/esphome/components/daly_bms/sensor.py
index aa92cfa86a..3e91fb280a 100644
--- a/esphome/components/daly_bms/sensor.py
+++ b/esphome/components/daly_bms/sensor.py
@@ -23,6 +23,8 @@ from esphome.const import (
     UNIT_PERCENT,
     UNIT_VOLT,
 )
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 from . import CONF_BMS_DALY_ID, DalyBmsComponent
 
@@ -222,13 +224,13 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def setup_conf(config, key, hub):
+async def setup_conf(config: ConfigType, key: str, hub: MockObj) -> None:
     if sensor_config := config.get(key):
         sens = await sensor.new_sensor(sensor_config)
         cg.add(getattr(hub, f"set_{key}_sensor")(sens))
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_BMS_DALY_ID])
     for key in TYPES:
         await setup_conf(config, key, hub)
diff --git a/esphome/components/daly_bms/text_sensor.py b/esphome/components/daly_bms/text_sensor.py
index 9f4e2df85a..1a91081bbf 100644
--- a/esphome/components/daly_bms/text_sensor.py
+++ b/esphome/components/daly_bms/text_sensor.py
@@ -2,6 +2,8 @@ import esphome.codegen as cg
 from esphome.components import text_sensor
 import esphome.config_validation as cv
 from esphome.const import CONF_STATUS
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 from . import CONF_BMS_DALY_ID, DalyBmsComponent
 
@@ -23,13 +25,13 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def setup_conf(config, key, hub):
+async def setup_conf(config: ConfigType, key: str, hub: MockObj) -> None:
     if sensor_config := config.get(key):
         sens = await text_sensor.new_text_sensor(sensor_config)
         cg.add(getattr(hub, f"set_{key}_text_sensor")(sens))
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_BMS_DALY_ID])
     for key in TYPES:
         await setup_conf(config, key, hub)
diff --git a/esphome/components/dashboard_import/__init__.py b/esphome/components/dashboard_import/__init__.py
index 31559a514c..c27669d77e 100644
--- a/esphome/components/dashboard_import/__init__.py
+++ b/esphome/components/dashboard_import/__init__.py
@@ -2,6 +2,7 @@ import base64
 from pathlib import Path
 import re
 import secrets
+from typing import Any
 
 import requests
 from ruamel.yaml import YAML
@@ -13,6 +14,7 @@ import esphome.config_validation as cv
 from esphome.const import CONF_ESPHOME, CONF_PROJECT, CONF_REF, CONF_WIFI
 import esphome.final_validate as fv
 from esphome.happy_eyeballs import ensure_happy_eyeballs
+from esphome.types import ConfigType
 from esphome.yaml_util import dump
 
 dashboard_import_ns = cg.esphome_ns.namespace("dashboard_import")
@@ -23,14 +25,14 @@ DEPENDENCIES = ["api"]
 CODEOWNERS = ["@esphome/core"]
 
 
-def validate_import_url(value):
+def validate_import_url(value: Any) -> str:
     value = cv.string_strict(value)
     value = cv.Length(max=255)(value)
     validate_source_shorthand(value)
     return value
 
 
-def validate_full_url(config):
+def validate_full_url(config: ConfigType) -> ConfigType:
     if not config[CONF_IMPORT_FULL_CONFIG]:
         return config
     source = validate_source_shorthand(config[CONF_PACKAGE_IMPORT_URL])
@@ -55,7 +57,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-def _final_validate(config):
+def _final_validate(config: ConfigType) -> None:
     full_config = fv.full_config.get()[CONF_ESPHOME]
     if CONF_PROJECT not in full_config:
         raise cv.Invalid(
@@ -73,7 +75,7 @@ wifi:
 """
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_define("USE_DASHBOARD_IMPORT")
     url = config[CONF_PACKAGE_IMPORT_URL]
     if config[CONF_IMPORT_FULL_CONFIG]:
diff --git a/esphome/components/debug/__init__.py b/esphome/components/debug/__init__.py
index 3e94d04f21..a889d13329 100644
--- a/esphome/components/debug/__init__.py
+++ b/esphome/components/debug/__init__.py
@@ -12,6 +12,7 @@ from esphome.const import (
     PlatformFramework,
 )
 from esphome.core import CORE
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@esphome/core"]
 DEPENDENCIES = ["logger"]
@@ -45,7 +46,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     if CORE.using_zephyr:
         zephyr_add_prj_conf("HWINFO", True)
         # gdb thread support
diff --git a/esphome/components/debug/sensor.py b/esphome/components/debug/sensor.py
index a018ce5c3b..72e2efebc2 100644
--- a/esphome/components/debug/sensor.py
+++ b/esphome/components/debug/sensor.py
@@ -21,6 +21,7 @@ from esphome.const import (
     UNIT_MILLISECOND,
     UNIT_PERCENT,
 )
+from esphome.types import ConfigType
 
 from . import (  # noqa: F401  pylint: disable=unused-import
     CONF_DEBUG_ID,
@@ -111,7 +112,7 @@ CONFIG_SCHEMA = {
 }
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     debug_component = await cg.get_variable(config[CONF_DEBUG_ID])
 
     if free_conf := config.get(CONF_FREE):
diff --git a/esphome/components/debug/text_sensor.py b/esphome/components/debug/text_sensor.py
index c69b8d9461..9d4fcc1b42 100644
--- a/esphome/components/debug/text_sensor.py
+++ b/esphome/components/debug/text_sensor.py
@@ -7,6 +7,7 @@ from esphome.const import (
     ICON_CHIP,
     ICON_RESTART,
 )
+from esphome.types import ConfigType
 
 from . import (  # noqa: F401  pylint: disable=unused-import
     CONF_DEBUG_ID,
@@ -33,7 +34,7 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     debug_component = await cg.get_variable(config[CONF_DEBUG_ID])
 
     if CONF_DEVICE in config:
diff --git a/esphome/components/deep_sleep/__init__.py b/esphome/components/deep_sleep/__init__.py
index 3b70f947d2..dc03708645 100644
--- a/esphome/components/deep_sleep/__init__.py
+++ b/esphome/components/deep_sleep/__init__.py
@@ -38,7 +38,8 @@ from esphome.const import (
     PLATFORM_NRF52,
     PlatformFramework,
 )
-from esphome.core import CORE
+from esphome.core import CORE, ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
 from esphome.types import ConfigType
 
 WAKEUP_PINS = {
@@ -162,6 +163,11 @@ def validate_config(config: ConfigType) -> ConfigType:
                     "You need to remove the global wakeup_pin_mode and define it per pin"
                 )
             if wakeup_pins:
+                if CONF_WAKEUP_PIN_MODE in wakeup_pins[0]:
+                    raise cv.Invalid(
+                        "Specify wakeup_pin_mode either at the top level under deep_sleep "
+                        "or under the pin entry, not both"
+                    )
                 wakeup_pins[0][CONF_WAKEUP_PIN_MODE] = config.pop(CONF_WAKEUP_PIN_MODE)
     elif (
         isinstance(config.get(CONF_WAKEUP_PIN), list)
@@ -174,7 +180,7 @@ def validate_config(config: ConfigType) -> ConfigType:
     return config
 
 
-def _validate_ex1_wakeup_mode(value):
+def _validate_ex1_wakeup_mode(value: str) -> str:
     if value == "ALL_LOW":
         esp32.only_on_variant(supported=[VARIANT_ESP32], msg_prefix="ALL_LOW")(value)
     if value == "ANY_LOW":
@@ -345,7 +351,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
 
@@ -458,7 +464,12 @@ DEEP_SLEEP_ENTER_SCHEMA = cv.All(
     DEEP_SLEEP_ENTER_SCHEMA,
     synchronous=True,
 )
-async def deep_sleep_enter_to_code(config, action_id, template_arg, args):
+async def deep_sleep_enter_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, paren)
     if CONF_SLEEP_DURATION in config:
@@ -487,7 +498,12 @@ async def deep_sleep_enter_to_code(config, action_id, template_arg, args):
     automation.maybe_simple_id(DEEP_SLEEP_ACTION_SCHEMA),
     synchronous=True,
 )
-async def deep_sleep_action_to_code(config, action_id, template_arg, args):
+async def deep_sleep_action_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     return var
diff --git a/esphome/components/ds1307/time.py b/esphome/components/ds1307/time.py
index 0e7bb976a2..a3ae3eb5af 100644
--- a/esphome/components/ds1307/time.py
+++ b/esphome/components/ds1307/time.py
@@ -3,6 +3,9 @@ import esphome.codegen as cg
 from esphome.components import i2c, time
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@badbadc0ffee"]
 DEPENDENCIES = ["i2c"]
@@ -29,7 +32,12 @@ CONFIG_SCHEMA = time.TIME_SCHEMA.extend(
     ),
     synchronous=True,
 )
-async def ds1307_write_time_to_code(config, action_id, template_arg, args):
+async def ds1307_write_time_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     return var
@@ -45,13 +53,18 @@ async def ds1307_write_time_to_code(config, action_id, template_arg, args):
     ),
     synchronous=True,
 )
-async def ds1307_read_time_to_code(config, action_id, template_arg, args):
+async def ds1307_read_time_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     return var
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
 
     await cg.register_component(var, config)
diff --git a/esphome/components/ds248x/__init__.py b/esphome/components/ds248x/__init__.py
index 5a26ceab50..a2e2a87ed0 100644
--- a/esphome/components/ds248x/__init__.py
+++ b/esphome/components/ds248x/__init__.py
@@ -3,6 +3,7 @@ import esphome.codegen as cg
 from esphome.components import i2c
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_SLEEP_PIN, CONF_TYPE
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@tomwellnitz"]
 MULTI_CONF = True
@@ -35,7 +36,7 @@ ds248x_ns = cg.esphome_ns.namespace("ds248x")
 DS248xComponent = ds248x_ns.class_("DS248xComponent", cg.Component, i2c.I2CDevice)
 
 
-def _component_schema(*extras):
+def _component_schema(*extras: dict) -> cv.Schema:
     schema = cv.Schema(
         {
             cv.GenerateID(): cv.declare_id(DS248xComponent),
@@ -79,11 +80,11 @@ CONFIG_SCHEMA = cv.typed_schema(
 )
 
 
-def get_channel_count(config):
+def get_channel_count(config: ConfigType) -> int:
     return CHANNEL_COUNTS[config[CONF_TYPE]]
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
diff --git a/esphome/components/ds248x/one_wire.py b/esphome/components/ds248x/one_wire.py
index 19861eae36..b028958132 100644
--- a/esphome/components/ds248x/one_wire.py
+++ b/esphome/components/ds248x/one_wire.py
@@ -12,6 +12,7 @@ import esphome.codegen as cg
 from esphome.components.one_wire import OneWireBus
 import esphome.config_validation as cv
 from esphome.const import CONF_CHANNEL, CONF_ID
+from esphome.types import ConfigType
 
 from . import CONF_DS248X_ID, DS248xComponent, ds248x_ns, get_channel_count
 
@@ -29,7 +30,7 @@ CONFIG_SCHEMA = cv.Schema(
 ).extend(cv.COMPONENT_SCHEMA)
 
 
-def _final_validate(config):
+def _final_validate(config: ConfigType) -> None:
     """Validate that the channel is within the parent's channel count."""
     fconf = fv.full_config.get()
     path = fconf.get_path_for_id(config[CONF_DS248X_ID])[:-1]
@@ -47,7 +48,7 @@ def _final_validate(config):
 FINAL_VALIDATE_SCHEMA = _final_validate
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
 
diff --git a/esphome/components/emc2101/__init__.py b/esphome/components/emc2101/__init__.py
index 323195e99a..639847345f 100644
--- a/esphome/components/emc2101/__init__.py
+++ b/esphome/components/emc2101/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import i2c
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_INVERTED, CONF_RESOLUTION
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@ellull"]
 
@@ -68,7 +69,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
diff --git a/esphome/components/emc2101/output/__init__.py b/esphome/components/emc2101/output/__init__.py
index 586f0800a6..a8820345e2 100644
--- a/esphome/components/emc2101/output/__init__.py
+++ b/esphome/components/emc2101/output/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import output
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.types import ConfigType
 
 from .. import CONF_EMC2101_ID, EMC2101_COMPONENT_SCHEMA, emc2101_ns
 
@@ -16,7 +17,7 @@ CONFIG_SCHEMA = EMC2101_COMPONENT_SCHEMA.extend(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     paren = await cg.get_variable(config[CONF_EMC2101_ID])
     var = cg.new_Pvariable(config[CONF_ID], paren)
     await output.register_output(var, config)
diff --git a/esphome/components/emc2101/sensor/__init__.py b/esphome/components/emc2101/sensor/__init__.py
index b6a2c8a333..cc8901cf38 100644
--- a/esphome/components/emc2101/sensor/__init__.py
+++ b/esphome/components/emc2101/sensor/__init__.py
@@ -13,6 +13,7 @@ from esphome.const import (
     UNIT_PERCENT,
     UNIT_REVOLUTIONS_PER_MINUTE,
 )
+from esphome.types import ConfigType
 
 from .. import CONF_EMC2101_ID, EMC2101_COMPONENT_SCHEMA, emc2101_ns
 
@@ -53,7 +54,7 @@ CONFIG_SCHEMA = EMC2101_COMPONENT_SCHEMA.extend(
 ).extend(cv.polling_component_schema("60s"))
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     paren = await cg.get_variable(config[CONF_EMC2101_ID])
     var = cg.new_Pvariable(config[CONF_ID], paren)
     await cg.register_component(var, config)
diff --git a/esphome/components/emontx/__init__.py b/esphome/components/emontx/__init__.py
index 3f83578926..7dde794f0b 100644
--- a/esphome/components/emontx/__init__.py
+++ b/esphome/components/emontx/__init__.py
@@ -11,7 +11,8 @@ from esphome.const import (
     CONF_RX_BUFFER_SIZE,
     CONF_UART_ID,
 )
-from esphome.core import CORE
+from esphome.core import CORE, ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
 import esphome.final_validate as fv
 from esphome.types import ConfigType
 
@@ -143,8 +144,11 @@ EMONTX_SEND_COMMAND_ACTION_SCHEMA = cv.Schema(
     synchronous=True,
 )
 async def emontx_send_command_action_to_code(
-    config: ConfigType, action_id, template_arg, args
-) -> None:
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     template_ = await cg.templatable(config[CONF_COMMAND], args, cg.std_string)
diff --git a/esphome/components/emontx/sensor/__init__.py b/esphome/components/emontx/sensor/__init__.py
index 83a972c5e0..967bc4e699 100644
--- a/esphome/components/emontx/sensor/__init__.py
+++ b/esphome/components/emontx/sensor/__init__.py
@@ -68,6 +68,7 @@ PATTERN_CONFIGS = {
     "PULSE": {
         CONF_UNIT_OF_MEASUREMENT: UNIT_PULSES,
         CONF_DEVICE_CLASS: DEVICE_CLASS_ENERGY,
+        CONF_STATE_CLASS: STATE_CLASS_TOTAL_INCREASING,
         CONF_ACCURACY_DECIMALS: 0,
     },
     "PF": {
@@ -78,12 +79,13 @@ PATTERN_CONFIGS = {
     },
 }
 
-# Create a base schema that's flexible for any tag
-BASE_SCHEMA = sensor.sensor_schema(
-    EmonTxSensor,
-    state_class=STATE_CLASS_MEASUREMENT,
-    accuracy_decimals=0,
-).extend(
+# BASE_SCHEMA intentionally omits state_class and accuracy_decimals defaults.
+# Passing them to sensor_schema() would register them via cv.Optional(key, default=...),
+# making them always present in the validated config dict and preventing
+# apply_tag_defaults from overriding them with the correct per-prefix values.
+# They are injected by apply_tag_defaults below, after running through
+# sensor.validate_state_class() so the value is code-generation-ready.
+BASE_SCHEMA = sensor.sensor_schema(EmonTxSensor).extend(
     {
         cv.GenerateID(CONF_EMONTX_ID): cv.use_id(EmonTx),
         cv.Required(CONF_TAG_NAME): cv.string,
@@ -91,34 +93,43 @@ BASE_SCHEMA = sensor.sensor_schema(
 )
 
 
+def _apply_defaults(config: ConfigType, defaults: dict) -> None:
+    """Inject defaults into config, skipping keys already set by the user.
+    state_class values are run through validate_state_class so they are
+    code-generation-ready, matching what sensor_schema() would normally do."""
+    for key, value in defaults.items():
+        if key not in config:
+            if key == CONF_STATE_CLASS:
+                value = sensor.validate_state_class(value)
+            config[key] = value
+
+
 def apply_tag_defaults(config: ConfigType) -> ConfigType:
     """Apply defaults based on tag prefix if applicable, but don't restrict any tags."""
     tag = config[CONF_TAG_NAME]
 
-    # Skip if tag is too short
-    if len(tag) < 2:
-        return config
+    if len(tag) >= 2:
+        tag_upper = tag.upper()
 
-    # Check if this tag starts with a known prefix
-    tag_upper = tag.upper()
+        for pattern, pattern_config in PATTERN_CONFIGS.items():
+            if tag_upper.startswith(pattern):
+                _apply_defaults(config, pattern_config)
+                return config
 
-    for pattern, pattern_config in PATTERN_CONFIGS.items():
-        if tag_upper.startswith(pattern):
-            # Apply pattern defaults if not overridden by user
-            for key, value in pattern_config.items():
-                if key not in config:
-                    config[key] = value
+        # Only apply defaults for known prefixes with numeric indices (e.g. E1, V2, T3)
+        prefix = tag_upper[0]
+        if prefix in SENSOR_CONFIGS and tag[1:].isdigit():
+            _apply_defaults(config, SENSOR_CONFIGS[prefix])
             return config
 
-    # Only apply defaults for known prefixes with numeric indices
-    prefix = tag_upper[0]
-    if prefix in SENSOR_CONFIGS and len(tag) > 1 and tag[1:].isdigit():
-        # Apply defaults for known tag types, but only if not overridden by user
-        defaults = SENSOR_CONFIGS[prefix]
-        for key, value in defaults.items():
-            if key not in config:
-                config[key] = value
-
+    # Fall back to generic defaults for tags with no known prefix
+    _apply_defaults(
+        config,
+        {
+            CONF_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+            CONF_ACCURACY_DECIMALS: 0,
+        },
+    )
     return config
 
 
diff --git a/esphome/components/esp32_ble_tracker/__init__.py b/esphome/components/esp32_ble_tracker/__init__.py
index 28c8c7fcf1..4f6355df70 100644
--- a/esphome/components/esp32_ble_tracker/__init__.py
+++ b/esphome/components/esp32_ble_tracker/__init__.py
@@ -38,7 +38,8 @@ from esphome.const import (
     CONF_SERVICE_UUID,
     CONF_TRIGGER_ID,
 )
-from esphome.core import CORE, CoroPriority, TimePeriod, coroutine_with_priority
+from esphome.core import CORE, ID, CoroPriority, TimePeriod, coroutine_with_priority
+from esphome.cpp_generator import MockObj, TemplateArgsType
 from esphome.enum import StrEnum
 from esphome.types import ConfigType
 
@@ -262,7 +263,7 @@ ESP_BLE_DEVICE_SCHEMA = cv.Schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     # Register the loggers this component needs
     esp32_ble.register_bt_logger(BTLoggers.BLE_SCAN)
 
@@ -360,7 +361,7 @@ async def to_code(config):
 # chance to call register_ble_tracker and register_client before the list is checked
 # and added to the global defines list.
 @coroutine_with_priority(CoroPriority.FINAL)
-async def _add_ble_features():
+async def _add_ble_features() -> None:
     # Add feature-specific defines based on what's needed
     required_features = _get_required_features()
     # Sensors registered through the neutral ble_device_base path (BLEHub) need
@@ -389,8 +390,11 @@ ESP32_BLE_START_SCAN_ACTION_SCHEMA = cv.Schema(
     synchronous=True,
 )
 async def esp32_ble_tracker_start_scan_action_to_code(
-    config, action_id, template_arg, args
-):
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, paren)
     template_ = await cg.templatable(config[CONF_CONTINUOUS], args, cg.bool_)
@@ -414,8 +418,11 @@ ESP32_BLE_STOP_SCAN_ACTION_SCHEMA = automation.maybe_simple_id(
     synchronous=True,
 )
 async def esp32_ble_tracker_stop_scan_action_to_code(
-    config, action_id, template_arg, args
-):
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     return var
diff --git a/esphome/components/esp32_hosted/update/esp32_hosted_update.cpp b/esphome/components/esp32_hosted/update/esp32_hosted_update.cpp
index 351b0869b0..4eb5d1745b 100644
--- a/esphome/components/esp32_hosted/update/esp32_hosted_update.cpp
+++ b/esphome/components/esp32_hosted/update/esp32_hosted_update.cpp
@@ -135,6 +135,10 @@ void Esp32HostedUpdate::setup() {
   // Publish state
   this->status_clear_error();
   this->publish_state();
+  // Defer so the automation runs on the main loop after setup, not during App.setup()
+  if (this->state_ == update::UPDATE_STATE_AVAILABLE && this->update_available_trigger_) {
+    this->defer([this]() { this->update_available_trigger_->trigger(this->update_info_); });
+  }
 #else
   // HTTP mode: check every 10s until network is ready (max 6 attempts)
   // Only if update interval is > 1 minute to avoid redundant checks
@@ -185,6 +189,8 @@ void Esp32HostedUpdate::check() {
     return;
   }
 
+  const bool was_available = this->state_ == update::UPDATE_STATE_AVAILABLE;
+
   // Compare versions
   if (this->update_info_.latest_version.empty() ||
       this->update_info_.latest_version == this->update_info_.current_version) {
@@ -197,6 +203,9 @@ void Esp32HostedUpdate::check() {
   this->update_info_.progress = 0.0f;
   this->status_clear_error();
   this->publish_state();
+  if (this->state_ == update::UPDATE_STATE_AVAILABLE && !was_available && this->update_available_trigger_) {
+    this->update_available_trigger_->trigger(this->update_info_);
+  }
 #endif
 }
 
diff --git a/esphome/components/esp32_touch/__init__.py b/esphome/components/esp32_touch/__init__.py
index 10ad339b12..ede6beb9b6 100644
--- a/esphome/components/esp32_touch/__init__.py
+++ b/esphome/components/esp32_touch/__init__.py
@@ -1,4 +1,6 @@
+from collections.abc import Callable, Iterable
 import logging
+from typing import Any
 
 import esphome.codegen as cg
 from esphome.components import esp32
@@ -23,6 +25,7 @@ from esphome.const import (
     CONF_VOLTAGE_ATTENUATION,
 )
 from esphome.core import TimePeriod
+from esphome.types import ConfigType
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -181,7 +184,7 @@ EFFECTIVE_HIGH_VOLTAGE = {
 }
 
 
-def validate_touch_pad(value):
+def validate_touch_pad(value: Any) -> int:
     value = gpio.gpio_pin_number_validator(value)
     variant = get_esp32_variant()
     pads = TOUCH_PADS.get(variant)
@@ -192,7 +195,7 @@ def validate_touch_pad(value):
     return pads[value]  # Return integer channel ID
 
 
-def validate_variant_vars(config):
+def validate_variant_vars(config: ConfigType) -> ConfigType:
     variant = get_esp32_variant()
     invalid_vars = set()
     if variant == VARIANT_ESP32:
@@ -219,8 +222,8 @@ def validate_variant_vars(config):
     return config
 
 
-def validate_voltage(values):
-    def validator(value):
+def validate_voltage(values: Iterable[str]) -> Callable[[Any], str]:
+    def validator(value: Any) -> str:
         if isinstance(value, float) and value.is_integer():
             value = int(value)
         value = cv.string(value)
@@ -300,7 +303,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     # New unified touch sensor driver
     include_builtin_idf_component("esp_driver_touch_sens")
 
diff --git a/esphome/components/esp32_touch/binary_sensor.py b/esphome/components/esp32_touch/binary_sensor.py
index 75560d71b1..2489c2abc1 100644
--- a/esphome/components/esp32_touch/binary_sensor.py
+++ b/esphome/components/esp32_touch/binary_sensor.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import binary_sensor
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_PIN, CONF_THRESHOLD
+from esphome.types import ConfigType
 
 from . import ESP32TouchComponent, esp32_touch_ns, validate_touch_pad
 
@@ -24,7 +25,7 @@ CONFIG_SCHEMA = binary_sensor.binary_sensor_schema(ESP32TouchBinarySensor).exten
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_ESP32_TOUCH_ID])
     var = cg.new_Pvariable(
         config[CONF_ID],
diff --git a/esphome/components/esp8266/__init__.py b/esphome/components/esp8266/__init__.py
index b808234240..5c8bef7fca 100644
--- a/esphome/components/esp8266/__init__.py
+++ b/esphome/components/esp8266/__init__.py
@@ -3,6 +3,7 @@ from pathlib import Path
 import platform
 import re
 import subprocess
+from typing import Any
 
 import esphome.codegen as cg
 import esphome.config_validation as cv
@@ -31,6 +32,7 @@ from esphome.core import (
 from esphome.core.config import BOARD_MAX_LENGTH
 from esphome.helpers import IS_MACOS, copy_file_if_changed
 from esphome.platformio.toolchain import copy_ccache_script
+from esphome.storage_json import StorageJSON
 from esphome.types import ConfigType
 
 from .boards import BOARDS, ESP8266_LD_SCRIPTS
@@ -88,7 +90,7 @@ def lambdas_use_scanf_float(config: ConfigType) -> bool:
     return False
 
 
-def set_core_data(config):
+def set_core_data(config: ConfigType) -> ConfigType:
     CORE.data[KEY_ESP8266] = {}
     CORE.data[KEY_CORE][KEY_TARGET_PLATFORM] = PLATFORM_ESP8266
     CORE.data[KEY_CORE][KEY_TARGET_FRAMEWORK] = "arduino"
@@ -102,7 +104,7 @@ def set_core_data(config):
     return config
 
 
-def get_download_types(storage_json):
+def get_download_types(storage_json: StorageJSON) -> list[dict[str, str]]:
     """Binary-download entries for a built ESP8266 firmware.
 
     Used by device-builder (esphome/device-builder), via
@@ -166,7 +168,7 @@ ARDUINO_3_PLATFORM_VERSION = cv.Version(3, 2, 0)
 ARDUINO_4_PLATFORM_VERSION = cv.Version(4, 2, 1)
 
 
-def _arduino_check_versions(value):
+def _arduino_check_versions(value: ConfigType) -> ConfigType:
     value = value.copy()
     lookups = {
         "dev": (cv.Version(3, 1, 2), "https://github.com/esp8266/Arduino.git"),
@@ -209,7 +211,7 @@ def _arduino_check_versions(value):
     return value
 
 
-def _parse_platform_version(value):
+def _parse_platform_version(value: Any) -> str:
     try:
         # if platform version is a valid version constraint, prefix the default package
         cv.platformio_version_constraint(value)
@@ -287,7 +289,7 @@ def check_rosetta() -> None:
 
 
 @coroutine_with_priority(CoroPriority.PLATFORM)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add(esp8266_ns.setup_preferences())
 
     cg.add_platformio_option("lib_ldf_mode", "off")
@@ -516,7 +518,7 @@ ESP8266_EXCEPTION_CODES = {
 }
 
 
-def _decode_pc(config, addr):
+def _decode_pc(config: ConfigType, addr: str) -> None:
     from esphome.platformio import toolchain
 
     idedata = toolchain.get_idedata(config)
@@ -537,7 +539,7 @@ def _decode_pc(config, addr):
     _LOGGER.warning("Decoded %s", translation)
 
 
-def _parse_register(config, regex, line):
+def _parse_register(config: ConfigType, regex: re.Pattern[str], line: str) -> None:
     match = regex.match(line)
     if match is not None:
         _decode_pc(config, match.group(1))
@@ -561,7 +563,7 @@ STACKTRACE_BAD_ALLOC_RE = re.compile(
 STACKTRACE_ESP8266_BACKTRACE_PC_RE = re.compile(r"4[0-9a-f]{7}")
 
 
-def process_stacktrace(config, line, backtrace_state):
+def process_stacktrace(config: ConfigType, line: str, backtrace_state: bool) -> bool:
     line = line.strip()
     # ESP8266 Exception type
     match = re.match(STACKTRACE_ESP8266_EXCEPTION_TYPE_RE, line)
diff --git a/esphome/components/esp8266/gpio.py b/esphome/components/esp8266/gpio.py
index 64be4a6495..356af6e006 100644
--- a/esphome/components/esp8266/gpio.py
+++ b/esphome/components/esp8266/gpio.py
@@ -1,5 +1,6 @@
 from dataclasses import dataclass
 import logging
+from typing import Any
 
 from esphome import pins
 import esphome.codegen as cg
@@ -18,6 +19,8 @@ from esphome.const import (
     PLATFORM_ESP8266,
 )
 from esphome.core import CORE, CoroPriority, coroutine_with_priority
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 from . import boards
 from .const import KEY_BOARD, KEY_ESP8266, KEY_PIN_INITIAL_STATES, esp8266_ns
@@ -27,7 +30,7 @@ _LOGGER = logging.getLogger(__name__)
 ESP8266GPIOPin = esp8266_ns.class_("ESP8266GPIOPin", cg.InternalGPIOPin)
 
 
-def _lookup_pin(value):
+def _lookup_pin(value: str) -> int:
     board = CORE.data[KEY_ESP8266][KEY_BOARD]
     board_pins = boards.ESP8266_BOARD_PINS.get(board, {})
 
@@ -42,7 +45,7 @@ def _lookup_pin(value):
     raise cv.Invalid(f"Cannot resolve pin name '{value}' for board {board}.")
 
 
-def _translate_pin(value):
+def _translate_pin(value: Any) -> int:
     if isinstance(value, dict) or value is None:
         raise cv.Invalid(
             "This variable only supports pin numbers, not full pin schemas "
@@ -69,7 +72,7 @@ _ESP_SDIO_PINS = {
 }
 
 
-def validate_gpio_pin(value):
+def validate_gpio_pin(value: Any) -> int:
     value = _translate_pin(value)
     if value < 0 or value > 17:
         raise cv.Invalid(f"ESP8266: Invalid pin number: {value}")
@@ -86,7 +89,7 @@ def validate_gpio_pin(value):
     return value
 
 
-def validate_supports(value):
+def validate_supports(value: ConfigType) -> ConfigType:
     num = value[CONF_NUMBER]
     mode = value[CONF_MODE]
     is_input = mode[CONF_INPUT]
@@ -160,7 +163,7 @@ class PinInitialState:
 
 
 @pins.PIN_SCHEMA_REGISTRY.register(PLATFORM_ESP8266, ESP8266_PIN_SCHEMA)
-async def esp8266_pin_to_code(config):
+async def esp8266_pin_to_code(config: ConfigType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID])
     num = config[CONF_NUMBER]
     mode = config[CONF_MODE]
@@ -192,7 +195,7 @@ async def esp8266_pin_to_code(config):
 
 
 @coroutine_with_priority(CoroPriority.WORKAROUNDS)
-async def add_pin_initial_states_array():
+async def add_pin_initial_states_array() -> None:
     # Add includes at the very end, so that they override everything
     initial_states: list[PinInitialState] = CORE.data[KEY_ESP8266][
         KEY_PIN_INITIAL_STATES
diff --git a/esphome/components/esp8266_pwm/output.py b/esphome/components/esp8266_pwm/output.py
index f119a6ba9f..dd151a3e04 100644
--- a/esphome/components/esp8266_pwm/output.py
+++ b/esphome/components/esp8266_pwm/output.py
@@ -4,11 +4,14 @@ from esphome.components import output
 from esphome.components.esp8266.const import require_waveform
 import esphome.config_validation as cv
 from esphome.const import CONF_FREQUENCY, CONF_ID, CONF_NUMBER, CONF_PIN
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 DEPENDENCIES = ["esp8266"]
 
 
-def valid_pwm_pin(value):
+def valid_pwm_pin(value: ConfigType) -> ConfigType:
     num = value[CONF_NUMBER]
     cv.one_of(0, 1, 2, 3, 4, 5, 9, 10, 12, 13, 14, 15, 16)(num)
     return value
@@ -35,7 +38,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config) -> None:
+async def to_code(config: ConfigType) -> None:
     require_waveform()
 
     var = cg.new_Pvariable(config[CONF_ID])
@@ -59,7 +62,12 @@ async def to_code(config) -> None:
     ),
     synchronous=True,
 )
-async def esp8266_set_frequency_to_code(config, action_id, template_arg, args):
+async def esp8266_set_frequency_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, paren)
     template_ = await cg.templatable(config[CONF_FREQUENCY], args, cg.float_)
diff --git a/esphome/components/espnow/espnow_component.cpp b/esphome/components/espnow/espnow_component.cpp
index df9a1b8668..ecf0f79e4a 100644
--- a/esphome/components/espnow/espnow_component.cpp
+++ b/esphome/components/espnow/espnow_component.cpp
@@ -129,14 +129,17 @@ void on_data_received(const esp_now_recv_info_t *info, const uint8_t *data, int
 ESPNowComponent::ESPNowComponent() { global_esp_now = this; }
 
 void ESPNowComponent::dump_config() {
-  uint32_t version = 0;
-  esp_now_get_version(&version);
-
   ESP_LOGCONFIG(TAG, "espnow:");
-  if (this->is_disabled()) {
-    ESP_LOGCONFIG(TAG, "  Disabled");
+  // Only report driver details once enabled; with enable_on_boot: false the
+  // Wi-Fi driver is not initialized yet and esp_now_get_version() would crash,
+  // and after a failed enable_() the values would be meaningless.
+  if (this->state_ != ESPNOW_STATE_ENABLED) {
+    // OFF here means enable_() failed; the core logs the FAILED marker separately
+    ESP_LOGCONFIG(TAG, "  %s", this->is_disabled() ? LOG_STR_LITERAL("Disabled") : LOG_STR_LITERAL("Not enabled"));
     return;
   }
+  uint32_t version = 0;
+  esp_now_get_version(&version);
   char own_addr_buf[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
   format_mac_addr_upper(this->own_address_, own_addr_buf);
   ESP_LOGCONFIG(TAG,
diff --git a/esphome/components/ethernet/__init__.py b/esphome/components/ethernet/__init__.py
index 7686b64cb4..cd5904f501 100644
--- a/esphome/components/ethernet/__init__.py
+++ b/esphome/components/ethernet/__init__.py
@@ -48,10 +48,12 @@ from esphome.const import (
 )
 from esphome.core import (
     CORE,
+    ID,
     CoroPriority,
     TimePeriodMilliseconds,
     coroutine_with_priority,
 )
+from esphome.cpp_generator import MockObj, TemplateArgsType
 import esphome.final_validate as fv
 from esphome.types import ConfigType
 
@@ -276,7 +278,7 @@ def _validate_spi_interface(config: ConfigType) -> ConfigType:
     return config
 
 
-def _validate(config):
+def _validate(config: ConfigType) -> ConfigType:
     if CONF_USE_ADDRESS not in config:
         if CONF_MANUAL_IP in config:
             use_address = str(config[CONF_MANUAL_IP][CONF_STATIC_IP])
@@ -441,7 +443,7 @@ GENERIC_SCHEMA = cv.All(
 )
 
 
-def _spi_schema(default_clock: str = "26.67MHz", max_clock: int = int(80e6)):
+def _spi_schema(default_clock: str = "26.67MHz", max_clock: int = int(80e6)) -> cv.All:
     return cv.All(
         BASE_SCHEMA.extend(
             cv.Schema(
@@ -517,7 +519,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-def _final_validate_spi(config):
+def _final_validate_spi(config: ConfigType) -> None:
     if not CORE.is_esp32:
         return  # SPI interface validation is ESP32-only
     if config[CONF_TYPE] not in SPI_ETHERNET_TYPES:
@@ -537,7 +539,7 @@ def _final_validate_spi(config):
                     )
 
 
-def manual_ip(config):
+def manual_ip(config: ConfigType) -> cg.StructInitializer:
     return cg.StructInitializer(
         ManualIP,
         ("static_ip", ip_address_literal(config[CONF_STATIC_IP])),
@@ -548,7 +550,7 @@ def manual_ip(config):
     )
 
 
-def phy_register(address: int, value: int, page: int):
+def phy_register(address: int, value: int, page: int) -> cg.StructInitializer:
     return cg.StructInitializer(
         PHYRegister,
         ("address", address),
@@ -558,7 +560,7 @@ def phy_register(address: int, value: int, page: int):
 
 
 @coroutine_with_priority(CoroPriority.COMMUNICATION)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
 
     # Apply network priority before register_component (which emits the user's
@@ -610,7 +612,7 @@ async def to_code(config):
     CORE.add_job(final_step)
 
 
-async def _to_code_esp32(var: cg.Pvariable, config: ConfigType) -> None:
+async def _to_code_esp32(var: cg.MockObj, config: ConfigType) -> None:
     from esphome.components.esp32 import (
         add_idf_component,
         add_idf_sdkconfig_option,
@@ -698,7 +700,7 @@ async def _to_code_esp32(var: cg.Pvariable, config: ConfigType) -> None:
         add_idf_component(name=component.name, ref=component.version)
 
 
-async def _to_code_rp2040(var: cg.Pvariable, config: ConfigType) -> None:
+async def _to_code_rp2040(var: cg.MockObj, config: ConfigType) -> None:
     cg.add(var.set_clk_pin(config[CONF_CLK_PIN]))
     cg.add(var.set_miso_pin(config[CONF_MISO_PIN]))
     cg.add(var.set_mosi_pin(config[CONF_MOSI_PIN]))
@@ -793,7 +795,7 @@ FINAL_VALIDATE_SCHEMA = _final_validate
 
 
 @coroutine_with_priority(CoroPriority.FINAL)
-async def final_step():
+async def final_step() -> None:
     """Final code generation step to configure optional Ethernet features."""
     if ip_state_count := CORE.data.get(ETHERNET_IP_STATE_LISTENERS_KEY, 0):
         cg.add_define("USE_ETHERNET_IP_STATE_LISTENERS")
@@ -845,7 +847,12 @@ def _filter_source_files() -> list[str]:
 FILTER_SOURCE_FILES = _filter_source_files
 
 
-async def _new_pvariable_to_code(config, id_, template_arg, args):
+async def _new_pvariable_to_code(
+    config: ConfigType,
+    id_: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     return cg.new_Pvariable(id_, template_arg)
 
 
diff --git a/esphome/components/factory_reset/__init__.py b/esphome/components/factory_reset/__init__.py
index d5d5d2ecb5..a9064eb18f 100644
--- a/esphome/components/factory_reset/__init__.py
+++ b/esphome/components/factory_reset/__init__.py
@@ -12,6 +12,7 @@ from esphome.const import (
 )
 from esphome.core import CORE
 from esphome.final_validate import full_config
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@anatoly-savchenkov"]
 
@@ -23,7 +24,7 @@ CONF_RESETS_REQUIRED = "resets_required"
 CONF_ON_INCREMENT = "on_increment"
 
 
-def _validate(config):
+def _validate(config: ConfigType) -> ConfigType:
     if CONF_RESETS_REQUIRED in config:
         return cv.only_on(
             [
@@ -60,7 +61,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-def _final_validate(config) -> None:
+def _final_validate(config: ConfigType) -> None:
     if CORE.is_esp8266 and CONF_RESETS_REQUIRED in config:
         fconfig = full_config.get()
         if not fconfig.get_config_for_path([KEY_ESP8266, CONF_RESTORE_FROM_FLASH]):
@@ -81,7 +82,7 @@ _CALLBACK_AUTOMATIONS = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     if reset_count := config.get(CONF_RESETS_REQUIRED):
         var = cg.new_Pvariable(
             config[CONF_ID],
diff --git a/esphome/components/factory_reset/button/__init__.py b/esphome/components/factory_reset/button/__init__.py
index 61df5f297b..040614c151 100644
--- a/esphome/components/factory_reset/button/__init__.py
+++ b/esphome/components/factory_reset/button/__init__.py
@@ -7,6 +7,7 @@ from esphome.const import (
     ENTITY_CATEGORY_CONFIG,
     ICON_RESTART_ALERT,
 )
+from esphome.types import ConfigType
 
 from .. import factory_reset_ns
 
@@ -22,7 +23,7 @@ CONFIG_SCHEMA = button.button_schema(
 ).extend(cv.COMPONENT_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await button.register_button(var, config)
diff --git a/esphome/components/factory_reset/switch/__init__.py b/esphome/components/factory_reset/switch/__init__.py
index a384a57f80..69a635a917 100644
--- a/esphome/components/factory_reset/switch/__init__.py
+++ b/esphome/components/factory_reset/switch/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import switch
 import esphome.config_validation as cv
 from esphome.const import ENTITY_CATEGORY_CONFIG, ICON_RESTART_ALERT
+from esphome.types import ConfigType
 
 from .. import factory_reset_ns
 
@@ -17,6 +18,6 @@ CONFIG_SCHEMA = switch.switch_schema(
 ).extend(cv.COMPONENT_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await switch.new_switch(config)
     await cg.register_component(var, config)
diff --git a/esphome/components/file/image.py b/esphome/components/file/image.py
index feced063d0..7cef7c754a 100644
--- a/esphome/components/file/image.py
+++ b/esphome/components/file/image.py
@@ -5,6 +5,7 @@ import io
 import logging
 from pathlib import Path
 import re
+from typing import Any
 
 from PIL import Image, UnidentifiedImageError
 
@@ -75,12 +76,12 @@ def compute_local_image_path(value: str | ConfigType) -> Path:
     return external_files.compute_local_file_path(DOMAIN, url)
 
 
-def local_path(value):
+def local_path(value: str | ConfigType) -> str:
     value = value[CONF_PATH] if isinstance(value, dict) else value
     return str(CORE.relative_config_path(value))
 
 
-def download_file(url, path):
+def download_file(url: str, path: Path) -> str:
     # The shared NETWORK_TIMEOUT applies; a per-caller timeout would be
     # silently ignored on a per-run memo hit anyway (memos key by path).
     external_files.download_content(url, path)
@@ -98,7 +99,7 @@ def download_gh_svg(value: str | ConfigType, source: str) -> str:
     return download_file(url, path)
 
 
-def download_image(value):
+def download_image(value: str | ConfigType) -> str:
     value = value[CONF_URL] if isinstance(value, dict) else value
     return download_file(value, compute_local_image_path(value))
 
@@ -146,7 +147,7 @@ def _extract_entry_ref(entry: ConfigType) -> RemoteFile | None:
 PREFETCH_FILES = external_files.single_stage_prefetch(_extract_entry_ref)
 
 
-def validate_file_shorthand(value):
+def validate_file_shorthand(value: Any) -> str:
     value = cv.string_strict(value)
     if (remote := _parse_remote_shorthand(value)) is not None:
         return download_file(remote.url, remote.path)
@@ -163,8 +164,8 @@ LOCAL_SCHEMA = cv.All(
 )
 
 
-def mdi_schema(source):
-    def validate_mdi(value):
+def mdi_schema(source: str) -> cv.All:
+    def validate_mdi(value: ConfigType) -> str:
         return download_gh_svg(value, source)
 
     return cv.All(
@@ -259,7 +260,9 @@ async def new_image(config: ConfigType) -> MockObj:
     return var
 
 
-async def write_image(config, all_frames=False):
+async def write_image(
+    config: ConfigType, all_frames: bool = False
+) -> tuple[MockObj, int, int, MockObj, MockObj, int]:
     path = Path(config[CONF_FILE])
     if not path.is_file():
         raise core.EsphomeError(f"Could not load image file {path}")
diff --git a/esphome/components/gdk101/__init__.py b/esphome/components/gdk101/__init__.py
index 878f27bc44..f98af3f863 100644
--- a/esphome/components/gdk101/__init__.py
+++ b/esphome/components/gdk101/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import i2c
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@Szewcson"]
 
@@ -26,7 +27,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
diff --git a/esphome/components/gdk101/binary_sensor.py b/esphome/components/gdk101/binary_sensor.py
index a80487977f..14f5fa0e1c 100644
--- a/esphome/components/gdk101/binary_sensor.py
+++ b/esphome/components/gdk101/binary_sensor.py
@@ -7,6 +7,7 @@ from esphome.const import (
     ENTITY_CATEGORY_DIAGNOSTIC,
     ICON_VIBRATE,
 )
+from esphome.types import ConfigType
 
 from . import CONF_GDK101_ID, GDK101Component
 
@@ -24,7 +25,7 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_GDK101_ID])
     var = await binary_sensor.new_binary_sensor(config[CONF_VIBRATIONS])
     cg.add(hub.set_vibration_binary_sensor(var))
diff --git a/esphome/components/gdk101/sensor.py b/esphome/components/gdk101/sensor.py
index 6cf89e0fd4..4ed081a7be 100644
--- a/esphome/components/gdk101/sensor.py
+++ b/esphome/components/gdk101/sensor.py
@@ -15,6 +15,7 @@ from esphome.const import (
     UNIT_MICROSILVERTS_PER_HOUR,
     UNIT_SECOND,
 )
+from esphome.types import ConfigType
 
 from . import CONF_GDK101_ID, GDK101Component
 
@@ -59,7 +60,7 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_GDK101_ID])
 
     if radiation_dose_per_1m := config.get(CONF_RADIATION_DOSE_PER_1M):
diff --git a/esphome/components/gdk101/text_sensor.py b/esphome/components/gdk101/text_sensor.py
index 703e68493a..bdef2466df 100644
--- a/esphome/components/gdk101/text_sensor.py
+++ b/esphome/components/gdk101/text_sensor.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import text_sensor
 import esphome.config_validation as cv
 from esphome.const import CONF_VERSION, ENTITY_CATEGORY_DIAGNOSTIC, ICON_CHIP
+from esphome.types import ConfigType
 
 from . import CONF_GDK101_ID, GDK101Component
 
@@ -17,7 +18,7 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_GDK101_ID])
     var = await text_sensor.new_text_sensor(config[CONF_VERSION])
     cg.add(hub.set_fw_version_text_sensor(var))
diff --git a/esphome/components/globals/__init__.py b/esphome/components/globals/__init__.py
index 46725fe6dd..bd6bc5f783 100644
--- a/esphome/components/globals/__init__.py
+++ b/esphome/components/globals/__init__.py
@@ -8,7 +8,8 @@ from esphome.const import (
     CONF_TYPE,
     CONF_VALUE,
 )
-from esphome.core import CoroPriority, coroutine_with_priority
+from esphome.core import ID, CoroPriority, coroutine_with_priority
+from esphome.cpp_generator import MockObj, TemplateArgsType
 from esphome.types import ConfigType
 
 CODEOWNERS = ["@esphome/core"]
@@ -62,7 +63,7 @@ CONFIG_SCHEMA = _globals_schema
 
 # Run with low priority so that namespaces are registered first
 @coroutine_with_priority(CoroPriority.LATE)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     type_ = cg.RawExpression(config[CONF_TYPE])
     restore = config[CONF_RESTORE_VALUE]
 
@@ -104,7 +105,12 @@ async def to_code(config):
     ),
     synchronous=True,
 )
-async def globals_set_to_code(config, action_id, template_arg, args):
+async def globals_set_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     full_id, paren = await cg.get_variable_with_full_id(config[CONF_ID])
     template_arg = cg.TemplateArguments(full_id.type, *template_arg)
     var = cg.new_Pvariable(action_id, template_arg, paren)
diff --git a/esphome/components/gpio/binary_sensor/__init__.py b/esphome/components/gpio/binary_sensor/__init__.py
index 703806670c..7cc16eb5b2 100644
--- a/esphome/components/gpio/binary_sensor/__init__.py
+++ b/esphome/components/gpio/binary_sensor/__init__.py
@@ -12,6 +12,7 @@ from esphome.const import (
     CONF_PIN,
 )
 from esphome.core import CORE
+from esphome.types import ConfigType
 
 from .. import gpio_ns
 
@@ -68,7 +69,7 @@ def _pin_shared_only_with_deep_sleep(pin_num: int) -> bool:
     return any(path and path[0] == "deep_sleep" for path, _, _ in pin_users)
 
 
-def _final_validate(config) -> None:
+def _final_validate(config: ConfigType) -> None:
     use_interrupt = config[CONF_USE_INTERRUPT]
     if not use_interrupt:
         return
@@ -124,7 +125,7 @@ def _final_validate(config) -> None:
 FINAL_VALIDATE_SCHEMA = _final_validate
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await binary_sensor.new_binary_sensor(config)
     await cg.register_component(var, config)
 
diff --git a/esphome/components/gpio/one_wire/__init__.py b/esphome/components/gpio/one_wire/__init__.py
index e2bb94dd66..feb8b53dff 100644
--- a/esphome/components/gpio/one_wire/__init__.py
+++ b/esphome/components/gpio/one_wire/__init__.py
@@ -3,6 +3,7 @@ import esphome.codegen as cg
 from esphome.components.one_wire import OneWireBus
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_PIN
+from esphome.types import ConfigType
 
 from .. import gpio_ns
 
@@ -18,7 +19,7 @@ CONFIG_SCHEMA = cv.Schema(
 ).extend(cv.COMPONENT_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
 
diff --git a/esphome/components/gpio/output/__init__.py b/esphome/components/gpio/output/__init__.py
index 786e04bac0..ab242c643f 100644
--- a/esphome/components/gpio/output/__init__.py
+++ b/esphome/components/gpio/output/__init__.py
@@ -3,6 +3,7 @@ import esphome.codegen as cg
 from esphome.components import output
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_PIN
+from esphome.types import ConfigType
 
 from .. import gpio_ns
 
@@ -16,7 +17,7 @@ CONFIG_SCHEMA = output.BINARY_OUTPUT_SCHEMA.extend(
 ).extend(cv.COMPONENT_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await output.register_output(var, config)
     await cg.register_component(var, config)
diff --git a/esphome/components/gpio/switch/__init__.py b/esphome/components/gpio/switch/__init__.py
index 9462cd0161..2e0b0969bc 100644
--- a/esphome/components/gpio/switch/__init__.py
+++ b/esphome/components/gpio/switch/__init__.py
@@ -3,6 +3,7 @@ import esphome.codegen as cg
 from esphome.components import switch
 import esphome.config_validation as cv
 from esphome.const import CONF_INTERLOCK, CONF_PIN
+from esphome.types import ConfigType
 
 from .. import gpio_ns
 
@@ -24,7 +25,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await switch.new_switch(config)
     await cg.register_component(var, config)
 
diff --git a/esphome/components/graph/__init__.py b/esphome/components/graph/__init__.py
index 0749d7e2a3..1b99491f9c 100644
--- a/esphome/components/graph/__init__.py
+++ b/esphome/components/graph/__init__.py
@@ -29,6 +29,7 @@ from esphome.const import (
     CONF_X_GRID,
     CONF_Y_GRID,
 )
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@synco"]
 
@@ -115,7 +116,9 @@ GRAPH_SCHEMA = cv.Schema(
 )
 
 
-def _relocate_fields_to_subfolder(config, subfolder, subschema):
+def _relocate_fields_to_subfolder(
+    config: ConfigType, subfolder: str, subschema: cv.Schema
+) -> ConfigType:
     fields = [k.schema for k in subschema.schema]
     fields.remove(CONF_ID)
     if subfolder in config:
@@ -138,7 +141,7 @@ def _relocate_fields_to_subfolder(config, subfolder, subschema):
     return config
 
 
-def _relocate_trace(config):
+def _relocate_trace(config: ConfigType) -> ConfigType:
     return _relocate_fields_to_subfolder(config, CONF_TRACES, GRAPH_TRACE_SCHEMA)
 
 
@@ -148,7 +151,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     cg.add(var.set_duration(config[CONF_DURATION]))
     cg.add(var.set_width(config[CONF_WIDTH]))
diff --git a/esphome/components/hbridge/fan/__init__.py b/esphome/components/hbridge/fan/__init__.py
index 8ea8677ba2..2cf1693b47 100644
--- a/esphome/components/hbridge/fan/__init__.py
+++ b/esphome/components/hbridge/fan/__init__.py
@@ -13,6 +13,9 @@ from esphome.const import (
     CONF_PRESET_MODES,
     CONF_SPEED_COUNT,
 )
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 from .. import hbridge_ns
 
@@ -54,12 +57,17 @@ CONFIG_SCHEMA = (
     maybe_simple_id({cv.GenerateID(): cv.use_id(HBridgeFan)}),
     synchronous=True,
 )
-async def fan_hbridge_brake_to_code(config, action_id, template_arg, args):
+async def fan_hbridge_brake_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await fan.new_fan(
         config,
         config[CONF_SPEED_COUNT],
diff --git a/esphome/components/hbridge/light/__init__.py b/esphome/components/hbridge/light/__init__.py
index f9451e2594..f7866cb990 100644
--- a/esphome/components/hbridge/light/__init__.py
+++ b/esphome/components/hbridge/light/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import light, output
 import esphome.config_validation as cv
 from esphome.const import CONF_OUTPUT_ID, CONF_PIN_A, CONF_PIN_B, CONF_UPDATE_INTERVAL
+from esphome.types import ConfigType
 
 from .. import hbridge_ns
 
@@ -21,7 +22,7 @@ CONFIG_SCHEMA = light.RGB_LIGHT_SCHEMA.extend(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_OUTPUT_ID])
     cg.add(var.set_update_interval(config.pop(CONF_UPDATE_INTERVAL)))
     await cg.register_component(var, config)
diff --git a/esphome/components/hbridge/switch/__init__.py b/esphome/components/hbridge/switch/__init__.py
index e26bd6b1d8..294be6ed5f 100644
--- a/esphome/components/hbridge/switch/__init__.py
+++ b/esphome/components/hbridge/switch/__init__.py
@@ -3,6 +3,7 @@ import esphome.codegen as cg
 from esphome.components import switch
 import esphome.config_validation as cv
 from esphome.const import CONF_OPTIMISTIC, CONF_PULSE_LENGTH, CONF_WAIT_TIME
+from esphome.types import ConfigType
 
 from .. import hbridge_ns
 
@@ -30,7 +31,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await switch.new_switch(config)
     await cg.register_component(var, config)
 
diff --git a/esphome/components/hc8/sensor.py b/esphome/components/hc8/sensor.py
index 29b428e310..616162eb40 100644
--- a/esphome/components/hc8/sensor.py
+++ b/esphome/components/hc8/sensor.py
@@ -12,6 +12,9 @@ from esphome.const import (
     STATE_CLASS_MEASUREMENT,
     UNIT_PARTS_PER_MILLION,
 )
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 DEPENDENCIES = ["uart"]
 
@@ -47,7 +50,7 @@ FINAL_VALIDATE_SCHEMA = uart.final_validate_device_schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await uart.register_uart_device(var, config)
@@ -73,7 +76,12 @@ CALIBRATION_ACTION_SCHEMA = cv.Schema(
     CALIBRATION_ACTION_SCHEMA,
     synchronous=True,
 )
-async def hc8_calibration_to_code(config, action_id, template_arg, args):
+async def hc8_calibration_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     template_ = await cg.templatable(config[CONF_BASELINE], args, cg.uint16)
diff --git a/esphome/components/hdc302x/sensor.py b/esphome/components/hdc302x/sensor.py
index a6265b9b98..6d91c3df7c 100644
--- a/esphome/components/hdc302x/sensor.py
+++ b/esphome/components/hdc302x/sensor.py
@@ -1,3 +1,5 @@
+from typing import Any
+
 from esphome import automation
 from esphome.automation import maybe_simple_id
 import esphome.codegen as cg
@@ -16,6 +18,9 @@ from esphome.const import (
     UNIT_CELSIUS,
     UNIT_PERCENT,
 )
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 DEPENDENCIES = ["i2c"]
 
@@ -62,7 +67,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
@@ -86,7 +91,7 @@ HDC302X_HEATER_POWER_MAP = {
 }
 
 
-def heater_power_value(value):
+def heater_power_value(value: Any) -> cv.Lambda | int:
     """Accept enum names or raw uint16 values"""
     if isinstance(value, cv.Lambda):
         return value
@@ -119,7 +124,12 @@ HDC302X_HEATER_ON_ACTION_SCHEMA = maybe_simple_id(
     HDC302X_HEATER_ON_ACTION_SCHEMA,
     synchronous=True,
 )
-async def hdc302x_heater_on_to_code(config, action_id, template_arg, args):
+async def hdc302x_heater_on_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     template_ = await cg.templatable(config[CONF_POWER], args, cg.uint16)
@@ -135,7 +145,12 @@ async def hdc302x_heater_on_to_code(config, action_id, template_arg, args):
     HDC302X_ACTION_SCHEMA,
     synchronous=True,
 )
-async def hdc302x_heater_off_to_code(config, action_id, template_arg, args):
+async def hdc302x_heater_off_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     return var
diff --git a/esphome/components/hmc5883l/sensor.py b/esphome/components/hmc5883l/sensor.py
index cf3c594f36..a2e1f8054a 100644
--- a/esphome/components/hmc5883l/sensor.py
+++ b/esphome/components/hmc5883l/sensor.py
@@ -1,3 +1,6 @@
+from collections.abc import Callable
+from typing import Any
+
 import esphome.codegen as cg
 from esphome.components import i2c, sensor
 import esphome.config_validation as cv
@@ -17,6 +20,8 @@ from esphome.const import (
     UNIT_DEGREES,
     UNIT_MICROTESLA,
 )
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 DEPENDENCIES = ["i2c"]
 
@@ -59,14 +64,16 @@ HMC5883L_RANGES = {
 }
 
 
-def validate_enum(enum_values, units=None, int=True):
+def validate_enum(
+    enum_values: dict[Any, Any], units: str | list[str] | None = None, int: bool = True
+) -> Callable[[Any], Any]:
     _units = []
     if units is not None:
         _units = units if isinstance(units, list) else [units]
         _units = [str(x) for x in _units]
     enum_bound = cv.enum(enum_values, int=int)
 
-    def validate_enum_bound(value):
+    def validate_enum_bound(value: Any) -> Any:
         value = cv.string(value)
         for unit in _units:
             if value.endswith(unit):
@@ -112,7 +119,7 @@ CONFIG_SCHEMA = (
 )
 
 
-def auto_data_rate(config):
+def auto_data_rate(config: ConfigType) -> MockObj:
     interval_msec = config[CONF_UPDATE_INTERVAL].total_milliseconds
     interval_hz = 1000.0 / interval_msec
     for datarate in sorted(HMC5883LDatarates.keys()):
@@ -121,7 +128,7 @@ def auto_data_rate(config):
     return HMC5883LDatarates[75]
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
diff --git a/esphome/components/homeassistant/__init__.py b/esphome/components/homeassistant/__init__.py
index 7b23775b47..1b66842f1e 100644
--- a/esphome/components/homeassistant/__init__.py
+++ b/esphome/components/homeassistant/__init__.py
@@ -1,13 +1,19 @@
+from collections.abc import Callable, Iterable
+
 import esphome.codegen as cg
 import esphome.config_validation as cv
 from esphome.const import CONF_ATTRIBUTE, CONF_ENTITY_ID, CONF_INTERNAL
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@OttoWinter", "@esphome/core"]
 homeassistant_ns = cg.esphome_ns.namespace("homeassistant")
 
 
-def validate_entity_domain(platform, supported_domains):
-    def validator(config):
+def validate_entity_domain(
+    platform: str, supported_domains: Iterable[str]
+) -> Callable[[ConfigType], ConfigType]:
+    def validator(config: ConfigType) -> ConfigType:
         domain = config[CONF_ENTITY_ID].split(".", 1)[0]
         if domain not in supported_domains:
             raise cv.Invalid(
@@ -34,7 +40,7 @@ HOME_ASSISTANT_IMPORT_CONTROL_SCHEMA = cv.Schema(
 )
 
 
-def setup_home_assistant_entity(var, config):
+def setup_home_assistant_entity(var: MockObj, config: ConfigType) -> None:
     cg.add(var.set_entity_id(config[CONF_ENTITY_ID]))
     if CONF_ATTRIBUTE in config:
         cg.add(var.set_attribute(config[CONF_ATTRIBUTE]))
diff --git a/esphome/components/homeassistant/binary_sensor/__init__.py b/esphome/components/homeassistant/binary_sensor/__init__.py
index a943368dd7..6ea17b6831 100644
--- a/esphome/components/homeassistant/binary_sensor/__init__.py
+++ b/esphome/components/homeassistant/binary_sensor/__init__.py
@@ -1,5 +1,6 @@
 import esphome.codegen as cg
 from esphome.components import binary_sensor
+from esphome.types import ConfigType
 
 from .. import (
     HOME_ASSISTANT_IMPORT_SCHEMA,
@@ -18,7 +19,7 @@ CONFIG_SCHEMA = binary_sensor.binary_sensor_schema(HomeassistantBinarySensor).ex
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await binary_sensor.new_binary_sensor(config)
     await cg.register_component(var, config)
     setup_home_assistant_entity(var, config)
diff --git a/esphome/components/homeassistant/number/__init__.py b/esphome/components/homeassistant/number/__init__.py
index 8f760772c3..ab1389e13a 100644
--- a/esphome/components/homeassistant/number/__init__.py
+++ b/esphome/components/homeassistant/number/__init__.py
@@ -1,6 +1,7 @@
 import esphome.codegen as cg
 from esphome.components import number
 import esphome.config_validation as cv
+from esphome.types import ConfigType
 
 from .. import (
     HOME_ASSISTANT_IMPORT_CONTROL_SCHEMA,
@@ -22,7 +23,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_define("USE_API_HOMEASSISTANT_SERVICES")
     var = await number.new_number(
         config,
diff --git a/esphome/components/homeassistant/sensor/__init__.py b/esphome/components/homeassistant/sensor/__init__.py
index 6437476827..abee957fda 100644
--- a/esphome/components/homeassistant/sensor/__init__.py
+++ b/esphome/components/homeassistant/sensor/__init__.py
@@ -1,5 +1,6 @@
 import esphome.codegen as cg
 from esphome.components import sensor
+from esphome.types import ConfigType
 
 from .. import (
     HOME_ASSISTANT_IMPORT_SCHEMA,
@@ -18,7 +19,7 @@ CONFIG_SCHEMA = sensor.sensor_schema(HomeassistantSensor, accuracy_decimals=1).e
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await sensor.new_sensor(config)
     await cg.register_component(var, config)
     setup_home_assistant_entity(var, config)
diff --git a/esphome/components/homeassistant/switch/__init__.py b/esphome/components/homeassistant/switch/__init__.py
index c299a731f2..55854cd659 100644
--- a/esphome/components/homeassistant/switch/__init__.py
+++ b/esphome/components/homeassistant/switch/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import switch
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.types import ConfigType
 
 from .. import (
     HOME_ASSISTANT_IMPORT_CONTROL_SCHEMA,
@@ -36,7 +37,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_define("USE_API_HOMEASSISTANT_SERVICES")
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
diff --git a/esphome/components/homeassistant/text_sensor/__init__.py b/esphome/components/homeassistant/text_sensor/__init__.py
index b59f9d23df..265250c695 100644
--- a/esphome/components/homeassistant/text_sensor/__init__.py
+++ b/esphome/components/homeassistant/text_sensor/__init__.py
@@ -1,5 +1,6 @@
 import esphome.codegen as cg
 from esphome.components import text_sensor
+from esphome.types import ConfigType
 
 from .. import (
     HOME_ASSISTANT_IMPORT_SCHEMA,
@@ -18,7 +19,7 @@ CONFIG_SCHEMA = text_sensor.text_sensor_schema(HomeassistantTextSensor).extend(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await text_sensor.new_text_sensor(config)
     await cg.register_component(var, config)
     setup_home_assistant_entity(var, config)
diff --git a/esphome/components/homeassistant/time/__init__.py b/esphome/components/homeassistant/time/__init__.py
index 05ca86a26e..146b8278ea 100644
--- a/esphome/components/homeassistant/time/__init__.py
+++ b/esphome/components/homeassistant/time/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import time as time_
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_TIMEZONE
+from esphome.types import ConfigType
 
 from .. import homeassistant_ns
 
@@ -16,7 +17,7 @@ CONFIG_SCHEMA = time_.TIME_SCHEMA.extend(
 ).extend(cv.COMPONENT_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await time_.register_time(var, config)
     await cg.register_component(var, config)
diff --git a/esphome/components/host/__init__.py b/esphome/components/host/__init__.py
index 1717870238..401bba5118 100644
--- a/esphome/components/host/__init__.py
+++ b/esphome/components/host/__init__.py
@@ -11,6 +11,7 @@ from esphome.const import (
 )
 from esphome.core import CORE
 from esphome.platformio.toolchain import copy_ccache_script
+from esphome.types import ConfigType
 
 from .const import KEY_HOST
 
@@ -22,7 +23,7 @@ AUTO_LOAD = ["network", "preferences"]
 IS_TARGET_PLATFORM = True
 
 
-def set_core_data(config):
+def set_core_data(config: ConfigType) -> ConfigType:
     CORE.data[KEY_HOST] = {}
     CORE.data[KEY_CORE][KEY_TARGET_PLATFORM] = PLATFORM_HOST
     CORE.data[KEY_CORE][KEY_TARGET_FRAMEWORK] = "host"
@@ -41,7 +42,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_build_flag("-DUSE_HOST")
     cg.add_define("USE_NATIVE_64BIT_TIME")
     # The prefs file finds stored preferences by key, so key migration is possible
diff --git a/esphome/components/host/gpio.py b/esphome/components/host/gpio.py
index fcfb0b6c54..e39d35d077 100644
--- a/esphome/components/host/gpio.py
+++ b/esphome/components/host/gpio.py
@@ -1,4 +1,5 @@
 import logging
+from typing import Any
 
 from esphome import pins
 import esphome.codegen as cg
@@ -14,6 +15,8 @@ from esphome.const import (
     CONF_PULLDOWN,
     CONF_PULLUP,
 )
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 from .const import host_ns
 
@@ -22,7 +25,7 @@ _LOGGER = logging.getLogger(__name__)
 HostGPIOPin = host_ns.class_("HostGPIOPin", cg.InternalGPIOPin)
 
 
-def _translate_pin(value):
+def _translate_pin(value: Any) -> int | str:
     if isinstance(value, dict) or value is None:
         raise cv.Invalid(
             "This variable only supports pin numbers, not full pin schemas "
@@ -41,7 +44,7 @@ def _translate_pin(value):
     return value
 
 
-def validate_gpio_pin(value):
+def validate_gpio_pin(value: Any) -> int | str:
     return _translate_pin(value)
 
 
@@ -53,7 +56,7 @@ HOST_PIN_SCHEMA = pins.gpio_base_schema(
 
 
 @pins.PIN_SCHEMA_REGISTRY.register("host", HOST_PIN_SCHEMA)
-async def host_pin_to_code(config):
+async def host_pin_to_code(config: ConfigType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID])
     num = config[CONF_NUMBER]
     cg.add(var.set_pin(num))
diff --git a/esphome/components/host/time/__init__.py b/esphome/components/host/time/__init__.py
index d9a2f1207c..6eb0cf954d 100644
--- a/esphome/components/host/time/__init__.py
+++ b/esphome/components/host/time/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import time as time_
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@clydebarrow"]
 
@@ -14,7 +15,7 @@ CONFIG_SCHEMA = time_.TIME_SCHEMA.extend(
 ).extend(cv.COMPONENT_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await time_.register_time(var, config)
diff --git a/esphome/components/htu21d/sensor.py b/esphome/components/htu21d/sensor.py
index 8808dc70f5..86dca77725 100644
--- a/esphome/components/htu21d/sensor.py
+++ b/esphome/components/htu21d/sensor.py
@@ -17,6 +17,9 @@ from esphome.const import (
     UNIT_EMPTY,
     UNIT_PERCENT,
 )
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 DEPENDENCIES = ["i2c"]
 
@@ -63,7 +66,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
@@ -95,7 +98,12 @@ async def to_code(config):
     ),
     synchronous=True,
 )
-async def set_heater_level_to_code(config, action_id, template_arg, args):
+async def set_heater_level_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     level_ = await cg.templatable(config[CONF_LEVEL], args, cg.uint8)
@@ -115,7 +123,12 @@ async def set_heater_level_to_code(config, action_id, template_arg, args):
     ),
     synchronous=True,
 )
-async def set_heater_to_code(config, action_id, template_arg, args):
+async def set_heater_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     status_ = await cg.templatable(config[CONF_STATUS], args, cg.bool_)
diff --git a/esphome/components/i2c/__init__.py b/esphome/components/i2c/__init__.py
index 94aad4d019..b053125446 100644
--- a/esphome/components/i2c/__init__.py
+++ b/esphome/components/i2c/__init__.py
@@ -1,6 +1,7 @@
 import logging
 import re
 import sys
+from typing import Any
 
 from esphome import pins
 import esphome.codegen as cg
@@ -52,9 +53,10 @@ from esphome.const import (
     PLATFORM_RP2,
     PlatformFramework,
 )
-from esphome.core import CORE, CoroPriority, coroutine_with_priority
+from esphome.core import CORE, ID, CoroPriority, coroutine_with_priority
 from esphome.cpp_generator import MockObj
 import esphome.final_validate as fv
+from esphome.types import ConfigType
 
 LOGGER = logging.getLogger(__name__)
 CODEOWNERS = ["@esphome/core"]
@@ -96,13 +98,13 @@ CONF_SCL_PULLUP_ENABLED = "scl_pullup_enabled"
 MULTI_CONF = True
 
 
-def validate_device(value):
+def validate_device(value: str) -> str:
     if not re.match(r"^/(?:[^/]+/)*[^/]+$", value):
         raise cv.Invalid("Device must be an absolute device path (e.g., /dev/i2c-0)")
     return value
 
 
-def _bus_declare_type(value):
+def _bus_declare_type(value: Any) -> ID:
     if CORE.is_esp32:
         return cv.declare_id(IDFI2CBus)(value)
     if CORE.using_arduino:
@@ -114,7 +116,7 @@ def _bus_declare_type(value):
     raise NotImplementedError
 
 
-def _rp2040_i2c_controller(pin):
+def _rp2040_i2c_controller(pin: int) -> int:
     """Return the I2C controller number (0 or 1) for a given RP2040/RP2350 GPIO pin.
 
     See RP2040 datasheet Table 2 (section 1.4.3, "GPIO Functions"):
@@ -125,7 +127,7 @@ def _rp2040_i2c_controller(pin):
     return (pin // 2) % 2
 
 
-def validate_config(config):
+def validate_config(config: ConfigType) -> ConfigType:
     if CORE.is_esp32:
         return cv.require_framework_version(
             esp_idf=cv.Version(5, 4, 2), esp32_arduino=cv.Version(3, 2, 1)
@@ -142,7 +144,7 @@ def validate_config(config):
     return config
 
 
-def validate_host_config(config):
+def validate_host_config(config: ConfigType) -> ConfigType:
     if CORE.is_host:
         # Host I2C is currently only supported on Linux
         if not sys.platform.lower().startswith("linux"):
@@ -229,7 +231,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-def _final_validate(config):
+def _final_validate(config: ConfigType) -> None:
     full_config = fv.full_config.get()[CONF_I2C]
     if CORE.using_zephyr and len(full_config) > 1:
         raise cv.Invalid("Second i2c is not implemented on Zephyr yet")
@@ -281,7 +283,7 @@ FINAL_VALIDATE_SCHEMA = _final_validate
 
 
 @coroutine_with_priority(CoroPriority.BUS)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_global(i2c_ns.using)
     cg.add_define("USE_I2C")
     if CORE.is_esp32:
@@ -358,7 +360,7 @@ async def to_code(config):
             cg.add(var.set_lp_mode(bool(config[CONF_LOW_POWER_MODE])))
 
 
-def i2c_device_schema(default_address):
+def i2c_device_schema(default_address: int | None) -> cv.Schema:
     """Create a schema for a i2c device.
 
     :param default_address: The default address of the i2c device, can be None to represent
@@ -375,7 +377,7 @@ def i2c_device_schema(default_address):
     return cv.Schema(schema)
 
 
-async def register_i2c_device(var, config):
+async def register_i2c_device(var: MockObj, config: ConfigType) -> None:
     """Register an i2c device with the given config.
 
     Sets the i2c bus to use and the i2c address.
@@ -390,11 +392,11 @@ async def register_i2c_device(var, config):
 def final_validate_device_schema(
     name: str,
     *,
-    min_frequency: cv.frequency = None,
-    max_frequency: cv.frequency = None,
-    min_timeout: cv.time_period = None,
-    max_timeout: cv.time_period = None,
-):
+    min_frequency: Any = None,
+    max_frequency: Any = None,
+    min_timeout: Any = None,
+    max_timeout: Any = None,
+) -> cv.Schema:
     hub_schema = {}
     if (min_frequency is not None) and (max_frequency is not None):
         hub_schema[cv.Required(CONF_FREQUENCY)] = cv.Range(
diff --git a/esphome/components/lcd_base/__init__.py b/esphome/components/lcd_base/__init__.py
index bf1072ce66..08ec395720 100644
--- a/esphome/components/lcd_base/__init__.py
+++ b/esphome/components/lcd_base/__init__.py
@@ -1,7 +1,11 @@
+from typing import Any
+
 import esphome.codegen as cg
 from esphome.components import display
 import esphome.config_validation as cv
 from esphome.const import CONF_DATA, CONF_DIMENSIONS, CONF_POSITION
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 CONF_USER_CHARACTERS = "user_characters"
 
@@ -9,7 +13,7 @@ lcd_base_ns = cg.esphome_ns.namespace("lcd_base")
 LCDDisplay = lcd_base_ns.class_("LCDDisplay", cg.PollingComponent)
 
 
-def validate_lcd_dimensions(value):
+def validate_lcd_dimensions(value: Any) -> list[int]:
     value = cv.dimensions(value)
     if value[0] > 0x40:
         raise cv.Invalid("LCD displays can't have more than 64 columns")
@@ -18,7 +22,7 @@ def validate_lcd_dimensions(value):
     return value
 
 
-def validate_user_characters(value):
+def validate_user_characters(value: list[ConfigType]) -> list[ConfigType]:
     positions = set()
     for conf in value:
         if conf[CONF_POSITION] in positions:
@@ -51,7 +55,7 @@ LCD_SCHEMA = display.BASIC_DISPLAY_SCHEMA.extend(
 ).extend(cv.polling_component_schema("1s"))
 
 
-async def setup_lcd_display(var, config):
+async def setup_lcd_display(var: MockObj, config: ConfigType) -> None:
     await display.register_display(var, config)
     cg.add(var.set_dimensions(config[CONF_DIMENSIONS][0], config[CONF_DIMENSIONS][1]))
     if CONF_USER_CHARACTERS in config:
diff --git a/esphome/components/ld6002b/__init__.py b/esphome/components/ld6002b/__init__.py
index 99f2ead3bb..af1e501a6a 100644
--- a/esphome/components/ld6002b/__init__.py
+++ b/esphome/components/ld6002b/__init__.py
@@ -60,7 +60,7 @@ FINAL_VALIDATE_SCHEMA = uart.final_validate_device_schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await uart.register_uart_device(var, config)
diff --git a/esphome/components/ld6002b/binary_sensor.py b/esphome/components/ld6002b/binary_sensor.py
index 63f7b40c23..74095d5ded 100644
--- a/esphome/components/ld6002b/binary_sensor.py
+++ b/esphome/components/ld6002b/binary_sensor.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import binary_sensor
 import esphome.config_validation as cv
 from esphome.const import CONF_TARGET, DEVICE_CLASS_OCCUPANCY
+from esphome.types import ConfigType
 
 from . import LD6002BComponent
 from .const import AREA_COUNT, CONF_LD6002B_ID, MAX_TARGETS
@@ -36,7 +37,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_LD6002B_ID])
 
     if target_config := config.get(CONF_TARGET):
diff --git a/esphome/components/ld6002b/button/__init__.py b/esphome/components/ld6002b/button/__init__.py
index 508d5c2bc6..a664890a86 100644
--- a/esphome/components/ld6002b/button/__init__.py
+++ b/esphome/components/ld6002b/button/__init__.py
@@ -129,7 +129,7 @@ BUTTON_MAP = {
 }
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     for key, button_type in BUTTON_MAP.items():
         if button_config := config.get(key):
             b = cg.new_Pvariable(button_config[CONF_ID], button_type)
diff --git a/esphome/components/ld6002b/number/__init__.py b/esphome/components/ld6002b/number/__init__.py
index 452e38d6e3..236b049f53 100644
--- a/esphome/components/ld6002b/number/__init__.py
+++ b/esphome/components/ld6002b/number/__init__.py
@@ -136,7 +136,7 @@ def final_validate(config: ConfigType) -> None:
 FINAL_VALIDATE_SCHEMA = final_validate
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_LD6002B_ID])
 
     for key, number_type, setter, min_value, max_value, step in (
diff --git a/esphome/components/ld6002b/select/__init__.py b/esphome/components/ld6002b/select/__init__.py
index 3da647ee2c..7f5e528b84 100644
--- a/esphome/components/ld6002b/select/__init__.py
+++ b/esphome/components/ld6002b/select/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import select
 import esphome.config_validation as cv
 from esphome.const import CONF_AREA_ID, CONF_SENSITIVITY, ENTITY_CATEGORY_CONFIG
+from esphome.types import ConfigType
 
 from .. import LD6002BComponent, ld6002b_ns
 from ..const import CONF_INSTALLATION_MODE, CONF_LD6002B_ID, CONF_TRIGGER_SPEED
@@ -64,7 +65,7 @@ SELECT_MAP = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_LD6002B_ID])
 
     for key, select_type, setter, options in SELECT_MAP:
diff --git a/esphome/components/ld6002b/sensor.py b/esphome/components/ld6002b/sensor.py
index 3aedaf9fdd..cceefb3837 100644
--- a/esphome/components/ld6002b/sensor.py
+++ b/esphome/components/ld6002b/sensor.py
@@ -9,6 +9,7 @@ from esphome.const import (
     STATE_CLASS_MEASUREMENT,
     UNIT_METER,
 )
+from esphome.types import ConfigType
 
 from . import LD6002BComponent
 from .const import (
@@ -150,7 +151,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_LD6002B_ID])
 
     if target_count_config := config.get(CONF_TARGET_COUNT):
diff --git a/esphome/components/ld6002b/switch/__init__.py b/esphome/components/ld6002b/switch/__init__.py
index d27baa87fe..a414308b65 100644
--- a/esphome/components/ld6002b/switch/__init__.py
+++ b/esphome/components/ld6002b/switch/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import switch
 import esphome.config_validation as cv
 from esphome.const import DEVICE_CLASS_SWITCH, ENTITY_CATEGORY_CONFIG
+from esphome.types import ConfigType
 
 from .. import LD6002BComponent, ld6002b_ns
 from ..const import (
@@ -46,7 +47,7 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_LD6002B_ID])
 
     for key, switch_type, setter in (
diff --git a/esphome/components/ld6002b/text_sensor.py b/esphome/components/ld6002b/text_sensor.py
index a18d387437..0e8e2e80e7 100644
--- a/esphome/components/ld6002b/text_sensor.py
+++ b/esphome/components/ld6002b/text_sensor.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import text_sensor
 import esphome.config_validation as cv
 from esphome.const import ENTITY_CATEGORY_DIAGNOSTIC
+from esphome.types import ConfigType
 
 from . import LD6002BComponent
 from .const import CONF_LD6002B_ID, CONF_OTA_VERSION, CONF_WORK_MODE
@@ -21,7 +22,7 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_LD6002B_ID])
     if work_mode_config := config.get(CONF_WORK_MODE):
         sens = await text_sensor.new_text_sensor(work_mode_config)
diff --git a/esphome/components/libretiny_pwm/output.py b/esphome/components/libretiny_pwm/output.py
index 6f71530aaf..716ccfad2b 100644
--- a/esphome/components/libretiny_pwm/output.py
+++ b/esphome/components/libretiny_pwm/output.py
@@ -3,6 +3,9 @@ import esphome.codegen as cg
 from esphome.components import output
 import esphome.config_validation as cv
 from esphome.const import CONF_FREQUENCY, CONF_ID, CONF_PIN
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 DEPENDENCIES = ["libretiny"]
 
@@ -21,7 +24,7 @@ CONFIG_SCHEMA = output.FLOAT_OUTPUT_SCHEMA.extend(
 ).extend(cv.COMPONENT_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     gpio = await cg.gpio_pin_expression(config[CONF_PIN])
     var = cg.new_Pvariable(config[CONF_ID], gpio)
     await cg.register_component(var, config)
@@ -40,7 +43,12 @@ async def to_code(config):
     ),
     synchronous=True,
 )
-async def libretiny_pwm_set_frequency_to_code(config, action_id, template_arg, args):
+async def libretiny_pwm_set_frequency_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, paren)
     template_ = await cg.templatable(config[CONF_FREQUENCY], args, cg.float_)
diff --git a/esphome/components/lightwaverf/__init__.py b/esphome/components/lightwaverf/__init__.py
index 76eabc2b71..0f42083cb5 100644
--- a/esphome/components/lightwaverf/__init__.py
+++ b/esphome/components/lightwaverf/__init__.py
@@ -11,7 +11,10 @@ from esphome.const import (
     CONF_REPEAT,
     CONF_WRITE_PIN,
 )
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
 from esphome.cpp_helpers import gpio_pin_expression
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@max246"]
 
@@ -57,7 +60,12 @@ LIGHTWAVE_SEND_SCHEMA = cv.Any(
     LIGHTWAVE_SEND_SCHEMA,
     synchronous=True,
 )
-async def send_raw_to_code(config, action_id, template_arg, args):
+async def send_raw_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, paren)
 
@@ -71,7 +79,7 @@ async def send_raw_to_code(config, action_id, template_arg, args):
     return var
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
 
diff --git a/esphome/components/lock/__init__.py b/esphome/components/lock/__init__.py
index 0a8ad58bc2..a4a7b5237d 100644
--- a/esphome/components/lock/__init__.py
+++ b/esphome/components/lock/__init__.py
@@ -12,13 +12,14 @@ from esphome.const import (
     CONF_ON_UNLOCK,
     CONF_WEB_SERVER,
 )
-from esphome.core import CORE, CoroPriority, coroutine_with_priority
+from esphome.core import CORE, ID, CoroPriority, coroutine_with_priority
 from esphome.core.entity_helpers import (
     entity_duplicate_validator,
     queue_entity_register,
     setup_entity,
 )
-from esphome.cpp_generator import MockObjClass
+from esphome.cpp_generator import MockObj, MockObjClass, TemplateArgsType
+from esphome.types import ConfigType, SafeExpType
 
 CODEOWNERS = ["@esphome/core"]
 IS_PLATFORM_COMPONENT = True
@@ -102,7 +103,7 @@ _CALLBACK_AUTOMATIONS = (
 
 
 @setup_entity("lock")
-async def _setup_lock_core(var, config):
+async def _setup_lock_core(var: MockObj, config: ConfigType) -> None:
     await automation.build_callback_automations(var, config, _CALLBACK_AUTOMATIONS)
 
     if mqtt_id := config.get(CONF_MQTT_ID):
@@ -113,7 +114,7 @@ async def _setup_lock_core(var, config):
         await web_server.add_entity_config(var, web_server_config)
 
 
-async def register_lock(var, config):
+async def register_lock(var: MockObj, config: ConfigType) -> None:
     if not CORE.has_id(config[CONF_ID]):
         var = cg.Pvariable(config[CONF_ID], var)
     queue_entity_register("lock", config)
@@ -121,7 +122,7 @@ async def register_lock(var, config):
     await _setup_lock_core(var, config)
 
 
-async def new_lock(config, *args):
+async def new_lock(config: ConfigType, *args: SafeExpType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID], *args)
     await register_lock(var, config)
     return var
@@ -143,23 +144,38 @@ LOCK_ACTION_SCHEMA = maybe_simple_id(
 @automation.register_action(
     "lock.open", OpenAction, LOCK_ACTION_SCHEMA, synchronous=True
 )
-async def lock_action_to_code(config, action_id, template_arg, args):
+async def lock_action_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
 
 
 @automation.register_condition("lock.is_locked", LockCondition, LOCK_ACTION_SCHEMA)
-async def lock_is_on_to_code(config, condition_id, template_arg, args):
+async def lock_is_on_to_code(
+    config: ConfigType,
+    condition_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(condition_id, template_arg, paren, True)
 
 
 @automation.register_condition("lock.is_unlocked", LockCondition, LOCK_ACTION_SCHEMA)
-async def lock_is_off_to_code(config, condition_id, template_arg, args):
+async def lock_is_off_to_code(
+    config: ConfigType,
+    condition_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(condition_id, template_arg, paren, False)
 
 
 @coroutine_with_priority(CoroPriority.CORE)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_global(lock_ns.using)
diff --git a/esphome/components/m5stack_8angle/__init__.py b/esphome/components/m5stack_8angle/__init__.py
index a1c197b381..6404bcf64c 100644
--- a/esphome/components/m5stack_8angle/__init__.py
+++ b/esphome/components/m5stack_8angle/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import i2c
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.types import ConfigType
 
 DEPENDENCIES = ["i2c"]
 CODEOWNERS = ["@rnauber"]
@@ -26,7 +27,7 @@ CONFIG_SCHEMA = cv.Schema(
 ).extend(i2c.i2c_device_schema(0x43))
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
diff --git a/esphome/components/m5stack_8angle/binary_sensor/__init__.py b/esphome/components/m5stack_8angle/binary_sensor/__init__.py
index 22ab73e901..09398876d4 100644
--- a/esphome/components/m5stack_8angle/binary_sensor/__init__.py
+++ b/esphome/components/m5stack_8angle/binary_sensor/__init__.py
@@ -1,6 +1,7 @@
 import esphome.codegen as cg
 from esphome.components import binary_sensor
 import esphome.config_validation as cv
+from esphome.types import ConfigType
 
 from .. import CONF_M5STACK_8ANGLE_ID, M5Stack8AngleComponent, m5stack_8angle_ns
 
@@ -22,7 +23,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_M5STACK_8ANGLE_ID])
     sens = await binary_sensor.new_binary_sensor(config)
     cg.add(sens.set_parent(hub))
diff --git a/esphome/components/m5stack_8angle/light/__init__.py b/esphome/components/m5stack_8angle/light/__init__.py
index 806ecaabf4..5c4863acf7 100644
--- a/esphome/components/m5stack_8angle/light/__init__.py
+++ b/esphome/components/m5stack_8angle/light/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import light
 import esphome.config_validation as cv
 from esphome.const import CONF_OUTPUT_ID
+from esphome.types import ConfigType
 
 from .. import CONF_M5STACK_8ANGLE_ID, M5Stack8AngleComponent, m5stack_8angle_ns
 
@@ -21,7 +22,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_M5STACK_8ANGLE_ID])
     lights = cg.new_Pvariable(config[CONF_OUTPUT_ID])
     await light.register_light(lights, config)
diff --git a/esphome/components/m5stack_8angle/sensor/__init__.py b/esphome/components/m5stack_8angle/sensor/__init__.py
index 2132eaa4c2..87d1425241 100644
--- a/esphome/components/m5stack_8angle/sensor/__init__.py
+++ b/esphome/components/m5stack_8angle/sensor/__init__.py
@@ -8,6 +8,7 @@ from esphome.const import (
     ICON_ROTATE_RIGHT,
     STATE_CLASS_MEASUREMENT,
 )
+from esphome.types import ConfigType
 
 from .. import (
     CONF_M5STACK_8ANGLE_ID,
@@ -55,7 +56,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await sensor.new_sensor(config)
     await cg.register_component(var, config)
     await cg.register_parented(var, config[CONF_M5STACK_8ANGLE_ID])
diff --git a/esphome/components/max17043/sensor.py b/esphome/components/max17043/sensor.py
index ebb045dfce..67fb8aa5b7 100644
--- a/esphome/components/max17043/sensor.py
+++ b/esphome/components/max17043/sensor.py
@@ -14,6 +14,9 @@ from esphome.const import (
     UNIT_PERCENT,
     UNIT_VOLT,
 )
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 DEPENDENCIES = ["i2c"]
 
@@ -50,7 +53,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
@@ -74,6 +77,11 @@ MAX17043_ACTION_SCHEMA = maybe_simple_id(
 @automation.register_action(
     "max17043.sleep_mode", SleepAction, MAX17043_ACTION_SCHEMA, synchronous=True
 )
-async def max17043_sleep_mode_to_code(config, action_id, template_arg, args):
+async def max17043_sleep_mode_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
diff --git a/esphome/components/mhz19/sensor.py b/esphome/components/mhz19/sensor.py
index b7d0ad1998..33cb27080c 100644
--- a/esphome/components/mhz19/sensor.py
+++ b/esphome/components/mhz19/sensor.py
@@ -15,6 +15,9 @@ from esphome.const import (
     UNIT_CELSIUS,
     UNIT_PARTS_PER_MILLION,
 )
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 DEPENDENCIES = ["uart"]
 
@@ -78,7 +81,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await uart.register_uart_device(var, config)
@@ -129,7 +132,12 @@ NO_ARGS_ACTION_SCHEMA = maybe_simple_id(
     NO_ARGS_ACTION_SCHEMA,
     synchronous=True,
 )
-async def mhz19_no_args_action_to_code(config, action_id, template_arg, args):
+async def mhz19_no_args_action_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     return var
@@ -151,7 +159,12 @@ RANGE_ACTION_SCHEMA = maybe_simple_id(
     RANGE_ACTION_SCHEMA,
     synchronous=True,
 )
-async def mhz19_detection_range_set_to_code(config, action_id, template_arg, args):
+async def mhz19_detection_range_set_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     detection_range = config.get(CONF_DETECTION_RANGE)
diff --git a/esphome/components/mipi_spi/mipi_spi.h b/esphome/components/mipi_spi/mipi_spi.h
index b269f46dc9..2552451bd7 100644
--- a/esphome/components/mipi_spi/mipi_spi.h
+++ b/esphome/components/mipi_spi/mipi_spi.h
@@ -246,33 +246,36 @@ class MipiSpi : public display::Display,
       this->write_cmd_addr_data(8, 0x02, 24, cmd << 8, bytes, len);
       this->disable();
     } else if constexpr (BUS_TYPE == BUS_TYPE_OCTAL) {
-      this->dc_pin_->digital_write(false);
+      // Toggle D/C only while holding the bus; on boards where D/C doubles as
+      // another bus signal, driving it while another device owns the bus
+      // corrupts that device's transfer.
       this->enable();
+      this->dc_pin_->digital_write(false);
       this->write_cmd_addr_data(0, 0, 0, 0, &cmd, 1, 8);
-      this->disable();
       this->dc_pin_->digital_write(true);
+      this->disable();
       if (len != 0) {
         this->enable();
         this->write_cmd_addr_data(0, 0, 0, 0, bytes, len, 8);
         this->disable();
       }
     } else if constexpr (BUS_TYPE == BUS_TYPE_SINGLE) {
-      this->dc_pin_->digital_write(false);
       this->enable();
+      this->dc_pin_->digital_write(false);
       this->write_byte(cmd);
-      this->disable();
       this->dc_pin_->digital_write(true);
+      this->disable();
       if (len != 0) {
         this->enable();
         this->write_array(bytes, len);
         this->disable();
       }
     } else if constexpr (BUS_TYPE == BUS_TYPE_SINGLE_16) {
-      this->dc_pin_->digital_write(false);
       this->enable();
+      this->dc_pin_->digital_write(false);
       this->write_byte(cmd);
-      this->disable();
       this->dc_pin_->digital_write(true);
+      this->disable();
       for (size_t i = 0; i != len; i++) {
         this->enable();
         this->write_byte(0);
diff --git a/esphome/components/mitsubishi_cn105/__init__.py b/esphome/components/mitsubishi_cn105/__init__.py
index 450d1cd222..470b7be5fc 100644
--- a/esphome/components/mitsubishi_cn105/__init__.py
+++ b/esphome/components/mitsubishi_cn105/__init__.py
@@ -8,6 +8,7 @@ from esphome.const import (
     CONF_ON_STATE,
     CONF_TEMPERATURE,
     CONF_UPDATE_INTERVAL,
+    CONF_USE_FAHRENHEIT,
 )
 from esphome.core import ID, Lambda
 from esphome.cpp_generator import LambdaExpression, MockObj
@@ -71,6 +72,7 @@ CONFIG_SCHEMA = (
             cv.Optional(
                 CONF_TELEMETRY_REQUEST_MIN_INTERVAL, default="60s"
             ): cv.update_interval,
+            cv.Optional(CONF_USE_FAHRENHEIT, default=False): cv.boolean,
             cv.Optional(CONF_VANE): cv.Schema(
                 {
                     cv.Optional(CONF_ON_STATE): automation.validate_automation({}),
@@ -114,6 +116,7 @@ async def to_code(config: ConfigType) -> None:
             config[CONF_TELEMETRY_REQUEST_MIN_INTERVAL]
         )
     )
+    cg.add(var.set_use_fahrenheit(config[CONF_USE_FAHRENHEIT]))
     if on_state := config.get(CONF_VANE, {}).get(CONF_ON_STATE):
         cg.add_global(mitsubishi_ns.using)
         for conf in on_state:
diff --git a/esphome/components/mitsubishi_cn105/mitsubishi_cn105.h b/esphome/components/mitsubishi_cn105/mitsubishi_cn105.h
index b6b11b4820..4d3f899dee 100644
--- a/esphome/components/mitsubishi_cn105/mitsubishi_cn105.h
+++ b/esphome/components/mitsubishi_cn105/mitsubishi_cn105.h
@@ -83,6 +83,7 @@ class MitsubishiCN105 {
     return this->is_telemetry_polling_enabled() ? !std::isnan(this->status_.room_temperature)
                                                 : !std::isnan(this->status_.target_temperature);
   }
+  bool is_temperature_encoding_b() const { return this->property_context_.use_temperature_encoding_b; }
 
   void set_power(bool power_on);
   void set_target_temperature(float target_temperature);
diff --git a/esphome/components/mitsubishi_cn105/mitsubishi_cn105_climate.cpp b/esphome/components/mitsubishi_cn105/mitsubishi_cn105_climate.cpp
index 197e1e1bb5..17ff6d34ca 100644
--- a/esphome/components/mitsubishi_cn105/mitsubishi_cn105_climate.cpp
+++ b/esphome/components/mitsubishi_cn105/mitsubishi_cn105_climate.cpp
@@ -50,7 +50,11 @@ static constexpr std::optional<Left> reverse_map_lookup(const std::array<std::pa
   return key.has_value() ? reverse_map_lookup(map, *key) : std::nullopt;
 }
 
-void MitsubishiCN105Climate::dump_config() { LOG_CLIMATE("", "Mitsubishi CN105 Climate", this); }
+void MitsubishiCN105Climate::dump_config() {
+  LOG_CLIMATE("", "Mitsubishi CN105 Climate", this);
+  ESP_LOGCONFIG(TAG, "  Temperature unit: °%c",
+                this->parent_->get_temperature_mapping().get_use_fahrenheit() ? 'F' : 'C');
+}
 
 void MitsubishiCN105Climate::setup() {
   this->parent_->add_on_status_callback([this]() { this->apply_values_(); });
@@ -72,13 +76,15 @@ climate::ClimateTraits MitsubishiCN105Climate::traits() {
 
   traits.set_supported_swing_modes(this->supported_swing_modes_);
 
-  traits.set_visual_min_temperature(16.0f);
-  traits.set_visual_max_temperature(31.0f);
+  const bool use_fahrenheit = this->parent_->get_temperature_mapping().get_use_fahrenheit();
+  traits.set_temperature_unit(use_fahrenheit ? TemperatureUnit::FAHRENHEIT : TemperatureUnit::CELSIUS);
+  traits.set_visual_min_temperature(use_fahrenheit ? 61.0f : 16.0f);
+  traits.set_visual_max_temperature(use_fahrenheit ? 88.0f : 31.0f);
   traits.set_visual_temperature_step(1.0f);
 
   if (this->parent_->is_telemetry_polling_enabled()) {
     traits.add_feature_flags(climate::CLIMATE_SUPPORTS_CURRENT_TEMPERATURE);
-    traits.set_visual_current_temperature_step(0.5f);
+    traits.set_visual_current_temperature_step(use_fahrenheit ? 1.0f : 0.5f);
   }
 
   return traits;
@@ -86,7 +92,7 @@ climate::ClimateTraits MitsubishiCN105Climate::traits() {
 
 void MitsubishiCN105Climate::control(const climate::ClimateCall &call) {
   if (const auto target_temperature = call.get_target_temperature()) {
-    this->parent_->set_target_temperature(*target_temperature);
+    this->parent_->set_target_temperature(this->parent_->get_temperature_mapping().to_mitsubishi(*target_temperature));
   }
 
   if (const auto mode = call.get_mode()) {
@@ -139,10 +145,10 @@ void MitsubishiCN105Climate::control(const climate::ClimateCall &call) {
 void MitsubishiCN105Climate::apply_values_() {
   const auto &status = this->parent_->status();
 
-  this->target_temperature = status.target_temperature;
+  this->target_temperature = this->parent_->get_temperature_mapping().from_mitsubishi(status.target_temperature);
 
   if (this->parent_->is_telemetry_polling_enabled()) {
-    this->current_temperature = status.room_temperature;
+    this->current_temperature = this->parent_->get_temperature_mapping().from_mitsubishi(status.room_temperature);
   }
 
   if (status.power_on) {
diff --git a/esphome/components/mitsubishi_cn105/mitsubishi_cn105_component.cpp b/esphome/components/mitsubishi_cn105/mitsubishi_cn105_component.cpp
index 8e9e954645..e2a6ee05af 100644
--- a/esphome/components/mitsubishi_cn105/mitsubishi_cn105_component.cpp
+++ b/esphome/components/mitsubishi_cn105/mitsubishi_cn105_component.cpp
@@ -27,6 +27,13 @@ void MitsubishiCN105Component::setup() { this->hp_.initialize(); }
 
 void MitsubishiCN105Component::loop() {
   if (this->hp_.update()) {
+    // Encoding A only supports whole °C values and cannot represent native °F setpoints accurately.
+    // See https://github.com/esphome/esphome/pull/15488#issuecomment-5268304343
+    if (this->temperature_mapping_.get_use_fahrenheit() && !this->hp_.is_temperature_encoding_b()) {
+      ESP_LOGE(TAG, "Unit reports encoding A, which cannot accurately convert °F setpoints; disable 'use_fahrenheit'");
+      this->mark_failed();
+      return;
+    }
     this->notify_status_listeners_();
   }
 }
diff --git a/esphome/components/mitsubishi_cn105/mitsubishi_cn105_component.h b/esphome/components/mitsubishi_cn105/mitsubishi_cn105_component.h
index 6461fb464b..508a15e6d5 100644
--- a/esphome/components/mitsubishi_cn105/mitsubishi_cn105_component.h
+++ b/esphome/components/mitsubishi_cn105/mitsubishi_cn105_component.h
@@ -3,13 +3,43 @@
 #include "mitsubishi_cn105.h"
 
 #include "esphome/core/component.h"
+#include "esphome/core/helpers.h"
 #include "esphome/components/uart/uart.h"
 
-#include <utility>
+#include <algorithm>
+#include <cmath>
 #include <optional>
+#include <utility>
 
 namespace esphome::mitsubishi_cn105 {
 
+struct TemperatureMapping {
+  float to_mitsubishi(float value) const {
+    if (!this->use_fahrenheit_) {
+      return value;
+    }
+    const int fahrenheit = std::clamp(static_cast<int>(std::round(value)), 61, 88);
+    return 0.5f * (fahrenheit - 28 + (fahrenheit > 68) - (fahrenheit < 68));
+  }
+
+  float from_mitsubishi(float value) const {
+    if (!this->use_fahrenheit_) {
+      return value;
+    }
+    if (value < 16.0f || value > 30.5f) {
+      return celsius_to_fahrenheit(value);
+    }
+    const int mitsubishi_half_degrees = static_cast<int>(std::round(value * 2.0f));
+    return mitsubishi_half_degrees + 29 - (mitsubishi_half_degrees >= 40) - (mitsubishi_half_degrees > 40);
+  }
+
+  bool get_use_fahrenheit() const { return this->use_fahrenheit_; }
+  void set_use_fahrenheit(bool value) { this->use_fahrenheit_ = value; }
+
+ protected:
+  bool use_fahrenheit_{false};
+};
+
 enum VerticalVaneMode : uint8_t {
   VERTICAL_VANE_MODE_AUTO = static_cast<uint8_t>(MitsubishiCN105::VaneMode::AUTO),
   VERTICAL_VANE_MODE_POSITION_1 = static_cast<uint8_t>(MitsubishiCN105::VaneMode::POSITION_1),
@@ -60,6 +90,7 @@ class MitsubishiCN105Component : public Component, public uart::UARTDevice {
 
   void set_update_interval(uint32_t ms) { this->hp_.set_update_interval(ms); }
   void set_telemetry_request_min_interval(uint32_t ms) { this->hp_.set_telemetry_request_min_interval(ms); }
+  void set_use_fahrenheit(bool value) { this->temperature_mapping_.set_use_fahrenheit(value); }
 
   void set_remote_temperature(float temperature) { this->hp_.set_remote_temperature(temperature); }
   void clear_remote_temperature() { this->hp_.clear_remote_temperature(); }
@@ -75,6 +106,7 @@ class MitsubishiCN105Component : public Component, public uart::UARTDevice {
   const MitsubishiCN105::Status &status() const { return this->hp_.status(); }
   bool is_status_initialized() const { return this->hp_.is_status_initialized(); }
   bool is_telemetry_polling_enabled() const { return this->hp_.is_telemetry_polling_enabled(); }
+  const TemperatureMapping &get_temperature_mapping() const { return this->temperature_mapping_; }
 
   template<typename F> void add_on_status_callback(F &&callback) {
     this->status_callback_.add(std::forward<F>(callback));
@@ -99,6 +131,7 @@ class MitsubishiCN105Component : public Component, public uart::UARTDevice {
   }
 
   MitsubishiCN105 hp_;
+  TemperatureMapping temperature_mapping_;
   CallbackManager<void()> status_callback_;
   LazyCallbackManager<void(const VaneState &)> vane_state_callback_;
 };
diff --git a/esphome/components/modbus/__init__.py b/esphome/components/modbus/__init__.py
index 58bd0f65dc..a98591c6bc 100644
--- a/esphome/components/modbus/__init__.py
+++ b/esphome/components/modbus/__init__.py
@@ -8,8 +8,10 @@ import esphome.codegen as cg
 from esphome.components import uart
 import esphome.config_validation as cv
 from esphome.const import CONF_ADDRESS, CONF_DISABLE_CRC, CONF_FLOW_CONTROL_PIN, CONF_ID
+from esphome.cpp_generator import MockObj
 from esphome.cpp_helpers import gpio_pin_expression
 import esphome.final_validate as fv
+from esphome.types import ConfigType
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -84,7 +86,7 @@ CONFIG_SCHEMA = cv.typed_schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_global(modbus_ns.using)
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
@@ -112,7 +114,9 @@ def _validate_server_address(value: Any) -> int:
     return address
 
 
-def modbus_device_schema(default_address, role: Literal["client", "server"] = "client"):
+def modbus_device_schema(
+    default_address: int | None, role: Literal["client", "server"] = "client"
+) -> cv.Schema:
     hub_type = ModbusClient if role == "client" else ModbusServer
     address_validator = _validate_server_address if role == "server" else cv.hex_uint8_t
     schema = {
@@ -127,14 +131,14 @@ def modbus_device_schema(default_address, role: Literal["client", "server"] = "c
 
 def final_validate_modbus_device(
     name: str, *, role: Literal["server", "client"] | None = None
-):
-    def validate_role(value):
+) -> cv.Schema:
+    def validate_role(value: str) -> str:
         assert role in MODBUS_ROLES
         if value != role:
             raise cv.Invalid(f"Component {name} requires role to be {role}")
         return value
 
-    def validate_hub(hub_config):
+    def validate_hub(hub_config: ConfigType) -> ConfigType:
         hub_schema = {}
         if role is not None:
             hub_schema[cv.Required(CONF_ROLE)] = validate_role
@@ -147,19 +151,19 @@ def final_validate_modbus_device(
     )
 
 
-async def register_modbus_client_device(var, config):
+async def register_modbus_client_device(var: MockObj, config: ConfigType) -> None:
     parent = await cg.get_variable(config[CONF_MODBUS_ID])
     cg.add(var.set_parent(parent))
     cg.add(var.set_address(config[CONF_ADDRESS]))
 
 
-async def register_modbus_server_device(var, config):
+async def register_modbus_server_device(var: MockObj, config: ConfigType) -> None:
     parent = await cg.get_variable(config[CONF_MODBUS_ID])
     cg.add(var.set_address(config[CONF_ADDRESS]))
     cg.add(parent.register_device(var))
 
 
-async def register_modbus_device(var, config):
+async def register_modbus_device(var: MockObj, config: ConfigType) -> None:
     # Remove before 2026.12.0
     _LOGGER.warning(
         "'register_modbus_device' is deprecated, use 'register_modbus_client_device' "
diff --git a/esphome/components/mpr121/__init__.py b/esphome/components/mpr121/__init__.py
index 0bf9377275..da56b4ff4b 100644
--- a/esphome/components/mpr121/__init__.py
+++ b/esphome/components/mpr121/__init__.py
@@ -12,7 +12,9 @@ from esphome.const import (
     CONF_NUMBER,
     CONF_OUTPUT,
 )
+from esphome.cpp_generator import MockObj
 import esphome.final_validate as fv
+from esphome.types import ConfigType
 
 CONF_TOUCH_THRESHOLD = "touch_threshold"
 CONF_RELEASE_THRESHOLD = "release_threshold"
@@ -49,7 +51,7 @@ CONFIG_SCHEMA = (
 )
 
 
-def _final_validate(config):
+def _final_validate(config: ConfigType) -> None:
     fconf = fv.full_config.get()
     max_touch_channel = 3
     if (binary_sensors := fconf.get(CONF_BINARY_SENSOR)) is not None:
@@ -71,7 +73,7 @@ def _final_validate(config):
 FINAL_VALIDATE_SCHEMA = _final_validate
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     cg.add(var.set_touch_debounce(config[CONF_TOUCH_DEBOUNCE]))
     cg.add(var.set_release_debounce(config[CONF_RELEASE_DEBOUNCE]))
@@ -82,7 +84,7 @@ async def to_code(config):
     await i2c.register_i2c_device(var, config)
 
 
-def validate_mode(value):
+def validate_mode(value: ConfigType) -> ConfigType:
     if bool(value[CONF_INPUT]) == bool(value[CONF_OUTPUT]):
         raise cv.Invalid("Mode must be either input or output")
     return value
@@ -105,7 +107,9 @@ MPR121_GPIO_PIN_SCHEMA = pins.gpio_base_schema(
 )
 
 
-def mpr121_pin_final_validate(pin_config, parent_config):
+def mpr121_pin_final_validate(
+    pin_config: ConfigType, parent_config: ConfigType
+) -> None:
     if pin_config[CONF_NUMBER] <= parent_config[CONF_MAX_TOUCH_CHANNEL]:
         raise cv.Invalid(
             "Pin number must be higher than the max touch channel of the MPR121 component",
@@ -115,7 +119,7 @@ def mpr121_pin_final_validate(pin_config, parent_config):
 @pins.PIN_SCHEMA_REGISTRY.register(
     CONF_MPR121, MPR121_GPIO_PIN_SCHEMA, mpr121_pin_final_validate
 )
-async def mpr121_gpio_pin_to_code(config):
+async def mpr121_gpio_pin_to_code(config: ConfigType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID])
     parent = await cg.get_variable(config[CONF_MPR121])
 
diff --git a/esphome/components/mpr121/binary_sensor/__init__.py b/esphome/components/mpr121/binary_sensor/__init__.py
index 1252a65a84..565789cdc3 100644
--- a/esphome/components/mpr121/binary_sensor/__init__.py
+++ b/esphome/components/mpr121/binary_sensor/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import binary_sensor
 import esphome.config_validation as cv
 from esphome.const import CONF_CHANNEL
+from esphome.types import ConfigType
 
 from .. import (
     CONF_MPR121_ID,
@@ -24,7 +25,7 @@ CONFIG_SCHEMA = binary_sensor.binary_sensor_schema(MPR121BinarySensor).extend(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await binary_sensor.new_binary_sensor(config)
     hub = await cg.get_variable(config[CONF_MPR121_ID])
     cg.add(var.set_channel(config[CONF_CHANNEL]))
diff --git a/esphome/components/mqtt/mqtt_climate.cpp b/esphome/components/mqtt/mqtt_climate.cpp
index d5ee4c6a9b..0e6a374f9b 100644
--- a/esphome/components/mqtt/mqtt_climate.cpp
+++ b/esphome/components/mqtt/mqtt_climate.cpp
@@ -118,8 +118,7 @@ void MQTTClimateComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryCo
   root[MQTT_TARGET_TEMPERATURE_STEP] = roundf(traits.get_visual_target_temperature_step() * 10) * 0.1f;
   // current_temp_step
   root[MQTT_CURRENT_TEMPERATURE_STEP] = roundf(traits.get_visual_current_temperature_step() * 10) * 0.1f;
-  // temperature units are always coerced to Celsius internally
-  root[MQTT_TEMPERATURE_UNIT] = "C";
+  root[MQTT_TEMPERATURE_UNIT] = traits.get_temperature_unit() == TemperatureUnit::FAHRENHEIT ? "F" : "C";
 
   // min_humidity
   root[MQTT_MIN_HUMIDITY] = traits.get_visual_min_humidity();
diff --git a/esphome/components/nau7802/sensor.py b/esphome/components/nau7802/sensor.py
index 9798c1c297..415ae09daf 100644
--- a/esphome/components/nau7802/sensor.py
+++ b/esphome/components/nau7802/sensor.py
@@ -4,6 +4,9 @@ import esphome.codegen as cg
 from esphome.components import i2c, sensor
 import esphome.config_validation as cv
 from esphome.const import CONF_GAIN, CONF_ID, ICON_SCALE, STATE_CLASS_MEASUREMENT
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@cujomalainey"]
 DEPENDENCIES = ["i2c"]
@@ -93,7 +96,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
@@ -131,7 +134,12 @@ NAU7802_CALIBRATE_SCHEMA = maybe_simple_id(
     NAU7802_CALIBRATE_SCHEMA,
     synchronous=True,
 )
-async def nau7802_calibrate_to_code(config, action_id, template_arg, args):
+async def nau7802_calibrate_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     return var
diff --git a/esphome/components/ntc/sensor.py b/esphome/components/ntc/sensor.py
index dd7d1bd35d..6c2cb69990 100644
--- a/esphome/components/ntc/sensor.py
+++ b/esphome/components/ntc/sensor.py
@@ -1,4 +1,5 @@
 from math import log
+from typing import Any
 
 import esphome.codegen as cg
 from esphome.components import sensor
@@ -15,6 +16,7 @@ from esphome.const import (
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
 )
+from esphome.types import ConfigType
 
 ntc_ns = cg.esphome_ns.namespace("ntc")
 NTC = ntc_ns.class_("NTC", cg.Component, sensor.Sensor)
@@ -25,7 +27,7 @@ CONF_C = "c"
 ZERO_POINT = 273.15
 
 
-def validate_calibration_parameter(value):
+def validate_calibration_parameter(value: Any) -> ConfigType:
     if isinstance(value, dict):
         return cv.Schema(
             {
@@ -48,7 +50,7 @@ def validate_calibration_parameter(value):
     )
 
 
-def calc_steinhart_hart(value):
+def calc_steinhart_hart(value: list[ConfigType]) -> tuple[float, float, float]:
     r1 = value[0][CONF_VALUE]
     r2 = value[1][CONF_VALUE]
     r3 = value[2][CONF_VALUE]
@@ -73,7 +75,7 @@ def calc_steinhart_hart(value):
     return a, b, c
 
 
-def calc_b(value):
+def calc_b(value: ConfigType) -> tuple[float, float, float]:
     beta = value[CONF_B_CONSTANT]
     t0 = value[CONF_REFERENCE_TEMPERATURE] + ZERO_POINT
     r0 = value[CONF_REFERENCE_RESISTANCE]
@@ -85,7 +87,7 @@ def calc_b(value):
     return a, b, c
 
 
-def process_calibration(value):
+def process_calibration(value: Any) -> ConfigType:
     if isinstance(value, dict):
         value = cv.Schema(
             {
@@ -132,7 +134,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await sensor.new_sensor(config)
     await cg.register_component(var, config)
 
diff --git a/esphome/components/online_image/online_image.cpp b/esphome/components/online_image/online_image.cpp
index 22bce4cc41..fe4f727cd6 100644
--- a/esphome/components/online_image/online_image.cpp
+++ b/esphome/components/online_image/online_image.cpp
@@ -216,7 +216,7 @@ void OnlineImage::loop() {
 }
 
 void OnlineImage::end_connection_() {
-  // Abort any in-progress decode to free decoder resources.
+  // Abort any in-progress decode; the decoder object is kept warm for the next decode.
   // Use RuntimeImage::release() directly to avoid recursion with OnlineImage::release().
   if (this->is_decoding()) {
     RuntimeImage::release();
diff --git a/esphome/components/openthread/__init__.py b/esphome/components/openthread/__init__.py
index 4018ad81e7..ab69f5d9ae 100644
--- a/esphome/components/openthread/__init__.py
+++ b/esphome/components/openthread/__init__.py
@@ -1,3 +1,5 @@
+from typing import Any
+
 from esphome import automation
 import esphome.codegen as cg
 from esphome.components.esp32 import (
@@ -31,10 +33,12 @@ from esphome.const import (
 )
 from esphome.core import (
     CORE,
+    ID,
     CoroPriority,
     TimePeriodMilliseconds,
     coroutine_with_priority,
 )
+from esphome.cpp_generator import MockObj, TemplateArgsType
 import esphome.final_validate as fv
 from esphome.types import ConfigType
 
@@ -76,7 +80,7 @@ CONF_DEVICE_TYPES = [
 ]
 
 
-def _validate_txpower(value):
+def _validate_txpower(value: Any) -> int | float:
     if CORE.is_esp32:
         variant = get_esp32_variant()
 
@@ -90,7 +94,7 @@ def _validate_txpower(value):
     return value  # Unsupported, fail later with clear error
 
 
-def set_sdkconfig_options(config):
+def set_sdkconfig_options(config: ConfigType) -> None:
     # and expose options for using SPI/UART RCPs
     add_idf_sdkconfig_option("CONFIG_IEEE802154_ENABLED", True)
     add_idf_sdkconfig_option("CONFIG_OPENTHREAD_RADIO_NATIVE", True)
@@ -180,7 +184,7 @@ def _validate(config: ConfigType) -> ConfigType:
     return config
 
 
-def _require_vfs_select(config):
+def _require_vfs_select(config: ConfigType) -> ConfigType:
     """Register VFS select requirement during config validation."""
     # OpenThread uses esp_vfs_eventfd which requires VFS select support (ESP32 only)
     if CORE.is_esp32:
@@ -188,7 +192,7 @@ def _require_vfs_select(config):
     return config
 
 
-def _validate_platform(config):
+def _validate_platform(config: ConfigType) -> ConfigType:
     if CORE.using_zephyr:
         return config
     return only_on_variant(
@@ -203,7 +207,7 @@ def _validate_platform(config):
     )(config)
 
 
-def _validate_tlv_hex(value):
+def _validate_tlv_hex(value: Any) -> str:
     s = cv.string_strict(value)
     if len(s) % 2 != 0:
         raise cv.Invalid("TLV must have an even number of hex characters")
@@ -242,7 +246,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-def _final_validate(_):
+def _final_validate(_: ConfigType) -> None:
     full_config = fv.full_config.get()
     network_config = full_config.get("network", {})
     if not network_config.get(CONF_ENABLE_IPV6, False):
@@ -274,7 +278,7 @@ FILTER_SOURCE_FILES = filter_source_files_from_platform(
 
 
 @coroutine_with_priority(CoroPriority.COMMUNICATION)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     # Re-enable openthread IDF component (excluded by default)
     if CORE.is_esp32:
         include_builtin_idf_component("openthread")
@@ -339,7 +343,12 @@ POLL_PERIOD_ACTION_SCHEMA = automation.maybe_conf(
     POLL_PERIOD_ACTION_SCHEMA,
     synchronous=True,
 )
-async def openthread_poll_period_action_to_code(config, action_id, template_arg, args):
+async def openthread_poll_period_action_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, paren)
     template_ = await cg.templatable(config[CONF_POLL_PERIOD], args, cg.uint32)
diff --git a/esphome/components/openthread_info/sensor.py b/esphome/components/openthread_info/sensor.py
index 4d5b3d54f4..e77b84e17c 100644
--- a/esphome/components/openthread_info/sensor.py
+++ b/esphome/components/openthread_info/sensor.py
@@ -9,6 +9,7 @@ from esphome.const import (
     UNIT_DECIBEL_MILLIWATT,
     UNIT_EMPTY,
 )
+from esphome.types import ConfigType
 
 CONF_PARENT_AVERAGE_RSSI = "parent_average_rssi"
 CONF_PARENT_LAST_RSSI = "parent_last_rssi"
@@ -166,13 +167,13 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def setup_conf(config: dict, key: str):
+async def setup_conf(config: dict, key: str) -> None:
     if conf := config.get(key):
         var = await sensor.new_sensor(conf)
         await cg.register_component(var, conf)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     await setup_conf(config, CONF_PARENT_AVERAGE_RSSI)
     await setup_conf(config, CONF_PARENT_LAST_RSSI)
     await setup_conf(config, CONF_PARENT_LINK_QUALITY_IN)
diff --git a/esphome/components/openthread_info/text_sensor.py b/esphome/components/openthread_info/text_sensor.py
index b672831bf0..da789ae706 100644
--- a/esphome/components/openthread_info/text_sensor.py
+++ b/esphome/components/openthread_info/text_sensor.py
@@ -8,6 +8,7 @@ from esphome.components.openthread.const import (
 )
 import esphome.config_validation as cv
 from esphome.const import CONF_CHANNEL, CONF_IP_ADDRESS, ENTITY_CATEGORY_DIAGNOSTIC
+from esphome.types import ConfigType
 
 CONF_ROLE = "role"
 CONF_RLOC16 = "rloc16"
@@ -86,13 +87,13 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def setup_conf(config: dict, key: str):
+async def setup_conf(config: dict, key: str) -> None:
     if conf := config.get(key):
         var = await text_sensor.new_text_sensor(conf)
         await cg.register_component(var, conf)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     await setup_conf(config, CONF_IP_ADDRESS)
     await setup_conf(config, CONF_ROLE)
     await setup_conf(config, CONF_RLOC16)
diff --git a/esphome/components/pcf85063/time.py b/esphome/components/pcf85063/time.py
index 8e19178cc9..771461905e 100644
--- a/esphome/components/pcf85063/time.py
+++ b/esphome/components/pcf85063/time.py
@@ -3,6 +3,9 @@ import esphome.codegen as cg
 from esphome.components import i2c, time
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@brogon"]
 DEPENDENCIES = ["i2c"]
@@ -31,7 +34,12 @@ CONFIG_SCHEMA = time.TIME_SCHEMA.extend(
     ),
     synchronous=True,
 )
-async def pcf85063_write_time_to_code(config, action_id, template_arg, args):
+async def pcf85063_write_time_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     return var
@@ -47,13 +55,18 @@ async def pcf85063_write_time_to_code(config, action_id, template_arg, args):
     ),
     synchronous=True,
 )
-async def pcf85063_read_time_to_code(config, action_id, template_arg, args):
+async def pcf85063_read_time_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     return var
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
 
     await cg.register_component(var, config)
diff --git a/esphome/components/pcf8563/time.py b/esphome/components/pcf8563/time.py
index 1502158c29..8a0b871be9 100644
--- a/esphome/components/pcf8563/time.py
+++ b/esphome/components/pcf8563/time.py
@@ -3,6 +3,9 @@ import esphome.codegen as cg
 from esphome.components import i2c, time
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@KoenBreeman"]
 
@@ -34,7 +37,12 @@ CONFIG_SCHEMA = time.TIME_SCHEMA.extend(
     ),
     synchronous=True,
 )
-async def pcf8563_write_time_to_code(config, action_id, template_arg, args):
+async def pcf8563_write_time_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     return var
@@ -50,13 +58,18 @@ async def pcf8563_write_time_to_code(config, action_id, template_arg, args):
     ),
     synchronous=True,
 )
-async def pcf8563_read_time_to_code(config, action_id, template_arg, args):
+async def pcf8563_read_time_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     return var
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
 
     await cg.register_component(var, config)
diff --git a/esphome/components/pcm5122/audio_dac.py b/esphome/components/pcm5122/audio_dac.py
index c18fb3993e..5091efabea 100644
--- a/esphome/components/pcm5122/audio_dac.py
+++ b/esphome/components/pcm5122/audio_dac.py
@@ -13,6 +13,8 @@ from esphome.const import (
     CONF_NUMBER,
     CONF_OUTPUT,
 )
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@remcom"]
 DEPENDENCIES = ["i2c"]
@@ -50,7 +52,7 @@ PCM5122_CHANNEL_MIX_ENUM = {
 _validate_bits = cv.float_with_unit("bits", "bit")
 
 
-def _validate_volume_range(config):
+def _validate_volume_range(config: ConfigType) -> ConfigType:
     if config[CONF_VOLUME_MIN_DB] >= config[CONF_VOLUME_MAX_DB]:
         raise cv.Invalid(f"{CONF_VOLUME_MIN_DB} must be less than {CONF_VOLUME_MAX_DB}")
     return config
@@ -90,7 +92,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-def _validate_pin_mode(value):
+def _validate_pin_mode(value: ConfigType) -> ConfigType:
     if not (value[CONF_INPUT] or value[CONF_OUTPUT]):
         raise cv.Invalid("Mode must be either input or output")
     if value[CONF_INPUT] and value[CONF_OUTPUT]:
@@ -98,7 +100,7 @@ def _validate_pin_mode(value):
     return value
 
 
-def _validate_pin(value):
+def _validate_pin(value: ConfigType) -> ConfigType:
     if value[CONF_MODE][CONF_INPUT] and value[CONF_NUMBER] == 6:
         raise cv.Invalid("GPIO6 cannot be used as input on the PCM5122")
     return value
@@ -120,7 +122,7 @@ PIN_SCHEMA = cv.All(
 
 
 @pins.PIN_SCHEMA_REGISTRY.register(CONF_PCM5122, PIN_SCHEMA)
-async def pcm5122_pin_to_code(config):
+async def pcm5122_pin_to_code(config: ConfigType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_parented(var, config[CONF_PCM5122])
 
@@ -130,7 +132,7 @@ async def pcm5122_pin_to_code(config):
     return var
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
diff --git a/esphome/components/pcm5122/switch/__init__.py b/esphome/components/pcm5122/switch/__init__.py
index 10519da895..829adeccb7 100644
--- a/esphome/components/pcm5122/switch/__init__.py
+++ b/esphome/components/pcm5122/switch/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import switch
 import esphome.config_validation as cv
 from esphome.const import CONF_POWER_MODE, ENTITY_CATEGORY_CONFIG
+from esphome.types import ConfigType
 
 from ..audio_dac import CONF_PCM5122, PCM5122, pcm5122_ns
 
@@ -26,7 +27,7 @@ CONFIG_SCHEMA = switch.switch_schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await switch.new_switch(config)
     await cg.register_parented(var, config[CONF_PCM5122])
     cg.add(var.set_power_mode(config[CONF_POWER_MODE]))
diff --git a/esphome/components/pmsx003/sensor.py b/esphome/components/pmsx003/sensor.py
index 0a11120bf0..fe784c5ffe 100644
--- a/esphome/components/pmsx003/sensor.py
+++ b/esphome/components/pmsx003/sensor.py
@@ -1,3 +1,5 @@
+from typing import Any
+
 import esphome.codegen as cg
 from esphome.components import sensor, uart
 import esphome.config_validation as cv
@@ -32,6 +34,8 @@ from esphome.const import (
     UNIT_MICROGRAMS_PER_CUBIC_METER,
     UNIT_PERCENT,
 )
+from esphome.core import TimePeriodMilliseconds
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@ximex"]
 DEPENDENCIES = ["uart"]
@@ -167,14 +171,14 @@ SENSORS_TO_TYPE = {
 }
 
 
-def validate_pmsx003_sensors(value):
+def validate_pmsx003_sensors(value: ConfigType) -> ConfigType:
     for key, types in SENSORS_TO_TYPE.items():
         if key in value and value[CONF_TYPE] not in types:
             raise cv.Invalid(f"{value[CONF_TYPE]} does not have {key} sensor!")
     return value
 
 
-def validate_update_interval(value):
+def validate_update_interval(value: Any) -> TimePeriodMilliseconds:
     value = cv.positive_time_period_milliseconds(value)
     if value == cv.time_period("0s"):
         return value
@@ -295,7 +299,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-def final_validate(config):
+def final_validate(config: ConfigType) -> None:
     require_tx = config[CONF_UPDATE_INTERVAL] > cv.time_period("0s")
     schema = uart.final_validate_device_schema(
         "pmsx003", baud_rate=9600, require_rx=True, require_tx=require_tx
@@ -306,7 +310,7 @@ def final_validate(config):
 FINAL_VALIDATE_SCHEMA = final_validate
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await uart.register_uart_device(var, config)
diff --git a/esphome/components/pmwcs3/sensor.py b/esphome/components/pmwcs3/sensor.py
index c0bc54c5ba..ae22b3e0d6 100644
--- a/esphome/components/pmwcs3/sensor.py
+++ b/esphome/components/pmwcs3/sensor.py
@@ -10,6 +10,9 @@ from esphome.const import (
     ICON_THERMOMETER,
     STATE_CLASS_MEASUREMENT,
 )
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@SeByDocKy"]
 DEPENDENCIES = ["i2c"]
@@ -72,7 +75,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
@@ -114,7 +117,12 @@ PMWCS3_CALIBRATION_SCHEMA = cv.Schema(
     PMWCS3_CALIBRATION_SCHEMA,
     synchronous=True,
 )
-async def pmwcs3_calibration_to_code(config, action_id, template_arg, args):
+async def pmwcs3_calibration_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     parent = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, parent)
 
@@ -134,7 +142,12 @@ PMWCS3_NEW_I2C_ADDRESS_SCHEMA = cv.maybe_simple_value(
     PMWCS3_NEW_I2C_ADDRESS_SCHEMA,
     synchronous=True,
 )
-async def pmwcs3newi2caddress_to_code(config, action_id, template_arg, args):
+async def pmwcs3newi2caddress_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     parent = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, parent)
     address = await cg.templatable(config[CONF_ADDRESS], args, cg.int_)
diff --git a/esphome/components/pulse_counter/sensor.py b/esphome/components/pulse_counter/sensor.py
index 3326745846..7c5a0590d7 100644
--- a/esphome/components/pulse_counter/sensor.py
+++ b/esphome/components/pulse_counter/sensor.py
@@ -1,3 +1,5 @@
+from typing import Any
+
 from esphome import automation, pins
 import esphome.codegen as cg
 from esphome.components import sensor
@@ -19,7 +21,9 @@ from esphome.const import (
     UNIT_PULSES,
     UNIT_PULSES_PER_MINUTE,
 )
-from esphome.core import CORE
+from esphome.core import CORE, ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 CONF_USE_PCNT = "use_pcnt"
 
@@ -42,7 +46,7 @@ SetTotalPulsesAction = pulse_counter_ns.class_(
 )
 
 
-def validate_internal_filter(value):
+def validate_internal_filter(value: ConfigType) -> ConfigType:
     use_pcnt = value.get(CONF_USE_PCNT)
     if CORE.is_esp8266 and use_pcnt:
         raise cv.Invalid(
@@ -63,7 +67,7 @@ def validate_internal_filter(value):
     return value
 
 
-def validate_pulse_counter_pin(value):
+def validate_pulse_counter_pin(value: Any) -> ConfigType:
     value = pins.internal_gpio_input_pin_schema(value)
     if CORE.is_esp8266 and value[CONF_NUMBER] >= 16:
         raise cv.Invalid(
@@ -72,7 +76,7 @@ def validate_pulse_counter_pin(value):
     return value
 
 
-def validate_count_mode(value):
+def validate_count_mode(value: ConfigType) -> ConfigType:
     rising_edge = value[CONF_RISING_EDGE]
     falling_edge = value[CONF_FALLING_EDGE]
     if rising_edge == "DISABLE" and falling_edge == "DISABLE":
@@ -126,7 +130,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     use_pcnt = config.get(CONF_USE_PCNT)
     if CORE.is_esp32 and use_pcnt:
         include_builtin_idf_component("esp_driver_pcnt")
@@ -157,7 +161,12 @@ async def to_code(config):
     ),
     synchronous=True,
 )
-async def set_total_action_to_code(config, action_id, template_arg, args):
+async def set_total_action_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, paren)
     template_ = await cg.templatable(config[CONF_VALUE], args, cg.uint32)
diff --git a/esphome/components/pulse_meter/sensor.py b/esphome/components/pulse_meter/sensor.py
index ab3dd2a249..9bda891efc 100644
--- a/esphome/components/pulse_meter/sensor.py
+++ b/esphome/components/pulse_meter/sensor.py
@@ -1,3 +1,5 @@
+from typing import Any
+
 from esphome import automation, pins
 import esphome.codegen as cg
 from esphome.components import sensor
@@ -17,7 +19,9 @@ from esphome.const import (
     UNIT_PULSES,
     UNIT_PULSES_PER_MINUTE,
 )
-from esphome.core import CORE
+from esphome.core import CORE, ID, TimePeriodMicroseconds
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@stevebaxter", "@cstaahl", "@TrentHouliston"]
 
@@ -37,18 +41,18 @@ FILTER_MODES = {
 SetTotalPulsesAction = pulse_meter_ns.class_("SetTotalPulsesAction", automation.Action)
 
 
-def validate_internal_filter(value):
+def validate_internal_filter(value: Any) -> TimePeriodMicroseconds:
     return cv.positive_time_period_microseconds(value)
 
 
-def validate_timeout(value):
+def validate_timeout(value: Any) -> TimePeriodMicroseconds:
     value = cv.positive_time_period_microseconds(value)
     if value.total_minutes > 70:
         raise cv.Invalid("Maximum timeout is 70 minutes")
     return value
 
 
-def validate_pulse_meter_pin(value):
+def validate_pulse_meter_pin(value: Any) -> ConfigType:
     value = pins.internal_gpio_input_pin_schema(value)
     if CORE.is_esp8266 and value[CONF_NUMBER] >= 16:
         raise cv.Invalid(
@@ -81,7 +85,7 @@ CONFIG_SCHEMA = sensor.sensor_schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await sensor.new_sensor(config)
     await cg.register_component(var, config)
 
@@ -107,7 +111,12 @@ async def to_code(config):
     ),
     synchronous=True,
 )
-async def set_total_action_to_code(config, action_id, template_arg, args):
+async def set_total_action_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, paren)
     template_ = await cg.templatable(config[CONF_VALUE], args, cg.uint32)
diff --git a/esphome/components/pylontech/__init__.py b/esphome/components/pylontech/__init__.py
index 82b98654a2..4ab606d9f9 100644
--- a/esphome/components/pylontech/__init__.py
+++ b/esphome/components/pylontech/__init__.py
@@ -4,6 +4,7 @@ import esphome.codegen as cg
 from esphome.components import uart
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.types import ConfigType
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -41,7 +42,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await uart.register_uart_device(var, config)
diff --git a/esphome/components/pylontech/sensor/__init__.py b/esphome/components/pylontech/sensor/__init__.py
index 450f663274..40391206fb 100644
--- a/esphome/components/pylontech/sensor/__init__.py
+++ b/esphome/components/pylontech/sensor/__init__.py
@@ -16,6 +16,7 @@ from esphome.const import (
     UNIT_PERCENT,
     UNIT_VOLT,
 )
+from esphome.types import ConfigType
 
 from .. import CONF_BATTERY, CONF_PYLONTECH_ID, PYLONTECH_COMPONENT_SCHEMA, pylontech_ns
 
@@ -90,7 +91,7 @@ CONFIG_SCHEMA = PYLONTECH_COMPONENT_SCHEMA.extend(
 ).extend({cv.Optional(marker): schema for marker, schema in TYPES.items()})
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     paren = await cg.get_variable(config[CONF_PYLONTECH_ID])
     bat = cg.new_Pvariable(config[CONF_ID], config[CONF_BATTERY])
 
diff --git a/esphome/components/pylontech/text_sensor/__init__.py b/esphome/components/pylontech/text_sensor/__init__.py
index f68ca10374..511eb7d542 100644
--- a/esphome/components/pylontech/text_sensor/__init__.py
+++ b/esphome/components/pylontech/text_sensor/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import text_sensor
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.types import ConfigType
 
 from .. import CONF_BATTERY, CONF_PYLONTECH_ID, PYLONTECH_COMPONENT_SCHEMA, pylontech_ns
 
@@ -24,7 +25,7 @@ CONFIG_SCHEMA = PYLONTECH_COMPONENT_SCHEMA.extend(
 ).extend({cv.Optional(marker): text_sensor.text_sensor_schema() for marker in MARKERS})
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     paren = await cg.get_variable(config[CONF_PYLONTECH_ID])
     bat = cg.new_Pvariable(config[CONF_ID], config[CONF_BATTERY])
 
diff --git a/esphome/components/pzemac/sensor.py b/esphome/components/pzemac/sensor.py
index 5bb734cb2d..f093262e18 100644
--- a/esphome/components/pzemac/sensor.py
+++ b/esphome/components/pzemac/sensor.py
@@ -26,6 +26,8 @@ from esphome.const import (
     UNIT_WATT,
     UNIT_WATT_HOURS,
 )
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
 from esphome.types import ConfigType
 
 AUTO_LOAD = ["modbus"]
@@ -93,7 +95,12 @@ CONFIG_SCHEMA = (
     ),
     synchronous=True,
 )
-async def reset_energy_to_code(config, action_id, template_arg, args):
+async def reset_energy_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
 
@@ -105,7 +112,7 @@ def _final_validate(config: ConfigType) -> None:
 FINAL_VALIDATE_SCHEMA = _final_validate
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await modbus.register_modbus_client_device(var, config)
diff --git a/esphome/components/pzemdc/sensor.py b/esphome/components/pzemdc/sensor.py
index b2c7c3a29d..b9f7246b72 100644
--- a/esphome/components/pzemdc/sensor.py
+++ b/esphome/components/pzemdc/sensor.py
@@ -20,6 +20,8 @@ from esphome.const import (
     UNIT_VOLT,
     UNIT_WATT,
 )
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
 from esphome.types import ConfigType
 
 AUTO_LOAD = ["modbus"]
@@ -75,7 +77,12 @@ CONFIG_SCHEMA = (
     ),
     synchronous=True,
 )
-async def reset_energy_to_code(config, action_id, template_arg, args):
+async def reset_energy_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
 
@@ -87,7 +94,7 @@ def _final_validate(config: ConfigType) -> None:
 FINAL_VALIDATE_SCHEMA = _final_validate
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await modbus.register_modbus_client_device(var, config)
diff --git a/esphome/components/qmc5883l/sensor.py b/esphome/components/qmc5883l/sensor.py
index fe34381ad8..e0186be163 100644
--- a/esphome/components/qmc5883l/sensor.py
+++ b/esphome/components/qmc5883l/sensor.py
@@ -1,4 +1,6 @@
+from collections.abc import Callable
 import logging
+from typing import Any
 
 from esphome import pins
 import esphome.codegen as cg
@@ -24,6 +26,7 @@ from esphome.const import (
     UNIT_DEGREES,
     UNIT_MICROTESLA,
 )
+from esphome.types import ConfigType
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -60,7 +63,7 @@ QMC5883LOversamplings = {
 }
 
 
-def validate_config(config):
+def validate_config(config: ConfigType) -> ConfigType:
     if (
         config[CONF_UPDATE_INTERVAL].total_milliseconds < 15
         and CONF_DRDY_PIN not in config
@@ -72,14 +75,16 @@ def validate_config(config):
     return config
 
 
-def validate_enum(enum_values, units=None, int=True):
+def validate_enum(
+    enum_values: dict[Any, Any], units: str | list[str] | None = None, int: bool = True
+) -> Callable[[Any], Any]:
     _units = []
     if units is not None:
         _units = units if isinstance(units, list) else [units]
         _units = [str(x) for x in _units]
     enum_bound = cv.enum(enum_values, int=int)
 
-    def validate_enum_bound(value):
+    def validate_enum_bound(value: Any) -> Any:
         value = cv.string(value)
         for unit in _units:
             if value.endswith(unit):
@@ -137,7 +142,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
diff --git a/esphome/components/rd03d/__init__.py b/esphome/components/rd03d/__init__.py
index 52e9a2c09a..4fff41e4f6 100644
--- a/esphome/components/rd03d/__init__.py
+++ b/esphome/components/rd03d/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import uart
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_THROTTLE
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@jasstrong"]
 DEPENDENCIES = ["uart"]
@@ -38,7 +39,7 @@ FINAL_VALIDATE_SCHEMA = uart.final_validate_device_schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await uart.register_uart_device(var, config)
diff --git a/esphome/components/rd03d/binary_sensor.py b/esphome/components/rd03d/binary_sensor.py
index afb7527aa1..2c040d0560 100644
--- a/esphome/components/rd03d/binary_sensor.py
+++ b/esphome/components/rd03d/binary_sensor.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import binary_sensor
 import esphome.config_validation as cv
 from esphome.const import CONF_TARGET, DEVICE_CLASS_OCCUPANCY
+from esphome.types import ConfigType
 
 from . import CONF_RD03D_ID, RD03DComponent
 
@@ -26,7 +27,7 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_RD03D_ID])
 
     if target_config := config.get(CONF_TARGET):
diff --git a/esphome/components/rd03d/sensor.py b/esphome/components/rd03d/sensor.py
index 953d99c2da..d29656bab0 100644
--- a/esphome/components/rd03d/sensor.py
+++ b/esphome/components/rd03d/sensor.py
@@ -15,6 +15,7 @@ from esphome.const import (
     UNIT_DEGREES,
     UNIT_MILLIMETER,
 )
+from esphome.types import ConfigType
 
 from . import CONF_RD03D_ID, RD03DComponent
 
@@ -75,7 +76,7 @@ CONFIG_SCHEMA = cv.Schema(
 ).extend({cv.Optional(f"target_{i + 1}"): TARGET_SCHEMA for i in range(MAX_TARGETS)})
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_RD03D_ID])
 
     if target_count_config := config.get(CONF_TARGET_COUNT):
diff --git a/esphome/components/remote_receiver/__init__.py b/esphome/components/remote_receiver/__init__.py
index ad9c4b5a18..6e8c73d331 100644
--- a/esphome/components/remote_receiver/__init__.py
+++ b/esphome/components/remote_receiver/__init__.py
@@ -1,3 +1,5 @@
+from typing import Any
+
 from esphome import pins
 import esphome.codegen as cg
 from esphome.components import esp32, esp32_rmt, remote_base
@@ -21,6 +23,7 @@ from esphome.const import (
     PlatformFramework,
 )
 from esphome.core import CORE, TimePeriod
+from esphome.types import ConfigType
 
 CONF_FILTER_SYMBOLS = "filter_symbols"
 CONF_RECEIVE_SYMBOLS = "receive_symbols"
@@ -62,7 +65,7 @@ RemoteReceiverComponent = remote_receiver_ns.class_(
 )
 
 
-def validate_config(config):
+def validate_config(config: ConfigType) -> ConfigType:
     if CORE.is_esp32:
         variant = esp32.get_esp32_variant()
         if variant in esp32_rmt.VARIANTS_NO_RMT:
@@ -78,7 +81,7 @@ def validate_config(config):
     return config
 
 
-def validate_tolerance(value):
+def validate_tolerance(value: Any) -> ConfigType:
     if isinstance(value, dict):
         return TOLERANCE_SCHEMA(value)
 
@@ -196,7 +199,7 @@ CONFIG_SCHEMA = remote_base.validate_triggers(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     pin = await cg.gpio_pin_expression(config[CONF_PIN])
     if CORE.is_esp32 and esp32.get_esp32_variant() not in esp32_rmt.VARIANTS_NO_RMT:
         # Re-enable ESP-IDF's RMT driver (excluded by default to save compile time)
diff --git a/esphome/components/remote_receiver/binary_sensor.py b/esphome/components/remote_receiver/binary_sensor.py
index fe3e2af950..d4009f396b 100644
--- a/esphome/components/remote_receiver/binary_sensor.py
+++ b/esphome/components/remote_receiver/binary_sensor.py
@@ -1,4 +1,5 @@
 from esphome.components import binary_sensor, remote_base
+from esphome.types import ConfigType
 
 from . import FILTER_SOURCE_FILES  # noqa: F401  pylint: disable=unused-import
 
@@ -7,6 +8,6 @@ DEPENDENCIES = ["remote_receiver"]
 CONFIG_SCHEMA = remote_base.validate_binary_sensor
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await remote_base.build_binary_sensor(config)
     await binary_sensor.register_binary_sensor(var, config)
diff --git a/esphome/components/remote_transmitter/__init__.py b/esphome/components/remote_transmitter/__init__.py
index 521c3daf87..9d8761ea90 100644
--- a/esphome/components/remote_transmitter/__init__.py
+++ b/esphome/components/remote_transmitter/__init__.py
@@ -18,7 +18,9 @@ from esphome.const import (
     CONF_VALUE,
     PlatformFramework,
 )
-from esphome.core import CORE
+from esphome.core import CORE, ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -94,7 +96,7 @@ CONFIG_SCHEMA = (
 )
 
 
-def _validate_non_blocking(config):
+def _validate_non_blocking(config: ConfigType) -> None:
     if (
         CORE.is_esp32
         and esp32.get_esp32_variant() not in esp32_rmt.VARIANTS_NO_RMT
@@ -125,7 +127,12 @@ DIGITAL_WRITE_ACTION_SCHEMA = cv.maybe_simple_value(
     DIGITAL_WRITE_ACTION_SCHEMA,
     synchronous=True,
 )
-async def digital_write_action_to_code(config, action_id, template_arg, args):
+async def digital_write_action_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_TRANSMITTER_ID])
     template_ = await cg.templatable(config[CONF_VALUE], args, cg.bool_)
@@ -133,7 +140,7 @@ async def digital_write_action_to_code(config, action_id, template_arg, args):
     return var
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     pin = await cg.gpio_pin_expression(config[CONF_PIN])
     if CORE.is_esp32 and esp32.get_esp32_variant() not in esp32_rmt.VARIANTS_NO_RMT:
         # Re-enable ESP-IDF's RMT driver (excluded by default to save compile time)
@@ -178,12 +185,14 @@ FILTER_SOURCE_FILES = filter_source_files_from_platform(
             PlatformFramework.ESP32_ARDUINO,
             PlatformFramework.ESP32_IDF,
         },
+        "remote_transmitter_rtl87xx.cpp": {
+            PlatformFramework.RTL87XX_ARDUINO,
+        },
         "remote_transmitter.cpp": {
             PlatformFramework.ESP32_ARDUINO,
             PlatformFramework.ESP32_IDF,
             PlatformFramework.ESP8266_ARDUINO,
             PlatformFramework.BK72XX_ARDUINO,
-            PlatformFramework.RTL87XX_ARDUINO,
             PlatformFramework.LN882X_ARDUINO,
             PlatformFramework.RP2_ARDUINO,
         },
diff --git a/esphome/components/remote_transmitter/remote_transmitter.cpp b/esphome/components/remote_transmitter/remote_transmitter.cpp
index 49c711330b..67341e936f 100644
--- a/esphome/components/remote_transmitter/remote_transmitter.cpp
+++ b/esphome/components/remote_transmitter/remote_transmitter.cpp
@@ -2,7 +2,8 @@
 #include "esphome/core/log.h"
 #include "esphome/core/application.h"
 
-#if defined(USE_LIBRETINY) || defined(USE_ESP8266) || defined(USE_RP2) || (defined(USE_ESP32) && !SOC_RMT_SUPPORTED)
+#if (defined(USE_LIBRETINY) && !defined(USE_RTL87XX)) || defined(USE_ESP8266) || defined(USE_RP2) || \
+    (defined(USE_ESP32) && !SOC_RMT_SUPPORTED)
 
 namespace esphome::remote_transmitter {
 
@@ -81,25 +82,37 @@ void RemoteTransmitterComponent::send_internal(uint32_t send_times, uint32_t sen
   ESP_LOGD(TAG, "Sending remote code");
   uint32_t on_time, off_time;
   this->calculate_on_off_time_(this->temp_.get_carrier_frequency(), &on_time, &off_time);
-  this->target_time_ = 0;
   this->transmit_trigger_.trigger();
   for (uint32_t i = 0; i < send_times; i++) {
-    InterruptLock lock;
-    for (int32_t item : this->temp_.get_data()) {
-      if (item > 0) {
-        const auto length = uint32_t(item);
-        this->mark_(on_time, off_time, length);
-      } else {
-        const auto length = uint32_t(-item);
-        this->space_(length);
+    {
+      InterruptLock lock;
+      // Re-anchor every iteration: timing must never span a lock boundary, as micros() can
+      // jump when interrupts are re-enabled between repeats (e.g. LibreTiny's Beken micros()
+      // discards its interrupt-lock correction, stretching the repeat gap by the lock duration)
+      this->target_time_ = 0;
+      for (int32_t item : this->temp_.get_data()) {
+        if (item > 0) {
+          const auto length = uint32_t(item);
+          this->mark_(on_time, off_time, length);
+        } else {
+          const auto length = uint32_t(-item);
+          this->space_(length);
+        }
+        App.feed_wdt();
       }
-      App.feed_wdt();
+      this->await_target_time_();  // wait for duration of last pulse
+      this->pin_->digital_write(false);
     }
-    this->await_target_time_();  // wait for duration of last pulse
-    this->pin_->digital_write(false);
 
-    if (i + 1 < send_times)
-      this->target_time_ += send_wait;
+    if (i + 1 < send_times) {
+      // Wait out the repeat gap with interrupts enabled: wait_time is unbounded user config
+      // (previously this spin ran inside the next iteration's lock, disabling interrupts for
+      // the whole gap). Anchoring after the lock release keeps it exact on all platforms.
+      const uint32_t gap_end = micros() + send_wait;
+      while ((int32_t) (gap_end - micros()) > 0) {
+        App.feed_wdt();
+      }
+    }
   }
   this->complete_trigger_.trigger();
 }
diff --git a/esphome/components/remote_transmitter/remote_transmitter.h b/esphome/components/remote_transmitter/remote_transmitter.h
index e2d33d13cc..94bcb74b09 100644
--- a/esphome/components/remote_transmitter/remote_transmitter.h
+++ b/esphome/components/remote_transmitter/remote_transmitter.h
@@ -65,14 +65,21 @@ class RemoteTransmitterComponent final : public remote_base::RemoteTransmitterBa
  protected:
   void send_internal(uint32_t send_times, uint32_t send_wait) override;
 #if defined(USE_ESP8266) || defined(USE_LIBRETINY) || defined(USE_RP2) || (defined(USE_ESP32) && !SOC_RMT_SUPPORTED)
+  void await_target_time_();
+  uint32_t target_time_{0};
+#endif
+#if defined(USE_ESP8266) || (defined(USE_LIBRETINY) && !defined(USE_RTL87XX)) || defined(USE_RP2) || \
+    (defined(USE_ESP32) && !SOC_RMT_SUPPORTED)
   void calculate_on_off_time_(uint32_t carrier_frequency, uint32_t *on_time_period, uint32_t *off_time_period);
 
   void mark_(uint32_t on_time, uint32_t off_time, uint32_t usec);
 
   void space_(uint32_t usec);
-
-  void await_target_time_();
-  uint32_t target_time_;
+#endif
+#ifdef USE_RTL87XX
+  // Carrier frequency the PWM is currently configured for; 0 = not yet configured
+  uint32_t current_carrier_frequency_{0};
+  void *pwm_{nullptr};  // pwmout_t*, opaque here to keep the SDK header out of this shared header
 #endif
 
 #if defined(USE_ESP32) && SOC_RMT_SUPPORTED
diff --git a/esphome/components/remote_transmitter/remote_transmitter_rtl87xx.cpp b/esphome/components/remote_transmitter/remote_transmitter_rtl87xx.cpp
new file mode 100644
index 0000000000..b7078b9d69
--- /dev/null
+++ b/esphome/components/remote_transmitter/remote_transmitter_rtl87xx.cpp
@@ -0,0 +1,137 @@
+#include "remote_transmitter.h"
+#include "esphome/core/application.h"
+#include "esphome/core/log.h"
+
+// clang-tidy cannot parse the Realtek SDK headers pulled in via ArduinoPrivate.h
+#if defined(USE_RTL87XX) && !defined(CLANG_TIDY)
+
+// ArduinoPrivate.h = Arduino.h + the SDK's mbed HAL (pwmout etc.) with the core's fixes for
+// type-name collisions between the two (e.g. PinMode)
+#include <ArduinoPrivate.h>
+#include <FreeRTOS.h>
+#include <task.h>
+
+namespace esphome::remote_transmitter {
+
+static const char *const TAG = "remote_transmitter";
+
+// The carrier is generated by the PWM peripheral instead of bit-banging the pin: software carrier
+// generation requires disabling interrupts for the whole frame, but this core's micros() is derived
+// from the FreeRTOS tick and freezes while interrupts are off, so the timing loop never advances and
+// the watchdog resets the chip. With hardware PWM, software only times the mark/space envelope and
+// interrupts can stay enabled.
+//
+// The PWM is driven through the SDK's pwmout HAL directly rather than the Arduino wiring layer:
+// changing the carrier frequency via the wiring requires a GPIO/PWM pin mode round-trip, which
+// use-after-frees the core's per-pin state (pinRemoveMode() frees without nulling) and corrupts the
+// heap. pwmout_period_us() changes the frequency with no mode transitions.
+
+void RemoteTransmitterComponent::setup() {
+  // Deliberately no pin_->setup(): registering the pin as GPIO claims it in the SDK's pin
+  // management, and the pad is then never handed over to the PWM peripheral -- pwmout_init()
+  // must own the pin from the start.
+  PinInfo *info = pinInfo(this->pin_->get_pin());
+  if (info == nullptr || !pinSupported(info, PIN_PWM)) {
+    // checked here because the AmebaZ (RTL8710B) SDK does not report PWM init failure
+    ESP_LOGE(TAG, "Pin %u is not PWM-capable", this->pin_->get_pin());
+    this->mark_failed();
+    return;
+  }
+  auto *pwm = new pwmout_t();
+  this->pwm_ = pwm;
+  pwmout_init(pwm, static_cast<PinName>(info->gpio));
+#if LT_RTL8720C
+  // only the AmebaZ2 SDK's pwmout_s reports init success
+  if (!pwm->is_init) {
+    ESP_LOGE(TAG, "PWM init failed on pin %u", this->pin_->get_pin());
+    delete pwm;
+    this->pwm_ = nullptr;
+    this->mark_failed();
+    return;
+  }
+#endif
+  pwmout_period_us(pwm, 26);  // placeholder; the real carrier period is set per transmission
+  pwmout_write(pwm, this->pin_->is_inverted() ? 1.0f : 0.0f);
+}
+
+void RemoteTransmitterComponent::dump_config() {
+  ESP_LOGCONFIG(TAG,
+                "Remote Transmitter:\n"
+                "  Carrier Duty: %u%%",
+                this->carrier_duty_percent_);
+  LOG_PIN("  Pin: ", this->pin_);
+}
+
+void RemoteTransmitterComponent::await_target_time_() {
+  const uint32_t current_time = micros();
+  if (this->target_time_ == 0) {
+    this->target_time_ = current_time;
+  } else {
+    while ((int32_t) (this->target_time_ - micros()) > 0) {
+    }
+  }
+}
+
+void RemoteTransmitterComponent::digital_write(bool value) {
+  if (this->pwm_ == nullptr)
+    return;
+  pwmout_write(static_cast<pwmout_t *>(this->pwm_), (value != this->pin_->is_inverted()) ? 1.0f : 0.0f);
+}
+
+void RemoteTransmitterComponent::send_internal(uint32_t send_times, uint32_t send_wait) {
+  auto *pwm = static_cast<pwmout_t *>(this->pwm_);
+  if (pwm == nullptr) {
+    ESP_LOGW(TAG, "Cannot send: PWM not initialized");
+    return;
+  }
+  ESP_LOGD(TAG, "Sending remote code");
+  const uint32_t carrier_frequency = this->temp_.get_carrier_frequency();
+  // unmodulated protocols (no carrier or 100% duty) drive the pin constantly during marks
+  float mark_duty =
+      (carrier_frequency > 0 && this->carrier_duty_percent_ < 100) ? this->carrier_duty_percent_ / 100.0f : 1.0f;
+  float space_duty = 0.0f;
+  if (this->pin_->is_inverted()) {
+    mark_duty = 1.0f - mark_duty;
+    space_duty = 1.0f;
+  }
+  if (carrier_frequency > 0 && carrier_frequency != this->current_carrier_frequency_) {
+    // round(1000000/freq), clamped like the bit-bang path so a bad lambda can't hand the SDK a zero period
+    const uint32_t period = std::max(uint32_t(1), (1000000UL + carrier_frequency / 2) / carrier_frequency);
+    pwmout_period_us(pwm, period);
+    this->current_carrier_frequency_ = carrier_frequency;
+  }
+  this->transmit_trigger_.trigger();
+  const UBaseType_t saved_priority = uxTaskPriorityGet(nullptr);
+  for (uint32_t i = 0; i < send_times; i++) {
+    // Boost task priority for the frame only, so WiFi/lwIP tasks can't preempt mid-frame and
+    // merge adjacent marks. Interrupts stay enabled: micros() needs the FreeRTOS tick, and
+    // ISR latency is within receiver tolerance.
+    vTaskPrioritySet(nullptr, configMAX_PRIORITIES - 1);
+    // Re-anchor every iteration: a late exit from the normal-priority gap wait must not
+    // leave the schedule behind micros(), which would compress the next frame's leading items
+    this->target_time_ = 0;
+    for (int32_t item : this->temp_.get_data()) {
+      const bool is_mark = item > 0;
+      this->await_target_time_();
+      pwmout_write(pwm, is_mark ? mark_duty : space_duty);
+      this->target_time_ += is_mark ? uint32_t(item) : uint32_t(-item);
+      App.feed_wdt();
+    }
+    this->await_target_time_();  // wait for duration of last pulse
+    pwmout_write(pwm, space_duty);
+    vTaskPrioritySet(nullptr, saved_priority);
+    if (i + 1 < send_times) {
+      // The repeat gap is user-configurable and unbounded, so wait it out at normal
+      // priority, feeding the watchdog
+      const uint32_t gap_end = micros() + send_wait;
+      while ((int32_t) (gap_end - micros()) > 0) {
+        App.feed_wdt();
+      }
+    }
+  }
+  this->complete_trigger_.trigger();
+}
+
+}  // namespace esphome::remote_transmitter
+
+#endif  // USE_RTL87XX && !CLANG_TIDY
diff --git a/esphome/components/rotary_encoder/sensor.py b/esphome/components/rotary_encoder/sensor.py
index 0e5a03523d..72722ec4b1 100644
--- a/esphome/components/rotary_encoder/sensor.py
+++ b/esphome/components/rotary_encoder/sensor.py
@@ -15,6 +15,9 @@ from esphome.const import (
     STATE_CLASS_MEASUREMENT,
     UNIT_STEPS,
 )
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 rotary_encoder_ns = cg.esphome_ns.namespace("rotary_encoder")
 
@@ -44,7 +47,7 @@ RotaryEncoderSetValueAction = rotary_encoder_ns.class_(
 )
 
 
-def validate_min_max_value(config):
+def validate_min_max_value(config: ConfigType) -> ConfigType:
     if CONF_MIN_VALUE in config and CONF_MAX_VALUE in config:
         min_val = config[CONF_MIN_VALUE]
         max_val = config[CONF_MAX_VALUE]
@@ -92,7 +95,7 @@ _CALLBACK_AUTOMATIONS = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await sensor.new_sensor(config)
     await cg.register_component(var, config)
 
@@ -126,7 +129,12 @@ async def to_code(config):
     ),
     synchronous=True,
 )
-async def sensor_template_publish_to_code(config, action_id, template_arg, args):
+async def sensor_template_publish_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, paren)
     template_ = await cg.templatable(config[CONF_VALUE], args, cg.int_)
diff --git a/esphome/components/rp2040_pio_led_strip/light.py b/esphome/components/rp2040_pio_led_strip/light.py
index 9f7479edd0..5b7259f9e5 100644
--- a/esphome/components/rp2040_pio_led_strip/light.py
+++ b/esphome/components/rp2040_pio_led_strip/light.py
@@ -18,7 +18,7 @@ from esphome.types import ConfigType
 from esphome.util import _LOGGER
 
 
-def get_nops(timing):
+def get_nops(timing: float) -> list[float | str]:
     """
     Calculate the number of NOP instructions required to wait for a given amount of time.
     """
@@ -39,7 +39,7 @@ def get_nops(timing):
     return nops
 
 
-def generate_assembly_code(id, t0h, t0l, t1h, t1l):
+def generate_assembly_code(id: str, t0h: int, t0l: int, t1h: int, t1l: int) -> str:
     """
     Generate assembly code with the given timing values.
     """
@@ -125,7 +125,7 @@ writezero:
     return assembly_template + const_csdk_code
 
 
-def time_to_cycles(time_us):
+def time_to_cycles(time_us: float) -> int:
     cycles_per_us = 57.5
     return round(float(time_us) * cycles_per_us)
 
@@ -172,7 +172,7 @@ CONF_BIT1_HIGH = "bit1_high"
 CONF_BIT1_LOW = "bit1_low"
 
 
-def _validate_timing(value):
+def _validate_timing(value: str) -> float:
     # if doesn't end with us, raise error
     if not value.endswith("us"):
         raise cv.Invalid("Timing must be in microseconds (us)")
diff --git a/esphome/components/runtime_image/__init__.py b/esphome/components/runtime_image/__init__.py
index 9fa32a5a65..3c130a7d75 100644
--- a/esphome/components/runtime_image/__init__.py
+++ b/esphome/components/runtime_image/__init__.py
@@ -77,6 +77,11 @@ class JPEGFormat(Format):
     def actions(self) -> None:
         cg.add_define("USE_RUNTIME_IMAGE_JPEG")
         cg.add_library("JPEGDEC", "1.8.4", "https://github.com/bitbank2/JPEGDEC#1.8.4")
+        if CORE.is_host:
+            # JPEGDEC's host detection checks __MACH__/__LINUX__, but gcc only
+            # predefines the lowercase __linux__; without this a Linux host
+            # build tries to include Arduino.h.
+            cg.add_build_flag("-D__LINUX__")
         if CORE.is_esp32:
             from esphome.components.esp32 import add_idf_component
 
diff --git a/esphome/components/runtime_image/bmp_decoder.cpp b/esphome/components/runtime_image/bmp_decoder.cpp
index 6a1bd61d86..5d45621fb7 100644
--- a/esphome/components/runtime_image/bmp_decoder.cpp
+++ b/esphome/components/runtime_image/bmp_decoder.cpp
@@ -12,6 +12,22 @@ namespace esphome::runtime_image {
 
 static const char *const TAG = "image_decoder.bmp";
 
+void BmpDecoder::reset() {
+  ImageDecoder::reset();
+  this->bits_per_pixel_ = 0;
+  this->compression_method_ = 0;
+  this->image_data_size_ = 0;
+  this->width_ = 0;
+  this->height_ = 0;
+  this->current_index_ = 0;
+  this->paint_index_ = 0;
+  // color_table_ is deliberately kept allocated so the next decode can reuse it
+  this->color_table_entries_ = 0;
+  this->data_offset_ = 0;
+  this->padding_bytes_ = 0;
+  this->width_bytes_ = 0;
+}
+
 int HOT BmpDecoder::decode(uint8_t *buffer, size_t size) {
   size_t index = 0;
   if (this->current_index_ == 0) {
@@ -85,7 +101,10 @@ int HOT BmpDecoder::decode(uint8_t *buffer, size_t size) {
         size_t header_size = encode_uint32(buffer[17], buffer[16], buffer[15], buffer[14]);
         size_t offset = 14 + header_size;
 
-        this->color_table_ = std::make_unique<uint32_t[]>(this->color_table_entries_);
+        if (this->color_table_entries_ > this->color_table_capacity_) {
+          this->color_table_ = std::make_unique<uint32_t[]>(this->color_table_entries_);
+          this->color_table_capacity_ = this->color_table_entries_;
+        }
 
         for (size_t i = 0; i < this->color_table_entries_; i++) {
           this->color_table_[i] = encode_uint32(buffer[offset + i * 4 + 3], buffer[offset + i * 4 + 2],
diff --git a/esphome/components/runtime_image/bmp_decoder.h b/esphome/components/runtime_image/bmp_decoder.h
index a52a561584..01acc41f91 100644
--- a/esphome/components/runtime_image/bmp_decoder.h
+++ b/esphome/components/runtime_image/bmp_decoder.h
@@ -21,8 +21,9 @@ class BmpDecoder : public ImageDecoder {
    *
    * @param image The RuntimeImage to decode the stream into.
    */
-  BmpDecoder(RuntimeImage *image) : ImageDecoder(image) {}
+  BmpDecoder(RuntimeImage *image) : ImageDecoder(image, BMP) {}
 
+  void reset() override;
   int HOT decode(uint8_t *buffer, size_t size) override;
 
   bool is_finished() const override {
@@ -35,17 +36,18 @@ class BmpDecoder : public ImageDecoder {
   }
 
  protected:
+  std::unique_ptr<uint32_t[]> color_table_;
   size_t current_index_{0};
   size_t paint_index_{0};
   ssize_t width_{0};
   ssize_t height_{0};
-  uint16_t bits_per_pixel_{0};
+  size_t width_bytes_{0};
+  size_t data_offset_{0};
   uint32_t compression_method_{0};
   uint32_t image_data_size_{0};
   uint32_t color_table_entries_{0};
-  std::unique_ptr<uint32_t[]> color_table_;
-  size_t width_bytes_{0};
-  size_t data_offset_{0};
+  uint32_t color_table_capacity_{0};  // Allocated entries in color_table_, kept across decodes
+  uint16_t bits_per_pixel_{0};
   uint8_t padding_bytes_{0};
 };
 
diff --git a/esphome/components/runtime_image/image_decoder.h b/esphome/components/runtime_image/image_decoder.h
index 6d351a10aa..2a8b393888 100644
--- a/esphome/components/runtime_image/image_decoder.h
+++ b/esphome/components/runtime_image/image_decoder.h
@@ -1,5 +1,6 @@
 #pragma once
 #include "esphome/core/color.h"
+#include "image_format.h"
 
 namespace esphome::runtime_image {
 
@@ -36,18 +37,41 @@ class ImageDecoder {
    * @brief Construct a new Image Decoder object
    *
    * @param image The RuntimeImage to decode the stream into.
+   * @param format The image format this decoder handles.
    */
-  ImageDecoder(RuntimeImage *image) : image_(image) {}
+  ImageDecoder(RuntimeImage *image, ImageFormat format) : image_(image), format_(format) {}
   virtual ~ImageDecoder() = default;
 
+  /// @brief Get the image format handled by this decoder.
+  ImageFormat get_format() const { return this->format_; }
+
+  /// @brief Check if a decoding session is in progress (prepare() called, reset() not yet).
+  bool is_active() const { return this->active_; }
+
   /**
-   * @brief Initialize the decoder.
+   * @brief Reset the decoder state, ending any decoding session.
+   *        Subclasses should override this method to reset any format-specific state.
+   *        Buffers the next decode can reuse should be kept allocated to avoid heap churn.
+   */
+  virtual void reset() {
+    this->active_ = false;
+    this->expected_size_ = 0;
+    this->decoded_bytes_ = 0;
+    this->size_valid_ = true;
+    this->x_scale_ = 1.0;
+    this->y_scale_ = 1.0;
+  }
+
+  /**
+   * @brief Initialize the decoder, starting a new decoding session.
    *
    * @param expected_size Hint about the expected data size (0 if unknown).
    * @return int          Returns 0 on success, a {@see DecodeError} value in case of an error.
    */
   virtual int prepare(size_t expected_size) {
+    this->reset();
     this->expected_size_ = expected_size;
+    this->active_ = true;
     return 0;
   }
 
@@ -103,11 +127,13 @@ class ImageDecoder {
   }
 
  protected:
+  double x_scale_ = 1.0;
+  double y_scale_ = 1.0;
   RuntimeImage *image_;
   size_t expected_size_ = 0;  // Expected data size (0 if unknown)
   size_t decoded_bytes_ = 0;  // Bytes processed so far
-  double x_scale_ = 1.0;
-  double y_scale_ = 1.0;
+  const ImageFormat format_;
+  bool active_ = false;     // A decoding session is in progress
   bool size_valid_ = true;  // Last set_size() result; draw() no-ops while false
 };
 
diff --git a/esphome/components/runtime_image/image_format.h b/esphome/components/runtime_image/image_format.h
new file mode 100644
index 0000000000..524e52d7bc
--- /dev/null
+++ b/esphome/components/runtime_image/image_format.h
@@ -0,0 +1,19 @@
+#pragma once
+
+namespace esphome::runtime_image {
+
+/**
+ * @brief Image format types that can be decoded dynamically.
+ */
+enum ImageFormat {
+  /** Automatically detect from data. Not implemented yet. */
+  AUTO,
+  /** JPEG format. */
+  JPEG,
+  /** PNG format. */
+  PNG,
+  /** BMP format. */
+  BMP,
+};
+
+}  // namespace esphome::runtime_image
diff --git a/esphome/components/runtime_image/jpeg_decoder.cpp b/esphome/components/runtime_image/jpeg_decoder.cpp
index c46e86fd0d..85ec945259 100644
--- a/esphome/components/runtime_image/jpeg_decoder.cpp
+++ b/esphome/components/runtime_image/jpeg_decoder.cpp
@@ -52,12 +52,6 @@ static int draw_callback(JPEGDRAW *jpeg) {
   return 1;
 }
 
-int JpegDecoder::prepare(size_t expected_size) {
-  ImageDecoder::prepare(expected_size);
-  // JPEG decoder needs complete data before decoding
-  return 0;
-}
-
 int HOT JpegDecoder::decode(uint8_t *buffer, size_t size) {
   // JPEG decoder requires complete data
   // If we know the expected size, wait for it
diff --git a/esphome/components/runtime_image/jpeg_decoder.h b/esphome/components/runtime_image/jpeg_decoder.h
index ed2401e263..67c9b77f4d 100644
--- a/esphome/components/runtime_image/jpeg_decoder.h
+++ b/esphome/components/runtime_image/jpeg_decoder.h
@@ -18,10 +18,9 @@ class JpegDecoder : public ImageDecoder {
    *
    * @param image The RuntimeImage to decode the stream into.
    */
-  JpegDecoder(RuntimeImage *image) : ImageDecoder(image) {}
+  JpegDecoder(RuntimeImage *image) : ImageDecoder(image, JPEG) {}
   ~JpegDecoder() override {}
 
-  int prepare(size_t expected_size) override;
   int HOT decode(uint8_t *buffer, size_t size) override;
 
  protected:
diff --git a/esphome/components/runtime_image/png_decoder.cpp b/esphome/components/runtime_image/png_decoder.cpp
index 9501702711..106f25bbe1 100644
--- a/esphome/components/runtime_image/png_decoder.cpp
+++ b/esphome/components/runtime_image/png_decoder.cpp
@@ -48,7 +48,7 @@ static void draw_callback(pngle_t *pngle, uint32_t x, uint32_t y, uint32_t w, ui
   }
 }
 
-PngDecoder::PngDecoder(RuntimeImage *image) : ImageDecoder(image) {
+PngDecoder::PngDecoder(RuntimeImage *image) : ImageDecoder(image, PNG) {
   {
     RAMAllocator<pngle_t> allocator;
     pngle_t *pngle = allocator.allocate(1, PNGLE_T_SIZE);
@@ -57,8 +57,8 @@ PngDecoder::PngDecoder(RuntimeImage *image) : ImageDecoder(image) {
       return;
     }
     memset(pngle, 0, PNGLE_T_SIZE);
-    pngle_reset(pngle);
     this->pngle_ = pngle;
+    pngle_reset(this->pngle_);
   }
 }
 
@@ -71,11 +71,12 @@ PngDecoder::~PngDecoder() {
 }
 
 int PngDecoder::prepare(size_t expected_size) {
-  ImageDecoder::prepare(expected_size);
+  // Check before the base prepare() so a failure never leaves an active session
   if (!this->pngle_) {
     ESP_LOGE(TAG, "PNG decoder engine not initialized!");
     return DECODE_ERROR_OUT_OF_MEMORY;
   }
+  ImageDecoder::prepare(expected_size);
   pngle_set_user_data(this->pngle_, this);
   pngle_set_init_callback(this->pngle_, init_callback);
   pngle_set_draw_callback(this->pngle_, draw_callback);
diff --git a/esphome/components/runtime_image/png_decoder.h b/esphome/components/runtime_image/png_decoder.h
index 24521d33a8..a1cd60e0a6 100644
--- a/esphome/components/runtime_image/png_decoder.h
+++ b/esphome/components/runtime_image/png_decoder.h
@@ -22,6 +22,14 @@ class PngDecoder : public ImageDecoder {
   PngDecoder(RuntimeImage *image);
   ~PngDecoder() override;
 
+  void reset() override {
+    ImageDecoder::reset();
+    if (this->pngle_) {
+      pngle_reset(this->pngle_);
+    }
+    this->pixels_decoded_ = 0;
+  }
+
   int prepare(size_t expected_size) override;
   int HOT decode(uint8_t *buffer, size_t size) override;
 
diff --git a/esphome/components/runtime_image/runtime_image.cpp b/esphome/components/runtime_image/runtime_image.cpp
index 8fe9be4c8c..e269f7d8f3 100644
--- a/esphome/components/runtime_image/runtime_image.cpp
+++ b/esphome/components/runtime_image/runtime_image.cpp
@@ -172,33 +172,38 @@ void RuntimeImage::draw(int x, int y, display::Display *display, Color color_on,
 }
 
 bool RuntimeImage::begin_decode(size_t expected_size) {
-  if (this->decoder_) {
+  if (this->is_decoding()) {
     ESP_LOGW(TAG, "Decoding already in progress");
     return false;
   }
 
-  this->decoder_ = this->create_decoder_();
+  // An idle decoder for a different format cannot be reused
+  if (this->decoder_ != nullptr && this->decoder_->get_format() != this->format_) {
+    ESP_LOGD(TAG, "Decoder format mismatch: current: %d, new: %d", this->decoder_->get_format(), this->format_);
+    this->decoder_ = nullptr;
+  }
+
   if (!this->decoder_) {
-    ESP_LOGE(TAG, "Failed to create decoder for format %d", this->format_);
-    return false;
+    this->decoder_ = this->create_decoder_(this->format_);
+    if (!this->decoder_) {
+      ESP_LOGE(TAG, "Failed to create decoder for format %d", this->format_);
+      return false;
+    }
   }
 
-  this->total_size_ = expected_size;
   this->decoded_bytes_ = 0;
 
-  // Initialize decoder
   int result = this->decoder_->prepare(expected_size);
   if (result < 0) {
     ESP_LOGE(TAG, "Failed to prepare decoder: %d", result);
-    this->decoder_ = nullptr;
+    this->decoder_ = nullptr;  // If prepare fails, a full reset is needed
     return false;
   }
-
   return true;
 }
 
 int RuntimeImage::feed_data(uint8_t *data, size_t len) {
-  if (!this->decoder_) {
+  if (!this->is_decoding()) {
     ESP_LOGE(TAG, "No decoder initialized");
     return -1;
   }
@@ -212,7 +217,7 @@ int RuntimeImage::feed_data(uint8_t *data, size_t len) {
 }
 
 bool RuntimeImage::end_decode() {
-  if (!this->decoder_) {
+  if (!this->is_decoding()) {
     return false;
   }
 
@@ -224,26 +229,23 @@ bool RuntimeImage::end_decode() {
     this->data_start_ = this->buffer_;
   }
 
-  // Clean up decoder
-  this->decoder_ = nullptr;
+  // End the session; the decoder object stays warm so the next decode can
+  // reuse it (and its buffers) without churning the heap.
+  this->decoder_->reset();
 
   ESP_LOGD(TAG, "Decoding complete: %dx%d, %zu bytes", this->width_, this->height_, this->decoded_bytes_);
   return true;
 }
 
-bool RuntimeImage::is_decode_finished() const {
-  if (!this->decoder_) {
-    return false;
-  }
-  return this->decoder_->is_finished();
-}
+bool RuntimeImage::is_decode_finished() const { return this->is_decoding() && this->decoder_->is_finished(); }
 
 void RuntimeImage::release() {
   this->release_buffer_();
-  // Reset decoder separately — release() can be called from within the decoder
-  // (via set_size -> resize -> resize_buffer_), so we must not destroy the decoder here.
-  // The decoder lifecycle is managed by begin_decode()/end_decode().
-  this->decoder_ = nullptr;
+  // End any active decode session; decoders free the format-specific working buffers
+  // they can (PNG), while the decoder object itself is kept warm for the next decode.
+  if (this->decoder_) {
+    this->decoder_->reset();
+  }
 }
 
 void RuntimeImage::release_buffer_() {
@@ -347,8 +349,9 @@ size_t RuntimeImage::get_buffer_size(int width, int height) const {
 
 int RuntimeImage::get_position_(int x, int y) const { return (x + y * this->buffer_width_) * this->get_bpp() / 8; }
 
-std::unique_ptr<ImageDecoder> RuntimeImage::create_decoder_() {
-  switch (this->format_) {
+std::unique_ptr<ImageDecoder> RuntimeImage::create_decoder_(ImageFormat format) {
+  ESP_LOGV(TAG, "Creating decoder for format %d", format);
+  switch (format) {
 #ifdef USE_RUNTIME_IMAGE_BMP
     case BMP:
       return make_unique<BmpDecoder>(this);
@@ -362,7 +365,7 @@ std::unique_ptr<ImageDecoder> RuntimeImage::create_decoder_() {
       return make_unique<PngDecoder>(this);
 #endif
     default:
-      ESP_LOGE(TAG, "Unsupported image format: %d", this->format_);
+      ESP_LOGE(TAG, "Unsupported image format: %d", format);
       return nullptr;
   }
 }
diff --git a/esphome/components/runtime_image/runtime_image.h b/esphome/components/runtime_image/runtime_image.h
index 10ce980be2..cfac253fdb 100644
--- a/esphome/components/runtime_image/runtime_image.h
+++ b/esphome/components/runtime_image/runtime_image.h
@@ -3,25 +3,11 @@
 #include "esphome/components/image/image.h"
 #include "esphome/core/helpers.h"
 
+#include "image_decoder.h"
+#include "image_format.h"
+
 namespace esphome::runtime_image {
 
-// Forward declaration
-class ImageDecoder;
-
-/**
- * @brief Image format types that can be decoded dynamically.
- */
-enum ImageFormat {
-  /** Automatically detect from data. Not implemented yet. */
-  AUTO,
-  /** JPEG format. */
-  JPEG,
-  /** PNG format. */
-  PNG,
-  /** BMP format. */
-  BMP,
-};
-
 /**
  * @brief A dynamic image that can be loaded and decoded at runtime.
  *
@@ -99,7 +85,7 @@ class RuntimeImage : public image::Image {
   /**
    * @brief Check if decoding is currently in progress.
    */
-  bool is_decoding() const { return this->decoder_ != nullptr; }
+  bool is_decoding() const { return this->decoder_ != nullptr && this->decoder_->is_active(); }
 
   /**
    * @brief Check if the decoder has finished processing all data.
@@ -120,9 +106,10 @@ class RuntimeImage : public image::Image {
   ImageFormat get_format() const { return this->format_; }
 
   /**
-   * @brief Release the image buffer and free memory.
+   * @brief Release the image buffer and free its memory, ending any decode session.
    *
-   * An external buffer is let go of rather than freed.
+   * An external buffer is let go of rather than freed. The decoder object is kept
+   * warm so the next decode can reuse it without churning the heap.
    */
   void release();
 
@@ -194,9 +181,11 @@ class RuntimeImage : public image::Image {
   int get_position_(int x, int y) const;
 
   /**
-   * @brief Create decoder instance for the image's format.
+   * @brief Create decoder instance for the requested format.
+   * @param format The image format to decode.
+   * @return Unique pointer to the created decoder, or nullptr on failure.
    */
-  std::unique_ptr<ImageDecoder> create_decoder_();
+  std::unique_ptr<ImageDecoder> create_decoder_(ImageFormat format);
 
   // Memory management
   uint8_t *buffer_{nullptr};
@@ -224,7 +213,6 @@ class RuntimeImage : public image::Image {
   int buffer_height_{0};
 
   // Decoding state
-  size_t total_size_{0};
   size_t decoded_bytes_{0};
 
   /** Fixed width requested on configuration, or 0 if not specified. */
diff --git a/esphome/components/rx8130/time.py b/esphome/components/rx8130/time.py
index 4f6310358c..40d10e9f6b 100644
--- a/esphome/components/rx8130/time.py
+++ b/esphome/components/rx8130/time.py
@@ -3,6 +3,9 @@ import esphome.codegen as cg
 from esphome.components import i2c, time
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@beormund"]
 DEPENDENCIES = ["i2c"]
@@ -29,7 +32,12 @@ CONFIG_SCHEMA = time.TIME_SCHEMA.extend(
     ),
     synchronous=True,
 )
-async def rx8130_write_time_to_code(config, action_id, template_arg, args):
+async def rx8130_write_time_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     return var
@@ -45,13 +53,18 @@ async def rx8130_write_time_to_code(config, action_id, template_arg, args):
     ),
     synchronous=True,
 )
-async def rx8130_read_time_to_code(config, action_id, template_arg, args):
+async def rx8130_read_time_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     return var
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
diff --git a/esphome/components/scd30/sensor.py b/esphome/components/scd30/sensor.py
index f60e913a0c..37789100f7 100644
--- a/esphome/components/scd30/sensor.py
+++ b/esphome/components/scd30/sensor.py
@@ -22,6 +22,9 @@ from esphome.const import (
     UNIT_PARTS_PER_MILLION,
     UNIT_PERCENT,
 )
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 DEPENDENCIES = ["i2c"]
 AUTO_LOAD = ["sensirion_common"]
@@ -82,7 +85,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
@@ -131,8 +134,11 @@ async def to_code(config):
     synchronous=True,
 )
 async def scd30_force_recalibration_with_reference_to_code(
-    config, action_id, template_arg, args
-):
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
     template_ = await cg.templatable(config[CONF_VALUE], args, cg.uint16)
diff --git a/esphome/components/sendspin/image/sendspin_image.cpp b/esphome/components/sendspin/image/sendspin_image.cpp
index 626d7966b7..558a292d5b 100644
--- a/esphome/components/sendspin/image/sendspin_image.cpp
+++ b/esphome/components/sendspin/image/sendspin_image.cpp
@@ -86,8 +86,8 @@ void SendspinImageSlot::on_decode_(const uint8_t *data, size_t length) {
   }
 
   const bool decoded = this->decode_frame_(data, length, target);
-  // Drops any half-finished decoder. An external buffer is let go of rather than freed, so this is
-  // safe on every path.
+  // Ends any half-finished decode session (the decoder object is kept for reuse). An external
+  // buffer is let go of rather than freed, so this is safe on every path.
   this->decode_sink_.release();
 
   if (!decoded) {
diff --git a/esphome/components/senseair/sensor.py b/esphome/components/senseair/sensor.py
index 277648137a..82368a60d0 100644
--- a/esphome/components/senseair/sensor.py
+++ b/esphome/components/senseair/sensor.py
@@ -11,6 +11,9 @@ from esphome.const import (
     STATE_CLASS_MEASUREMENT,
     UNIT_PARTS_PER_MILLION,
 )
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 DEPENDENCIES = ["uart"]
 
@@ -62,7 +65,7 @@ FINAL_VALIDATE_SCHEMA = uart.final_validate_device_schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await uart.register_uart_device(var, config)
@@ -109,6 +112,11 @@ CALIBRATION_ACTION_SCHEMA = maybe_simple_id(
     CALIBRATION_ACTION_SCHEMA,
     synchronous=True,
 )
-async def senseair_action_to_code(config, action_id, template_arg, args):
+async def senseair_action_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
diff --git a/esphome/components/servo/__init__.py b/esphome/components/servo/__init__.py
index c2eaefe455..666c7dbcdd 100644
--- a/esphome/components/servo/__init__.py
+++ b/esphome/components/servo/__init__.py
@@ -13,6 +13,9 @@ from esphome.const import (
     CONF_RESTORE,
     CONF_TRANSITION_LENGTH,
 )
+from esphome.core import ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 servo_ns = cg.esphome_ns.namespace("servo")
 Servo = servo_ns.class_("Servo", cg.Component)
@@ -39,7 +42,7 @@ CONFIG_SCHEMA = cv.Schema(
 ).extend(cv.COMPONENT_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
 
@@ -64,7 +67,12 @@ async def to_code(config):
     ),
     synchronous=True,
 )
-async def servo_write_to_code(config, action_id, template_arg, args):
+async def servo_write_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, paren)
     template_ = await cg.templatable(config[CONF_LEVEL], args, cg.float_)
@@ -82,6 +90,11 @@ async def servo_write_to_code(config, action_id, template_arg, args):
     ),
     synchronous=True,
 )
-async def servo_detach_to_code(config, action_id, template_arg, args):
+async def servo_detach_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
diff --git a/esphome/components/shelly_dimmer/light.py b/esphome/components/shelly_dimmer/light.py
index dd99fcbc90..c166076e0f 100644
--- a/esphome/components/shelly_dimmer/light.py
+++ b/esphome/components/shelly_dimmer/light.py
@@ -1,6 +1,7 @@
 import hashlib
 from pathlib import Path
 import re
+from typing import Any
 
 from esphome import external_files, pins
 import esphome.codegen as cg
@@ -66,7 +67,7 @@ KNOWN_FIRMWARE = {
 }
 
 
-def parse_firmware_version(value):
+def parse_firmware_version(value: str) -> tuple[int, int]:
     match = re.fullmatch(r"(\d+)\.(\d+)", value)
     if match is None:
         raise ValueError(f"Not a valid version number {value}")
@@ -154,7 +155,7 @@ def _extract_firmware_ref(entry: ConfigType) -> RemoteFile | None:
 PREFETCH_FILES = external_files.single_stage_prefetch(_extract_firmware_ref)
 
 
-def validate_firmware(value):
+def validate_firmware(value: ConfigType) -> ConfigType:
     config = value.copy()
     if CONF_URL not in config:
         try:
@@ -167,14 +168,14 @@ def validate_firmware(value):
     return config
 
 
-def validate_sha256(value):
+def validate_sha256(value: Any) -> str:
     value = cv.string(value)
     if not re.fullmatch(r"[0-9a-fA-F]{64}", value):
         raise ValueError(f"Not a valid SHA256 hex string: {value}")
     return value
 
 
-def validate_version(value):
+def validate_version(value: str) -> str:
     parse_firmware_version(value)
     return value
 
@@ -231,7 +232,7 @@ FINAL_VALIDATE_SCHEMA = uart.final_validate_device_schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     fw_hex = get_firmware(config[CONF_FIRMWARE])
     fw_major, fw_minor = parse_firmware_version(config[CONF_FIRMWARE][CONF_VERSION])
 
diff --git a/esphome/components/sml/__init__.py b/esphome/components/sml/__init__.py
index d25e883fa1..07ca5bf444 100644
--- a/esphome/components/sml/__init__.py
+++ b/esphome/components/sml/__init__.py
@@ -1,10 +1,12 @@
 import re
+from typing import Any
 
 from esphome import automation
 import esphome.codegen as cg
 from esphome.components import uart
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_ON_DATA
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@alengwenus"]
 
@@ -46,14 +48,14 @@ _CALLBACK_AUTOMATIONS = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await uart.register_uart_device(var, config)
     await automation.build_callback_automations(var, config, _CALLBACK_AUTOMATIONS)
 
 
-def obis_code(value):
+def obis_code(value: Any) -> str:
     value = cv.string(value)
     match = re.match(r"^\d{1,3}-\d{1,3}:\d{1,3}\.\d{1,3}\.\d{1,3}$", value)
     if match is None:
diff --git a/esphome/components/sml/sensor/__init__.py b/esphome/components/sml/sensor/__init__.py
index e6d7180f17..64ac9773c6 100644
--- a/esphome/components/sml/sensor/__init__.py
+++ b/esphome/components/sml/sensor/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import sensor
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.types import ConfigType
 
 from .. import CONF_OBIS_CODE, CONF_SERVER_ID, CONF_SML_ID, Sml, obis_code, sml_ns
 
@@ -24,7 +25,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(
         config[CONF_ID], config[CONF_SERVER_ID], config[CONF_OBIS_CODE]
     )
diff --git a/esphome/components/sml/text_sensor/__init__.py b/esphome/components/sml/text_sensor/__init__.py
index 5a5ab658c4..feff4ef256 100644
--- a/esphome/components/sml/text_sensor/__init__.py
+++ b/esphome/components/sml/text_sensor/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import text_sensor
 import esphome.config_validation as cv
 from esphome.const import CONF_FORMAT
+from esphome.types import ConfigType
 
 from .. import CONF_OBIS_CODE, CONF_SERVER_ID, CONF_SML_ID, Sml, obis_code, sml_ns
 
@@ -33,7 +34,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await text_sensor.new_text_sensor(
         config,
         config[CONF_SERVER_ID],
diff --git a/esphome/components/sn74hc595/__init__.py b/esphome/components/sn74hc595/__init__.py
index 26e5c03802..367b65176b 100644
--- a/esphome/components/sn74hc595/__init__.py
+++ b/esphome/components/sn74hc595/__init__.py
@@ -12,6 +12,8 @@ from esphome.const import (
     CONF_OUTPUT,
     CONF_TYPE,
 )
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 MULTI_CONF = True
 
@@ -65,7 +67,7 @@ CONFIG_SCHEMA = cv.typed_schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     if config[CONF_TYPE] == TYPE_GPIO:
@@ -84,7 +86,7 @@ async def to_code(config):
     cg.add(var.set_sr_count(config[CONF_SR_COUNT]))
 
 
-def _validate_output_mode(value):
+def _validate_output_mode(value: ConfigType) -> ConfigType:
     if value.get(CONF_OUTPUT) is not True:
         raise cv.Invalid("Only output mode is supported")
     return value
@@ -103,7 +105,9 @@ SN74HC595_PIN_SCHEMA = pins.gpio_base_schema(
 )
 
 
-def sn74hc595_pin_final_validate(pin_config, parent_config):
+def sn74hc595_pin_final_validate(
+    pin_config: ConfigType, parent_config: ConfigType
+) -> None:
     max_pins = parent_config[CONF_SR_COUNT] * 8
     if pin_config[CONF_NUMBER] >= max_pins:
         raise cv.Invalid(f"Pin number must be less than {max_pins}")
@@ -112,7 +116,7 @@ def sn74hc595_pin_final_validate(pin_config, parent_config):
 @pins.PIN_SCHEMA_REGISTRY.register(
     CONF_SN74HC595, SN74HC595_PIN_SCHEMA, sn74hc595_pin_final_validate
 )
-async def sn74hc595_pin_to_code(config):
+async def sn74hc595_pin_to_code(config: ConfigType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_parented(var, config[CONF_SN74HC595])
 
diff --git a/esphome/components/spa06_base/__init__.py b/esphome/components/spa06_base/__init__.py
index 97d09aad81..c995c2c087 100644
--- a/esphome/components/spa06_base/__init__.py
+++ b/esphome/components/spa06_base/__init__.py
@@ -15,6 +15,8 @@ from esphome.const import (
     UNIT_CELSIUS,
     UNIT_PASCAL,
 )
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@danielkent-net"]
 
@@ -55,7 +57,7 @@ OVERSAMPLING_OPTIONS = {
 SPA06Component = spa06_ns.class_("SPA06Component", cg.PollingComponent)
 
 
-def spa_oversample_time(oversample):
+def spa_oversample_time(oversample: str) -> float:
     # Pressure oversampling conversion times are listed on datasheet Pg. 26
     # Datasheet does not have a table for temperature oversampling;
     # assumption is that it is the same as pressure
@@ -72,7 +74,7 @@ def spa_oversample_time(oversample):
     return OVERSAMPLING_CONVERSION_TIMES[oversample]
 
 
-def spa_sample_rate(rate):
+def spa_sample_rate(rate: str) -> float:
     SAMPLE_RATE_OPTIONS_HZ = {
         "1": 1.0,
         "2": 2.0,
@@ -94,7 +96,7 @@ def spa_sample_rate(rate):
     return SAMPLE_RATE_OPTIONS_HZ[rate]
 
 
-def compute_measurement_conversion_time(config):
+def compute_measurement_conversion_time(config: ConfigType) -> int:
     # - adds up sensor conversion time based on temperature and pressure oversampling rates given in datasheet
     # - returns a rounded up time in ms
 
@@ -115,7 +117,7 @@ def compute_measurement_conversion_time(config):
     return math.ceil(1.05 * (pressure_conversion_time + temperature_conversion_time))
 
 
-def measurement_timing_check(config):
+def measurement_timing_check(config: ConfigType) -> ConfigType:
 
     temp_time = 0.0
     if temperature_config := config.get(CONF_TEMPERATURE):
@@ -176,7 +178,7 @@ CONFIG_SCHEMA_BASE = cv.Schema(
 CONFIG_SCHEMA_BASE.add_extra(measurement_timing_check)
 
 
-async def to_code_base(config):
+async def to_code_base(config: ConfigType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     if temperature_config := config.get(CONF_TEMPERATURE):
diff --git a/esphome/components/sun_gtil2/__init__.py b/esphome/components/sun_gtil2/__init__.py
index c7082794db..0f5ae27753 100644
--- a/esphome/components/sun_gtil2/__init__.py
+++ b/esphome/components/sun_gtil2/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import uart
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@Mat931"]
 MULTI_CONF = True
@@ -24,7 +25,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await uart.register_uart_device(var, config)
diff --git a/esphome/components/sun_gtil2/sensor.py b/esphome/components/sun_gtil2/sensor.py
index 55c8195391..26435cfa67 100644
--- a/esphome/components/sun_gtil2/sensor.py
+++ b/esphome/components/sun_gtil2/sensor.py
@@ -13,6 +13,7 @@ from esphome.const import (
     UNIT_VOLT,
     UNIT_WATT,
 )
+from esphome.types import ConfigType
 
 from . import CONF_SUN_GTIL2_ID, SunGTIL2Component
 
@@ -73,7 +74,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_SUN_GTIL2_ID])
     if ac_voltage_config := config.get(CONF_AC_VOLTAGE):
         sens = await sensor.new_sensor(ac_voltage_config)
diff --git a/esphome/components/sun_gtil2/text_sensor.py b/esphome/components/sun_gtil2/text_sensor.py
index f74f89b3b4..eae69fb4df 100644
--- a/esphome/components/sun_gtil2/text_sensor.py
+++ b/esphome/components/sun_gtil2/text_sensor.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import text_sensor
 import esphome.config_validation as cv
 from esphome.const import CONF_STATE
+from esphome.types import ConfigType
 
 from . import CONF_SUN_GTIL2_ID, SunGTIL2Component
 
@@ -22,7 +23,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_SUN_GTIL2_ID])
     if state_config := config.get(CONF_STATE):
         sens = await text_sensor.new_text_sensor(state_config)
diff --git a/esphome/components/sx1509/__init__.py b/esphome/components/sx1509/__init__.py
index b61b92fd1e..c1e4e11d54 100644
--- a/esphome/components/sx1509/__init__.py
+++ b/esphome/components/sx1509/__init__.py
@@ -15,6 +15,8 @@ from esphome.const import (
     CONF_PULLUP,
     CONF_TRIGGER_ID,
 )
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 CONF_KEYPAD = "keypad"
 CONF_KEYS = "keys"
@@ -40,7 +42,7 @@ SX1509KeyTrigger = sx1509_ns.class_(
 )
 
 
-def check_keys(config):
+def check_keys(config: ConfigType) -> ConfigType:
     if (
         CONF_KEYS in config
         and len(config[CONF_KEYS]) != config[CONF_KEY_ROWS] * config[CONF_KEY_COLUMNS]
@@ -82,7 +84,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
@@ -104,7 +106,7 @@ async def to_code(config):
             await automation.build_automation(trigger, [(cg.uint8, "x")], tconf)
 
 
-def validate_mode(value):
+def validate_mode(value: ConfigType) -> ConfigType:
     if not (value[CONF_INPUT] or value[CONF_OUTPUT]):
         raise cv.Invalid("Mode must be either input or output")
     if value[CONF_INPUT] and value[CONF_OUTPUT]:
@@ -142,7 +144,7 @@ SX1509_PIN_SCHEMA = cv.All(
 
 
 @pins.PIN_SCHEMA_REGISTRY.register(CONF_SX1509, SX1509_PIN_SCHEMA)
-async def sx1509_pin_to_code(config):
+async def sx1509_pin_to_code(config: ConfigType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID])
     parent = await cg.get_variable(config[CONF_SX1509])
     cg.add(var.set_parent(parent))
diff --git a/esphome/components/sx1509/binary_sensor/__init__.py b/esphome/components/sx1509/binary_sensor/__init__.py
index 0ceca77a5d..154a841348 100644
--- a/esphome/components/sx1509/binary_sensor/__init__.py
+++ b/esphome/components/sx1509/binary_sensor/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import binary_sensor
 import esphome.config_validation as cv
 from esphome.const import CONF_COL, CONF_ROW
+from esphome.types import ConfigType
 
 from .. import CONF_SX1509_ID, SX1509Component, sx1509_ns
 
@@ -18,7 +19,7 @@ CONFIG_SCHEMA = binary_sensor.binary_sensor_schema(SX1509BinarySensor).extend(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await binary_sensor.new_binary_sensor(config)
     hub = await cg.get_variable(config[CONF_SX1509_ID])
     cg.add(var.set_row_col(config[CONF_ROW], config[CONF_COL]))
diff --git a/esphome/components/sx1509/output/__init__.py b/esphome/components/sx1509/output/__init__.py
index 9e2db7bb10..aed5ab7dd4 100644
--- a/esphome/components/sx1509/output/__init__.py
+++ b/esphome/components/sx1509/output/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import output
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_PIN
+from esphome.types import ConfigType
 
 from .. import CONF_SX1509_ID, SX1509Component, sx1509_ns
 
@@ -20,7 +21,7 @@ CONFIG_SCHEMA = output.FLOAT_OUTPUT_SCHEMA.extend(
 ).extend(cv.COMPONENT_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     parent = await cg.get_variable(config[CONF_SX1509_ID])
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
diff --git a/esphome/components/sy6970/__init__.py b/esphome/components/sy6970/__init__.py
index 2390d046e4..cb9d64aee7 100644
--- a/esphome/components/sy6970/__init__.py
+++ b/esphome/components/sy6970/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import i2c
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@linkedupbits"]
 DEPENDENCIES = ["i2c"]
@@ -48,7 +49,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(
         config[CONF_ID],
         config[CONF_ENABLE_STATUS_LED],
diff --git a/esphome/components/sy6970/binary_sensor/__init__.py b/esphome/components/sy6970/binary_sensor/__init__.py
index 132b282051..c95850aadc 100644
--- a/esphome/components/sy6970/binary_sensor/__init__.py
+++ b/esphome/components/sy6970/binary_sensor/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import binary_sensor
 import esphome.config_validation as cv
 from esphome.const import DEVICE_CLASS_CONNECTIVITY, DEVICE_CLASS_POWER
+from esphome.types import ConfigType
 
 from .. import CONF_SY6970_ID, SY6970Component, sy6970_ns
 
@@ -40,7 +41,7 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     parent = await cg.get_variable(config[CONF_SY6970_ID])
 
     if vbus_connected_config := config.get(CONF_VBUS_CONNECTED):
diff --git a/esphome/components/sy6970/sensor/__init__.py b/esphome/components/sy6970/sensor/__init__.py
index e6ee9d1337..8f8090b6ee 100644
--- a/esphome/components/sy6970/sensor/__init__.py
+++ b/esphome/components/sy6970/sensor/__init__.py
@@ -9,6 +9,7 @@ from esphome.const import (
     UNIT_MILLIAMP,
     UNIT_VOLT,
 )
+from esphome.types import ConfigType
 
 from .. import CONF_SY6970_ID, SY6970Component, sy6970_ns
 
@@ -71,7 +72,7 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     parent = await cg.get_variable(config[CONF_SY6970_ID])
 
     if vbus_voltage_config := config.get(CONF_VBUS_VOLTAGE):
diff --git a/esphome/components/sy6970/text_sensor/__init__.py b/esphome/components/sy6970/text_sensor/__init__.py
index 2a4eb90811..03a55393b9 100644
--- a/esphome/components/sy6970/text_sensor/__init__.py
+++ b/esphome/components/sy6970/text_sensor/__init__.py
@@ -1,6 +1,7 @@
 import esphome.codegen as cg
 from esphome.components import text_sensor
 import esphome.config_validation as cv
+from esphome.types import ConfigType
 
 from .. import CONF_SY6970_ID, SY6970Component, sy6970_ns
 
@@ -36,7 +37,7 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     parent = await cg.get_variable(config[CONF_SY6970_ID])
 
     if bus_status_config := config.get(CONF_BUS_STATUS):
diff --git a/esphome/components/teleinfo/__init__.py b/esphome/components/teleinfo/__init__.py
index 87c7b9e85c..f9233511e1 100644
--- a/esphome/components/teleinfo/__init__.py
+++ b/esphome/components/teleinfo/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import uart
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@0hax"]
 MULTI_CONF = True
@@ -34,7 +35,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID], config[CONF_HISTORICAL_MODE])
     await cg.register_component(var, config)
     await uart.register_uart_device(var, config)
diff --git a/esphome/components/teleinfo/sensor/__init__.py b/esphome/components/teleinfo/sensor/__init__.py
index 150484d97a..b51d4cb795 100644
--- a/esphome/components/teleinfo/sensor/__init__.py
+++ b/esphome/components/teleinfo/sensor/__init__.py
@@ -7,6 +7,7 @@ from esphome.const import (
     STATE_CLASS_TOTAL_INCREASING,
     UNIT_WATT_HOURS,
 )
+from esphome.types import ConfigType
 
 from .. import CONF_TAG_NAME, CONF_TELEINFO_ID, TELEINFO_LISTENER_SCHEMA, teleinfo_ns
 
@@ -22,7 +23,7 @@ CONFIG_SCHEMA = sensor.sensor_schema(
 ).extend(TELEINFO_LISTENER_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID], config[CONF_TAG_NAME])
     await cg.register_component(var, config)
     await sensor.register_sensor(var, config)
diff --git a/esphome/components/teleinfo/text_sensor/__init__.py b/esphome/components/teleinfo/text_sensor/__init__.py
index 79fabd10d0..0b6ff11d74 100644
--- a/esphome/components/teleinfo/text_sensor/__init__.py
+++ b/esphome/components/teleinfo/text_sensor/__init__.py
@@ -1,6 +1,7 @@
 import esphome.codegen as cg
 from esphome.components import text_sensor
 from esphome.const import CONF_ID
+from esphome.types import ConfigType
 
 from .. import CONF_TAG_NAME, CONF_TELEINFO_ID, TELEINFO_LISTENER_SCHEMA, teleinfo_ns
 
@@ -13,7 +14,7 @@ CONFIG_SCHEMA = text_sensor.text_sensor_schema(TeleInfoTextSensor).extend(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID], config[CONF_TAG_NAME])
     await cg.register_component(var, config)
     await text_sensor.register_text_sensor(var, config)
diff --git a/esphome/components/tm1638/binary_sensor/__init__.py b/esphome/components/tm1638/binary_sensor/__init__.py
index de6ea35e54..4f89b7bf5e 100644
--- a/esphome/components/tm1638/binary_sensor/__init__.py
+++ b/esphome/components/tm1638/binary_sensor/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import binary_sensor
 import esphome.config_validation as cv
 from esphome.const import CONF_KEY
+from esphome.types import ConfigType
 
 from ..display import CONF_TM1638_ID, TM1638Component, tm1638_ns
 
@@ -15,7 +16,7 @@ CONFIG_SCHEMA = binary_sensor.binary_sensor_schema(TM1638Key).extend(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await binary_sensor.new_binary_sensor(config)
     cg.add(var.set_keycode(config[CONF_KEY]))
     hub = await cg.get_variable(config[CONF_TM1638_ID])
diff --git a/esphome/components/tm1638/display.py b/esphome/components/tm1638/display.py
index 14b70be94d..d6491129c6 100644
--- a/esphome/components/tm1638/display.py
+++ b/esphome/components/tm1638/display.py
@@ -10,6 +10,7 @@ from esphome.const import (
     CONF_LAMBDA,
     CONF_STB_PIN,
 )
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@skykingjwc"]
 
@@ -31,7 +32,7 @@ CONFIG_SCHEMA = display.BASIC_DISPLAY_SCHEMA.extend(
 ).extend(cv.polling_component_schema("1s"))
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await display.register_display(var, config)
 
diff --git a/esphome/components/tm1638/output/__init__.py b/esphome/components/tm1638/output/__init__.py
index b16b08d504..961abfee47 100644
--- a/esphome/components/tm1638/output/__init__.py
+++ b/esphome/components/tm1638/output/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import output
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_LED
+from esphome.types import ConfigType
 
 from ..display import CONF_TM1638_ID, TM1638Component, tm1638_ns
 
@@ -17,7 +18,7 @@ CONFIG_SCHEMA = output.BINARY_OUTPUT_SCHEMA.extend(
 ).extend(cv.COMPONENT_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await output.register_output(var, config)
     await cg.register_component(var, config)
diff --git a/esphome/components/tm1638/switch/__init__.py b/esphome/components/tm1638/switch/__init__.py
index 90ff87938c..f42b835e03 100644
--- a/esphome/components/tm1638/switch/__init__.py
+++ b/esphome/components/tm1638/switch/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import switch
 import esphome.config_validation as cv
 from esphome.const import CONF_LED
+from esphome.types import ConfigType
 
 from ..display import CONF_TM1638_ID, TM1638Component, tm1638_ns
 
@@ -20,7 +21,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await switch.new_switch(config)
     await cg.register_component(var, config)
     cg.add(var.set_lednum(config[CONF_LED]))
diff --git a/esphome/components/ufm01/__init__.py b/esphome/components/ufm01/__init__.py
index 51cf3cfd91..ca0ea57796 100644
--- a/esphome/components/ufm01/__init__.py
+++ b/esphome/components/ufm01/__init__.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import uart
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@ljungqvist"]
 
@@ -34,7 +35,7 @@ FINAL_VALIDATE_SCHEMA = uart.final_validate_device_schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await uart.register_uart_device(var, config)
diff --git a/esphome/components/ufm01/binary_sensor.py b/esphome/components/ufm01/binary_sensor.py
index 92ae585d96..59583357e4 100644
--- a/esphome/components/ufm01/binary_sensor.py
+++ b/esphome/components/ufm01/binary_sensor.py
@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import binary_sensor
 import esphome.config_validation as cv
 from esphome.const import DEVICE_CLASS_PROBLEM, ENTITY_CATEGORY_DIAGNOSTIC
+from esphome.types import ConfigType
 
 from . import CONF_UFM01_ID, UFM01Component
 
@@ -32,7 +33,7 @@ CONFIG_SCHEMA = {
 }
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     ufm01_component = await cg.get_variable(config[CONF_UFM01_ID])
 
     if ufc_chip_error_config := config.get(CONF_UFC_CHIP_ERROR):
diff --git a/esphome/components/ufm01/sensor.py b/esphome/components/ufm01/sensor.py
index 4dcd7ceebe..e3281f0b2d 100644
--- a/esphome/components/ufm01/sensor.py
+++ b/esphome/components/ufm01/sensor.py
@@ -13,6 +13,7 @@ from esphome.const import (
     UNIT_CUBIC_METER_PER_HOUR,
     UNIT_LITRE,
 )
+from esphome.types import ConfigType
 
 from . import CONF_UFM01_ID, UFM01Component
 
@@ -47,7 +48,7 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     ufm01_component = await cg.get_variable(config[CONF_UFM01_ID])
 
     if CONF_ACCUMULATED_FLOW in config:
diff --git a/esphome/components/uponor_smatrix/__init__.py b/esphome/components/uponor_smatrix/__init__.py
index 9588b0df7f..093408e868 100644
--- a/esphome/components/uponor_smatrix/__init__.py
+++ b/esphome/components/uponor_smatrix/__init__.py
@@ -2,6 +2,8 @@ import esphome.codegen as cg
 from esphome.components import time, uart
 import esphome.config_validation as cv
 from esphome.const import CONF_ADDRESS, CONF_ID, CONF_TIME_ID
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@kroimon"]
 
@@ -61,7 +63,7 @@ UPONOR_SMATRIX_DEVICE_SCHEMA = cv.Schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_global(uponor_smatrix_ns.using)
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
@@ -74,7 +76,7 @@ async def to_code(config):
             cg.add(var.set_time_device_address(time_device_address))
 
 
-async def register_uponor_smatrix_device(var, config):
+async def register_uponor_smatrix_device(var: MockObj, config: ConfigType) -> None:
     parent = await cg.get_variable(config[CONF_UPONOR_SMATRIX_ID])
     cg.add(var.set_parent(parent))
     cg.add(var.set_address(config[CONF_ADDRESS]))
diff --git a/esphome/components/uponor_smatrix/climate/__init__.py b/esphome/components/uponor_smatrix/climate/__init__.py
index 47495fde9a..e80f59df24 100644
--- a/esphome/components/uponor_smatrix/climate/__init__.py
+++ b/esphome/components/uponor_smatrix/climate/__init__.py
@@ -1,5 +1,6 @@
 import esphome.codegen as cg
 from esphome.components import climate
+from esphome.types import ConfigType
 
 from .. import (
     UPONOR_SMATRIX_DEVICE_SCHEMA,
@@ -22,7 +23,7 @@ CONFIG_SCHEMA = climate.climate_schema(UponorSmatrixClimate).extend(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await climate.new_climate(config)
     await cg.register_component(var, config)
     await register_uponor_smatrix_device(var, config)
diff --git a/esphome/components/uponor_smatrix/sensor/__init__.py b/esphome/components/uponor_smatrix/sensor/__init__.py
index f2b34538ba..52e755f005 100644
--- a/esphome/components/uponor_smatrix/sensor/__init__.py
+++ b/esphome/components/uponor_smatrix/sensor/__init__.py
@@ -13,6 +13,7 @@ from esphome.const import (
     UNIT_CELSIUS,
     UNIT_PERCENT,
 )
+from esphome.types import ConfigType
 
 from .. import (
     UPONOR_SMATRIX_DEVICE_SCHEMA,
@@ -61,7 +62,7 @@ CONFIG_SCHEMA = cv.COMPONENT_SCHEMA.extend(
 ).extend(UPONOR_SMATRIX_DEVICE_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await register_uponor_smatrix_device(var, config)
diff --git a/esphome/components/usb_uart/ch34x.cpp b/esphome/components/usb_uart/ch34x.cpp
index abfed74f94..00c5e0b069 100644
--- a/esphome/components/usb_uart/ch34x.cpp
+++ b/esphome/components/usb_uart/ch34x.cpp
@@ -95,7 +95,7 @@ void USBUartTypeCH34X::dump_config() {
   ESP_LOGCONFIG(TAG, "  CH34x chip: %s", this->chip_name_);
 }
 
-bool USBUartTypeCH34X::config_step(USBUartChannel *channel, uint8_t step, bool reload, bool ok,
+bool USBUartTypeCH34X::config_step(USBUartChannelBase *channel, uint8_t step, bool reload, bool ok,
                                    const uint8_t *response) {
   uint8_t cmd = 0xA1 + channel->index_;
   if (channel->index_ >= 2)
diff --git a/esphome/components/usb_uart/cp210x.cpp b/esphome/components/usb_uart/cp210x.cpp
index 2722ec8555..5551abe1a1 100644
--- a/esphome/components/usb_uart/cp210x.cpp
+++ b/esphome/components/usb_uart/cp210x.cpp
@@ -97,7 +97,7 @@ std::vector<CdcEps> USBUartTypeCP210X::parse_descriptors(usb_device_handle_t dev
   return cdc_devs;
 }
 
-bool USBUartTypeCP210X::config_step(USBUartChannel *channel, uint8_t step, bool reload, bool ok,
+bool USBUartTypeCP210X::config_step(USBUartChannelBase *channel, uint8_t step, bool reload, bool ok,
                                     const uint8_t *response) {
   // On reload, skip the one-time IFC_ENABLE step (the interface is already enabled).
   if (reload)
diff --git a/esphome/components/usb_uart/ft23xx.cpp b/esphome/components/usb_uart/ft23xx.cpp
index 79aa107d72..fcebf0fbd9 100644
--- a/esphome/components/usb_uart/ft23xx.cpp
+++ b/esphome/components/usb_uart/ft23xx.cpp
@@ -270,7 +270,7 @@ std::vector<CdcEps> USBUartTypeFT23XX::parse_descriptors(usb_device_handle_t dev
   return cdc_devs;
 }
 
-void USBUartTypeFT23XX::start_input(USBUartChannel *channel) {
+void USBUartTypeFT23XX::start_input(USBUartChannelBase *channel) {
   if (!channel->initialised_.load())
     return;
 
@@ -336,12 +336,12 @@ void USBUartTypeFT23XX::start_input(USBUartChannel *channel) {
   }
 }
 
-void USBUartTypeFT23XX::on_rx_overflow(USBUartChannel *channel) {
+void USBUartTypeFT23XX::on_rx_overflow(USBUartChannelBase *channel) {
   ESP_LOGW(TAG, "RX buffer overflow on channel %d, clearing to resync", channel->index_);
   channel->input_buffer_.clear();
 }
 
-bool USBUartTypeFT23XX::config_step(USBUartChannel *channel, uint8_t step, bool reload, bool ok,
+bool USBUartTypeFT23XX::config_step(USBUartChannelBase *channel, uint8_t step, bool reload, bool ok,
                                     const uint8_t *response) {
   // On reload (settings change on an open channel) skip the SIO reset; the FTDI set_termios
   // path only re-applies baud + line properties and does not re-assert DTR/RTS.
diff --git a/esphome/components/usb_uart/pl2303.cpp b/esphome/components/usb_uart/pl2303.cpp
index c56f43f75a..a9f7348331 100644
--- a/esphome/components/usb_uart/pl2303.cpp
+++ b/esphome/components/usb_uart/pl2303.cpp
@@ -226,7 +226,7 @@ static const Pl2303InitStep PL2303_INIT[] = {
 };
 static constexpr uint8_t PL2303_INIT_COUNT = sizeof(PL2303_INIT) / sizeof(PL2303_INIT[0]);
 
-bool USBUartTypePL2303::config_step(USBUartChannel *channel, uint8_t step, bool reload, bool ok,
+bool USBUartTypePL2303::config_step(USBUartChannelBase *channel, uint8_t step, bool reload, bool ok,
                                     const uint8_t *response) {
   bool is_legacy = (this->chip_type_ == PL2303_TYPE_H);
   bool is_hxn = (this->chip_type_ == PL2303_TYPE_HXN);
diff --git a/esphome/components/usb_uart/usb_uart.cpp b/esphome/components/usb_uart/usb_uart.cpp
index c289625f1a..cf66e4c369 100644
--- a/esphome/components/usb_uart/usb_uart.cpp
+++ b/esphome/components/usb_uart/usb_uart.cpp
@@ -136,7 +136,7 @@ size_t RingBuffer::pop(uint8_t *data, size_t len) {
   }
   return len;
 }
-void USBUartChannel::write_array(const uint8_t *data, size_t len) {
+void USBUartChannelBase::write_array(const uint8_t *data, size_t len) {
   if (!this->initialised_.load()) {
     ESP_LOGD(TAG, "Channel not initialised - write ignored");
     return;
@@ -170,7 +170,7 @@ void USBUartChannel::write_array(const uint8_t *data, size_t len) {
   this->parent_->start_output(this);
 }
 
-uart::UARTFlushResult USBUartChannel::flush() {
+uart::UARTFlushResult USBUartChannelBase::flush() {
   // Spin until the output queue is drained and the last USB transfer completes.
   // Safe to call from the main loop only.
   // The flush_timeout_ms_ timeout guards against a device that stops responding mid-flush;
@@ -186,14 +186,14 @@ uart::UARTFlushResult USBUartChannel::flush() {
   return uart::UARTFlushResult::UART_FLUSH_RESULT_SUCCESS;
 }
 
-bool USBUartChannel::peek_byte(uint8_t *data) {
+bool USBUartChannelBase::peek_byte(uint8_t *data) {
   if (this->input_buffer_.is_empty()) {
     return false;
   }
   *data = this->input_buffer_.peek();
   return true;
 }
-bool USBUartChannel::read_array(uint8_t *data, size_t len) {
+bool USBUartChannelBase::read_array(uint8_t *data, size_t len) {
   if (!this->initialised_.load()) {
     ESP_LOGV(TAG, "Channel not initialised - read ignored");
     return false;
@@ -277,7 +277,7 @@ void USBUartComponent::dump_config() {
                   YESNO(channel->dummy_receiver_));
   }
 }
-void USBUartComponent::start_input(USBUartChannel *channel) {
+void USBUartComponent::start_input(USBUartChannelBase *channel) {
   if (!channel->initialised_.load())
     return;
   // THREAD CONTEXT: Called from both USB task and main loop threads
@@ -346,7 +346,7 @@ void USBUartComponent::start_input(USBUartChannel *channel) {
   }
 }
 
-void USBUartComponent::start_output(USBUartChannel *channel) {
+void USBUartComponent::start_output(USBUartChannelBase *channel) {
   // THREAD CONTEXT: Called from both main loop and USB task threads.
   // The output_queue_ is a lock-free SPSC queue, so pop() is safe from either thread.
   // The output_started_ atomic flag is claimed via compare_exchange to guarantee that
@@ -491,7 +491,7 @@ void USBUartTypeCdcAcm::on_disconnected() {
   USBClient::on_disconnected();
 }
 
-bool USBUartTypeCdcAcm::config_step(USBUartChannel *channel, uint8_t step, bool reload, bool ok,
+bool USBUartTypeCdcAcm::config_step(USBUartChannelBase *channel, uint8_t step, bool reload, bool ok,
                                     const uint8_t *response) {
   static constexpr uint8_t CDC_REQUEST_TYPE = usb_host::USB_TYPE_CLASS | usb_host::USB_RECIP_INTERFACE;
   static constexpr uint8_t CDC_SET_LINE_CODING = 0x20;
@@ -537,7 +537,7 @@ void USBUartComponent::enable_channels() {
   this->start_config_(false);
 }
 
-void USBUartComponent::apply_channel_settings(USBUartChannel *channel) {
+void USBUartComponent::apply_channel_settings(USBUartChannelBase *channel) {
   if (this->cfg_active_) {
     // A config sequence is already running. Defer this reload until it finishes to preserve
     // the one-control-transfer-at-a-time guarantee (restarting mid-flight would let an
@@ -620,7 +620,7 @@ bool USBUartComponent::run_config_machine_() {
     this->cfg_ok_ = true;
   }
 
-  USBUartChannel *channel =
+  USBUartChannelBase *channel =
       this->cfg_single_ != nullptr
           ? this->cfg_single_
           : (this->cfg_channel_idx_ < this->channels_.size() ? this->channels_[this->cfg_channel_idx_] : nullptr);
@@ -664,7 +664,7 @@ bool USBUartComponent::run_config_machine_() {
   return true;
 }
 
-void USBUartChannel::load_settings(bool /*dump_config*/) {
+void USBUartChannelBase::load_settings(bool /*dump_config*/) {
   // The per-channel control transfers already log their values at debug level.
   this->parent_->apply_channel_settings(this);
 }
diff --git a/esphome/components/usb_uart/usb_uart.h b/esphome/components/usb_uart/usb_uart.h
index 5bb4c97796..00b34fb942 100644
--- a/esphome/components/usb_uart/usb_uart.h
+++ b/esphome/components/usb_uart/usb_uart.h
@@ -16,7 +16,7 @@ namespace esphome::usb_uart {
 
 class USBUartTypeCdcAcm;
 class USBUartComponent;
-class USBUartChannel;
+class USBUartChannelBase;
 class USBUartTypePL2303;
 
 static const char *const TAG = "usb_uart";
@@ -110,7 +110,7 @@ class RingBuffer {
 struct UsbDataChunk {
   uint8_t data[usb_host::USB_MAX_PACKET_SIZE];
   uint16_t length;
-  USBUartChannel *channel;
+  USBUartChannelBase *channel;
 
   // Required for EventPool - no cleanup needed for POD types
   void release() {}
@@ -126,7 +126,11 @@ struct UsbOutputChunk {
   void release() {}
 };
 
-class USBUartChannel final : public uart::UARTComponent, public Parented<USBUartComponent> {
+// Common, non-final base for all USB UART channel implementations.
+// Concrete channel types (USBUartChannel for CDC-style devices, vendor-specific
+// multiplexed channels like CH934X) derive from this and are themselves final,
+// per the "configurable classes are final" convention.
+class USBUartChannelBase : public uart::UARTComponent, public Parented<USBUartComponent> {
   friend class USBUartComponent;
   friend class USBUartTypeCdcAcm;
   friend class USBUartTypeCP210X;
@@ -139,7 +143,6 @@ class USBUartChannel final : public uart::UARTComponent, public Parented<USBUart
   // Computed as ceil(buffer_size / 64) + 1 in Python codegen; defaults to 5 (256 / 64 + 1).
   static constexpr uint8_t USB_OUTPUT_CHUNK_COUNT = USB_UART_OUTPUT_CHUNK_COUNT;
 
-  USBUartChannel(uint8_t index, uint16_t buffer_size) : input_buffer_(RingBuffer(buffer_size)), index_(index) {}
   void write_array(const uint8_t *data, size_t len) override;
   bool peek_byte(uint8_t *data) override;
   bool read_array(uint8_t *data, size_t len) override;
@@ -162,6 +165,8 @@ class USBUartChannel final : public uart::UARTComponent, public Parented<USBUart
   void set_rx_callback(std::function<void()> cb) { this->rx_callback_ = std::move(cb); }
 
  protected:
+  // Not directly instantiable; construct a concrete channel type instead.
+  USBUartChannelBase(uint8_t index, uint16_t buffer_size) : input_buffer_(RingBuffer(buffer_size)), index_(index) {}
   void check_logger_conflict() override {}
   // Larger structures first (8+ bytes)
   RingBuffer input_buffer_;
@@ -185,33 +190,40 @@ class USBUartChannel final : public uart::UARTComponent, public Parented<USBUart
   bool dummy_receiver_{};
 };
 
+// Concrete channel type for CDC-style USB serial devices (2 bulk endpoints per
+// channel). All shared behavior lives in USBUartChannelBase.
+class USBUartChannel final : public USBUartChannelBase {
+ public:
+  USBUartChannel(uint8_t index, uint16_t buffer_size) : USBUartChannelBase(index, buffer_size) {}
+};
+
 class USBUartComponent : public usb_host::USBClient {
  public:
   USBUartComponent(uint16_t vid, uint16_t pid) : usb_host::USBClient(vid, pid) {}
   void setup() override;
   void loop() override;
   void dump_config() override;
-  std::vector<USBUartChannel *> get_channels() { return this->channels_; }
+  std::vector<USBUartChannelBase *> get_channels() { return this->channels_; }
 
-  void add_channel(USBUartChannel *channel) { this->channels_.push_back(channel); }
+  void add_channel(USBUartChannelBase *channel) { this->channels_.push_back(channel); }
 
-  virtual void start_input(USBUartChannel *channel);
-  void start_output(USBUartChannel *channel);
+  virtual void start_input(USBUartChannelBase *channel);
+  void start_output(USBUartChannelBase *channel);
 
   // Begin configuring all channels (full initialisation). Called from on_connected().
   void enable_channels();
   // Re-apply line settings to a single, already-open channel (used by
-  // USBUartChannel::load_settings()).
-  void apply_channel_settings(USBUartChannel *channel);
+  // USBUartChannelBase::load_settings()).
+  void apply_channel_settings(USBUartChannelBase *channel);
 
   // Called from loop() when input_buffer_ has insufficient space for the incoming chunk.
   // Default is a no-op; override in device-specific subclasses that need resync on overflow.
-  virtual void on_rx_overflow(USBUartChannel *channel) {}
+  virtual void on_rx_overflow(USBUartChannelBase *channel) {}
 
   // Lock-free data transfer from USB task to main loop
   static constexpr int USB_DATA_QUEUE_SIZE = 32;
   LockFreeQueue<UsbDataChunk, USB_DATA_QUEUE_SIZE> usb_data_queue_;
-  // Pool sized to queue capacity (SIZE-1) — see USBUartChannel::output_pool_ comment.
+  // Pool sized to queue capacity (SIZE-1) — see USBUartChannelBase::output_pool_ comment.
   EventPool<UsbDataChunk, USB_DATA_QUEUE_SIZE - 1> chunk_pool_;
 
  protected:
@@ -231,18 +243,19 @@ class USBUartComponent : public usb_host::USBClient {
   // next control transfer via config_transfer_() and return true, or return false when the
   // channel has no more steps. reload=true ⇒ apply only baud/parity/stop/data (skip
   // enable/reset/DTR-RTS). ok/response carry the previous step's result and IN data.
-  virtual bool config_step(USBUartChannel *channel, uint8_t step, bool reload, bool ok, const uint8_t *response) = 0;
+  virtual bool config_step(USBUartChannelBase *channel, uint8_t step, bool reload, bool ok,
+                           const uint8_t *response) = 0;
   // Optional one-time device-level setup run before the per-channel phase on init only
   // (e.g. CH34x chip detection). Same contract as config_step_(). Default: no steps.
   virtual bool config_device_step(uint8_t step, bool ok, const uint8_t *response) { return false; }
 
-  std::vector<USBUartChannel *> channels_{};
+  std::vector<USBUartChannelBase *> channels_{};
 
   // Config state machine
-  USBUartChannel *cfg_single_{nullptr};          // non-null: reload of a single channel
-  USBUartChannel *cfg_pending_reload_{nullptr};  // reload requested while the machine was busy
-  std::atomic<bool> cfg_done_{false};            // synchronizes cfg_ok_/cfg_response_ across threads
-  uint8_t cfg_response_[8]{};                    // last IN transfer payload (for detection reads)
+  USBUartChannelBase *cfg_single_{nullptr};          // non-null: reload of a single channel
+  USBUartChannelBase *cfg_pending_reload_{nullptr};  // reload requested while the machine was busy
+  std::atomic<bool> cfg_done_{false};                // synchronizes cfg_ok_/cfg_response_ across threads
+  uint8_t cfg_response_[8]{};                        // last IN transfer payload (for detection reads)
   uint8_t cfg_channel_idx_{0};
   uint8_t cfg_step_{0};
   bool cfg_active_{false};
@@ -260,7 +273,7 @@ class USBUartTypeCdcAcm : public USBUartComponent {
   virtual std::vector<CdcEps> parse_descriptors(usb_device_handle_t dev_hdl);
   void on_connected() override;
   void on_disconnected() override;
-  bool config_step(USBUartChannel *channel, uint8_t step, bool reload, bool ok, const uint8_t *response) override;
+  bool config_step(USBUartChannelBase *channel, uint8_t step, bool reload, bool ok, const uint8_t *response) override;
 };
 
 class USBUartTypeCP210X : public USBUartTypeCdcAcm {
@@ -269,7 +282,7 @@ class USBUartTypeCP210X : public USBUartTypeCdcAcm {
 
  protected:
   std::vector<CdcEps> parse_descriptors(usb_device_handle_t dev_hdl) override;
-  bool config_step(USBUartChannel *channel, uint8_t step, bool reload, bool ok, const uint8_t *response) override;
+  bool config_step(USBUartChannelBase *channel, uint8_t step, bool reload, bool ok, const uint8_t *response) override;
 };
 class USBUartTypeCH34X : public USBUartTypeCdcAcm {
  public:
@@ -277,7 +290,7 @@ class USBUartTypeCH34X : public USBUartTypeCdcAcm {
   void dump_config() override;
 
  protected:
-  bool config_step(USBUartChannel *channel, uint8_t step, bool reload, bool ok, const uint8_t *response) override;
+  bool config_step(USBUartChannelBase *channel, uint8_t step, bool reload, bool ok, const uint8_t *response) override;
   bool config_device_step(uint8_t step, bool ok, const uint8_t *response) override;
   std::vector<CdcEps> parse_descriptors(usb_device_handle_t dev_hdl) override;
 
@@ -291,12 +304,12 @@ class USBUartTypeFT23XX : public USBUartTypeCdcAcm {
  public:
   USBUartTypeFT23XX(uint16_t vid, uint16_t pid) : USBUartTypeCdcAcm(vid, pid) {}
 
-  void start_input(USBUartChannel *channel) override;
-  void on_rx_overflow(USBUartChannel *channel) override;
+  void start_input(USBUartChannelBase *channel) override;
+  void on_rx_overflow(USBUartChannelBase *channel) override;
 
  protected:
   std::vector<CdcEps> parse_descriptors(usb_device_handle_t dev_hdl) override;
-  bool config_step(USBUartChannel *channel, uint8_t step, bool reload, bool ok, const uint8_t *response) override;
+  bool config_step(USBUartChannelBase *channel, uint8_t step, bool reload, bool ok, const uint8_t *response) override;
 
   uint8_t chip_type_{255};
 };
@@ -312,14 +325,14 @@ enum Pl2303ChipType : uint8_t {
 };
 
 class USBUartTypePL2303 : public USBUartTypeCdcAcm {
-  friend class USBUartChannel;
+  friend class USBUartChannelBase;
 
  public:
   USBUartTypePL2303(uint16_t vid, uint16_t pid) : USBUartTypeCdcAcm(vid, pid) {}
 
  protected:
   std::vector<CdcEps> parse_descriptors(usb_device_handle_t dev_hdl) override;
-  bool config_step(USBUartChannel *channel, uint8_t step, bool reload, bool ok, const uint8_t *response) override;
+  bool config_step(USBUartChannelBase *channel, uint8_t step, bool reload, bool ok, const uint8_t *response) override;
 
   Pl2303ChipType chip_type_{PL2303_TYPE_UNKNOWN};
 };
diff --git a/esphome/components/vl53l0x/sensor.py b/esphome/components/vl53l0x/sensor.py
index 583d6ccca9..3029e0f77b 100644
--- a/esphome/components/vl53l0x/sensor.py
+++ b/esphome/components/vl53l0x/sensor.py
@@ -1,3 +1,5 @@
+from typing import Any
+
 from esphome import pins
 import esphome.codegen as cg
 from esphome.components import i2c, sensor
@@ -10,6 +12,8 @@ from esphome.const import (
     STATE_CLASS_MEASUREMENT,
     UNIT_METER,
 )
+from esphome.core import TimePeriodMicroseconds
+from esphome.types import ConfigType
 
 DEPENDENCIES = ["i2c"]
 
@@ -23,7 +27,7 @@ CONF_LONG_RANGE = "long_range"
 CONF_TIMING_BUDGET = "timing_budget"
 
 
-def check_keys(obj):
+def check_keys(obj: ConfigType) -> ConfigType:
     if obj[CONF_ADDRESS] != 0x29 and CONF_ENABLE_PIN not in obj:
         msg = "Address other then 0x29 requires enable_pin definition to allow sensor\r"
         msg += "re-addressing. Also if you have more then one VL53 device on the same\r"
@@ -32,7 +36,7 @@ def check_keys(obj):
     return obj
 
 
-def check_timeout(value):
+def check_timeout(value: Any) -> TimePeriodMicroseconds:
     value = cv.positive_time_period_microseconds(value)
     if value.total_seconds > 60:
         raise cv.Invalid("Maximum timeout can not be greater then 60 seconds")
@@ -70,7 +74,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await sensor.new_sensor(config)
     await cg.register_component(var, config)
     cg.add(var.set_signal_rate_limit(config[CONF_SIGNAL_RATE_LIMIT]))
diff --git a/esphome/components/weikai/__init__.py b/esphome/components/weikai/__init__.py
index bc80f167ef..8f0cf4ba33 100644
--- a/esphome/components/weikai/__init__.py
+++ b/esphome/components/weikai/__init__.py
@@ -12,6 +12,8 @@ from esphome.const import (
     CONF_NUMBER,
     CONF_OUTPUT,
 )
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@DrCoolZic"]
 AUTO_LOAD = ["uart"]
@@ -26,7 +28,7 @@ WeikaiComponent = weikai_ns.class_("WeikaiComponent", cg.Component)
 WeikaiChannel = weikai_ns.class_("WeikaiChannel", uart.UARTComponent)
 
 
-def check_channel_max(value, max):
+def check_channel_max(value: ConfigType, max: int) -> ConfigType:
     channel_uniq = []
     channel_dup = []
     for x in value[CONF_UART]:
@@ -41,11 +43,11 @@ def check_channel_max(value, max):
     return value
 
 
-def check_channel_max_4(value):
+def check_channel_max_4(value: ConfigType) -> ConfigType:
     return check_channel_max(value, 4)
 
 
-def check_channel_max_2(value):
+def check_channel_max_2(value: ConfigType) -> ConfigType:
     return check_channel_max(value, 2)
 
 
@@ -70,7 +72,7 @@ WKBASE_SCHEMA = cv.Schema(
 ).extend(cv.COMPONENT_SCHEMA)
 
 
-async def register_weikai(var, config):
+async def register_weikai(var: MockObj, config: ConfigType) -> None:
     """Register an weikai device with the given config."""
     cg.add(var.set_crystal(config[CONF_CRYSTAL]))
     cg.add(var.set_test_mode(config[CONF_TEST_MODE]))
@@ -85,7 +87,7 @@ async def register_weikai(var, config):
         cg.add(chan.set_parity(uart_elem[CONF_PARITY]))
 
 
-def validate_pin_mode(value):
+def validate_pin_mode(value: ConfigType) -> ConfigType:
     """Checks input/output mode inconsistency"""
     if not (value[CONF_MODE][CONF_INPUT] or value[CONF_MODE][CONF_OUTPUT]):
         raise cv.Invalid("Mode must be either input or output")
diff --git a/esphome/components/wifi/wifi_component.cpp b/esphome/components/wifi/wifi_component.cpp
index 127eb50df1..5ed5fc9094 100644
--- a/esphome/components/wifi/wifi_component.cpp
+++ b/esphome/components/wifi/wifi_component.cpp
@@ -2396,14 +2396,6 @@ bool WiFiScanResult::matches(const WiFiAP &config) const {
   }
   return true;
 }
-bool WiFiScanResult::get_matches() const { return this->matches_; }
-void WiFiScanResult::set_matches(bool matches) { this->matches_ = matches; }
-const bssid_t &WiFiScanResult::get_bssid() const { return this->bssid_; }
-uint8_t WiFiScanResult::get_channel() const { return this->channel_; }
-int8_t WiFiScanResult::get_rssi() const { return this->rssi_; }
-bool WiFiScanResult::get_with_auth() const { return this->with_auth_; }
-bool WiFiScanResult::get_is_hidden() const { return this->is_hidden_; }
-
 bool WiFiScanResult::operator==(const WiFiScanResult &rhs) const { return this->bssid_ == rhs.bssid_; }
 
 void WiFiComponent::clear_roaming_state_() {
diff --git a/esphome/components/wifi/wifi_component.h b/esphome/components/wifi/wifi_component.h
index ea043fd5c6..c54fbc004b 100644
--- a/esphome/components/wifi/wifi_component.h
+++ b/esphome/components/wifi/wifi_component.h
@@ -319,14 +319,15 @@ class WiFiScanResult {
 
   bool matches(const WiFiAP &config) const;
 
-  bool get_matches() const;
-  void set_matches(bool matches);
-  const bssid_t &get_bssid() const;
+  bool get_matches() const { return this->matches_; }
+  void set_matches(bool matches) { this->matches_ = matches; }
+  const bssid_t &get_bssid() const { return this->bssid_; }
   StringRef get_ssid() const { return this->ssid_.ref(); }
-  uint8_t get_channel() const;
-  int8_t get_rssi() const;
-  bool get_with_auth() const;
-  bool get_is_hidden() const;
+  uint8_t get_channel() const { return this->channel_; }
+  int8_t get_rssi() const { return this->rssi_; }
+  bool get_with_auth() const { return this->with_auth_; }
+  bool get_is_hidden() const { return this->is_hidden_; }
+  bool ssid_equals(const WiFiScanResult &other) const { return this->ssid_ == other.ssid_; }
   int8_t get_priority() const { return priority_; }
   void set_priority(int8_t priority) { priority_ = priority; }
 
diff --git a/esphome/components/xl9535/__init__.py b/esphome/components/xl9535/__init__.py
index 58ce4a30f8..5686b74173 100644
--- a/esphome/components/xl9535/__init__.py
+++ b/esphome/components/xl9535/__init__.py
@@ -10,6 +10,8 @@ from esphome.const import (
     CONF_NUMBER,
     CONF_OUTPUT,
 )
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 CONF_XL9535 = "xl9535"
 
@@ -29,13 +31,13 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
 
 
-def validate_mode(mode):
+def validate_mode(mode: ConfigType) -> ConfigType:
     if not (mode[CONF_INPUT] or mode[CONF_OUTPUT]) or (
         mode[CONF_INPUT] and mode[CONF_OUTPUT]
     ):
@@ -43,7 +45,7 @@ def validate_mode(mode):
     return mode
 
 
-def validate_pin(pin):
+def validate_pin(pin: int) -> int:
     if pin in (8, 9):
         raise cv.Invalid(f"pin {pin} doesn't exist")
     return pin
@@ -67,7 +69,7 @@ XL9535_PIN_SCHEMA = cv.All(
 
 
 @pins.PIN_SCHEMA_REGISTRY.register(CONF_XL9535, XL9535_PIN_SCHEMA)
-async def xl9535_pin_to_code(config):
+async def xl9535_pin_to_code(config: ConfigType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID])
     parent = await cg.get_variable(config[CONF_XL9535])
 
diff --git a/esphome/components/zephyr_ble_server/__init__.py b/esphome/components/zephyr_ble_server/__init__.py
index 658137d1a2..463b9c0887 100644
--- a/esphome/components/zephyr_ble_server/__init__.py
+++ b/esphome/components/zephyr_ble_server/__init__.py
@@ -3,7 +3,9 @@ import esphome.codegen as cg
 from esphome.components.zephyr import zephyr_add_prj_conf
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, Framework
-from esphome.core import CORE
+from esphome.core import CORE, ID
+from esphome.cpp_generator import MockObj, TemplateArgsType
+from esphome.types import ConfigType
 
 zephyr_ble_server_ns = cg.esphome_ns.namespace("zephyr_ble_server")
 BLEServer = zephyr_ble_server_ns.class_("BLEServer", cg.Component)
@@ -32,7 +34,7 @@ _CALLBACK_AUTOMATIONS = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     zephyr_add_prj_conf("BT", True)
     zephyr_add_prj_conf("BT_PERIPHERAL", True)
@@ -65,7 +67,12 @@ BLE_NUMERIC_COMPARISON_REPLY_ACTION_SCHEMA = cv.Schema(
     BLE_NUMERIC_COMPARISON_REPLY_ACTION_SCHEMA,
     synchronous=True,
 )
-async def numeric_comparison_reply_to_code(config, action_id, template_arg, args):
+async def numeric_comparison_reply_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     parent = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, parent)
 
diff --git a/esphome/core/helpers.cpp b/esphome/core/helpers.cpp
index bd08d3b63e..a276020be4 100644
--- a/esphome/core/helpers.cpp
+++ b/esphome/core/helpers.cpp
@@ -220,6 +220,19 @@ bool str_endswith_ignore_case(const char *str, size_t str_len, const char *suffi
   return strncasecmp(str + str_len - suffix_len, suffix, suffix_len) == 0;
 }
 
+bool str_contains_ignore_case_fallback(const char *haystack, const char *needle) {
+  const size_t needle_len = strlen(needle);
+  if (needle_len == 0) {
+    return true;
+  }
+  for (const char *p = haystack; *p != '\0'; p++) {
+    if (strncasecmp(p, needle, needle_len) == 0) {
+      return true;
+    }
+  }
+  return false;
+}
+
 // str_truncate, str_until, str_lower_case, str_upper_case, str_snake_case moved to alloc_helpers.cpp
 char *str_sanitize_to(char *buffer, size_t buffer_size, const char *str) {
   if (buffer_size == 0) {
diff --git a/esphome/core/helpers.h b/esphome/core/helpers.h
index 994fa2c26a..5a9c120b84 100644
--- a/esphome/core/helpers.h
+++ b/esphome/core/helpers.h
@@ -981,6 +981,25 @@ inline bool str_endswith_ignore_case(const std::string &str, const char *suffix)
   return str_endswith_ignore_case(str.c_str(), str.size(), suffix, strlen(suffix));
 }
 
+/// Fallback implementation for case insensitive substring comparison.
+bool str_contains_ignore_case_fallback(const char *haystack, const char *needle);
+
+/// Case-insensitive check if needle string is contained in haystack (no heap allocation).
+inline bool str_contains_ignore_case(const char *haystack, const char *needle) {
+  if (!needle || !haystack) {
+    return false;
+  }
+
+// strcasestr is a GNU extension: newlib only declares it when _GNU_SOURCE is set.
+// ESP32/ESP8266/host builds get it from their framework or from g++ on Linux;
+// LibreTiny, RP2 and Zephyr do not, so they use the hand-rolled fallback.
+#if defined(USE_LIBRETINY) || defined(USE_RP2) || defined(USE_ZEPHYR)
+  return str_contains_ignore_case_fallback(haystack, needle);
+#else   // defined(USE_LIBRETINY) || defined(USE_RP2) || defined(USE_ZEPHYR)
+  return strcasestr(haystack, needle) != nullptr;
+#endif  // defined(USE_LIBRETINY) || defined(USE_RP2) || defined(USE_ZEPHYR)
+}
+
 // str_truncate moved to alloc_helpers.h - remove this include before 2026.11.0
 
 // str_until, str_lower_case, str_upper_case moved to alloc_helpers.h - remove this comment before 2026.11.0
diff --git a/requirements.txt b/requirements.txt
index 04844f67dc..5ff6dc6bc4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ pyserial==3.5
 platformio==6.1.19
 esptool==5.3.1
 click==8.3.3
-aioesphomeapi==45.12.0
+aioesphomeapi==45.13.1
 aiohappyeyeballs==2.7.1  # Happy Eyeballs for requests downloads; already pulled in by aioesphomeapi
 zeroconf==0.150.0
 puremagic==2.2.0
diff --git a/requirements_test.txt b/requirements_test.txt
index cedc107b17..079c375c01 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -2,7 +2,7 @@ pylint==4.0.7
 flake8==7.3.0  # also change in .pre-commit-config.yaml when updating
 ruff==0.16.3  # also change in .pre-commit-config.yaml when updating
 pyupgrade==3.21.2  # also change in .pre-commit-config.yaml when updating
-prek==0.4.13  # also change in .github/workflows/ci.yml when updating
+prek==0.4.14  # also change in .github/workflows/ci.yml when updating
 
 # Unit tests
 pytest==9.1.1
diff --git a/tests/component_tests/deep_sleep/test_deep_sleep.py b/tests/component_tests/deep_sleep/test_deep_sleep.py
index f105ed5888..e68b1d17cc 100644
--- a/tests/component_tests/deep_sleep/test_deep_sleep.py
+++ b/tests/component_tests/deep_sleep/test_deep_sleep.py
@@ -1,5 +1,13 @@
 """Tests for the deep sleep component."""
 
+import pytest
+
+from esphome import config_validation as cv
+from esphome.components import deep_sleep
+from esphome.const import CONF_WAKEUP_PIN, PlatformFramework
+
+from ..types import SetCoreConfigCallable
+
 
 def test_deep_sleep_setup(generate_main):
     """
@@ -83,3 +91,35 @@ def test_deep_sleep_run_duration_dictionary(generate_main):
         "    .gpio_cause = 30000,\n"
         "});"
     ) in main_cpp
+
+
+def test_deep_sleep_bk72xx_wakeup_pin_mode_at_both_levels_rejected(
+    set_core_config: SetCoreConfigCallable,
+) -> None:
+    """On BK72xx, wakeup_pin_mode at the top level and under the pin entry is an error."""
+    set_core_config(PlatformFramework.BK72XX_ARDUINO)
+    config = {
+        CONF_WAKEUP_PIN: [
+            {"pin": "GPIO12", deep_sleep.CONF_WAKEUP_PIN_MODE: "KEEP_AWAKE"}
+        ],
+        deep_sleep.CONF_WAKEUP_PIN_MODE: "INVERT_WAKEUP",
+    }
+    with pytest.raises(cv.Invalid, match="not both"):
+        deep_sleep.validate_config(config)
+
+
+def test_deep_sleep_bk72xx_top_level_wakeup_pin_mode_moved_onto_single_pin(
+    set_core_config: SetCoreConfigCallable,
+) -> None:
+    """On BK72xx, a top-level wakeup_pin_mode is moved onto the only pin entry."""
+    set_core_config(PlatformFramework.BK72XX_ARDUINO)
+    config = {
+        CONF_WAKEUP_PIN: [{"pin": "GPIO12"}],
+        deep_sleep.CONF_WAKEUP_PIN_MODE: "INVERT_WAKEUP",
+    }
+    result = deep_sleep.validate_config(config)
+
+    assert deep_sleep.CONF_WAKEUP_PIN_MODE not in result
+    assert (
+        result[CONF_WAKEUP_PIN][0][deep_sleep.CONF_WAKEUP_PIN_MODE] == "INVERT_WAKEUP"
+    )
diff --git a/tests/component_tests/emontx/__init__.py b/tests/component_tests/emontx/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/tests/component_tests/emontx/test_sensor_defaults.py b/tests/component_tests/emontx/test_sensor_defaults.py
new file mode 100644
index 0000000000..00d24d282e
--- /dev/null
+++ b/tests/component_tests/emontx/test_sensor_defaults.py
@@ -0,0 +1,100 @@
+"""Tests for emontx sensor tag defaults."""
+
+import pytest
+
+from esphome.components import sensor
+from esphome.components.emontx.sensor import CONFIG_SCHEMA, apply_tag_defaults
+from esphome.const import (
+    CONF_ACCURACY_DECIMALS,
+    CONF_STATE_CLASS,
+    STATE_CLASS_MEASUREMENT,
+    STATE_CLASS_TOTAL_INCREASING,
+)
+
+
+def _resolve_via_config_schema(tag: str) -> dict:
+    """Run a minimal config through the real CONFIG_SCHEMA pipeline, the
+    same path a user's YAML goes through."""
+    return CONFIG_SCHEMA(
+        {"tag_name": tag, "emontx_id": "my_emontx", "name": f"{tag} sensor"}
+    )
+
+
+def test_config_schema_applies_tag_default_state_class():
+    """If sensor_schema(state_class=...) is reintroduced, the schema-level
+    default wins over apply_tag_defaults' per-prefix value, and E1 would
+    resolve to measurement instead of total_increasing. Driving the real
+    CONFIG_SCHEMA (not just apply_tag_defaults) catches that, since
+    sensor_schema() runs before apply_tag_defaults in the cv.All() chain.
+    """
+    result = _resolve_via_config_schema("E1")
+    assert result[CONF_STATE_CLASS] == sensor.validate_state_class(
+        STATE_CLASS_TOTAL_INCREASING
+    )
+
+
+def test_config_schema_applies_tag_default_accuracy_decimals():
+    """Same root cause as the state_class regression: reintroducing
+    sensor_schema(accuracy_decimals=...) would make V1 resolve to the
+    schema-level default instead of the prefix-specific value of 2.
+    """
+    result = _resolve_via_config_schema("V1")
+    assert result[CONF_ACCURACY_DECIMALS] == 2
+
+
+def _make_config(tag: str) -> dict:
+    """Minimal config dict with only tag_name set — no overrides."""
+    return {"tag_name": tag}
+
+
+@pytest.mark.parametrize(
+    ("tag", "expected_state_class", "expected_decimals"),
+    [
+        # Known numeric-index prefixes
+        ("E1", STATE_CLASS_TOTAL_INCREASING, 0),
+        ("E12", STATE_CLASS_TOTAL_INCREASING, 0),
+        ("P1", STATE_CLASS_MEASUREMENT, 0),
+        ("V1", STATE_CLASS_MEASUREMENT, 2),
+        ("I1", STATE_CLASS_MEASUREMENT, 2),
+        ("T1", STATE_CLASS_MEASUREMENT, 2),
+        # Known patterns
+        ("PULSE1", STATE_CLASS_TOTAL_INCREASING, 0),
+        ("PULSE12", STATE_CLASS_TOTAL_INCREASING, 0),
+        ("PF1", STATE_CLASS_MEASUREMENT, 2),
+        # Unknown / free-form tags fall back to generic defaults
+        ("CUSTOM1", STATE_CLASS_MEASUREMENT, 0),
+        ("X", STATE_CLASS_MEASUREMENT, 0),
+    ],
+)
+def test_apply_tag_defaults(tag, expected_state_class, expected_decimals):
+    """apply_tag_defaults must inject the correct state_class and accuracy_decimals
+    for each tag type when no user overrides are present."""
+    config = _make_config(tag)
+    result = apply_tag_defaults(config)
+
+    assert result[CONF_STATE_CLASS] == sensor.validate_state_class(expected_state_class)
+    assert result[CONF_ACCURACY_DECIMALS] == expected_decimals
+
+
+@pytest.mark.parametrize(
+    ("tag", "user_state_class", "user_decimals"),
+    [
+        # User overrides must not be clobbered by defaults
+        ("E1", STATE_CLASS_MEASUREMENT, 3),
+        ("PULSE1", STATE_CLASS_MEASUREMENT, 1),
+        ("V1", STATE_CLASS_TOTAL_INCREASING, 0),
+        ("CUSTOM1", STATE_CLASS_TOTAL_INCREASING, 4),
+    ],
+)
+def test_apply_tag_defaults_respects_user_overrides(
+    tag, user_state_class, user_decimals
+):
+    """apply_tag_defaults must not overwrite values already set by the user."""
+    config = _make_config(tag)
+    config[CONF_STATE_CLASS] = sensor.validate_state_class(user_state_class)
+    config[CONF_ACCURACY_DECIMALS] = user_decimals
+
+    result = apply_tag_defaults(config)
+
+    assert result[CONF_STATE_CLASS] == sensor.validate_state_class(user_state_class)
+    assert result[CONF_ACCURACY_DECIMALS] == user_decimals
diff --git a/tests/components/captive_portal/__init__.py b/tests/components/captive_portal/__init__.py
new file mode 100644
index 0000000000..1ac0704a59
--- /dev/null
+++ b/tests/components/captive_portal/__init__.py
@@ -0,0 +1,10 @@
+from tests.testing_helpers import ComponentManifestOverride
+
+
+def override_manifest(manifest: ComponentManifestOverride) -> None:
+    # The scan list helper is header-only and needs none of the component's real
+    # dependencies. Pulling them in breaks the host build: web_server_base
+    # includes ESPAsyncWebServer.h and ota.web_server includes md5/md5.h, neither
+    # of which exists there.
+    manifest.dependencies = []
+    manifest.auto_load = []
diff --git a/tests/components/captive_portal/scan_list_test.cpp b/tests/components/captive_portal/scan_list_test.cpp
new file mode 100644
index 0000000000..f67581dc0b
--- /dev/null
+++ b/tests/components/captive_portal/scan_list_test.cpp
@@ -0,0 +1,130 @@
+#include <gtest/gtest.h>
+
+#include <cstdint>
+#include <string>
+#include <vector>
+
+#include "esphome/components/captive_portal/scan_list.h"
+
+namespace esphome::captive_portal::testing {
+
+namespace {
+
+// Stand-in for wifi::WiFiScanResult, which does not compile on the host.
+struct Entry {
+  std::string ssid;
+  int8_t rssi;
+  bool with_auth{true};
+  bool is_hidden{false};
+
+  // Compares length and bytes like CompactString does, so an embedded NUL counts.
+  bool ssid_equals(const Entry &other) const { return this->ssid == other.ssid; }
+  int8_t get_rssi() const { return this->rssi; }
+  bool get_with_auth() const { return this->with_auth; }
+  bool get_is_hidden() const { return this->is_hidden; }
+};
+
+// One row as the portal would emit it.
+struct Row {
+  std::string ssid;
+  int8_t rssi;
+  bool lock;
+
+  bool operator==(const Row &rhs) const { return ssid == rhs.ssid && rssi == rhs.rssi && lock == rhs.lock; }
+};
+
+// Walk the results the way handle_config does and collect the rows that survive.
+std::vector<Row> rows(const std::vector<Entry> &results) {
+  std::vector<Row> out;
+  for (size_t i = 0; i < results.size(); i++) {
+    bool with_auth = false;
+    if (!should_show_scan_entry(results, results[i], with_auth))
+      continue;
+    out.push_back({results[i].ssid, results[i].rssi, with_auth});
+  }
+  return out;
+}
+
+}  // namespace
+
+TEST(ScanList, SingleEntryShown) {
+  std::vector<Entry> results = {{"Home", -60}};
+  EXPECT_EQ(rows(results), (std::vector<Row>{{"Home", -60, true}}));
+}
+
+TEST(ScanList, DistinctSsidsAllShownInOrder) {
+  std::vector<Entry> results = {{"Home", -60}, {"Guest", -70}, {"Cafe", -40}};
+  EXPECT_EQ(rows(results), (std::vector<Row>{{"Home", -60, true}, {"Guest", -70, true}, {"Cafe", -40, true}}));
+}
+
+// Results are ordered by connection preference, not RSSI, so the strongest entry
+// can sit anywhere in the list.
+TEST(ScanList, SameSsidKeepsStrongest) {
+  std::vector<Entry> results = {{"Home", -70}, {"Home", -50}, {"Home", -60}};
+  EXPECT_EQ(rows(results), (std::vector<Row>{{"Home", -50, true}}));
+}
+
+TEST(ScanList, EqualRssiKeepsFirst) {
+  std::vector<Entry> results = {{"Home", -60}, {"Home", -60}, {"Home", -60}};
+  bool with_auth = false;
+  EXPECT_TRUE(should_show_scan_entry(results, results[0], with_auth));
+  EXPECT_FALSE(should_show_scan_entry(results, results[1], with_auth));
+  EXPECT_FALSE(should_show_scan_entry(results, results[2], with_auth));
+  EXPECT_EQ(rows(results), (std::vector<Row>{{"Home", -60, true}}));
+}
+
+// with_auth is an out-parameter that must only be written for a shown entry.
+TEST(ScanList, WithAuthUntouchedWhenNotShown) {
+  std::vector<Entry> results = {{"Home", -50, false}, {"Home", -70, true}};
+  bool with_auth = false;
+  EXPECT_FALSE(should_show_scan_entry(results, results[1], with_auth));
+  EXPECT_FALSE(with_auth);
+}
+
+TEST(ScanList, DuplicatesInterleavedWithOtherNetworks) {
+  std::vector<Entry> results = {{"Home", -70}, {"Guest", -55}, {"Home", -50}, {"Guest", -65}};
+  EXPECT_EQ(rows(results), (std::vector<Row>{{"Guest", -55, true}, {"Home", -50, true}}));
+}
+
+// Hidden networks scan with an empty SSID. They are never listed and do not
+// collapse into each other or into anything else.
+TEST(ScanList, HiddenEntriesNeverShown) {
+  std::vector<Entry> results = {{"", -40, true, true}, {"Home", -70}, {"", -30, true, true}};
+  EXPECT_EQ(rows(results), (std::vector<Row>{{"Home", -70, true}}));
+}
+
+// On ESP8266 the hidden flag comes from the driver alongside a real SSID, so a
+// hidden access point can share its name with a visible one. It must not
+// outrank that visible entry and leave the network unlisted.
+TEST(ScanList, HiddenEntryDoesNotSuppressVisibleSameSsid) {
+  std::vector<Entry> results = {{"Home", -40, true, true}, {"Home", -70}};
+  EXPECT_EQ(rows(results), (std::vector<Row>{{"Home", -70, true}}));
+}
+
+// An open access point and a secured one sharing an SSID collapse to one row that
+// still asks for a password, whichever of them is strongest.
+TEST(ScanList, LockSetWhenAnyEntryRequiresAuth) {
+  std::vector<Entry> open_stronger = {{"Home", -50, false}, {"Home", -70, true}};
+  EXPECT_EQ(rows(open_stronger), (std::vector<Row>{{"Home", -50, true}}));
+
+  std::vector<Entry> secured_stronger = {{"Home", -70, false}, {"Home", -50, true}};
+  EXPECT_EQ(rows(secured_stronger), (std::vector<Row>{{"Home", -50, true}}));
+}
+
+TEST(ScanList, LockClearWhenEveryEntryIsOpen) {
+  std::vector<Entry> results = {{"Cafe", -60, false}, {"Cafe", -50, false}};
+  EXPECT_EQ(rows(results), (std::vector<Row>{{"Cafe", -50, false}}));
+}
+
+// The auth flag of an unrelated network must not leak into another SSID's row.
+TEST(ScanList, LockIsPerSsid) {
+  std::vector<Entry> results = {{"Cafe", -60, false}, {"Home", -50, true}};
+  EXPECT_EQ(rows(results), (std::vector<Row>{{"Cafe", -60, false}, {"Home", -50, true}}));
+}
+
+TEST(ScanList, EmptyListShowsNothing) {
+  std::vector<Entry> results;
+  EXPECT_TRUE(rows(results).empty());
+}
+
+}  // namespace esphome::captive_portal::testing
diff --git a/tests/components/core/helpers_test.cpp b/tests/components/core/helpers_test.cpp
index a9a940392f..d5219f9d47 100644
--- a/tests/components/core/helpers_test.cpp
+++ b/tests/components/core/helpers_test.cpp
@@ -83,4 +83,50 @@ TEST(StaticVectorTest, ConvertingConstructorSameSize) {
   EXPECT_EQ(dst[2], 3);
 }
 
+TEST(StringContainsIgnoreCaseTest, NullPointerAlwaysFalse) {
+  const char *haystack = nullptr;
+  const char *needle = nullptr;
+
+  EXPECT_FALSE(str_contains_ignore_case(haystack, needle));
+  EXPECT_FALSE(str_contains_ignore_case("Hello World", needle));
+  EXPECT_FALSE(str_contains_ignore_case(haystack, "anything"));
+}
+
+TEST(StringContainsIgnoreCaseTest, EmptySearchMatches) {
+  const char *haystack = "Hello World";
+
+  EXPECT_TRUE(str_contains_ignore_case_fallback(haystack, ""));
+}
+
+TEST(StringContainsIgnoreCaseTest, MiscCaseMatches) {
+  const char *haystack = "Hello World";
+
+  EXPECT_TRUE(str_contains_ignore_case_fallback(haystack, "Hello"));
+  EXPECT_TRUE(str_contains_ignore_case_fallback(haystack, "hello"));
+  EXPECT_TRUE(str_contains_ignore_case_fallback(haystack, "HELLO"));
+  EXPECT_TRUE(str_contains_ignore_case_fallback(haystack, "hELLO"));
+}
+
+TEST(StringContainsIgnoreCaseTest, MiscNotMatching) {
+  const char *haystack = "Hello World";
+
+  // Expected to match
+  EXPECT_TRUE(str_contains_ignore_case_fallback(haystack, "Hell"));
+
+  // Expected not to match
+  EXPECT_FALSE(str_contains_ignore_case_fallback(haystack, "Heaven"));
+  EXPECT_FALSE(str_contains_ignore_case_fallback(haystack, "Hello!"));
+  EXPECT_FALSE(str_contains_ignore_case_fallback(haystack, "world!"));
+}
+
+TEST(StringContainsIgnoreCaseTest, FallbackMatchesLibc) {
+  const char *haystack = "Hello World";
+  for (const char *needle : {"", "Hello", "hELLO", "Hell", "world", "Heaven", "Hello!", "d"}) {
+    EXPECT_EQ(str_contains_ignore_case_fallback(haystack, needle), str_contains_ignore_case(haystack, needle))
+        << "needle: " << needle;
+  }
+  EXPECT_EQ(str_contains_ignore_case_fallback("", ""), str_contains_ignore_case("", ""));
+  EXPECT_EQ(str_contains_ignore_case_fallback("ab", "abc"), str_contains_ignore_case("ab", "abc"));
+}
+
 }  // namespace esphome
diff --git a/tests/components/emontx/test.esp32-idf.yaml b/tests/components/emontx/test.esp32-idf.yaml
index a0784fcd53..e56b1bda5d 100644
--- a/tests/components/emontx/test.esp32-idf.yaml
+++ b/tests/components/emontx/test.esp32-idf.yaml
@@ -1,4 +1,3 @@
 packages:
   uart_115200: !include ../../test_build_components/common/uart_115200/esp32-idf.yaml
-
-<<: !include common.yaml
+  emontx: !include common.yaml
diff --git a/tests/components/emontx/test.esp8266-ard.yaml b/tests/components/emontx/test.esp8266-ard.yaml
index 80a2cb2fc0..9ec9377437 100644
--- a/tests/components/emontx/test.esp8266-ard.yaml
+++ b/tests/components/emontx/test.esp8266-ard.yaml
@@ -1,4 +1,3 @@
 packages:
   uart_115200: !include ../../test_build_components/common/uart_115200/esp8266-ard.yaml
-
-<<: !include common.yaml
+  emontx: !include common.yaml
diff --git a/tests/components/emontx/test.rp2040-ard.yaml b/tests/components/emontx/test.rp2040-ard.yaml
index 410c579d4b..6f4952d8e5 100644
--- a/tests/components/emontx/test.rp2040-ard.yaml
+++ b/tests/components/emontx/test.rp2040-ard.yaml
@@ -1,4 +1,3 @@
 packages:
   uart_115200: !include ../../test_build_components/common/uart_115200/rp2040-ard.yaml
-
-<<: !include common.yaml
+  emontx: !include common.yaml
diff --git a/tests/components/emontx/validate.esp32-idf.yaml b/tests/components/emontx/validate.esp32-idf.yaml
new file mode 100644
index 0000000000..7caee78a07
--- /dev/null
+++ b/tests/components/emontx/validate.esp32-idf.yaml
@@ -0,0 +1,73 @@
+packages:
+  uart_115200: !include ../../test_build_components/common/uart_115200/esp32-idf.yaml
+  emontx: !include common.yaml
+
+# Validate that each sensor type gets the correct default state_class,
+# unit_of_measurement, device_class, and accuracy_decimals when NO overrides
+# are provided. The values are intentionally omitted so apply_tag_defaults is
+# exercised, not the user-override path.
+
+sensor:
+  # Energy sensor (E prefix): expects state_class=total_increasing, unit=Wh,
+  # device_class=energy, accuracy_decimals=0
+  - platform: emontx
+    tag_name: E1
+    name: Energy 1
+    emontx_id: test_emontx
+
+  # Power sensor (P prefix): expects state_class=measurement, unit=W,
+  # device_class=power, accuracy_decimals=0
+  - platform: emontx
+    tag_name: P1
+    name: Power 1
+    emontx_id: test_emontx
+
+  # Voltage sensor (V prefix): expects state_class=measurement, unit=V,
+  # device_class=voltage, accuracy_decimals=2
+  - platform: emontx
+    tag_name: V1
+    name: Voltage 1
+    emontx_id: test_emontx
+
+  # Current sensor (I prefix): expects state_class=measurement, unit=A,
+  # device_class=current, accuracy_decimals=2
+  - platform: emontx
+    tag_name: I1
+    name: Current 1
+    emontx_id: test_emontx
+
+  # Temperature sensor (T prefix): expects state_class=measurement, unit=°C,
+  # device_class=temperature, accuracy_decimals=2
+  - platform: emontx
+    tag_name: T1
+    name: Temperature 1
+    emontx_id: test_emontx
+
+  # Pulse sensor (PULSE pattern): expects state_class=total_increasing,
+  # unit=pulses, device_class=energy, accuracy_decimals=0
+  - platform: emontx
+    tag_name: PULSE1
+    name: Pulse 1
+    emontx_id: test_emontx
+
+  # Power factor sensor (PF pattern): expects state_class=measurement,
+  # device_class=power_factor, accuracy_decimals=2
+  - platform: emontx
+    tag_name: PF1
+    name: Power Factor 1
+    emontx_id: test_emontx
+
+  # Unknown tag: no prefix match, falls back to state_class=measurement,
+  # accuracy_decimals=0
+  - platform: emontx
+    tag_name: CUSTOM1
+    name: Custom sensor
+    emontx_id: test_emontx
+
+  # User override: verify that explicit values are respected and not clobbered
+  - platform: emontx
+    tag_name: E2
+    name: Energy 2 (user override)
+    emontx_id: test_emontx
+    state_class: measurement
+    accuracy_decimals: 3
diff --git a/tests/components/esp32_hosted/test-embedded.esp32-p4-idf.yaml b/tests/components/esp32_hosted/test-embedded.esp32-p4-idf.yaml
index 9640032b34..5cf33179ba 100644
--- a/tests/components/esp32_hosted/test-embedded.esp32-p4-idf.yaml
+++ b/tests/components/esp32_hosted/test-embedded.esp32-p4-idf.yaml
@@ -6,3 +6,6 @@ update:
     type: embedded
     path: $component_dir/test_firmware.bin
     sha256: de2f256064a0af797747c2b97505dc0b9f3df0de4f489eac731c23ae9ca9cc31
+    on_update_available:
+      then:
+        - logger.log: "Coprocessor update available"
diff --git a/tests/components/esp32_hosted/test-http.esp32-p4-idf.yaml b/tests/components/esp32_hosted/test-http.esp32-p4-idf.yaml
index 17cde0f35d..88b620cfe8 100644
--- a/tests/components/esp32_hosted/test-http.esp32-p4-idf.yaml
+++ b/tests/components/esp32_hosted/test-http.esp32-p4-idf.yaml
@@ -8,3 +8,6 @@ update:
     type: http
     source: https://esphome.github.io/esp-hosted-firmware/manifest/esp32c6.json
     update_interval: 6h
+    on_update_available:
+      then:
+        - logger.log: "Coprocessor update available"
diff --git a/tests/components/mitsubishi_cn105/climate/mitsubishi_cn105_climate_tests.cpp b/tests/components/mitsubishi_cn105/climate/mitsubishi_cn105_climate_tests.cpp
index 36e0fc90b4..b91252c9fa 100644
--- a/tests/components/mitsubishi_cn105/climate/mitsubishi_cn105_climate_tests.cpp
+++ b/tests/components/mitsubishi_cn105/climate/mitsubishi_cn105_climate_tests.cpp
@@ -1,7 +1,67 @@
+#include <array>
+#include <utility>
 #include "../common.h"
 
 namespace esphome::mitsubishi_cn105::testing {
 
+TEST(MitsubishiCN105ClimateTests, CelsiusTemperatureMappingAndTraitsMatchExpectedValues) {
+  TestableMitsubishiCN105Climate sut;
+  const auto mapping = TemperatureMapping();
+
+  for (int temperature = 16; temperature <= 31; ++temperature) {
+    EXPECT_EQ(mapping.to_mitsubishi(temperature), temperature);
+    EXPECT_EQ(mapping.from_mitsubishi(temperature), temperature);
+  }
+
+  const auto traits = sut.traits();
+  EXPECT_EQ(traits.get_temperature_unit(), TemperatureUnit::CELSIUS);
+  EXPECT_FLOAT_EQ(traits.get_visual_min_temperature(), 16.0f);
+  EXPECT_FLOAT_EQ(traits.get_visual_max_temperature(), 31.0f);
+  EXPECT_FLOAT_EQ(traits.get_visual_target_temperature_step(), 1.0f);
+  EXPECT_FLOAT_EQ(traits.get_visual_current_temperature_step(), 0.5f);
+}
+
+TEST(MitsubishiCN105ClimateTests, FahrenheitTemperatureMappingAndTraitsMatchExpectedValues) {
+  TestableMitsubishiCN105Climate sut;
+  auto mapping = TemperatureMapping();
+  mapping.set_use_fahrenheit(true);
+  sut.set_use_fahrenheit(true);
+
+  const std::array cases{
+      std::pair{61, 16.0f}, std::pair{62, 16.5f}, std::pair{63, 17.0f}, std::pair{64, 17.5f}, std::pair{65, 18.0f},
+      std::pair{66, 18.5f}, std::pair{67, 19.0f}, std::pair{68, 20.0f}, std::pair{69, 21.0f}, std::pair{70, 21.5f},
+      std::pair{71, 22.0f}, std::pair{72, 22.5f}, std::pair{73, 23.0f}, std::pair{74, 23.5f}, std::pair{75, 24.0f},
+      std::pair{76, 24.5f}, std::pair{77, 25.0f}, std::pair{78, 25.5f}, std::pair{79, 26.0f}, std::pair{80, 26.5f},
+      std::pair{81, 27.0f}, std::pair{82, 27.5f}, std::pair{83, 28.0f}, std::pair{84, 28.5f}, std::pair{85, 29.0f},
+      std::pair{86, 29.5f}, std::pair{87, 30.0f}, std::pair{88, 30.5f},
+  };
+
+  for (const auto &[fahrenheit, mitsubishi_celsius] : cases) {
+    EXPECT_FLOAT_EQ(mapping.to_mitsubishi(fahrenheit), mitsubishi_celsius);
+    EXPECT_FLOAT_EQ(mapping.from_mitsubishi(mitsubishi_celsius), fahrenheit);
+  }
+  const auto traits = sut.traits();
+  EXPECT_EQ(traits.get_temperature_unit(), TemperatureUnit::FAHRENHEIT);
+  EXPECT_FLOAT_EQ(traits.get_visual_min_temperature(), 61.0f);
+  EXPECT_FLOAT_EQ(traits.get_visual_max_temperature(), 88.0f);
+  EXPECT_FLOAT_EQ(traits.get_visual_target_temperature_step(), 1.0f);
+  EXPECT_FLOAT_EQ(traits.get_visual_current_temperature_step(), 1.0f);
+}
+
+TEST(MitsubishiCN105ClimateTests, FahrenheitTemperatureMappingUsesLinearConversionOutsideSetpointRange) {
+  auto mapping = TemperatureMapping();
+  mapping.set_use_fahrenheit(true);
+
+  const std::array cases{
+      std::pair{0.0f, 32.0f},  std::pair{10.0f, 50.0f}, std::pair{15.5f, 59.9f},
+      std::pair{31.0f, 87.8f}, std::pair{35.0f, 95.0f}, std::pair{40.0f, 104.0f},
+  };
+
+  for (const auto &[celsius, fahrenheit] : cases) {
+    EXPECT_FLOAT_EQ(mapping.from_mitsubishi(celsius), fahrenheit);
+  }
+}
+
 TEST(MitsubishiCN105ClimateTests, SupportedSwingModeOffLeavesTraitsEmpty) {
   TestableMitsubishiCN105Climate sut;
 
diff --git a/tests/components/mitsubishi_cn105/common.h b/tests/components/mitsubishi_cn105/common.h
index f542880eef..ee287d2548 100644
--- a/tests/components/mitsubishi_cn105/common.h
+++ b/tests/components/mitsubishi_cn105/common.h
@@ -73,6 +73,7 @@ class TestableMitsubishiCN105Climate : public MitsubishiCN105Climate {
   using MitsubishiCN105Climate::last_non_swing_wide_vane_mode_;
 
   MitsubishiCN105::Status &status() { return const_cast<MitsubishiCN105::Status &>(this->component_.status()); }
+  void set_use_fahrenheit(bool value) { this->component_.set_use_fahrenheit(value); }
 
  protected:
   MitsubishiCN105Component component_;
diff --git a/tests/components/mitsubishi_cn105/common.yaml b/tests/components/mitsubishi_cn105/common.yaml
index fc14724786..3f7e8c8f95 100644
--- a/tests/components/mitsubishi_cn105/common.yaml
+++ b/tests/components/mitsubishi_cn105/common.yaml
@@ -3,6 +3,7 @@ mitsubishi_cn105:
   uart_id: uart_bus
   update_interval: 30s
   telemetry_request_min_interval: 120s
+  use_fahrenheit: true
   vane:
     on_state:
       - logger.log:
diff --git a/tests/components/remote_transmitter/test.bk72xx-ard.yaml b/tests/components/remote_transmitter/test.bk72xx-ard.yaml
new file mode 100644
index 0000000000..2a5cceddec
--- /dev/null
+++ b/tests/components/remote_transmitter/test.bk72xx-ard.yaml
@@ -0,0 +1,7 @@
+remote_transmitter:
+  id: xmitr
+  pin: GPIO26
+  carrier_duty_percent: 50%
+
+packages:
+  buttons: !include common-buttons.yaml
diff --git a/tests/components/remote_transmitter/test.rtl87xx-ard.yaml b/tests/components/remote_transmitter/test.rtl87xx-ard.yaml
new file mode 100644
index 0000000000..769adbdf5c
--- /dev/null
+++ b/tests/components/remote_transmitter/test.rtl87xx-ard.yaml
@@ -0,0 +1,7 @@
+remote_transmitter:
+  id: xmitr
+  pin: GPIO12
+  carrier_duty_percent: 50%
+
+packages:
+  buttons: !include common-buttons.yaml
diff --git a/tests/components/runtime_image/__init__.py b/tests/components/runtime_image/__init__.py
new file mode 100644
index 0000000000..a8ff4bb68e
--- /dev/null
+++ b/tests/components/runtime_image/__init__.py
@@ -0,0 +1,15 @@
+from esphome.components.runtime_image import enable_format
+from esphome.types import ConfigType
+from tests.testing_helpers import ComponentManifestOverride
+
+
+def override_manifest(manifest: ComponentManifestOverride) -> None:
+    # to_code is suppressed in cpptest builds; formats are normally enabled by
+    # process_runtime_image_config(). Enable all formats so the format-switch
+    # tests have two decoder types and every retained decoder is under test.
+    async def to_code_testing(config: ConfigType) -> None:
+        enable_format("BMP")
+        enable_format("PNG")
+        enable_format("JPEG")
+
+    manifest.to_code = to_code_testing
diff --git a/tests/components/runtime_image/test_decoder_reuse.cpp b/tests/components/runtime_image/test_decoder_reuse.cpp
new file mode 100644
index 0000000000..87e77b00be
--- /dev/null
+++ b/tests/components/runtime_image/test_decoder_reuse.cpp
@@ -0,0 +1,336 @@
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+#include <algorithm>
+#include <array>
+#include <cstring>
+#include <vector>
+
+#include "esphome/components/runtime_image/image_decoder.h"
+#include "esphome/components/runtime_image/runtime_image.h"
+
+namespace esphome::runtime_image::testing {
+
+// 3x2 24bpp BMP, every pixel a unique color (rows padded to 4 bytes)
+static const uint8_t BMP_24BPP[] = {
+    0x42, 0x4D, 0x4E, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x36, 0x00, 0x00, 0x00, 0x28, 0x00,
+    0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x01, 0x00, 0x18, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0xC4, 0x0E, 0x00, 0x00, 0xC4, 0x0E, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x33, 0x22, 0x11, 0x77, 0x88, 0x99, 0xEF, 0xCD, 0xAB, 0x00,
+    0x00, 0x00, 0x20, 0x10, 0xE0, 0x40, 0xC0, 0x30, 0xA0, 0x60, 0x50, 0x00, 0x00, 0x00,
+};
+
+static const uint8_t BMP_24BPP_EXPECTED[2][3][3] = {
+    {{0xE0, 0x10, 0x20}, {0x30, 0xC0, 0x40}, {0x50, 0x60, 0xA0}},
+    {{0x11, 0x22, 0x33}, {0x99, 0x88, 0x77}, {0xAB, 0xCD, 0xEF}},
+};
+
+// 3x2 8bpp BMP with a 4-entry color table
+static const uint8_t BMP_8BPP[] = {
+    0x42, 0x4D, 0x4E, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x00, 0x00, 0x00, 0x28, 0x00,
+    0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x01, 0x00, 0x08, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x13, 0x0B, 0x00, 0x00, 0x13, 0x0B, 0x00, 0x00, 0x04, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x20, 0x10, 0x00, 0xD0, 0xE0, 0xF0, 0x00, 0x00, 0xFF,
+    0x00, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x03, 0x02, 0x01, 0x00, 0x00, 0x01, 0x02, 0x00,
+};
+
+static const uint8_t BMP_8BPP_EXPECTED[2][3][3] = {
+    {{0x10, 0x20, 0x30}, {0xF0, 0xE0, 0xD0}, {0x00, 0xFF, 0x00}},
+    {{0xFF, 0x00, 0xFF}, {0x00, 0xFF, 0x00}, {0xF0, 0xE0, 0xD0}},
+};
+
+// 3x2 8bpp BMP with an 8-entry color table, all colors distinct from BMP_8BPP's
+static const uint8_t BMP_8BPP_BIG[] = {
+    0x42, 0x4D, 0x5E, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x56, 0x00, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0x03,
+    0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x01, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00,
+    0x13, 0x0B, 0x00, 0x00, 0x13, 0x0B, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x28, 0x18, 0x08,
+    0x00, 0xA8, 0xB8, 0xC8, 0x00, 0xFF, 0x80, 0x00, 0x00, 0x00, 0xFF, 0x80, 0x00, 0x00, 0x80, 0xFF, 0x00, 0x55, 0x99,
+    0x11, 0x00, 0xCC, 0x00, 0x66, 0x00, 0x44, 0x22, 0xEE, 0x00, 0x01, 0x06, 0x04, 0x00, 0x07, 0x05, 0x03, 0x00,
+};
+
+static const uint8_t BMP_8BPP_BIG_EXPECTED[2][3][3] = {
+    {{0xEE, 0x22, 0x44}, {0x11, 0x99, 0x55}, {0x80, 0xFF, 0x00}},
+    {{0xC8, 0xB8, 0xA8}, {0x66, 0x00, 0xCC}, {0xFF, 0x80, 0x00}},
+};
+
+// 4x4 RGB PNG, every pixel a unique color
+static const uint8_t PNG_RGB[] = {
+    0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A, 0x00, 0x00, 0x00, 0x0D, 0x49, 0x48, 0x44, 0x52, 0x00, 0x00, 0x00,
+    0x04, 0x00, 0x00, 0x00, 0x04, 0x08, 0x02, 0x00, 0x00, 0x00, 0x26, 0x93, 0x09, 0x29, 0x00, 0x00, 0x00, 0x38, 0x49,
+    0x44, 0x41, 0x54, 0x78, 0x9C, 0x63, 0x60, 0x64, 0x62, 0x16, 0x50, 0x30, 0x58, 0xB0, 0xE1, 0xC0, 0xFF, 0xFF, 0x0C,
+    0x0C, 0x0E, 0x0C, 0x50, 0xEC, 0xE0, 0xE0, 0xC0, 0x50, 0xCF, 0xF0, 0x9F, 0xA1, 0xFE, 0xFF, 0xFF, 0x7A, 0x86, 0xFA,
+    0xFF, 0x0C, 0x0C, 0x42, 0x26, 0x61, 0xA9, 0xCE, 0x8A, 0xFF, 0xEE, 0xEC, 0x5A, 0x7D, 0xF6, 0x3D, 0x00, 0x81, 0xCB,
+    0x12, 0x4D, 0xB3, 0xFB, 0xD4, 0xE1, 0x00, 0x00, 0x00, 0x00, 0x49, 0x45, 0x4E, 0x44, 0xAE, 0x42, 0x60, 0x82,
+};
+
+static const uint8_t PNG_RGB_EXPECTED[4][4][3] = {
+    {{0x01, 0x02, 0x03}, {0x10, 0x20, 0x30}, {0xA0, 0xB0, 0xC0}, {0xFF, 0xFF, 0x00}},
+    {{0x40, 0x00, 0x00}, {0x00, 0x40, 0x00}, {0x00, 0x00, 0x40}, {0x40, 0x40, 0x40}},
+    {{0x7F, 0x00, 0xFF}, {0x00, 0x7F, 0xFF}, {0xFF, 0x7F, 0x00}, {0x7F, 0xFF, 0x00}},
+    {{0x12, 0x34, 0x56}, {0x65, 0x43, 0x21}, {0xFE, 0xDC, 0xBA}, {0xAB, 0xCD, 0xEF}},
+};
+
+/// Exposes the protected decoder machinery so reuse and eviction can be observed directly.
+class TestableRuntimeImage : public RuntimeImage {
+ public:
+  explicit TestableRuntimeImage(ImageFormat format)
+      : RuntimeImage(format, image::IMAGE_TYPE_RGB, image::TRANSPARENCY_OPAQUE, nullptr, false, 0, 0) {}
+
+  ImageDecoder *decoder() { return this->decoder_.get(); }
+
+  /// Simulates the state a dynamic-format producer (PR #16337) would leave behind:
+  /// a cached decoder whose format no longer matches the image's format.
+  /// TODO: once #16337 adds a public way to change the format, drive the mismatch
+  /// through it and delete this seam.
+  void plant_decoder(ImageFormat format) { this->decoder_ = this->create_decoder_(format); }
+};
+
+/// Runs one full decode session. Returns true when every stage succeeded.
+static bool decode_all(TestableRuntimeImage &img, const uint8_t *data, size_t len) {
+  std::vector<uint8_t> buffer(data, data + len);  // feed_data needs mutable bytes
+  if (!img.begin_decode(len)) {
+    return false;
+  }
+  size_t offset = 0;
+  while (offset < len) {
+    int consumed = img.feed_data(buffer.data() + offset, len - offset);
+    if (consumed <= 0) {
+      return false;  // decode error, or no progress despite full data
+    }
+    offset += consumed;
+  }
+  return img.end_decode();
+}
+
+/// Feeds the image the way online_image's download loop does: append a small
+/// chunk to a window, feed the window, drop what was consumed, repeat. A zero
+/// return mid-stream means "need more data" and grows the window.
+static bool decode_chunked(TestableRuntimeImage &img, const uint8_t *data, size_t len, size_t chunk_size) {
+  if (!img.begin_decode(len)) {
+    return false;
+  }
+  std::vector<uint8_t> window;
+  size_t supplied = 0;
+  while (supplied < len || !window.empty()) {
+    if (supplied < len) {
+      size_t take = std::min(chunk_size, len - supplied);
+      window.insert(window.end(), data + supplied, data + supplied + take);
+      supplied += take;
+    }
+    int consumed = img.feed_data(window.data(), window.size());
+    if (consumed < 0 || (consumed == 0 && supplied >= len)) {
+      return false;  // decode error, or stuck with all data supplied
+    }
+    window.erase(window.begin(), window.begin() + consumed);
+  }
+  return img.end_decode();
+}
+
+template<size_t H, size_t W> static void expect_pixels(TestableRuntimeImage &img, const uint8_t (&expected)[H][W][3]) {
+  ASSERT_EQ(img.get_width(), static_cast<int>(W));
+  ASSERT_EQ(img.get_height(), static_cast<int>(H));
+  for (size_t y = 0; y < H; y++) {
+    for (size_t x = 0; x < W; x++) {
+      SCOPED_TRACE(::testing::Message() << "pixel (" << x << "," << y << ")");
+      Color color = img.get_pixel(x, y);
+      EXPECT_THAT((std::array<uint8_t, 3>{color.r, color.g, color.b}), ::testing::ElementsAreArray(expected[y][x]));
+    }
+  }
+}
+
+TEST(RuntimeImageDecoder, DecoderStaysWarmAcrossDecodes) {
+  TestableRuntimeImage img(BMP);
+
+  ASSERT_TRUE(decode_all(img, BMP_24BPP, sizeof(BMP_24BPP)));
+  expect_pixels(img, BMP_24BPP_EXPECTED);
+  ImageDecoder *first = img.decoder();
+  ASSERT_NE(first, nullptr);
+
+  ASSERT_TRUE(decode_all(img, BMP_24BPP, sizeof(BMP_24BPP)));
+  expect_pixels(img, BMP_24BPP_EXPECTED);
+  EXPECT_EQ(img.decoder(), first) << "decoder must be reused, not reallocated";
+}
+
+TEST(RuntimeImageDecoder, SecondDecodeStartsClean) {
+  TestableRuntimeImage img(BMP);
+
+  // Palettized decode, then a 24bpp decode, then palettized again, all on the
+  // same decoder: each session must produce correct pixels for its own image.
+  ASSERT_TRUE(decode_all(img, BMP_8BPP, sizeof(BMP_8BPP)));
+  expect_pixels(img, BMP_8BPP_EXPECTED);
+  ImageDecoder *first = img.decoder();
+
+  ASSERT_TRUE(decode_all(img, BMP_24BPP, sizeof(BMP_24BPP)));
+  expect_pixels(img, BMP_24BPP_EXPECTED);
+  EXPECT_EQ(img.decoder(), first);
+
+  ASSERT_TRUE(decode_all(img, BMP_8BPP, sizeof(BMP_8BPP)));
+  expect_pixels(img, BMP_8BPP_EXPECTED);
+  EXPECT_EQ(img.decoder(), first);
+}
+
+TEST(RuntimeImageDecoder, ColorTableGrowsAndShrinksAcrossReuse) {
+  TestableRuntimeImage img(BMP);
+
+  // Small palette first: the retained table is allocated at 4 entries.
+  ASSERT_TRUE(decode_all(img, BMP_8BPP, sizeof(BMP_8BPP)));
+  expect_pixels(img, BMP_8BPP_EXPECTED);
+  ImageDecoder *first = img.decoder();
+
+  // Growing to 8 entries on the reused decoder must reallocate, not overflow.
+  ASSERT_TRUE(decode_all(img, BMP_8BPP_BIG, sizeof(BMP_8BPP_BIG)));
+  expect_pixels(img, BMP_8BPP_BIG_EXPECTED);
+  EXPECT_EQ(img.decoder(), first);
+
+  // Shrinking back must not surface stale colors from the larger table.
+  ASSERT_TRUE(decode_all(img, BMP_8BPP, sizeof(BMP_8BPP)));
+  expect_pixels(img, BMP_8BPP_EXPECTED);
+  EXPECT_EQ(img.decoder(), first);
+}
+
+TEST(RuntimeImageDecoder, ChunkedFeedDecodesLikeDownloadLoop) {
+  TestableRuntimeImage img(BMP);
+
+  ASSERT_TRUE(decode_chunked(img, BMP_24BPP, sizeof(BMP_24BPP), 16));
+  expect_pixels(img, BMP_24BPP_EXPECTED);
+  ImageDecoder *first = img.decoder();
+
+  // Chunked again on the warm decoder: the cross-call resume state
+  // (current_index_ / paint_index_) must have been fully reset.
+  ASSERT_TRUE(decode_chunked(img, BMP_24BPP, sizeof(BMP_24BPP), 16));
+  expect_pixels(img, BMP_24BPP_EXPECTED);
+  EXPECT_EQ(img.decoder(), first);
+}
+
+TEST(RuntimeImageDecoder, FormatSwitchEvictsMismatchedDecoder) {
+  // PNG image holding a stale BMP decoder: begin_decode must evict and recreate.
+  TestableRuntimeImage png_img(PNG);
+  png_img.plant_decoder(BMP);
+  ASSERT_NE(png_img.decoder(), nullptr);
+  ASSERT_EQ(png_img.decoder()->get_format(), BMP);
+
+  ASSERT_TRUE(decode_all(png_img, PNG_RGB, sizeof(PNG_RGB)));
+  EXPECT_EQ(png_img.decoder()->get_format(), PNG);
+  expect_pixels(png_img, PNG_RGB_EXPECTED);
+
+  // And the other direction: BMP image holding a stale PNG decoder.
+  TestableRuntimeImage bmp_img(BMP);
+  bmp_img.plant_decoder(PNG);
+  ASSERT_NE(bmp_img.decoder(), nullptr);
+  ASSERT_EQ(bmp_img.decoder()->get_format(), PNG);
+
+  ASSERT_TRUE(decode_all(bmp_img, BMP_24BPP, sizeof(BMP_24BPP)));
+  EXPECT_EQ(bmp_img.decoder()->get_format(), BMP);
+  expect_pixels(bmp_img, BMP_24BPP_EXPECTED);
+}
+
+TEST(RuntimeImageDecoder, ReleaseKeepsDecoderWarm) {
+  TestableRuntimeImage img(PNG);
+
+  ASSERT_TRUE(decode_all(img, PNG_RGB, sizeof(PNG_RGB)));
+  ImageDecoder *first = img.decoder();
+  ASSERT_NE(first, nullptr);
+
+  img.release();
+  EXPECT_EQ(img.decoder(), first) << "release() must keep the decoder for reuse";
+  EXPECT_FALSE(img.is_decoding());
+  EXPECT_EQ(img.get_width(), 0);
+  EXPECT_EQ(img.get_height(), 0);
+
+  ASSERT_TRUE(decode_all(img, PNG_RGB, sizeof(PNG_RGB)));
+  expect_pixels(img, PNG_RGB_EXPECTED);
+  EXPECT_EQ(img.decoder(), first);
+}
+
+TEST(RuntimeImageDecoder, FailedDecodeRecovers) {
+  TestableRuntimeImage img(BMP);
+
+  uint8_t garbage[32];
+  memset(garbage, 'X', sizeof(garbage));
+  ASSERT_TRUE(img.begin_decode(sizeof(garbage)));
+  EXPECT_LT(img.feed_data(garbage, sizeof(garbage)), 0) << "garbage must fail to decode";
+  img.release();
+
+  ASSERT_TRUE(decode_all(img, BMP_24BPP, sizeof(BMP_24BPP)));
+  expect_pixels(img, BMP_24BPP_EXPECTED);
+}
+
+#ifdef USE_RUNTIME_IMAGE_JPEG
+// 8x8 gradient JPEG (quality 90). JPEG is lossy, so the test asserts that a
+// reused decoder reproduces the exact same pixels, not absolute colors.
+static const uint8_t JPEG_GRADIENT[] = {
+    0xFF, 0xD8, 0xFF, 0xE0, 0x00, 0x10, 0x4A, 0x46, 0x49, 0x46, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00,
+    0x00, 0xFF, 0xDB, 0x00, 0x43, 0x00, 0x03, 0x02, 0x02, 0x03, 0x02, 0x02, 0x03, 0x03, 0x03, 0x03, 0x04, 0x03, 0x03,
+    0x04, 0x05, 0x08, 0x05, 0x05, 0x04, 0x04, 0x05, 0x0A, 0x07, 0x07, 0x06, 0x08, 0x0C, 0x0A, 0x0C, 0x0C, 0x0B, 0x0A,
+    0x0B, 0x0B, 0x0D, 0x0E, 0x12, 0x10, 0x0D, 0x0E, 0x11, 0x0E, 0x0B, 0x0B, 0x10, 0x16, 0x10, 0x11, 0x13, 0x14, 0x15,
+    0x15, 0x15, 0x0C, 0x0F, 0x17, 0x18, 0x16, 0x14, 0x18, 0x12, 0x14, 0x15, 0x14, 0xFF, 0xDB, 0x00, 0x43, 0x01, 0x03,
+    0x04, 0x04, 0x05, 0x04, 0x05, 0x09, 0x05, 0x05, 0x09, 0x14, 0x0D, 0x0B, 0x0D, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,
+    0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,
+    0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,
+    0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0xFF, 0xC0, 0x00, 0x11, 0x08, 0x00, 0x08, 0x00, 0x08, 0x03, 0x01, 0x22, 0x00,
+    0x02, 0x11, 0x01, 0x03, 0x11, 0x01, 0xFF, 0xC4, 0x00, 0x1F, 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01,
+    0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A,
+    0x0B, 0xFF, 0xC4, 0x00, 0xB5, 0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00,
+    0x00, 0x01, 0x7D, 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
+    0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1, 0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, 0x24, 0x33, 0x62,
+    0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37,
+    0x38, 0x39, 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A,
+    0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x83, 0x84, 0x85,
+    0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6,
+    0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
+    0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
+    0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFF, 0xC4, 0x00, 0x1F, 0x01, 0x00,
+    0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03,
+    0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0xFF, 0xC4, 0x00, 0xB5, 0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04,
+    0x03, 0x04, 0x07, 0x05, 0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31,
+    0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1, 0x09,
+    0x23, 0x33, 0x52, 0xF0, 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16, 0x24, 0x34, 0xE1, 0x25, 0xF1, 0x17, 0x18, 0x19, 0x1A,
+    0x26, 0x27, 0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A,
+    0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75,
+    0x76, 0x77, 0x78, 0x79, 0x7A, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96,
+    0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7,
+    0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8,
+    0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9,
+    0xFA, 0xFF, 0xDA, 0x00, 0x0C, 0x03, 0x01, 0x00, 0x02, 0x11, 0x03, 0x11, 0x00, 0x3F, 0x00, 0xE5, 0x3E, 0x0B, 0xFE,
+    0xC8, 0x7F, 0xEA, 0x3F, 0xD0, 0xBD, 0x3F, 0x86, 0x8A, 0x28, 0xAA, 0xC2, 0x62, 0x6A, 0xFB, 0x25, 0xA9, 0xD5, 0xC0,
+    0x7C, 0x6B, 0x9D, 0x7F, 0x62, 0xD3, 0xFD, 0xEF, 0xF5, 0xF7, 0x9F, 0xFF, 0xD9,
+};
+
+static std::vector<uint8_t> pixel_bytes(TestableRuntimeImage &img) {
+  const uint8_t *start = img.get_data_start();
+  return std::vector<uint8_t>(start, start + img.get_width_stride() * img.get_height());
+}
+
+TEST(RuntimeImageDecoder, JpegDecoderStaysWarmAcrossDecodes) {
+  TestableRuntimeImage img(JPEG);
+
+  ASSERT_TRUE(decode_all(img, JPEG_GRADIENT, sizeof(JPEG_GRADIENT)));
+  ASSERT_EQ(img.get_width(), 8);
+  ASSERT_EQ(img.get_height(), 8);
+  std::vector<uint8_t> first_pixels = pixel_bytes(img);
+  ImageDecoder *first = img.decoder();
+  ASSERT_NE(first, nullptr);
+
+  ASSERT_TRUE(decode_all(img, JPEG_GRADIENT, sizeof(JPEG_GRADIENT)));
+  EXPECT_EQ(img.decoder(), first);
+  EXPECT_EQ(pixel_bytes(img), first_pixels) << "reused decoder must reproduce identical pixels";
+}
+#endif  // USE_RUNTIME_IMAGE_JPEG
+
+TEST(RuntimeImageDecoder, SessionFlagsTrackLifecycle) {
+  TestableRuntimeImage img(BMP);
+  std::vector<uint8_t> buffer(BMP_24BPP, BMP_24BPP + sizeof(BMP_24BPP));
+
+  ASSERT_TRUE(img.begin_decode(buffer.size()));
+  EXPECT_TRUE(img.is_decoding());
+  EXPECT_FALSE(img.is_decode_finished());
+
+  ASSERT_EQ(img.feed_data(buffer.data(), buffer.size()), static_cast<int>(buffer.size()));
+  EXPECT_TRUE(img.is_decode_finished()) << "all pixel data consumed";
+
+  ASSERT_TRUE(img.end_decode());
+  EXPECT_FALSE(img.is_decoding()) << "end_decode() must close the session";
+  EXPECT_FALSE(img.is_decode_finished()) << "no session means nothing is 'finished'";
+}
+
+}  // namespace esphome::runtime_image::testing
diff --git a/tests/components/sendspin/common-action.yaml b/tests/components/sendspin/common-action.yaml
index 16f19ad7d1..1bba06ab46 100644
--- a/tests/components/sendspin/common-action.yaml
+++ b/tests/components/sendspin/common-action.yaml
@@ -1,6 +1,6 @@
 # `sendspin.switch` action enables the controller role, so we use a standalone test
 packages:
-  base: !include common.yaml
+  sendspin: !include common.yaml
 
 wifi:
   on_connect:
diff --git a/tests/components/sendspin/common-ethernet.yaml b/tests/components/sendspin/common-ethernet.yaml
new file mode 100644
index 0000000000..276163cda1
--- /dev/null
+++ b/tests/components/sendspin/common-ethernet.yaml
@@ -0,0 +1,5 @@
+packages:
+  sendspin_hub: !include common-hub.yaml
+
+ethernet:
+  type: OPENETH
diff --git a/tests/components/sendspin/common-hub.yaml b/tests/components/sendspin/common-hub.yaml
new file mode 100644
index 0000000000..7a6a9ffd4f
--- /dev/null
+++ b/tests/components/sendspin/common-hub.yaml
@@ -0,0 +1,6 @@
+psram:
+  mode: quad
+
+sendspin:
+  id: sendspin_hub_id
+  task_stack_in_psram: true
diff --git a/tests/components/sendspin/common-media_player.yaml b/tests/components/sendspin/common-media_player.yaml
index d3792cf470..afb8b992f3 100644
--- a/tests/components/sendspin/common-media_player.yaml
+++ b/tests/components/sendspin/common-media_player.yaml
@@ -1,4 +1,5 @@
-<<: !include common.yaml
+packages:
+  sendspin: !include common.yaml
 
 media_player:
   - platform: sendspin
diff --git a/tests/components/sendspin/common-media_source.yaml b/tests/components/sendspin/common-media_source.yaml
index 5b33a54647..1977b79c04 100644
--- a/tests/components/sendspin/common-media_source.yaml
+++ b/tests/components/sendspin/common-media_source.yaml
@@ -1,4 +1,5 @@
-<<: !include common.yaml
+packages:
+  sendspin: !include common.yaml
 
 media_source:
   - platform: sendspin
diff --git a/tests/components/sendspin/common-sensor.yaml b/tests/components/sendspin/common-sensor.yaml
index 6d9745cff9..6467e38b90 100644
--- a/tests/components/sendspin/common-sensor.yaml
+++ b/tests/components/sendspin/common-sensor.yaml
@@ -1,4 +1,5 @@
-<<: !include common.yaml
+packages:
+  sendspin: !include common.yaml
 
 sensor:
   - platform: sendspin
diff --git a/tests/components/sendspin/common-text_sensor.yaml b/tests/components/sendspin/common-text_sensor.yaml
index fc6a56a21a..23111e8d37 100644
--- a/tests/components/sendspin/common-text_sensor.yaml
+++ b/tests/components/sendspin/common-text_sensor.yaml
@@ -1,4 +1,5 @@
-<<: !include common.yaml
+packages:
+  sendspin: !include common.yaml
 
 text_sensor:
   - platform: sendspin
diff --git a/tests/components/sendspin/common.yaml b/tests/components/sendspin/common.yaml
index 9d7da76758..980635b4e3 100644
--- a/tests/components/sendspin/common.yaml
+++ b/tests/components/sendspin/common.yaml
@@ -1,9 +1,5 @@
+packages:
+  sendspin_hub: !include common-hub.yaml
+
 wifi:
   ap:
-
-psram:
-  mode: quad
-
-sendspin:
-  id: sendspin_hub_id
-  task_stack_in_psram: true
diff --git a/tests/components/sendspin/test-action.esp32-idf.yaml b/tests/components/sendspin/test-action.esp32-idf.yaml
index 70a7ee1bad..080eb59034 100644
--- a/tests/components/sendspin/test-action.esp32-idf.yaml
+++ b/tests/components/sendspin/test-action.esp32-idf.yaml
@@ -1 +1,2 @@
-<<: !include common-action.yaml
+packages:
+  sendspin: !include common-action.yaml
diff --git a/tests/components/sendspin/test-ethernet.esp32-idf.yaml b/tests/components/sendspin/test-ethernet.esp32-idf.yaml
index 069e397d99..09a951d211 100644
--- a/tests/components/sendspin/test-ethernet.esp32-idf.yaml
+++ b/tests/components/sendspin/test-ethernet.esp32-idf.yaml
@@ -1,9 +1,2 @@
-ethernet:
-  type: OPENETH
-
-psram:
-  mode: quad
-
-sendspin:
-  id: sendspin_hub_id
-  task_stack_in_psram: true
+packages:
+  sendspin: !include common-ethernet.yaml
diff --git a/tests/components/sendspin/test-media_player.esp32-idf.yaml b/tests/components/sendspin/test-media_player.esp32-idf.yaml
index cbbdb07c77..bcd4062bbe 100644
--- a/tests/components/sendspin/test-media_player.esp32-idf.yaml
+++ b/tests/components/sendspin/test-media_player.esp32-idf.yaml
@@ -1 +1,2 @@
-<<: !include common-media_player.yaml
+packages:
+  sendspin: !include common-media_player.yaml
diff --git a/tests/components/sendspin/test-media_source.esp32-idf.yaml b/tests/components/sendspin/test-media_source.esp32-idf.yaml
index 47aeb2257c..faadccb06d 100644
--- a/tests/components/sendspin/test-media_source.esp32-idf.yaml
+++ b/tests/components/sendspin/test-media_source.esp32-idf.yaml
@@ -1 +1,2 @@
-<<: !include common-media_source.yaml
+packages:
+  sendspin: !include common-media_source.yaml
diff --git a/tests/components/sendspin/test-sensor.esp32-idf.yaml b/tests/components/sendspin/test-sensor.esp32-idf.yaml
index f9127d47bc..1646902ca3 100644
--- a/tests/components/sendspin/test-sensor.esp32-idf.yaml
+++ b/tests/components/sendspin/test-sensor.esp32-idf.yaml
@@ -1 +1,2 @@
-<<: !include common-sensor.yaml
+packages:
+  sendspin: !include common-sensor.yaml
diff --git a/tests/components/sendspin/test-text_sensor.esp32-idf.yaml b/tests/components/sendspin/test-text_sensor.esp32-idf.yaml
index 8998b8896e..69cf8e63fb 100644
--- a/tests/components/sendspin/test-text_sensor.esp32-idf.yaml
+++ b/tests/components/sendspin/test-text_sensor.esp32-idf.yaml
@@ -1 +1,2 @@
-<<: !include common-text_sensor.yaml
+packages:
+  sendspin: !include common-text_sensor.yaml
diff --git a/tests/components/sendspin/test.esp32-idf.yaml b/tests/components/sendspin/test.esp32-idf.yaml
index dade44d145..36667f7fae 100644
--- a/tests/components/sendspin/test.esp32-idf.yaml
+++ b/tests/components/sendspin/test.esp32-idf.yaml
@@ -1 +1,2 @@
-<<: !include common.yaml
+packages:
+  sendspin: !include common.yaml