diff --git a/esphome/components/api/api.proto b/esphome/components/api/api.proto
index b0ce21b1ce..546c498ff3 100644
--- a/esphome/components/api/api.proto
+++ b/esphome/components/api/api.proto
@@ -230,14 +230,16 @@ message DeviceInfoResponse {
 
   uint32 webserver_port = 10 [(field_ifdef) = "USE_WEBSERVER"];
 
-  uint32 legacy_bluetooth_proxy_version = 11 [(field_ifdef) = "USE_BLUETOOTH_PROXY"];
+  // Deprecated in API version 1.9
+  uint32 legacy_bluetooth_proxy_version = 11 [deprecated=true, (field_ifdef) = "USE_BLUETOOTH_PROXY"];
   uint32 bluetooth_proxy_feature_flags = 15 [(field_ifdef) = "USE_BLUETOOTH_PROXY"];
 
   string manufacturer = 12;
 
   string friendly_name = 13;
 
-  uint32 legacy_voice_assistant_version = 14 [(field_ifdef) = "USE_VOICE_ASSISTANT"];
+  // Deprecated in API version 1.10
+  uint32 legacy_voice_assistant_version = 14 [deprecated=true, (field_ifdef) = "USE_VOICE_ASSISTANT"];
   uint32 voice_assistant_feature_flags = 17 [(field_ifdef) = "USE_VOICE_ASSISTANT"];
 
   string suggested_area = 16 [(field_ifdef) = "USE_AREAS"];
@@ -337,7 +339,9 @@ message ListEntitiesCoverResponse {
   uint32 device_id = 13 [(field_ifdef) = "USE_DEVICES"];
 }
 
+// Deprecated in API version 1.1
 enum LegacyCoverState {
+  option deprecated = true;
   LEGACY_COVER_STATE_OPEN = 0;
   LEGACY_COVER_STATE_CLOSED = 1;
 }
@@ -356,7 +360,8 @@ message CoverStateResponse {
   fixed32 key = 1;
   // legacy: state has been removed in 1.13
   // clients/servers must still send/accept it until the next protocol change
-  LegacyCoverState legacy_state = 2;
+  // Deprecated in API version 1.1
+  LegacyCoverState legacy_state = 2 [deprecated=true];
 
   float position = 3;
   float tilt = 4;
@@ -364,7 +369,9 @@ message CoverStateResponse {
   uint32 device_id = 6 [(field_ifdef) = "USE_DEVICES"];
 }
 
+// Deprecated in API version 1.1
 enum LegacyCoverCommand {
+  option deprecated = true;
   LEGACY_COVER_COMMAND_OPEN = 0;
   LEGACY_COVER_COMMAND_CLOSE = 1;
   LEGACY_COVER_COMMAND_STOP = 2;
@@ -380,8 +387,10 @@ message CoverCommandRequest {
 
   // legacy: command has been removed in 1.13
   // clients/servers must still send/accept it until the next protocol change
-  bool has_legacy_command = 2;
-  LegacyCoverCommand legacy_command = 3;
+  // Deprecated in API version 1.1
+  bool has_legacy_command = 2 [deprecated=true];
+  // Deprecated in API version 1.1
+  LegacyCoverCommand legacy_command = 3 [deprecated=true];
 
   bool has_position = 4;
   float position = 5;
@@ -413,7 +422,9 @@ message ListEntitiesFanResponse {
   repeated string supported_preset_modes = 12;
   uint32 device_id = 13 [(field_ifdef) = "USE_DEVICES"];
 }
+// Deprecated in API version 1.6 - only used in deprecated fields
 enum FanSpeed {
+  option deprecated = true;
   FAN_SPEED_LOW = 0;
   FAN_SPEED_MEDIUM = 1;
   FAN_SPEED_HIGH = 2;
@@ -432,7 +443,8 @@ message FanStateResponse {
   fixed32 key = 1;
   bool state = 2;
   bool oscillating = 3;
-  FanSpeed speed = 4 [deprecated = true];
+  // Deprecated in API version 1.6
+  FanSpeed speed = 4 [deprecated=true];
   FanDirection direction = 5;
   int32 speed_level = 6;
   string preset_mode = 7;
@@ -448,8 +460,10 @@ message FanCommandRequest {
   fixed32 key = 1;
   bool has_state = 2;
   bool state = 3;
-  bool has_speed = 4 [deprecated = true];
-  FanSpeed speed = 5 [deprecated = true];
+  // Deprecated in API version 1.6
+  bool has_speed = 4 [deprecated=true];
+  // Deprecated in API version 1.6
+  FanSpeed speed = 5 [deprecated=true];
   bool has_oscillating = 6;
   bool oscillating = 7;
   bool has_direction = 8;
@@ -488,9 +502,13 @@ message ListEntitiesLightResponse {
 
   repeated ColorMode supported_color_modes = 12;
   // next four supports_* are for legacy clients, newer clients should use color modes
+  // Deprecated in API version 1.6
   bool legacy_supports_brightness = 5 [deprecated=true];
+  // Deprecated in API version 1.6
   bool legacy_supports_rgb = 6 [deprecated=true];
+  // Deprecated in API version 1.6
   bool legacy_supports_white_value = 7 [deprecated=true];
+  // Deprecated in API version 1.6
   bool legacy_supports_color_temperature = 8 [deprecated=true];
   float min_mireds = 9;
   float max_mireds = 10;
@@ -567,7 +585,9 @@ enum SensorStateClass {
   STATE_CLASS_TOTAL = 3;
 }
 
+// Deprecated in API version 1.5
 enum SensorLastResetType {
+  option deprecated = true;
   LAST_RESET_NONE = 0;
   LAST_RESET_NEVER = 1;
   LAST_RESET_AUTO = 2;
@@ -591,7 +611,8 @@ message ListEntitiesSensorResponse {
   string device_class = 9;
   SensorStateClass state_class = 10;
   // Last reset type removed in 2021.9.0
-  SensorLastResetType legacy_last_reset_type = 11;
+  // Deprecated in API version 1.5
+  SensorLastResetType legacy_last_reset_type = 11 [deprecated=true];
   bool disabled_by_default = 12;
   EntityCategory entity_category = 13;
   uint32 device_id = 14 [(field_ifdef) = "USE_DEVICES"];
@@ -947,7 +968,8 @@ message ListEntitiesClimateResponse {
   float visual_target_temperature_step = 10;
   // for older peer versions - in new system this
   // is if CLIMATE_PRESET_AWAY exists is supported_presets
-  bool legacy_supports_away = 11;
+  // Deprecated in API version 1.5
+  bool legacy_supports_away = 11 [deprecated=true];
   bool supports_action = 12;
   repeated ClimateFanMode supported_fan_modes = 13;
   repeated ClimateSwingMode supported_swing_modes = 14;
@@ -978,7 +1000,8 @@ message ClimateStateResponse {
   float target_temperature_low = 5;
   float target_temperature_high = 6;
   // For older peers, equal to preset == CLIMATE_PRESET_AWAY
-  bool unused_legacy_away = 7;
+  // Deprecated in API version 1.5
+  bool unused_legacy_away = 7 [deprecated=true];
   ClimateAction action = 8;
   ClimateFanMode fan_mode = 9;
   ClimateSwingMode swing_mode = 10;
@@ -1006,8 +1029,10 @@ message ClimateCommandRequest {
   bool has_target_temperature_high = 8;
   float target_temperature_high = 9;
   // legacy, for older peers, newer ones should use CLIMATE_PRESET_AWAY in preset
-  bool unused_has_legacy_away = 10;
-  bool unused_legacy_away = 11;
+  // Deprecated in API version 1.5
+  bool unused_has_legacy_away = 10 [deprecated=true];
+  // Deprecated in API version 1.5
+  bool unused_legacy_away = 11 [deprecated=true];
   bool has_fan_mode = 12;
   ClimateFanMode fan_mode = 13;
   bool has_swing_mode = 14;
@@ -1354,12 +1379,17 @@ message SubscribeBluetoothLEAdvertisementsRequest {
   uint32 flags = 1;
 }
 
+// Deprecated - only used by deprecated BluetoothLEAdvertisementResponse
 message BluetoothServiceData {
+  option deprecated = true;
   string uuid = 1;
-  repeated uint32 legacy_data = 2 [deprecated = true];  // Removed in api version 1.7
+  // Deprecated in API version 1.7
+  repeated uint32 legacy_data = 2 [deprecated=true];  // Removed in api version 1.7
   bytes data = 3;  // Added in api version 1.7
 }
+// Removed in ESPHome 2025.8.0 - use BluetoothLERawAdvertisementsResponse instead
 message BluetoothLEAdvertisementResponse {
+  option deprecated = true;
   option (id) = 67;
   option (source) = SOURCE_SERVER;
   option (ifdef) = "USE_BLUETOOTH_PROXY";
diff --git a/esphome/components/api/api_connection.cpp b/esphome/components/api/api_connection.cpp
index 3f5262a985..24a0c910b9 100644
--- a/esphome/components/api/api_connection.cpp
+++ b/esphome/components/api/api_connection.cpp
@@ -362,8 +362,6 @@ uint16_t APIConnection::try_send_cover_state(EntityBase *entity, APIConnection *
   auto *cover = static_cast<cover::Cover *>(entity);
   CoverStateResponse msg;
   auto traits = cover->get_traits();
-  msg.legacy_state =
-      (cover->position == cover::COVER_OPEN) ? enums::LEGACY_COVER_STATE_OPEN : enums::LEGACY_COVER_STATE_CLOSED;
   msg.position = cover->position;
   if (traits.get_supports_tilt())
     msg.tilt = cover->tilt;
@@ -385,19 +383,6 @@ uint16_t APIConnection::try_send_cover_info(EntityBase *entity, APIConnection *c
 }
 void APIConnection::cover_command(const CoverCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(cover::Cover, cover, cover)
-  if (msg.has_legacy_command) {
-    switch (msg.legacy_command) {
-      case enums::LEGACY_COVER_COMMAND_OPEN:
-        call.set_command_open();
-        break;
-      case enums::LEGACY_COVER_COMMAND_CLOSE:
-        call.set_command_close();
-        break;
-      case enums::LEGACY_COVER_COMMAND_STOP:
-        call.set_command_stop();
-        break;
-    }
-  }
   if (msg.has_position)
     call.set_position(msg.position);
   if (msg.has_tilt)
@@ -495,14 +480,8 @@ uint16_t APIConnection::try_send_light_info(EntityBase *entity, APIConnection *c
   auto traits = light->get_traits();
   for (auto mode : traits.get_supported_color_modes())
     msg.supported_color_modes.push_back(static_cast<enums::ColorMode>(mode));
-  msg.legacy_supports_brightness = traits.supports_color_capability(light::ColorCapability::BRIGHTNESS);
-  msg.legacy_supports_rgb = traits.supports_color_capability(light::ColorCapability::RGB);
-  msg.legacy_supports_white_value =
-      msg.legacy_supports_rgb && (traits.supports_color_capability(light::ColorCapability::WHITE) ||
-                                  traits.supports_color_capability(light::ColorCapability::COLD_WARM_WHITE));
-  msg.legacy_supports_color_temperature = traits.supports_color_capability(light::ColorCapability::COLOR_TEMPERATURE) ||
-                                          traits.supports_color_capability(light::ColorCapability::COLD_WARM_WHITE);
-  if (msg.legacy_supports_color_temperature) {
+  if (traits.supports_color_capability(light::ColorCapability::COLOR_TEMPERATURE) ||
+      traits.supports_color_capability(light::ColorCapability::COLD_WARM_WHITE)) {
     msg.min_mireds = traits.get_min_mireds();
     msg.max_mireds = traits.get_max_mireds();
   }
@@ -692,7 +671,6 @@ uint16_t APIConnection::try_send_climate_info(EntityBase *entity, APIConnection
   msg.visual_current_temperature_step = traits.get_visual_current_temperature_step();
   msg.visual_min_humidity = traits.get_visual_min_humidity();
   msg.visual_max_humidity = traits.get_visual_max_humidity();
-  msg.legacy_supports_away = traits.supports_preset(climate::CLIMATE_PRESET_AWAY);
   msg.supports_action = traits.get_supports_action();
   for (auto fan_mode : traits.get_supported_fan_modes())
     msg.supported_fan_modes.push_back(static_cast<enums::ClimateFanMode>(fan_mode));
@@ -1113,21 +1091,6 @@ void APIConnection::subscribe_bluetooth_le_advertisements(const SubscribeBluetoo
 void APIConnection::unsubscribe_bluetooth_le_advertisements(const UnsubscribeBluetoothLEAdvertisementsRequest &msg) {
   bluetooth_proxy::global_bluetooth_proxy->unsubscribe_api_connection(this);
 }
-bool APIConnection::send_bluetooth_le_advertisement(const BluetoothLEAdvertisementResponse &msg) {
-  if (this->client_api_version_major_ < 1 || this->client_api_version_minor_ < 7) {
-    BluetoothLEAdvertisementResponse resp = msg;
-    for (auto &service : resp.service_data) {
-      service.legacy_data.assign(service.data.begin(), service.data.end());
-      service.data.clear();
-    }
-    for (auto &manufacturer_data : resp.manufacturer_data) {
-      manufacturer_data.legacy_data.assign(manufacturer_data.data.begin(), manufacturer_data.data.end());
-      manufacturer_data.data.clear();
-    }
-    return this->send_message(resp, BluetoothLEAdvertisementResponse::MESSAGE_TYPE);
-  }
-  return this->send_message(msg, BluetoothLEAdvertisementResponse::MESSAGE_TYPE);
-}
 void APIConnection::bluetooth_device_request(const BluetoothDeviceRequest &msg) {
   bluetooth_proxy::global_bluetooth_proxy->bluetooth_device_request(msg);
 }
@@ -1499,12 +1462,10 @@ DeviceInfoResponse APIConnection::device_info(const DeviceInfoRequest &msg) {
   resp.webserver_port = USE_WEBSERVER_PORT;
 #endif
 #ifdef USE_BLUETOOTH_PROXY
-  resp.legacy_bluetooth_proxy_version = bluetooth_proxy::global_bluetooth_proxy->get_legacy_version();
   resp.bluetooth_proxy_feature_flags = bluetooth_proxy::global_bluetooth_proxy->get_feature_flags();
   resp.bluetooth_mac_address = bluetooth_proxy::global_bluetooth_proxy->get_bluetooth_mac_address_pretty();
 #endif
 #ifdef USE_VOICE_ASSISTANT
-  resp.legacy_voice_assistant_version = voice_assistant::global_voice_assistant->get_legacy_version();
   resp.voice_assistant_feature_flags = voice_assistant::global_voice_assistant->get_feature_flags();
 #endif
 #ifdef USE_API_NOISE
diff --git a/esphome/components/api/api_connection.h b/esphome/components/api/api_connection.h
index cad9bac3d4..b0fd0f59b6 100644
--- a/esphome/components/api/api_connection.h
+++ b/esphome/components/api/api_connection.h
@@ -126,7 +126,6 @@ class APIConnection : public APIServerConnection {
 #ifdef USE_BLUETOOTH_PROXY
   void subscribe_bluetooth_le_advertisements(const SubscribeBluetoothLEAdvertisementsRequest &msg) override;
   void unsubscribe_bluetooth_le_advertisements(const UnsubscribeBluetoothLEAdvertisementsRequest &msg) override;
-  bool send_bluetooth_le_advertisement(const BluetoothLEAdvertisementResponse &msg);
 
   void bluetooth_device_request(const BluetoothDeviceRequest &msg) override;
   void bluetooth_gatt_read(const BluetoothGATTReadRequest &msg) override;
diff --git a/esphome/components/api/api_pb2.cpp b/esphome/components/api/api_pb2.cpp
index 437c9ece1d..c32a15760a 100644
--- a/esphome/components/api/api_pb2.cpp
+++ b/esphome/components/api/api_pb2.cpp
@@ -94,17 +94,11 @@ void DeviceInfoResponse::encode(ProtoWriteBuffer buffer) const {
 #ifdef USE_WEBSERVER
   buffer.encode_uint32(10, this->webserver_port);
 #endif
-#ifdef USE_BLUETOOTH_PROXY
-  buffer.encode_uint32(11, this->legacy_bluetooth_proxy_version);
-#endif
 #ifdef USE_BLUETOOTH_PROXY
   buffer.encode_uint32(15, this->bluetooth_proxy_feature_flags);
 #endif
   buffer.encode_string(12, this->manufacturer);
   buffer.encode_string(13, this->friendly_name);
-#ifdef USE_VOICE_ASSISTANT
-  buffer.encode_uint32(14, this->legacy_voice_assistant_version);
-#endif
 #ifdef USE_VOICE_ASSISTANT
   buffer.encode_uint32(17, this->voice_assistant_feature_flags);
 #endif
@@ -150,17 +144,11 @@ void DeviceInfoResponse::calculate_size(uint32_t &total_size) const {
 #ifdef USE_WEBSERVER
   ProtoSize::add_uint32_field(total_size, 1, this->webserver_port);
 #endif
-#ifdef USE_BLUETOOTH_PROXY
-  ProtoSize::add_uint32_field(total_size, 1, this->legacy_bluetooth_proxy_version);
-#endif
 #ifdef USE_BLUETOOTH_PROXY
   ProtoSize::add_uint32_field(total_size, 1, this->bluetooth_proxy_feature_flags);
 #endif
   ProtoSize::add_string_field(total_size, 1, this->manufacturer);
   ProtoSize::add_string_field(total_size, 1, this->friendly_name);
-#ifdef USE_VOICE_ASSISTANT
-  ProtoSize::add_uint32_field(total_size, 1, this->legacy_voice_assistant_version);
-#endif
 #ifdef USE_VOICE_ASSISTANT
   ProtoSize::add_uint32_field(total_size, 2, this->voice_assistant_feature_flags);
 #endif
@@ -270,7 +258,6 @@ void ListEntitiesCoverResponse::calculate_size(uint32_t &total_size) const {
 }
 void CoverStateResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_fixed32(1, this->key);
-  buffer.encode_uint32(2, static_cast<uint32_t>(this->legacy_state));
   buffer.encode_float(3, this->position);
   buffer.encode_float(4, this->tilt);
   buffer.encode_uint32(5, static_cast<uint32_t>(this->current_operation));
@@ -280,7 +267,6 @@ void CoverStateResponse::encode(ProtoWriteBuffer buffer) const {
 }
 void CoverStateResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_fixed32_field(total_size, 1, this->key);
-  ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->legacy_state));
   ProtoSize::add_float_field(total_size, 1, this->position);
   ProtoSize::add_float_field(total_size, 1, this->tilt);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->current_operation));
@@ -290,12 +276,6 @@ void CoverStateResponse::calculate_size(uint32_t &total_size) const {
 }
 bool CoverCommandRequest::decode_varint(uint32_t field_id, ProtoVarInt value) {
   switch (field_id) {
-    case 2:
-      this->has_legacy_command = value.as_bool();
-      break;
-    case 3:
-      this->legacy_command = static_cast<enums::LegacyCoverCommand>(value.as_uint32());
-      break;
     case 4:
       this->has_position = value.as_bool();
       break;
@@ -379,7 +359,6 @@ void FanStateResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_fixed32(1, this->key);
   buffer.encode_bool(2, this->state);
   buffer.encode_bool(3, this->oscillating);
-  buffer.encode_uint32(4, static_cast<uint32_t>(this->speed));
   buffer.encode_uint32(5, static_cast<uint32_t>(this->direction));
   buffer.encode_int32(6, this->speed_level);
   buffer.encode_string(7, this->preset_mode);
@@ -391,7 +370,6 @@ void FanStateResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_fixed32_field(total_size, 1, this->key);
   ProtoSize::add_bool_field(total_size, 1, this->state);
   ProtoSize::add_bool_field(total_size, 1, this->oscillating);
-  ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->speed));
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->direction));
   ProtoSize::add_int32_field(total_size, 1, this->speed_level);
   ProtoSize::add_string_field(total_size, 1, this->preset_mode);
@@ -407,12 +385,6 @@ bool FanCommandRequest::decode_varint(uint32_t field_id, ProtoVarInt value) {
     case 3:
       this->state = value.as_bool();
       break;
-    case 4:
-      this->has_speed = value.as_bool();
-      break;
-    case 5:
-      this->speed = static_cast<enums::FanSpeed>(value.as_uint32());
-      break;
     case 6:
       this->has_oscillating = value.as_bool();
       break;
@@ -473,10 +445,6 @@ void ListEntitiesLightResponse::encode(ProtoWriteBuffer buffer) const {
   for (auto &it : this->supported_color_modes) {
     buffer.encode_uint32(12, static_cast<uint32_t>(it), true);
   }
-  buffer.encode_bool(5, this->legacy_supports_brightness);
-  buffer.encode_bool(6, this->legacy_supports_rgb);
-  buffer.encode_bool(7, this->legacy_supports_white_value);
-  buffer.encode_bool(8, this->legacy_supports_color_temperature);
   buffer.encode_float(9, this->min_mireds);
   buffer.encode_float(10, this->max_mireds);
   for (auto &it : this->effects) {
@@ -500,10 +468,6 @@ void ListEntitiesLightResponse::calculate_size(uint32_t &total_size) const {
       ProtoSize::add_enum_field_repeated(total_size, 1, static_cast<uint32_t>(it));
     }
   }
-  ProtoSize::add_bool_field(total_size, 1, this->legacy_supports_brightness);
-  ProtoSize::add_bool_field(total_size, 1, this->legacy_supports_rgb);
-  ProtoSize::add_bool_field(total_size, 1, this->legacy_supports_white_value);
-  ProtoSize::add_bool_field(total_size, 1, this->legacy_supports_color_temperature);
   ProtoSize::add_float_field(total_size, 1, this->min_mireds);
   ProtoSize::add_float_field(total_size, 1, this->max_mireds);
   if (!this->effects.empty()) {
@@ -677,7 +641,6 @@ void ListEntitiesSensorResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_bool(8, this->force_update);
   buffer.encode_string(9, this->device_class);
   buffer.encode_uint32(10, static_cast<uint32_t>(this->state_class));
-  buffer.encode_uint32(11, static_cast<uint32_t>(this->legacy_last_reset_type));
   buffer.encode_bool(12, this->disabled_by_default);
   buffer.encode_uint32(13, static_cast<uint32_t>(this->entity_category));
 #ifdef USE_DEVICES
@@ -696,7 +659,6 @@ void ListEntitiesSensorResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_bool_field(total_size, 1, this->force_update);
   ProtoSize::add_string_field(total_size, 1, this->device_class);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->state_class));
-  ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->legacy_last_reset_type));
   ProtoSize::add_bool_field(total_size, 1, this->disabled_by_default);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->entity_category));
 #ifdef USE_DEVICES
@@ -1105,7 +1067,6 @@ void ListEntitiesClimateResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_float(8, this->visual_min_temperature);
   buffer.encode_float(9, this->visual_max_temperature);
   buffer.encode_float(10, this->visual_target_temperature_step);
-  buffer.encode_bool(11, this->legacy_supports_away);
   buffer.encode_bool(12, this->supports_action);
   for (auto &it : this->supported_fan_modes) {
     buffer.encode_uint32(13, static_cast<uint32_t>(it), true);
@@ -1150,7 +1111,6 @@ void ListEntitiesClimateResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_float_field(total_size, 1, this->visual_min_temperature);
   ProtoSize::add_float_field(total_size, 1, this->visual_max_temperature);
   ProtoSize::add_float_field(total_size, 1, this->visual_target_temperature_step);
-  ProtoSize::add_bool_field(total_size, 1, this->legacy_supports_away);
   ProtoSize::add_bool_field(total_size, 1, this->supports_action);
   if (!this->supported_fan_modes.empty()) {
     for (const auto &it : this->supported_fan_modes) {
@@ -1198,7 +1158,6 @@ void ClimateStateResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_float(4, this->target_temperature);
   buffer.encode_float(5, this->target_temperature_low);
   buffer.encode_float(6, this->target_temperature_high);
-  buffer.encode_bool(7, this->unused_legacy_away);
   buffer.encode_uint32(8, static_cast<uint32_t>(this->action));
   buffer.encode_uint32(9, static_cast<uint32_t>(this->fan_mode));
   buffer.encode_uint32(10, static_cast<uint32_t>(this->swing_mode));
@@ -1218,7 +1177,6 @@ void ClimateStateResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_float_field(total_size, 1, this->target_temperature);
   ProtoSize::add_float_field(total_size, 1, this->target_temperature_low);
   ProtoSize::add_float_field(total_size, 1, this->target_temperature_high);
-  ProtoSize::add_bool_field(total_size, 1, this->unused_legacy_away);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->action));
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->fan_mode));
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->swing_mode));
@@ -1248,12 +1206,6 @@ bool ClimateCommandRequest::decode_varint(uint32_t field_id, ProtoVarInt value)
     case 8:
       this->has_target_temperature_high = value.as_bool();
       break;
-    case 10:
-      this->unused_has_legacy_away = value.as_bool();
-      break;
-    case 11:
-      this->unused_legacy_away = value.as_bool();
-      break;
     case 12:
       this->has_fan_mode = value.as_bool();
       break;
@@ -1869,50 +1821,6 @@ bool SubscribeBluetoothLEAdvertisementsRequest::decode_varint(uint32_t field_id,
   }
   return true;
 }
-void BluetoothServiceData::encode(ProtoWriteBuffer buffer) const {
-  buffer.encode_string(1, this->uuid);
-  for (auto &it : this->legacy_data) {
-    buffer.encode_uint32(2, it, true);
-  }
-  buffer.encode_bytes(3, reinterpret_cast<const uint8_t *>(this->data.data()), this->data.size());
-}
-void BluetoothServiceData::calculate_size(uint32_t &total_size) const {
-  ProtoSize::add_string_field(total_size, 1, this->uuid);
-  if (!this->legacy_data.empty()) {
-    for (const auto &it : this->legacy_data) {
-      ProtoSize::add_uint32_field_repeated(total_size, 1, it);
-    }
-  }
-  ProtoSize::add_string_field(total_size, 1, this->data);
-}
-void BluetoothLEAdvertisementResponse::encode(ProtoWriteBuffer buffer) const {
-  buffer.encode_uint64(1, this->address);
-  buffer.encode_bytes(2, reinterpret_cast<const uint8_t *>(this->name.data()), this->name.size());
-  buffer.encode_sint32(3, this->rssi);
-  for (auto &it : this->service_uuids) {
-    buffer.encode_string(4, it, true);
-  }
-  for (auto &it : this->service_data) {
-    buffer.encode_message(5, it, true);
-  }
-  for (auto &it : this->manufacturer_data) {
-    buffer.encode_message(6, it, true);
-  }
-  buffer.encode_uint32(7, this->address_type);
-}
-void BluetoothLEAdvertisementResponse::calculate_size(uint32_t &total_size) const {
-  ProtoSize::add_uint64_field(total_size, 1, this->address);
-  ProtoSize::add_string_field(total_size, 1, this->name);
-  ProtoSize::add_sint32_field(total_size, 1, this->rssi);
-  if (!this->service_uuids.empty()) {
-    for (const auto &it : this->service_uuids) {
-      ProtoSize::add_string_field_repeated(total_size, 1, it);
-    }
-  }
-  ProtoSize::add_repeated_message(total_size, 1, this->service_data);
-  ProtoSize::add_repeated_message(total_size, 1, this->manufacturer_data);
-  ProtoSize::add_uint32_field(total_size, 1, this->address_type);
-}
 void BluetoothLERawAdvertisement::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_uint64(1, this->address);
   buffer.encode_sint32(2, this->rssi);
diff --git a/esphome/components/api/api_pb2.h b/esphome/components/api/api_pb2.h
index 95db58aae9..bb31c51278 100644
--- a/esphome/components/api/api_pb2.h
+++ b/esphome/components/api/api_pb2.h
@@ -17,27 +17,13 @@ enum EntityCategory : uint32_t {
   ENTITY_CATEGORY_DIAGNOSTIC = 2,
 };
 #ifdef USE_COVER
-enum LegacyCoverState : uint32_t {
-  LEGACY_COVER_STATE_OPEN = 0,
-  LEGACY_COVER_STATE_CLOSED = 1,
-};
 enum CoverOperation : uint32_t {
   COVER_OPERATION_IDLE = 0,
   COVER_OPERATION_IS_OPENING = 1,
   COVER_OPERATION_IS_CLOSING = 2,
 };
-enum LegacyCoverCommand : uint32_t {
-  LEGACY_COVER_COMMAND_OPEN = 0,
-  LEGACY_COVER_COMMAND_CLOSE = 1,
-  LEGACY_COVER_COMMAND_STOP = 2,
-};
 #endif
 #ifdef USE_FAN
-enum FanSpeed : uint32_t {
-  FAN_SPEED_LOW = 0,
-  FAN_SPEED_MEDIUM = 1,
-  FAN_SPEED_HIGH = 2,
-};
 enum FanDirection : uint32_t {
   FAN_DIRECTION_FORWARD = 0,
   FAN_DIRECTION_REVERSE = 1,
@@ -65,11 +51,6 @@ enum SensorStateClass : uint32_t {
   STATE_CLASS_TOTAL_INCREASING = 2,
   STATE_CLASS_TOTAL = 3,
 };
-enum SensorLastResetType : uint32_t {
-  LAST_RESET_NONE = 0,
-  LAST_RESET_NEVER = 1,
-  LAST_RESET_AUTO = 2,
-};
 #endif
 enum LogLevel : uint32_t {
   LOG_LEVEL_NONE = 0,
@@ -485,7 +466,7 @@ class DeviceInfo : public ProtoMessage {
 class DeviceInfoResponse : public ProtoMessage {
  public:
   static constexpr uint8_t MESSAGE_TYPE = 10;
-  static constexpr uint8_t ESTIMATED_SIZE = 219;
+  static constexpr uint8_t ESTIMATED_SIZE = 211;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   const char *message_name() const override { return "device_info_response"; }
 #endif
@@ -507,17 +488,11 @@ class DeviceInfoResponse : public ProtoMessage {
 #ifdef USE_WEBSERVER
   uint32_t webserver_port{0};
 #endif
-#ifdef USE_BLUETOOTH_PROXY
-  uint32_t legacy_bluetooth_proxy_version{0};
-#endif
 #ifdef USE_BLUETOOTH_PROXY
   uint32_t bluetooth_proxy_feature_flags{0};
 #endif
   std::string manufacturer{};
   std::string friendly_name{};
-#ifdef USE_VOICE_ASSISTANT
-  uint32_t legacy_voice_assistant_version{0};
-#endif
 #ifdef USE_VOICE_ASSISTANT
   uint32_t voice_assistant_feature_flags{0};
 #endif
@@ -646,11 +621,10 @@ class ListEntitiesCoverResponse : public InfoResponseProtoMessage {
 class CoverStateResponse : public StateResponseProtoMessage {
  public:
   static constexpr uint8_t MESSAGE_TYPE = 22;
-  static constexpr uint8_t ESTIMATED_SIZE = 23;
+  static constexpr uint8_t ESTIMATED_SIZE = 21;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   const char *message_name() const override { return "cover_state_response"; }
 #endif
-  enums::LegacyCoverState legacy_state{};
   float position{0.0f};
   float tilt{0.0f};
   enums::CoverOperation current_operation{};
@@ -665,12 +639,10 @@ class CoverStateResponse : public StateResponseProtoMessage {
 class CoverCommandRequest : public CommandProtoMessage {
  public:
   static constexpr uint8_t MESSAGE_TYPE = 30;
-  static constexpr uint8_t ESTIMATED_SIZE = 29;
+  static constexpr uint8_t ESTIMATED_SIZE = 25;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   const char *message_name() const override { return "cover_command_request"; }
 #endif
-  bool has_legacy_command{false};
-  enums::LegacyCoverCommand legacy_command{};
   bool has_position{false};
   float position{0.0f};
   bool has_tilt{false};
@@ -709,13 +681,12 @@ class ListEntitiesFanResponse : public InfoResponseProtoMessage {
 class FanStateResponse : public StateResponseProtoMessage {
  public:
   static constexpr uint8_t MESSAGE_TYPE = 23;
-  static constexpr uint8_t ESTIMATED_SIZE = 30;
+  static constexpr uint8_t ESTIMATED_SIZE = 28;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   const char *message_name() const override { return "fan_state_response"; }
 #endif
   bool state{false};
   bool oscillating{false};
-  enums::FanSpeed speed{};
   enums::FanDirection direction{};
   int32_t speed_level{0};
   std::string preset_mode{};
@@ -730,14 +701,12 @@ class FanStateResponse : public StateResponseProtoMessage {
 class FanCommandRequest : public CommandProtoMessage {
  public:
   static constexpr uint8_t MESSAGE_TYPE = 31;
-  static constexpr uint8_t ESTIMATED_SIZE = 42;
+  static constexpr uint8_t ESTIMATED_SIZE = 38;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   const char *message_name() const override { return "fan_command_request"; }
 #endif
   bool has_state{false};
   bool state{false};
-  bool has_speed{false};
-  enums::FanSpeed speed{};
   bool has_oscillating{false};
   bool oscillating{false};
   bool has_direction{false};
@@ -760,15 +729,11 @@ class FanCommandRequest : public CommandProtoMessage {
 class ListEntitiesLightResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint8_t MESSAGE_TYPE = 15;
-  static constexpr uint8_t ESTIMATED_SIZE = 81;
+  static constexpr uint8_t ESTIMATED_SIZE = 73;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   const char *message_name() const override { return "list_entities_light_response"; }
 #endif
   std::vector<enums::ColorMode> supported_color_modes{};
-  bool legacy_supports_brightness{false};
-  bool legacy_supports_rgb{false};
-  bool legacy_supports_white_value{false};
-  bool legacy_supports_color_temperature{false};
   float min_mireds{0.0f};
   float max_mireds{0.0f};
   std::vector<std::string> effects{};
@@ -854,7 +819,7 @@ class LightCommandRequest : public CommandProtoMessage {
 class ListEntitiesSensorResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint8_t MESSAGE_TYPE = 16;
-  static constexpr uint8_t ESTIMATED_SIZE = 68;
+  static constexpr uint8_t ESTIMATED_SIZE = 66;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   const char *message_name() const override { return "list_entities_sensor_response"; }
 #endif
@@ -863,7 +828,6 @@ class ListEntitiesSensorResponse : public InfoResponseProtoMessage {
   bool force_update{false};
   std::string device_class{};
   enums::SensorStateClass state_class{};
-  enums::SensorLastResetType legacy_last_reset_type{};
   void encode(ProtoWriteBuffer buffer) const override;
   void calculate_size(uint32_t &total_size) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -1289,7 +1253,7 @@ class CameraImageRequest : public ProtoDecodableMessage {
 class ListEntitiesClimateResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint8_t MESSAGE_TYPE = 46;
-  static constexpr uint8_t ESTIMATED_SIZE = 147;
+  static constexpr uint8_t ESTIMATED_SIZE = 145;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   const char *message_name() const override { return "list_entities_climate_response"; }
 #endif
@@ -1299,7 +1263,6 @@ class ListEntitiesClimateResponse : public InfoResponseProtoMessage {
   float visual_min_temperature{0.0f};
   float visual_max_temperature{0.0f};
   float visual_target_temperature_step{0.0f};
-  bool legacy_supports_away{false};
   bool supports_action{false};
   std::vector<enums::ClimateFanMode> supported_fan_modes{};
   std::vector<enums::ClimateSwingMode> supported_swing_modes{};
@@ -1322,7 +1285,7 @@ class ListEntitiesClimateResponse : public InfoResponseProtoMessage {
 class ClimateStateResponse : public StateResponseProtoMessage {
  public:
   static constexpr uint8_t MESSAGE_TYPE = 47;
-  static constexpr uint8_t ESTIMATED_SIZE = 70;
+  static constexpr uint8_t ESTIMATED_SIZE = 68;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   const char *message_name() const override { return "climate_state_response"; }
 #endif
@@ -1331,7 +1294,6 @@ class ClimateStateResponse : public StateResponseProtoMessage {
   float target_temperature{0.0f};
   float target_temperature_low{0.0f};
   float target_temperature_high{0.0f};
-  bool unused_legacy_away{false};
   enums::ClimateAction action{};
   enums::ClimateFanMode fan_mode{};
   enums::ClimateSwingMode swing_mode{};
@@ -1351,7 +1313,7 @@ class ClimateStateResponse : public StateResponseProtoMessage {
 class ClimateCommandRequest : public CommandProtoMessage {
  public:
   static constexpr uint8_t MESSAGE_TYPE = 48;
-  static constexpr uint8_t ESTIMATED_SIZE = 88;
+  static constexpr uint8_t ESTIMATED_SIZE = 84;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   const char *message_name() const override { return "climate_command_request"; }
 #endif
@@ -1363,8 +1325,6 @@ class ClimateCommandRequest : public CommandProtoMessage {
   float target_temperature_low{0.0f};
   bool has_target_temperature_high{false};
   float target_temperature_high{0.0f};
-  bool unused_has_legacy_away{false};
-  bool unused_legacy_away{false};
   bool has_fan_mode{false};
   enums::ClimateFanMode fan_mode{};
   bool has_swing_mode{false};
@@ -1736,41 +1696,6 @@ class SubscribeBluetoothLEAdvertisementsRequest : public ProtoDecodableMessage {
  protected:
   bool decode_varint(uint32_t field_id, ProtoVarInt value) override;
 };
-class BluetoothServiceData : public ProtoMessage {
- public:
-  std::string uuid{};
-  std::vector<uint32_t> legacy_data{};
-  std::string data{};
-  void encode(ProtoWriteBuffer buffer) const override;
-  void calculate_size(uint32_t &total_size) const override;
-#ifdef HAS_PROTO_MESSAGE_DUMP
-  void dump_to(std::string &out) const override;
-#endif
-
- protected:
-};
-class BluetoothLEAdvertisementResponse : public ProtoMessage {
- public:
-  static constexpr uint8_t MESSAGE_TYPE = 67;
-  static constexpr uint8_t ESTIMATED_SIZE = 107;
-#ifdef HAS_PROTO_MESSAGE_DUMP
-  const char *message_name() const override { return "bluetooth_le_advertisement_response"; }
-#endif
-  uint64_t address{0};
-  std::string name{};
-  int32_t rssi{0};
-  std::vector<std::string> service_uuids{};
-  std::vector<BluetoothServiceData> service_data{};
-  std::vector<BluetoothServiceData> manufacturer_data{};
-  uint32_t address_type{0};
-  void encode(ProtoWriteBuffer buffer) const override;
-  void calculate_size(uint32_t &total_size) const override;
-#ifdef HAS_PROTO_MESSAGE_DUMP
-  void dump_to(std::string &out) const override;
-#endif
-
- protected:
-};
 class BluetoothLERawAdvertisement : public ProtoMessage {
  public:
   uint64_t address{0};
diff --git a/esphome/components/api/api_pb2_dump.cpp b/esphome/components/api/api_pb2_dump.cpp
index ad5a5fdcaa..b4da15da0d 100644
--- a/esphome/components/api/api_pb2_dump.cpp
+++ b/esphome/components/api/api_pb2_dump.cpp
@@ -23,16 +23,6 @@ template<> const char *proto_enum_to_string<enums::EntityCategory>(enums::Entity
   }
 }
 #ifdef USE_COVER
-template<> const char *proto_enum_to_string<enums::LegacyCoverState>(enums::LegacyCoverState value) {
-  switch (value) {
-    case enums::LEGACY_COVER_STATE_OPEN:
-      return "LEGACY_COVER_STATE_OPEN";
-    case enums::LEGACY_COVER_STATE_CLOSED:
-      return "LEGACY_COVER_STATE_CLOSED";
-    default:
-      return "UNKNOWN";
-  }
-}
 template<> const char *proto_enum_to_string<enums::CoverOperation>(enums::CoverOperation value) {
   switch (value) {
     case enums::COVER_OPERATION_IDLE:
@@ -45,32 +35,8 @@ template<> const char *proto_enum_to_string<enums::CoverOperation>(enums::CoverO
       return "UNKNOWN";
   }
 }
-template<> const char *proto_enum_to_string<enums::LegacyCoverCommand>(enums::LegacyCoverCommand value) {
-  switch (value) {
-    case enums::LEGACY_COVER_COMMAND_OPEN:
-      return "LEGACY_COVER_COMMAND_OPEN";
-    case enums::LEGACY_COVER_COMMAND_CLOSE:
-      return "LEGACY_COVER_COMMAND_CLOSE";
-    case enums::LEGACY_COVER_COMMAND_STOP:
-      return "LEGACY_COVER_COMMAND_STOP";
-    default:
-      return "UNKNOWN";
-  }
-}
 #endif
 #ifdef USE_FAN
-template<> const char *proto_enum_to_string<enums::FanSpeed>(enums::FanSpeed value) {
-  switch (value) {
-    case enums::FAN_SPEED_LOW:
-      return "FAN_SPEED_LOW";
-    case enums::FAN_SPEED_MEDIUM:
-      return "FAN_SPEED_MEDIUM";
-    case enums::FAN_SPEED_HIGH:
-      return "FAN_SPEED_HIGH";
-    default:
-      return "UNKNOWN";
-  }
-}
 template<> const char *proto_enum_to_string<enums::FanDirection>(enums::FanDirection value) {
   switch (value) {
     case enums::FAN_DIRECTION_FORWARD:
@@ -127,18 +93,6 @@ template<> const char *proto_enum_to_string<enums::SensorStateClass>(enums::Sens
       return "UNKNOWN";
   }
 }
-template<> const char *proto_enum_to_string<enums::SensorLastResetType>(enums::SensorLastResetType value) {
-  switch (value) {
-    case enums::LAST_RESET_NONE:
-      return "LAST_RESET_NONE";
-    case enums::LAST_RESET_NEVER:
-      return "LAST_RESET_NEVER";
-    case enums::LAST_RESET_AUTO:
-      return "LAST_RESET_AUTO";
-    default:
-      return "UNKNOWN";
-  }
-}
 #endif
 template<> const char *proto_enum_to_string<enums::LogLevel>(enums::LogLevel value) {
   switch (value) {
@@ -737,13 +691,6 @@ void DeviceInfoResponse::dump_to(std::string &out) const {
   out.append(buffer);
   out.append("\n");
 
-#endif
-#ifdef USE_BLUETOOTH_PROXY
-  out.append("  legacy_bluetooth_proxy_version: ");
-  snprintf(buffer, sizeof(buffer), "%" PRIu32, this->legacy_bluetooth_proxy_version);
-  out.append(buffer);
-  out.append("\n");
-
 #endif
 #ifdef USE_BLUETOOTH_PROXY
   out.append("  bluetooth_proxy_feature_flags: ");
@@ -760,13 +707,6 @@ void DeviceInfoResponse::dump_to(std::string &out) const {
   out.append("'").append(this->friendly_name).append("'");
   out.append("\n");
 
-#ifdef USE_VOICE_ASSISTANT
-  out.append("  legacy_voice_assistant_version: ");
-  snprintf(buffer, sizeof(buffer), "%" PRIu32, this->legacy_voice_assistant_version);
-  out.append(buffer);
-  out.append("\n");
-
-#endif
 #ifdef USE_VOICE_ASSISTANT
   out.append("  voice_assistant_feature_flags: ");
   snprintf(buffer, sizeof(buffer), "%" PRIu32, this->voice_assistant_feature_flags);
@@ -961,10 +901,6 @@ void CoverStateResponse::dump_to(std::string &out) const {
   out.append(buffer);
   out.append("\n");
 
-  out.append("  legacy_state: ");
-  out.append(proto_enum_to_string<enums::LegacyCoverState>(this->legacy_state));
-  out.append("\n");
-
   out.append("  position: ");
   snprintf(buffer, sizeof(buffer), "%g", this->position);
   out.append(buffer);
@@ -996,14 +932,6 @@ void CoverCommandRequest::dump_to(std::string &out) const {
   out.append(buffer);
   out.append("\n");
 
-  out.append("  has_legacy_command: ");
-  out.append(YESNO(this->has_legacy_command));
-  out.append("\n");
-
-  out.append("  legacy_command: ");
-  out.append(proto_enum_to_string<enums::LegacyCoverCommand>(this->legacy_command));
-  out.append("\n");
-
   out.append("  has_position: ");
   out.append(YESNO(this->has_position));
   out.append("\n");
@@ -1115,10 +1043,6 @@ void FanStateResponse::dump_to(std::string &out) const {
   out.append(YESNO(this->oscillating));
   out.append("\n");
 
-  out.append("  speed: ");
-  out.append(proto_enum_to_string<enums::FanSpeed>(this->speed));
-  out.append("\n");
-
   out.append("  direction: ");
   out.append(proto_enum_to_string<enums::FanDirection>(this->direction));
   out.append("\n");
@@ -1157,14 +1081,6 @@ void FanCommandRequest::dump_to(std::string &out) const {
   out.append(YESNO(this->state));
   out.append("\n");
 
-  out.append("  has_speed: ");
-  out.append(YESNO(this->has_speed));
-  out.append("\n");
-
-  out.append("  speed: ");
-  out.append(proto_enum_to_string<enums::FanSpeed>(this->speed));
-  out.append("\n");
-
   out.append("  has_oscillating: ");
   out.append(YESNO(this->has_oscillating));
   out.append("\n");
@@ -1231,22 +1147,6 @@ void ListEntitiesLightResponse::dump_to(std::string &out) const {
     out.append("\n");
   }
 
-  out.append("  legacy_supports_brightness: ");
-  out.append(YESNO(this->legacy_supports_brightness));
-  out.append("\n");
-
-  out.append("  legacy_supports_rgb: ");
-  out.append(YESNO(this->legacy_supports_rgb));
-  out.append("\n");
-
-  out.append("  legacy_supports_white_value: ");
-  out.append(YESNO(this->legacy_supports_white_value));
-  out.append("\n");
-
-  out.append("  legacy_supports_color_temperature: ");
-  out.append(YESNO(this->legacy_supports_color_temperature));
-  out.append("\n");
-
   out.append("  min_mireds: ");
   snprintf(buffer, sizeof(buffer), "%g", this->min_mireds);
   out.append(buffer);
@@ -1537,10 +1437,6 @@ void ListEntitiesSensorResponse::dump_to(std::string &out) const {
   out.append(proto_enum_to_string<enums::SensorStateClass>(this->state_class));
   out.append("\n");
 
-  out.append("  legacy_last_reset_type: ");
-  out.append(proto_enum_to_string<enums::SensorLastResetType>(this->legacy_last_reset_type));
-  out.append("\n");
-
   out.append("  disabled_by_default: ");
   out.append(YESNO(this->disabled_by_default));
   out.append("\n");
@@ -2107,10 +2003,6 @@ void ListEntitiesClimateResponse::dump_to(std::string &out) const {
   out.append(buffer);
   out.append("\n");
 
-  out.append("  legacy_supports_away: ");
-  out.append(YESNO(this->legacy_supports_away));
-  out.append("\n");
-
   out.append("  supports_action: ");
   out.append(YESNO(this->supports_action));
   out.append("\n");
@@ -2223,10 +2115,6 @@ void ClimateStateResponse::dump_to(std::string &out) const {
   out.append(buffer);
   out.append("\n");
 
-  out.append("  unused_legacy_away: ");
-  out.append(YESNO(this->unused_legacy_away));
-  out.append("\n");
-
   out.append("  action: ");
   out.append(proto_enum_to_string<enums::ClimateAction>(this->action));
   out.append("\n");
@@ -2313,14 +2201,6 @@ void ClimateCommandRequest::dump_to(std::string &out) const {
   out.append(buffer);
   out.append("\n");
 
-  out.append("  unused_has_legacy_away: ");
-  out.append(YESNO(this->unused_has_legacy_away));
-  out.append("\n");
-
-  out.append("  unused_legacy_away: ");
-  out.append(YESNO(this->unused_legacy_away));
-  out.append("\n");
-
   out.append("  has_fan_mode: ");
   out.append(YESNO(this->has_fan_mode));
   out.append("\n");
@@ -3053,66 +2933,6 @@ void SubscribeBluetoothLEAdvertisementsRequest::dump_to(std::string &out) const
   out.append("\n");
   out.append("}");
 }
-void BluetoothServiceData::dump_to(std::string &out) const {
-  __attribute__((unused)) char buffer[64];
-  out.append("BluetoothServiceData {\n");
-  out.append("  uuid: ");
-  out.append("'").append(this->uuid).append("'");
-  out.append("\n");
-
-  for (const auto &it : this->legacy_data) {
-    out.append("  legacy_data: ");
-    snprintf(buffer, sizeof(buffer), "%" PRIu32, it);
-    out.append(buffer);
-    out.append("\n");
-  }
-
-  out.append("  data: ");
-  out.append(format_hex_pretty(this->data));
-  out.append("\n");
-  out.append("}");
-}
-void BluetoothLEAdvertisementResponse::dump_to(std::string &out) const {
-  __attribute__((unused)) char buffer[64];
-  out.append("BluetoothLEAdvertisementResponse {\n");
-  out.append("  address: ");
-  snprintf(buffer, sizeof(buffer), "%llu", this->address);
-  out.append(buffer);
-  out.append("\n");
-
-  out.append("  name: ");
-  out.append(format_hex_pretty(this->name));
-  out.append("\n");
-
-  out.append("  rssi: ");
-  snprintf(buffer, sizeof(buffer), "%" PRId32, this->rssi);
-  out.append(buffer);
-  out.append("\n");
-
-  for (const auto &it : this->service_uuids) {
-    out.append("  service_uuids: ");
-    out.append("'").append(it).append("'");
-    out.append("\n");
-  }
-
-  for (const auto &it : this->service_data) {
-    out.append("  service_data: ");
-    it.dump_to(out);
-    out.append("\n");
-  }
-
-  for (const auto &it : this->manufacturer_data) {
-    out.append("  manufacturer_data: ");
-    it.dump_to(out);
-    out.append("\n");
-  }
-
-  out.append("  address_type: ");
-  snprintf(buffer, sizeof(buffer), "%" PRIu32, this->address_type);
-  out.append(buffer);
-  out.append("\n");
-  out.append("}");
-}
 void BluetoothLERawAdvertisement::dump_to(std::string &out) const {
   __attribute__((unused)) char buffer[64];
   out.append("BluetoothLERawAdvertisement {\n");
diff --git a/esphome/components/bluetooth_proxy/bluetooth_proxy.cpp b/esphome/components/bluetooth_proxy/bluetooth_proxy.cpp
index f4b63f3a5d..8a1a2bff6a 100644
--- a/esphome/components/bluetooth_proxy/bluetooth_proxy.cpp
+++ b/esphome/components/bluetooth_proxy/bluetooth_proxy.cpp
@@ -127,46 +127,6 @@ void BluetoothProxy::flush_pending_advertisements() {
   this->advertisement_count_ = 0;
 }
 
-#ifdef USE_ESP32_BLE_DEVICE
-void BluetoothProxy::send_api_packet_(const esp32_ble_tracker::ESPBTDevice &device) {
-  api::BluetoothLEAdvertisementResponse resp;
-  resp.address = device.address_uint64();
-  resp.address_type = device.get_address_type();
-  if (!device.get_name().empty())
-    resp.name = device.get_name();
-  resp.rssi = device.get_rssi();
-
-  // Pre-allocate vectors based on known sizes
-  auto service_uuids = device.get_service_uuids();
-  resp.service_uuids.reserve(service_uuids.size());
-  for (auto &uuid : service_uuids) {
-    resp.service_uuids.emplace_back(uuid.to_string());
-  }
-
-  // Pre-allocate service data vector
-  auto service_datas = device.get_service_datas();
-  resp.service_data.reserve(service_datas.size());
-  for (auto &data : service_datas) {
-    resp.service_data.emplace_back();
-    auto &service_data = resp.service_data.back();
-    service_data.uuid = data.uuid.to_string();
-    service_data.data.assign(data.data.begin(), data.data.end());
-  }
-
-  // Pre-allocate manufacturer data vector
-  auto manufacturer_datas = device.get_manufacturer_datas();
-  resp.manufacturer_data.reserve(manufacturer_datas.size());
-  for (auto &data : manufacturer_datas) {
-    resp.manufacturer_data.emplace_back();
-    auto &manufacturer_data = resp.manufacturer_data.back();
-    manufacturer_data.uuid = data.uuid.to_string();
-    manufacturer_data.data.assign(data.data.begin(), data.data.end());
-  }
-
-  this->api_connection_->send_message(resp, api::BluetoothLEAdvertisementResponse::MESSAGE_TYPE);
-}
-#endif  // USE_ESP32_BLE_DEVICE
-
 void BluetoothProxy::dump_config() {
   ESP_LOGCONFIG(TAG, "Bluetooth Proxy:");
   ESP_LOGCONFIG(TAG,
diff --git a/esphome/components/bluetooth_proxy/bluetooth_proxy.h b/esphome/components/bluetooth_proxy/bluetooth_proxy.h
index 9d84a9dbf2..b3d9044a2c 100644
--- a/esphome/components/bluetooth_proxy/bluetooth_proxy.h
+++ b/esphome/components/bluetooth_proxy/bluetooth_proxy.h
@@ -132,9 +132,6 @@ class BluetoothProxy : public esp32_ble_tracker::ESPBTDeviceListener, public Com
   }
 
  protected:
-#ifdef USE_ESP32_BLE_DEVICE
-  void send_api_packet_(const esp32_ble_tracker::ESPBTDevice &device);
-#endif
   void send_bluetooth_scanner_state_(esp32_ble_tracker::ScannerState state);
 
   BluetoothConnection *get_connection_(uint64_t address, bool reserve);
diff --git a/script/api_protobuf/api_protobuf.py b/script/api_protobuf/api_protobuf.py
index bb0e01d171..2612d59544 100755
--- a/script/api_protobuf/api_protobuf.py
+++ b/script/api_protobuf/api_protobuf.py
@@ -971,11 +971,11 @@ class RepeatedTypeInfo(TypeInfo):
 
 def build_type_usage_map(
     file_desc: descriptor.FileDescriptorProto,
-) -> tuple[dict[str, str | None], dict[str, str | None], dict[str, int]]:
+) -> tuple[dict[str, str | None], dict[str, str | None], dict[str, int], set[str]]:
     """Build mappings for both enums and messages to their ifdefs based on usage.
 
     Returns:
-        tuple: (enum_ifdef_map, message_ifdef_map, message_source_map)
+        tuple: (enum_ifdef_map, message_ifdef_map, message_source_map, used_messages)
     """
     enum_ifdef_map: dict[str, str | None] = {}
     message_ifdef_map: dict[str, str | None] = {}
@@ -988,6 +988,7 @@ def build_type_usage_map(
     message_usage: dict[
         str, set[str]
     ] = {}  # message_name -> set of message names that use it
+    used_messages: set[str] = set()  # Track which messages are actually used
 
     # Build message name to ifdef mapping for quick lookup
     message_to_ifdef: dict[str, str | None] = {
@@ -996,17 +997,26 @@ def build_type_usage_map(
 
     # Analyze field usage
     for message in file_desc.message_type:
+        # Skip deprecated messages entirely
+        if message.options.deprecated:
+            continue
+
         for field in message.field:
+            # Skip deprecated fields when tracking enum usage
+            if field.options.deprecated:
+                continue
+
             type_name = field.type_name.split(".")[-1] if field.type_name else None
             if not type_name:
                 continue
 
-            # Track enum usage
+            # Track enum usage (only from non-deprecated fields)
             if field.type == 14:  # TYPE_ENUM
                 enum_usage.setdefault(type_name, set()).add(message.name)
             # Track message usage
             elif field.type == 11:  # TYPE_MESSAGE
                 message_usage.setdefault(type_name, set()).add(message.name)
+                used_messages.add(type_name)
 
     # Helper to get unique ifdef from a set of messages
     def get_unique_ifdef(message_names: set[str]) -> str | None:
@@ -1069,12 +1079,18 @@ def build_type_usage_map(
     # Build message source map
     # First pass: Get explicit sources for messages with source option or id
     for msg in file_desc.message_type:
+        # Skip deprecated messages
+        if msg.options.deprecated:
+            continue
+
         if msg.options.HasExtension(pb.source):
             # Explicit source option takes precedence
             message_source_map[msg.name] = get_opt(msg, pb.source, SOURCE_BOTH)
         elif msg.options.HasExtension(pb.id):
             # Service messages (with id) default to SOURCE_BOTH
             message_source_map[msg.name] = SOURCE_BOTH
+            # Service messages are always used
+            used_messages.add(msg.name)
 
     # Second pass: Determine sources for embedded messages based on their usage
     for msg in file_desc.message_type:
@@ -1103,7 +1119,12 @@ def build_type_usage_map(
             # Not used by any message and no explicit source - default to encode-only
             message_source_map[msg.name] = SOURCE_SERVER
 
-    return enum_ifdef_map, message_ifdef_map, message_source_map
+    return (
+        enum_ifdef_map,
+        message_ifdef_map,
+        message_source_map,
+        used_messages,
+    )
 
 
 def build_enum_type(desc, enum_ifdef_map) -> tuple[str, str, str]:
@@ -1145,6 +1166,10 @@ def calculate_message_estimated_size(desc: descriptor.DescriptorProto) -> int:
     total_size = 0
 
     for field in desc.field:
+        # Skip deprecated fields
+        if field.options.deprecated:
+            continue
+
         ti = create_field_type_info(field)
 
         # Add estimated size for this field
@@ -1213,6 +1238,10 @@ def build_message_type(
         public_content.append("#endif")
 
     for field in desc.field:
+        # Skip deprecated fields completely
+        if field.options.deprecated:
+            continue
+
         ti = create_field_type_info(field)
 
         # Skip field declarations for fields that are in the base class
@@ -1459,8 +1488,10 @@ def find_common_fields(
     if not messages:
         return []
 
-    # Start with fields from the first message
-    first_msg_fields = {field.name: field for field in messages[0].field}
+    # Start with fields from the first message (excluding deprecated fields)
+    first_msg_fields = {
+        field.name: field for field in messages[0].field if not field.options.deprecated
+    }
     common_fields = []
 
     # Check each field to see if it exists in all messages with same type
@@ -1471,6 +1502,9 @@ def find_common_fields(
         for msg in messages[1:]:
             found = False
             for other_field in msg.field:
+                # Skip deprecated fields
+                if other_field.options.deprecated:
+                    continue
                 if (
                     other_field.name == field_name
                     and other_field.type == field.type
@@ -1599,6 +1633,10 @@ def build_service_message_type(
     message_source_map: dict[str, int],
 ) -> tuple[str, str] | None:
     """Builds the service message type."""
+    # Skip deprecated messages
+    if mt.options.deprecated:
+        return None
+
     snake = camel_to_snake(mt.name)
     id_: int | None = get_opt(mt, pb.id)
     if id_ is None:
@@ -1700,12 +1738,18 @@ namespace api {
     content += "namespace enums {\n\n"
 
     # Build dynamic ifdef mappings for both enums and messages
-    enum_ifdef_map, message_ifdef_map, message_source_map = build_type_usage_map(file)
+    enum_ifdef_map, message_ifdef_map, message_source_map, used_messages = (
+        build_type_usage_map(file)
+    )
 
     # Simple grouping of enums by ifdef
     current_ifdef = None
 
     for enum in file.enum_type:
+        # Skip deprecated enums
+        if enum.options.deprecated:
+            continue
+
         s, c, dc = build_enum_type(enum, enum_ifdef_map)
         enum_ifdef = enum_ifdef_map.get(enum.name)
 
@@ -1756,6 +1800,14 @@ namespace api {
     current_ifdef = None
 
     for m in mt:
+        # Skip deprecated messages
+        if m.options.deprecated:
+            continue
+
+        # Skip messages that aren't used (unless they have an ID/service message)
+        if m.name not in used_messages and not m.options.HasExtension(pb.id):
+            continue
+
         s, c, dc = build_message_type(m, base_class_fields, message_source_map)
         msg_ifdef = message_ifdef_map.get(m.name)