diff --git a/.clang-tidy.hash b/.clang-tidy.hash
index 30cf982649..a6de2366bc 100644
--- a/.clang-tidy.hash
+++ b/.clang-tidy.hash
@@ -1 +1 @@
-6af8b429b94191fe8e239fcb3b73f7982d0266cb5b05ffbc81edaeac1bc8c273
+0440e35cf89a49e8a35fd3690ed453a72b7b6f61b9d346ced6140e1c0d39dff6
diff --git a/.github/workflows/auto-label-pr.yml b/.github/workflows/auto-label-pr.yml
index 63f059eb6d..c42b5330d2 100644
--- a/.github/workflows/auto-label-pr.yml
+++ b/.github/workflows/auto-label-pr.yml
@@ -105,7 +105,9 @@ jobs:
 
             // Calculate data from PR files
             const changedFiles = prFiles.map(file => file.filename);
-            const totalChanges = prFiles.reduce((sum, file) => sum + (file.additions || 0) + (file.deletions || 0), 0);
+            const totalAdditions = prFiles.reduce((sum, file) => sum + (file.additions || 0), 0);
+            const totalDeletions = prFiles.reduce((sum, file) => sum + (file.deletions || 0), 0);
+            const totalChanges = totalAdditions + totalDeletions;
 
             console.log('Current labels:', currentLabels.join(', '));
             console.log('Changed files:', changedFiles.length);
@@ -231,16 +233,21 @@ jobs:
             // Strategy: PR size detection
             async function detectPRSize() {
               const labels = new Set();
-              const testChanges = prFiles
-                .filter(file => file.filename.startsWith('tests/'))
-                .reduce((sum, file) => sum + (file.additions || 0) + (file.deletions || 0), 0);
-
-              const nonTestChanges = totalChanges - testChanges;
 
               if (totalChanges <= SMALL_PR_THRESHOLD) {
                 labels.add('small-pr');
+                return labels;
               }
 
+              const testAdditions = prFiles
+                .filter(file => file.filename.startsWith('tests/'))
+                .reduce((sum, file) => sum + (file.additions || 0), 0);
+              const testDeletions = prFiles
+                .filter(file => file.filename.startsWith('tests/'))
+                .reduce((sum, file) => sum + (file.deletions || 0), 0);
+
+              const nonTestChanges = (totalAdditions - testAdditions) - (totalDeletions - testDeletions);
+
               // Don't add too-big if mega-pr label is already present
               if (nonTestChanges > TOO_BIG_THRESHOLD && !isMegaPR) {
                 labels.add('too-big');
@@ -375,7 +382,7 @@ jobs:
               const labels = new Set();
 
               // Check for missing tests
-              if ((allLabels.has('new-component') || allLabels.has('new-platform')) && !allLabels.has('has-tests')) {
+              if ((allLabels.has('new-component') || allLabels.has('new-platform') || allLabels.has('new-feature')) && !allLabels.has('has-tests')) {
                 labels.add('needs-tests');
               }
 
@@ -412,10 +419,13 @@ jobs:
 
               // Too big message
               if (finalLabels.includes('too-big')) {
-                const testChanges = prFiles
+                const testAdditions = prFiles
                   .filter(file => file.filename.startsWith('tests/'))
-                  .reduce((sum, file) => sum + (file.additions || 0) + (file.deletions || 0), 0);
-                const nonTestChanges = totalChanges - testChanges;
+                  .reduce((sum, file) => sum + (file.additions || 0), 0);
+                const testDeletions = prFiles
+                  .filter(file => file.filename.startsWith('tests/'))
+                  .reduce((sum, file) => sum + (file.deletions || 0), 0);
+                const nonTestChanges = (totalAdditions - testAdditions) - (totalDeletions - testDeletions);
 
                 const tooManyLabels = finalLabels.length > MAX_LABELS;
                 const tooManyChanges = nonTestChanges > TOO_BIG_THRESHOLD;
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e50f2aef40..8f429f7b40 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -156,7 +156,7 @@ jobs:
           . venv/bin/activate
           pytest -vv --cov-report=xml --tb=native -n auto tests --ignore=tests/integration/
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v5.4.3
+        uses: codecov/codecov-action@v5.5.0
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
       - name: Save Python virtual environment cache
diff --git a/esphome/components/ags10/ags10.cpp b/esphome/components/ags10/ags10.cpp
index 9a29a979f3..fa7170114c 100644
--- a/esphome/components/ags10/ags10.cpp
+++ b/esphome/components/ags10/ags10.cpp
@@ -89,7 +89,7 @@ void AGS10Component::dump_config() {
 bool AGS10Component::new_i2c_address(uint8_t newaddress) {
   uint8_t rev_newaddress = ~newaddress;
   std::array<uint8_t, 5> data{newaddress, rev_newaddress, newaddress, rev_newaddress, 0};
-  data[4] = calc_crc8_(data, 4);
+  data[4] = crc8(data.data(), 4, 0xFF, 0x31, true);
   if (!this->write_bytes(REG_ADDRESS, data)) {
     this->error_code_ = COMMUNICATION_FAILED;
     this->status_set_warning();
@@ -109,7 +109,7 @@ bool AGS10Component::set_zero_point_with_current_resistance() { return this->set
 
 bool AGS10Component::set_zero_point_with(uint16_t value) {
   std::array<uint8_t, 5> data{0x00, 0x0C, (uint8_t) ((value >> 8) & 0xFF), (uint8_t) (value & 0xFF), 0};
-  data[4] = calc_crc8_(data, 4);
+  data[4] = crc8(data.data(), 4, 0xFF, 0x31, true);
   if (!this->write_bytes(REG_CALIBRATION, data)) {
     this->error_code_ = COMMUNICATION_FAILED;
     this->status_set_warning();
@@ -184,7 +184,7 @@ template<size_t N> optional<std::array<uint8_t, N>> AGS10Component::read_and_che
   auto res = *data;
   auto crc_byte = res[len];
 
-  if (crc_byte != calc_crc8_(res, len)) {
+  if (crc_byte != crc8(res.data(), len, 0xFF, 0x31, true)) {
     this->error_code_ = CRC_CHECK_FAILED;
     ESP_LOGE(TAG, "Reading AGS10 version failed: crc error!");
     return optional<std::array<uint8_t, N>>();
@@ -192,20 +192,5 @@ template<size_t N> optional<std::array<uint8_t, N>> AGS10Component::read_and_che
 
   return data;
 }
-
-template<size_t N> uint8_t AGS10Component::calc_crc8_(std::array<uint8_t, N> dat, uint8_t num) {
-  uint8_t i, byte1, crc = 0xFF;
-  for (byte1 = 0; byte1 < num; byte1++) {
-    crc ^= (dat[byte1]);
-    for (i = 0; i < 8; i++) {
-      if (crc & 0x80) {
-        crc = (crc << 1) ^ 0x31;
-      } else {
-        crc = (crc << 1);
-      }
-    }
-  }
-  return crc;
-}
 }  // namespace ags10
 }  // namespace esphome
diff --git a/esphome/components/ags10/ags10.h b/esphome/components/ags10/ags10.h
index 3e184ae176..e0975f14bc 100644
--- a/esphome/components/ags10/ags10.h
+++ b/esphome/components/ags10/ags10.h
@@ -1,9 +1,9 @@
 #pragma once
 
+#include "esphome/components/i2c/i2c.h"
+#include "esphome/components/sensor/sensor.h"
 #include "esphome/core/automation.h"
 #include "esphome/core/component.h"
-#include "esphome/components/sensor/sensor.h"
-#include "esphome/components/i2c/i2c.h"
 
 namespace esphome {
 namespace ags10 {
@@ -99,16 +99,6 @@ class AGS10Component : public PollingComponent, public i2c::I2CDevice {
    * Read, checks and returns data from the sensor.
    */
   template<size_t N> optional<std::array<uint8_t, N>> read_and_check_(uint8_t a_register);
-
-  /**
-   * Calculates CRC8 value.
-   *
-   * CRC8 calculation, initial value: 0xFF, polynomial: 0x31 (x8+ x5+ x4+1)
-   *
-   * @param[in] dat the data buffer
-   * @param num number of bytes in the buffer
-   */
-  template<size_t N> uint8_t calc_crc8_(std::array<uint8_t, N> dat, uint8_t num);
 };
 
 template<typename... Ts> class AGS10NewI2cAddressAction : public Action<Ts...>, public Parented<AGS10Component> {
diff --git a/esphome/components/airthings_ble/__init__.py b/esphome/components/airthings_ble/__init__.py
index eae400ab39..1545110798 100644
--- a/esphome/components/airthings_ble/__init__.py
+++ b/esphome/components/airthings_ble/__init__.py
@@ -18,6 +18,6 @@ CONFIG_SCHEMA = cv.Schema(
 ).extend(esp32_ble_tracker.ESP_BLE_DEVICE_SCHEMA)
 
 
-def to_code(config):
+async def to_code(config):
     var = cg.new_Pvariable(config[CONF_ID])
-    yield esp32_ble_tracker.register_ble_device(var, config)
+    await esp32_ble_tracker.register_ble_device(var, config)
diff --git a/esphome/components/am2315c/am2315c.cpp b/esphome/components/am2315c/am2315c.cpp
index 048c34d749..b20a8c6cbb 100644
--- a/esphome/components/am2315c/am2315c.cpp
+++ b/esphome/components/am2315c/am2315c.cpp
@@ -29,22 +29,6 @@ namespace am2315c {
 
 static const char *const TAG = "am2315c";
 
-uint8_t AM2315C::crc8_(uint8_t *data, uint8_t len) {
-  uint8_t crc = 0xFF;
-  while (len--) {
-    crc ^= *data++;
-    for (uint8_t i = 0; i < 8; i++) {
-      if (crc & 0x80) {
-        crc <<= 1;
-        crc ^= 0x31;
-      } else {
-        crc <<= 1;
-      }
-    }
-  }
-  return crc;
-}
-
 bool AM2315C::reset_register_(uint8_t reg) {
   //  code based on demo code sent by www.aosong.com
   //  no further documentation.
@@ -86,7 +70,7 @@ bool AM2315C::convert_(uint8_t *data, float &humidity, float &temperature) {
   humidity = raw * 9.5367431640625e-5;
   raw = ((data[3] & 0x0F) << 16) | (data[4] << 8) | data[5];
   temperature = raw * 1.9073486328125e-4 - 50;
-  return this->crc8_(data, 6) == data[6];
+  return crc8(data, 6, 0xFF, 0x31, true) == data[6];
 }
 
 void AM2315C::setup() {
diff --git a/esphome/components/am2315c/am2315c.h b/esphome/components/am2315c/am2315c.h
index 9cec40e4c2..c8d01beeaa 100644
--- a/esphome/components/am2315c/am2315c.h
+++ b/esphome/components/am2315c/am2315c.h
@@ -21,9 +21,9 @@
 // SOFTWARE.
 #pragma once
 
-#include "esphome/core/component.h"
-#include "esphome/components/sensor/sensor.h"
 #include "esphome/components/i2c/i2c.h"
+#include "esphome/components/sensor/sensor.h"
+#include "esphome/core/component.h"
 
 namespace esphome {
 namespace am2315c {
@@ -39,7 +39,6 @@ class AM2315C : public PollingComponent, public i2c::I2CDevice {
   void set_humidity_sensor(sensor::Sensor *humidity_sensor) { this->humidity_sensor_ = humidity_sensor; }
 
  protected:
-  uint8_t crc8_(uint8_t *data, uint8_t len);
   bool convert_(uint8_t *data, float &humidity, float &temperature);
   bool reset_register_(uint8_t reg);
 
diff --git a/esphome/components/api/__init__.py b/esphome/components/api/__init__.py
index ba5f994e9a..2672ea1edb 100644
--- a/esphome/components/api/__init__.py
+++ b/esphome/components/api/__init__.py
@@ -321,6 +321,7 @@ HOMEASSISTANT_TAG_SCANNED_ACTION_SCHEMA = cv.maybe_simple_value(
     HOMEASSISTANT_TAG_SCANNED_ACTION_SCHEMA,
 )
 async def homeassistant_tag_scanned_to_code(config, action_id, template_arg, args):
+    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)
     cg.add(var.set_service("esphome.tag_scanned"))
diff --git a/esphome/components/api/api_connection.cpp b/esphome/components/api/api_connection.cpp
index 7c4abbe47f..fd4ef021e1 100644
--- a/esphome/components/api/api_connection.cpp
+++ b/esphome/components/api/api_connection.cpp
@@ -468,9 +468,7 @@ uint16_t APIConnection::try_send_light_state(EntityBase *entity, APIConnection *
   resp.cold_white = values.get_cold_white();
   resp.warm_white = values.get_warm_white();
   if (light->supports_effects()) {
-    // get_effect_name() returns temporary std::string - must store it
-    std::string effect_name = light->get_effect_name();
-    resp.set_effect(StringRef(effect_name));
+    resp.set_effect(light->get_effect_name_ref());
   }
   return fill_and_encode_entity_state(light, resp, LightStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
@@ -1434,9 +1432,7 @@ bool APIConnection::send_device_info_response(const DeviceInfoRequest &msg) {
   static constexpr auto ESPHOME_VERSION_REF = StringRef::from_lit(ESPHOME_VERSION);
   resp.set_esphome_version(ESPHOME_VERSION_REF);
 
-  // get_compilation_time() returns temporary std::string - must store it
-  std::string compilation_time = App.get_compilation_time();
-  resp.set_compilation_time(StringRef(compilation_time));
+  resp.set_compilation_time(App.get_compilation_time_ref());
 
   // Compile-time StringRef constants for manufacturers
 #if defined(USE_ESP8266) || defined(USE_ESP32)
diff --git a/esphome/components/api/api_connection.h b/esphome/components/api/api_connection.h
index e07ba315f4..6eb964e482 100644
--- a/esphome/components/api/api_connection.h
+++ b/esphome/components/api/api_connection.h
@@ -306,9 +306,15 @@ class APIConnection final : public APIServerConnection {
                                               APIConnection *conn, uint32_t remaining_size, bool is_single) {
     // Set common fields that are shared by all entity types
     msg.key = entity->get_object_id_hash();
-    // IMPORTANT: get_object_id() may return a temporary std::string
-    std::string object_id = entity->get_object_id();
-    msg.set_object_id(StringRef(object_id));
+    // Try to use static reference first to avoid allocation
+    StringRef static_ref = entity->get_object_id_ref_for_api_();
+    if (!static_ref.empty()) {
+      msg.set_object_id(static_ref);
+    } else {
+      // Dynamic case - need to allocate
+      std::string object_id = entity->get_object_id();
+      msg.set_object_id(StringRef(object_id));
+    }
 
     if (entity->has_own_name()) {
       msg.set_name(entity->get_name());
diff --git a/esphome/components/binary_sensor/binary_sensor.cpp b/esphome/components/binary_sensor/binary_sensor.cpp
index 02b83af552..e652d302b6 100644
--- a/esphome/components/binary_sensor/binary_sensor.cpp
+++ b/esphome/components/binary_sensor/binary_sensor.cpp
@@ -7,6 +7,19 @@ namespace binary_sensor {
 
 static const char *const TAG = "binary_sensor";
 
+// Function implementation of LOG_BINARY_SENSOR macro to reduce code size
+void log_binary_sensor(const char *tag, const char *prefix, const char *type, BinarySensor *obj) {
+  if (obj == nullptr) {
+    return;
+  }
+
+  ESP_LOGCONFIG(tag, "%s%s '%s'", prefix, type, obj->get_name().c_str());
+
+  if (!obj->get_device_class().empty()) {
+    ESP_LOGCONFIG(tag, "%s  Device Class: '%s'", prefix, obj->get_device_class().c_str());
+  }
+}
+
 void BinarySensor::publish_state(bool new_state) {
   if (this->filter_list_ == nullptr) {
     this->send_state_internal(new_state);
diff --git a/esphome/components/binary_sensor/binary_sensor.h b/esphome/components/binary_sensor/binary_sensor.h
index d61be7a49b..2bd17d97c9 100644
--- a/esphome/components/binary_sensor/binary_sensor.h
+++ b/esphome/components/binary_sensor/binary_sensor.h
@@ -10,13 +10,10 @@ namespace esphome {
 
 namespace binary_sensor {
 
-#define LOG_BINARY_SENSOR(prefix, type, obj) \
-  if ((obj) != nullptr) { \
-    ESP_LOGCONFIG(TAG, "%s%s '%s'", prefix, LOG_STR_LITERAL(type), (obj)->get_name().c_str()); \
-    if (!(obj)->get_device_class().empty()) { \
-      ESP_LOGCONFIG(TAG, "%s  Device Class: '%s'", prefix, (obj)->get_device_class().c_str()); \
-    } \
-  }
+class BinarySensor;
+void log_binary_sensor(const char *tag, const char *prefix, const char *type, BinarySensor *obj);
+
+#define LOG_BINARY_SENSOR(prefix, type, obj) log_binary_sensor(TAG, prefix, LOG_STR_LITERAL(type), obj)
 
 #define SUB_BINARY_SENSOR(name) \
  protected: \
diff --git a/esphome/components/ble_client/output/__init__.py b/esphome/components/ble_client/output/__init__.py
index 729885eb8b..22a6b29442 100644
--- a/esphome/components/ble_client/output/__init__.py
+++ b/esphome/components/ble_client/output/__init__.py
@@ -27,7 +27,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-def to_code(config):
+async def to_code(config):
     var = cg.new_Pvariable(config[CONF_ID])
     if len(config[CONF_SERVICE_UUID]) == len(esp32_ble_tracker.bt_uuid16_format):
         cg.add(
@@ -63,6 +63,6 @@ def to_code(config):
         )
         cg.add(var.set_char_uuid128(uuid128))
     cg.add(var.set_require_response(config[CONF_REQUIRE_RESPONSE]))
-    yield output.register_output(var, config)
-    yield ble_client.register_ble_node(var, config)
-    yield cg.register_component(var, config)
+    await output.register_output(var, config)
+    await ble_client.register_ble_node(var, config)
+    await cg.register_component(var, config)
diff --git a/esphome/components/bluetooth_proxy/bluetooth_connection.h b/esphome/components/bluetooth_proxy/bluetooth_connection.h
index a975d25d91..e5d5ff2dd6 100644
--- a/esphome/components/bluetooth_proxy/bluetooth_connection.h
+++ b/esphome/components/bluetooth_proxy/bluetooth_connection.h
@@ -8,7 +8,7 @@ namespace esphome::bluetooth_proxy {
 
 class BluetoothProxy;
 
-class BluetoothConnection : public esp32_ble_client::BLEClientBase {
+class BluetoothConnection final : public esp32_ble_client::BLEClientBase {
  public:
   void dump_config() override;
   void loop() override;
diff --git a/esphome/components/bluetooth_proxy/bluetooth_proxy.h b/esphome/components/bluetooth_proxy/bluetooth_proxy.h
index bc8d3ed762..c81c8c9532 100644
--- a/esphome/components/bluetooth_proxy/bluetooth_proxy.h
+++ b/esphome/components/bluetooth_proxy/bluetooth_proxy.h
@@ -50,7 +50,7 @@ enum BluetoothProxySubscriptionFlag : uint32_t {
   SUBSCRIPTION_RAW_ADVERTISEMENTS = 1 << 0,
 };
 
-class BluetoothProxy : public esp32_ble_tracker::ESPBTDeviceListener, public Component {
+class BluetoothProxy final : public esp32_ble_tracker::ESPBTDeviceListener, public Component {
   friend class BluetoothConnection;  // Allow connection to update connections_free_response_
  public:
   BluetoothProxy();
diff --git a/esphome/components/button/button.cpp b/esphome/components/button/button.cpp
index 4c4cb7740c..63d71dcb8a 100644
--- a/esphome/components/button/button.cpp
+++ b/esphome/components/button/button.cpp
@@ -6,6 +6,19 @@ namespace button {
 
 static const char *const TAG = "button";
 
+// Function implementation of LOG_BUTTON macro to reduce code size
+void log_button(const char *tag, const char *prefix, const char *type, Button *obj) {
+  if (obj == nullptr) {
+    return;
+  }
+
+  ESP_LOGCONFIG(tag, "%s%s '%s'", prefix, type, obj->get_name().c_str());
+
+  if (!obj->get_icon().empty()) {
+    ESP_LOGCONFIG(tag, "%s  Icon: '%s'", prefix, obj->get_icon().c_str());
+  }
+}
+
 void Button::press() {
   ESP_LOGD(TAG, "'%s' Pressed.", this->get_name().c_str());
   this->press_action();
diff --git a/esphome/components/button/button.h b/esphome/components/button/button.h
index 9488eca221..75b76f9dcf 100644
--- a/esphome/components/button/button.h
+++ b/esphome/components/button/button.h
@@ -7,13 +7,10 @@
 namespace esphome {
 namespace button {
 
-#define LOG_BUTTON(prefix, type, obj) \
-  if ((obj) != nullptr) { \
-    ESP_LOGCONFIG(TAG, "%s%s '%s'", prefix, LOG_STR_LITERAL(type), (obj)->get_name().c_str()); \
-    if (!(obj)->get_icon().empty()) { \
-      ESP_LOGCONFIG(TAG, "%s  Icon: '%s'", prefix, (obj)->get_icon().c_str()); \
-    } \
-  }
+class Button;
+void log_button(const char *tag, const char *prefix, const char *type, Button *obj);
+
+#define LOG_BUTTON(prefix, type, obj) log_button(TAG, prefix, LOG_STR_LITERAL(type), obj)
 
 #define SUB_BUTTON(name) \
  protected: \
diff --git a/esphome/components/ccs811/ccs811.cpp b/esphome/components/ccs811/ccs811.cpp
index cecb92b3df..2617d7577a 100644
--- a/esphome/components/ccs811/ccs811.cpp
+++ b/esphome/components/ccs811/ccs811.cpp
@@ -153,8 +153,8 @@ void CCS811Component::dump_config() {
   ESP_LOGCONFIG(TAG, "CCS811");
   LOG_I2C_DEVICE(this)
   LOG_UPDATE_INTERVAL(this)
-  LOG_SENSOR("  ", "CO2 Sensor", this->co2_)
-  LOG_SENSOR("  ", "TVOC Sensor", this->tvoc_)
+  LOG_SENSOR("  ", "CO2 Sensor", this->co2_);
+  LOG_SENSOR("  ", "TVOC Sensor", this->tvoc_);
   LOG_TEXT_SENSOR("  ", "Firmware Version Sensor", this->version_)
   if (this->baseline_) {
     ESP_LOGCONFIG(TAG, "  Baseline: %04X", *this->baseline_);
diff --git a/esphome/components/cover/__init__.py b/esphome/components/cover/__init__.py
index 0e01eb336f..383cfaf8fb 100644
--- a/esphome/components/cover/__init__.py
+++ b/esphome/components/cover/__init__.py
@@ -228,9 +228,9 @@ async def cover_stop_to_code(config, action_id, template_arg, args):
 
 
 @automation.register_action("cover.toggle", ToggleAction, COVER_ACTION_SCHEMA)
-def cover_toggle_to_code(config, action_id, template_arg, args):
-    paren = yield cg.get_variable(config[CONF_ID])
-    yield cg.new_Pvariable(action_id, template_arg, paren)
+async def cover_toggle_to_code(config, action_id, template_arg, args):
+    paren = await cg.get_variable(config[CONF_ID])
+    return cg.new_Pvariable(action_id, template_arg, paren)
 
 
 COVER_CONTROL_ACTION_SCHEMA = cv.Schema(
diff --git a/esphome/components/esp32_ble_client/ble_client_base.cpp b/esphome/components/esp32_ble_client/ble_client_base.cpp
index 2d84436d84..e23be2e0c1 100644
--- a/esphome/components/esp32_ble_client/ble_client_base.cpp
+++ b/esphome/components/esp32_ble_client/ble_client_base.cpp
@@ -159,8 +159,7 @@ void BLEClientBase::disconnect() {
     return;
   }
   if (this->state_ == espbt::ClientState::CONNECTING || this->conn_id_ == UNSET_CONN_ID) {
-    ESP_LOGW(TAG, "[%d] [%s] Disconnecting before connected, disconnect scheduled.", this->connection_index_,
-             this->address_str_.c_str());
+    this->log_warning_("Disconnect before connected, disconnect scheduled.");
     this->want_disconnect_ = true;
     return;
   }
@@ -172,13 +171,11 @@ void BLEClientBase::unconditional_disconnect() {
   ESP_LOGI(TAG, "[%d] [%s] Disconnecting (conn_id: %d).", this->connection_index_, this->address_str_.c_str(),
            this->conn_id_);
   if (this->state_ == espbt::ClientState::DISCONNECTING) {
-    ESP_LOGE(TAG, "[%d] [%s] Tried to disconnect while already disconnecting.", this->connection_index_,
-             this->address_str_.c_str());
+    this->log_error_("Already disconnecting");
     return;
   }
   if (this->conn_id_ == UNSET_CONN_ID) {
-    ESP_LOGE(TAG, "[%d] [%s] No connection ID set, cannot disconnect.", this->connection_index_,
-             this->address_str_.c_str());
+    this->log_error_("conn id unset, cannot disconnect");
     return;
   }
   auto err = esp_ble_gattc_close(this->gattc_if_, this->conn_id_);
@@ -234,6 +231,18 @@ void BLEClientBase::log_connection_params_(const char *param_type) {
   ESP_LOGD(TAG, "[%d] [%s] %s conn params", this->connection_index_, this->address_str_.c_str(), param_type);
 }
 
+void BLEClientBase::log_error_(const char *message) {
+  ESP_LOGE(TAG, "[%d] [%s] %s", this->connection_index_, this->address_str_.c_str(), message);
+}
+
+void BLEClientBase::log_error_(const char *message, int code) {
+  ESP_LOGE(TAG, "[%d] [%s] %s=%d", this->connection_index_, this->address_str_.c_str(), message, code);
+}
+
+void BLEClientBase::log_warning_(const char *message) {
+  ESP_LOGW(TAG, "[%d] [%s] %s", this->connection_index_, this->address_str_.c_str(), message);
+}
+
 void BLEClientBase::restore_medium_conn_params_() {
   // Restore to medium connection parameters after initial connection phase
   // This balances performance with bandwidth usage for normal operation
@@ -264,8 +273,7 @@ bool BLEClientBase::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_
                  this->app_id);
         this->gattc_if_ = esp_gattc_if;
       } else {
-        ESP_LOGE(TAG, "[%d] [%s] gattc app registration failed id=%d code=%d", this->connection_index_,
-                 this->address_str_.c_str(), param->reg.app_id, param->reg.status);
+        this->log_error_("gattc app registration failed status", param->reg.status);
         this->status_ = param->reg.status;
         this->mark_failed();
       }
@@ -281,8 +289,7 @@ bool BLEClientBase::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_
         // This should not happen but lets log it in case it does
         // because it means we have a bad assumption about how the
         // ESP BT stack works.
-        ESP_LOGE(TAG, "[%d] [%s] Got ESP_GATTC_OPEN_EVT while in %s state, status=%d", this->connection_index_,
-                 this->address_str_.c_str(), espbt::client_state_to_string(this->state_), param->open.status);
+        this->log_error_("ESP_GATTC_OPEN_EVT wrong state status", param->open.status);
       }
       if (param->open.status != ESP_GATT_OK && param->open.status != ESP_GATT_ALREADY_OPEN) {
         this->log_gattc_warning_("Connection open", param->open.status);
@@ -307,7 +314,7 @@ bool BLEClientBase::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_
         this->state_ = espbt::ClientState::ESTABLISHED;
         break;
       }
-      ESP_LOGD(TAG, "[%d] [%s] Searching for services", this->connection_index_, this->address_str_.c_str());
+      this->log_event_("Searching for services");
       esp_ble_gattc_search_service(esp_gattc_if, param->cfg_mtu.conn_id, nullptr);
       break;
     }
@@ -332,8 +339,7 @@ bool BLEClientBase::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_
       // Check if we were disconnected while waiting for service discovery
       if (param->disconnect.reason == ESP_GATT_CONN_TERMINATE_PEER_USER &&
           this->state_ == espbt::ClientState::CONNECTED) {
-        ESP_LOGW(TAG, "[%d] [%s] Disconnected by remote during service discovery", this->connection_index_,
-                 this->address_str_.c_str());
+        this->log_warning_("Remote closed during discovery");
       } else {
         ESP_LOGD(TAG, "[%d] [%s] ESP_GATTC_DISCONNECT_EVT, reason 0x%02x", this->connection_index_,
                  this->address_str_.c_str(), param->disconnect.reason);
@@ -506,16 +512,14 @@ void BLEClientBase::gap_event_handler(esp_gap_ble_cb_event_t event, esp_ble_gap_
         return;
       esp_bd_addr_t bd_addr;
       memcpy(bd_addr, param->ble_security.auth_cmpl.bd_addr, sizeof(esp_bd_addr_t));
-      ESP_LOGI(TAG, "[%d] [%s] auth complete. remote BD_ADDR: %s", this->connection_index_, this->address_str_.c_str(),
+      ESP_LOGI(TAG, "[%d] [%s] auth complete addr: %s", this->connection_index_, this->address_str_.c_str(),
                format_hex(bd_addr, 6).c_str());
       if (!param->ble_security.auth_cmpl.success) {
-        ESP_LOGE(TAG, "[%d] [%s] auth fail reason = 0x%x", this->connection_index_, this->address_str_.c_str(),
-                 param->ble_security.auth_cmpl.fail_reason);
+        this->log_error_("auth fail reason", param->ble_security.auth_cmpl.fail_reason);
       } else {
         this->paired_ = true;
-        ESP_LOGD(TAG, "[%d] [%s] auth success. address type = %d auth mode = %d", this->connection_index_,
-                 this->address_str_.c_str(), param->ble_security.auth_cmpl.addr_type,
-                 param->ble_security.auth_cmpl.auth_mode);
+        ESP_LOGD(TAG, "[%d] [%s] auth success type = %d mode = %d", this->connection_index_, this->address_str_.c_str(),
+                 param->ble_security.auth_cmpl.addr_type, param->ble_security.auth_cmpl.auth_mode);
       }
       break;
 
diff --git a/esphome/components/esp32_ble_client/ble_client_base.h b/esphome/components/esp32_ble_client/ble_client_base.h
index 2d00688dbd..1850b2c5b3 100644
--- a/esphome/components/esp32_ble_client/ble_client_base.h
+++ b/esphome/components/esp32_ble_client/ble_client_base.h
@@ -137,6 +137,10 @@ class BLEClientBase : public espbt::ESPBTClient, public Component {
   void log_gattc_warning_(const char *operation, esp_gatt_status_t status);
   void log_gattc_warning_(const char *operation, esp_err_t err);
   void log_connection_params_(const char *param_type);
+  // Compact error logging helpers to reduce flash usage
+  void log_error_(const char *message);
+  void log_error_(const char *message, int code);
+  void log_warning_(const char *message);
 };
 
 }  // namespace esphome::esp32_ble_client
diff --git a/esphome/components/grove_gas_mc_v2/grove_gas_mc_v2.cpp b/esphome/components/grove_gas_mc_v2/grove_gas_mc_v2.cpp
index 4842ee5d06..52ec8433a2 100644
--- a/esphome/components/grove_gas_mc_v2/grove_gas_mc_v2.cpp
+++ b/esphome/components/grove_gas_mc_v2/grove_gas_mc_v2.cpp
@@ -58,10 +58,10 @@ void GroveGasMultichannelV2Component::dump_config() {
   ESP_LOGCONFIG(TAG, "Grove Multichannel Gas Sensor V2");
   LOG_I2C_DEVICE(this)
   LOG_UPDATE_INTERVAL(this)
-  LOG_SENSOR("  ", "Nitrogen Dioxide", this->nitrogen_dioxide_sensor_)
-  LOG_SENSOR("  ", "Ethanol", this->ethanol_sensor_)
-  LOG_SENSOR("  ", "Carbon Monoxide", this->carbon_monoxide_sensor_)
-  LOG_SENSOR("  ", "TVOC", this->tvoc_sensor_)
+  LOG_SENSOR("  ", "Nitrogen Dioxide", this->nitrogen_dioxide_sensor_);
+  LOG_SENSOR("  ", "Ethanol", this->ethanol_sensor_);
+  LOG_SENSOR("  ", "Carbon Monoxide", this->carbon_monoxide_sensor_);
+  LOG_SENSOR("  ", "TVOC", this->tvoc_sensor_);
 
   if (this->is_failed()) {
     switch (this->error_code_) {
diff --git a/esphome/components/hlw8012/hlw8012.cpp b/esphome/components/hlw8012/hlw8012.cpp
index a28678e630..f293185cce 100644
--- a/esphome/components/hlw8012/hlw8012.cpp
+++ b/esphome/components/hlw8012/hlw8012.cpp
@@ -43,10 +43,10 @@ void HLW8012Component::dump_config() {
                 "  Voltage Divider: %.1f",
                 this->change_mode_every_, this->current_resistor_ * 1000.0f, this->voltage_divider_);
   LOG_UPDATE_INTERVAL(this)
-  LOG_SENSOR("  ", "Voltage", this->voltage_sensor_)
-  LOG_SENSOR("  ", "Current", this->current_sensor_)
-  LOG_SENSOR("  ", "Power", this->power_sensor_)
-  LOG_SENSOR("  ", "Energy", this->energy_sensor_)
+  LOG_SENSOR("  ", "Voltage", this->voltage_sensor_);
+  LOG_SENSOR("  ", "Current", this->current_sensor_);
+  LOG_SENSOR("  ", "Power", this->power_sensor_);
+  LOG_SENSOR("  ", "Energy", this->energy_sensor_);
 }
 float HLW8012Component::get_setup_priority() const { return setup_priority::DATA; }
 void HLW8012Component::update() {
diff --git a/esphome/components/hte501/hte501.cpp b/esphome/components/hte501/hte501.cpp
index 75770ceffe..fa81640f50 100644
--- a/esphome/components/hte501/hte501.cpp
+++ b/esphome/components/hte501/hte501.cpp
@@ -12,7 +12,7 @@ void HTE501Component::setup() {
   this->write(address, 2, false);
   uint8_t identification[9];
   this->read(identification, 9);
-  if (identification[8] != calc_crc8_(identification, 0, 7)) {
+  if (identification[8] != crc8(identification, 8, 0xFF, 0x31, true)) {
     this->error_code_ = CRC_CHECK_FAILED;
     this->mark_failed();
     return;
@@ -46,7 +46,8 @@ void HTE501Component::update() {
   this->set_timeout(50, [this]() {
     uint8_t i2c_response[6];
     this->read(i2c_response, 6);
-    if (i2c_response[2] != calc_crc8_(i2c_response, 0, 1) && i2c_response[5] != calc_crc8_(i2c_response, 3, 4)) {
+    if (i2c_response[2] != crc8(i2c_response, 2, 0xFF, 0x31, true) &&
+        i2c_response[5] != crc8(i2c_response + 3, 2, 0xFF, 0x31, true)) {
       this->error_code_ = CRC_CHECK_FAILED;
       this->status_set_warning();
       return;
@@ -67,24 +68,5 @@ void HTE501Component::update() {
     this->status_clear_warning();
   });
 }
-
-unsigned char HTE501Component::calc_crc8_(const unsigned char buf[], unsigned char from, unsigned char to) {
-  unsigned char crc_val = 0xFF;
-  unsigned char i = 0;
-  unsigned char j = 0;
-  for (i = from; i <= to; i++) {
-    int cur_val = buf[i];
-    for (j = 0; j < 8; j++) {
-      if (((crc_val ^ cur_val) & 0x80) != 0)  // If MSBs are not equal
-      {
-        crc_val = ((crc_val << 1) ^ 0x31);
-      } else {
-        crc_val = (crc_val << 1);
-      }
-      cur_val = cur_val << 1;
-    }
-  }
-  return crc_val;
-}
 }  // namespace hte501
 }  // namespace esphome
diff --git a/esphome/components/hte501/hte501.h b/esphome/components/hte501/hte501.h
index 0d2c952e81..a7072d5bdb 100644
--- a/esphome/components/hte501/hte501.h
+++ b/esphome/components/hte501/hte501.h
@@ -1,8 +1,8 @@
 #pragma once
 
-#include "esphome/core/component.h"
-#include "esphome/components/sensor/sensor.h"
 #include "esphome/components/i2c/i2c.h"
+#include "esphome/components/sensor/sensor.h"
+#include "esphome/core/component.h"
 
 namespace esphome {
 namespace hte501 {
@@ -19,7 +19,6 @@ class HTE501Component : public PollingComponent, public i2c::I2CDevice {
   void update() override;
 
  protected:
-  unsigned char calc_crc8_(const unsigned char buf[], unsigned char from, unsigned char to);
   sensor::Sensor *temperature_sensor_;
   sensor::Sensor *humidity_sensor_;
 
diff --git a/esphome/components/lc709203f/lc709203f.cpp b/esphome/components/lc709203f/lc709203f.cpp
index e5d12a75d4..f711cb4f0e 100644
--- a/esphome/components/lc709203f/lc709203f.cpp
+++ b/esphome/components/lc709203f/lc709203f.cpp
@@ -1,5 +1,6 @@
-#include "esphome/core/log.h"
 #include "lc709203f.h"
+#include "esphome/core/helpers.h"
+#include "esphome/core/log.h"
 
 namespace esphome {
 namespace lc709203f {
@@ -189,7 +190,7 @@ uint8_t Lc709203f::get_register_(uint8_t register_to_read, uint16_t *register_va
       // Error on the i2c bus
       this->status_set_warning(
           str_sprintf("Error code %d when reading from register 0x%02X", return_code, register_to_read).c_str());
-    } else if (this->crc8_(read_buffer, 5) != read_buffer[5]) {
+    } else if (crc8(read_buffer, 5, 0x00, 0x07, true) != read_buffer[5]) {
       // I2C indicated OK, but the CRC of the data does not matcth.
       this->status_set_warning(str_sprintf("CRC error reading from register 0x%02X", register_to_read).c_str());
     } else {
@@ -220,7 +221,7 @@ uint8_t Lc709203f::set_register_(uint8_t register_to_set, uint16_t value_to_set)
   write_buffer[1] = register_to_set;
   write_buffer[2] = value_to_set & 0xFF;         // Low byte
   write_buffer[3] = (value_to_set >> 8) & 0xFF;  // High byte
-  write_buffer[4] = this->crc8_(write_buffer, 4);
+  write_buffer[4] = crc8(write_buffer, 4, 0x00, 0x07, true);
 
   for (uint8_t i = 0; i <= LC709203F_I2C_RETRY_COUNT; i++) {
     // Note: we don't write the first byte of the write buffer to the device.
@@ -239,20 +240,6 @@ uint8_t Lc709203f::set_register_(uint8_t register_to_set, uint16_t value_to_set)
   return return_code;
 }
 
-uint8_t Lc709203f::crc8_(uint8_t *byte_buffer, uint8_t length_of_crc) {
-  uint8_t crc = 0x00;
-  const uint8_t polynomial(0x07);
-
-  for (uint8_t j = length_of_crc; j; --j) {
-    crc ^= *byte_buffer++;
-
-    for (uint8_t i = 8; i; --i) {
-      crc = (crc & 0x80) ? (crc << 1) ^ polynomial : (crc << 1);
-    }
-  }
-  return crc;
-}
-
 void Lc709203f::set_pack_size(uint16_t pack_size) {
   static const uint16_t PACK_SIZE_ARRAY[6] = {100, 200, 500, 1000, 2000, 3000};
   static const uint16_t APA_ARRAY[6] = {0x08, 0x0B, 0x10, 0x19, 0x2D, 0x36};
diff --git a/esphome/components/lc709203f/lc709203f.h b/esphome/components/lc709203f/lc709203f.h
index 3b5b04775f..59988a0079 100644
--- a/esphome/components/lc709203f/lc709203f.h
+++ b/esphome/components/lc709203f/lc709203f.h
@@ -1,8 +1,8 @@
 #pragma once
 
-#include "esphome/core/component.h"
-#include "esphome/components/sensor/sensor.h"
 #include "esphome/components/i2c/i2c.h"
+#include "esphome/components/sensor/sensor.h"
+#include "esphome/core/component.h"
 
 namespace esphome {
 namespace lc709203f {
@@ -38,7 +38,6 @@ class Lc709203f : public sensor::Sensor, public PollingComponent, public i2c::I2
  private:
   uint8_t get_register_(uint8_t register_to_read, uint16_t *register_value);
   uint8_t set_register_(uint8_t register_to_set, uint16_t value_to_set);
-  uint8_t crc8_(uint8_t *byte_buffer, uint8_t length_of_crc);
 
  protected:
   sensor::Sensor *voltage_sensor_{nullptr};
diff --git a/esphome/components/ld2420/text_sensor/text_sensor.cpp b/esphome/components/ld2420/text_sensor/ld2420_text_sensor.cpp
similarity index 91%
rename from esphome/components/ld2420/text_sensor/text_sensor.cpp
rename to esphome/components/ld2420/text_sensor/ld2420_text_sensor.cpp
index 73af3b3660..f647a36936 100644
--- a/esphome/components/ld2420/text_sensor/text_sensor.cpp
+++ b/esphome/components/ld2420/text_sensor/ld2420_text_sensor.cpp
@@ -1,4 +1,4 @@
-#include "text_sensor.h"
+#include "ld2420_text_sensor.h"
 #include "esphome/core/helpers.h"
 #include "esphome/core/log.h"
 
diff --git a/esphome/components/ld2420/text_sensor/text_sensor.h b/esphome/components/ld2420/text_sensor/ld2420_text_sensor.h
similarity index 100%
rename from esphome/components/ld2420/text_sensor/text_sensor.h
rename to esphome/components/ld2420/text_sensor/ld2420_text_sensor.h
diff --git a/esphome/components/libretiny/preferences.cpp b/esphome/components/libretiny/preferences.cpp
index ce4ed915c0..fc535c99b4 100644
--- a/esphome/components/libretiny/preferences.cpp
+++ b/esphome/components/libretiny/preferences.cpp
@@ -5,7 +5,7 @@
 #include "esphome/core/preferences.h"
 #include <flashdb.h>
 #include <cstring>
-#include <vector>
+#include <memory>
 #include <string>
 
 namespace esphome {
@@ -139,21 +139,29 @@ class LibreTinyPreferences : public ESPPreferences {
   }
 
   bool is_changed(const fdb_kvdb_t db, const NVSData &to_save) {
-    NVSData stored_data{};
     struct fdb_kv kv;
     fdb_kv_t kvp = fdb_kv_get_obj(db, to_save.key.c_str(), &kv);
     if (kvp == nullptr) {
       ESP_LOGV(TAG, "fdb_kv_get_obj('%s'): nullptr - the key might not be set yet", to_save.key.c_str());
       return true;
     }
-    stored_data.data.resize(kv.value_len);
-    fdb_blob_make(&blob, stored_data.data.data(), kv.value_len);
+
+    // Check size first - if different, data has changed
+    if (kv.value_len != to_save.data.size()) {
+      return true;
+    }
+
+    // Allocate buffer on heap to avoid stack allocation for large data
+    auto stored_data = std::make_unique<uint8_t[]>(kv.value_len);
+    fdb_blob_make(&blob, stored_data.get(), kv.value_len);
     size_t actual_len = fdb_kv_get_blob(db, to_save.key.c_str(), &blob);
     if (actual_len != kv.value_len) {
       ESP_LOGV(TAG, "fdb_kv_get_blob('%s') len mismatch: %u != %u", to_save.key.c_str(), actual_len, kv.value_len);
       return true;
     }
-    return to_save.data != stored_data.data;
+
+    // Compare the actual data
+    return memcmp(to_save.data.data(), stored_data.get(), kv.value_len) != 0;
   }
 
   bool reset() override {
diff --git a/esphome/components/light/addressable_light_effect.h b/esphome/components/light/addressable_light_effect.h
index d622ec0375..fcf76b3cb0 100644
--- a/esphome/components/light/addressable_light_effect.h
+++ b/esphome/components/light/addressable_light_effect.h
@@ -44,6 +44,13 @@ class AddressableLightEffect : public LightEffect {
     this->apply(*this->get_addressable_(), current_color);
   }
 
+  /// Get effect index specifically for addressable effects.
+  /// Can be used by effects to modify behavior based on their position in the list.
+  uint32_t get_effect_index() const { return this->get_index(); }
+
+  /// Check if this is the currently running addressable effect.
+  bool is_current_effect() const { return this->is_active() && this->get_addressable_()->is_effect_active(); }
+
  protected:
   AddressableLight *get_addressable_() const { return (AddressableLight *) this->state_->get_output(); }
 };
diff --git a/esphome/components/light/base_light_effects.h b/esphome/components/light/base_light_effects.h
index 9e02e889c9..ff6cd1ccfe 100644
--- a/esphome/components/light/base_light_effects.h
+++ b/esphome/components/light/base_light_effects.h
@@ -125,6 +125,10 @@ class LambdaLightEffect : public LightEffect {
     }
   }
 
+  /// Get the current effect index for use in lambda functions.
+  /// This can be useful for lambda effects that need to know their own index.
+  uint32_t get_current_index() const { return this->get_index(); }
+
  protected:
   std::function<void(bool initial_run)> f_;
   uint32_t update_interval_;
@@ -143,6 +147,10 @@ class AutomationLightEffect : public LightEffect {
   }
   Trigger<> *get_trig() const { return trig_; }
 
+  /// Get the current effect index for use in automations.
+  /// Useful for automations that need to know which effect is running.
+  uint32_t get_current_index() const { return this->get_index(); }
+
  protected:
   Trigger<> *trig_{new Trigger<>};
 };
diff --git a/esphome/components/light/light_effect.cpp b/esphome/components/light/light_effect.cpp
new file mode 100644
index 0000000000..a210b48e5b
--- /dev/null
+++ b/esphome/components/light/light_effect.cpp
@@ -0,0 +1,36 @@
+#include "light_effect.h"
+#include "light_state.h"
+
+namespace esphome {
+namespace light {
+
+uint32_t LightEffect::get_index() const {
+  if (this->state_ == nullptr) {
+    return 0;
+  }
+  return this->get_index_in_parent_();
+}
+
+bool LightEffect::is_active() const {
+  if (this->state_ == nullptr) {
+    return false;
+  }
+  return this->get_index() != 0 && this->state_->get_current_effect_index() == this->get_index();
+}
+
+uint32_t LightEffect::get_index_in_parent_() const {
+  if (this->state_ == nullptr) {
+    return 0;
+  }
+
+  const auto &effects = this->state_->get_effects();
+  for (size_t i = 0; i < effects.size(); i++) {
+    if (effects[i] == this) {
+      return i + 1;  // Effects are 1-indexed in the API
+    }
+  }
+  return 0;  // Not found
+}
+
+}  // namespace light
+}  // namespace esphome
diff --git a/esphome/components/light/light_effect.h b/esphome/components/light/light_effect.h
index 8da51fe8b3..dbaf1faf24 100644
--- a/esphome/components/light/light_effect.h
+++ b/esphome/components/light/light_effect.h
@@ -34,9 +34,23 @@ class LightEffect {
     this->init();
   }
 
+  /// Get the index of this effect in the parent light's effect list.
+  /// Returns 0 if not found or not initialized.
+  uint32_t get_index() const;
+
+  /// Check if this effect is currently active.
+  bool is_active() const;
+
+  /// Get a reference to the parent light state.
+  /// Returns nullptr if not initialized.
+  LightState *get_light_state() const { return this->state_; }
+
  protected:
   LightState *state_{nullptr};
   std::string name_;
+
+  /// Internal method to find this effect's index in the parent light's effect list.
+  uint32_t get_index_in_parent_() const;
 };
 
 }  // namespace light
diff --git a/esphome/components/light/light_json_schema.cpp b/esphome/components/light/light_json_schema.cpp
index 896b821705..010e130612 100644
--- a/esphome/components/light/light_json_schema.cpp
+++ b/esphome/components/light/light_json_schema.cpp
@@ -36,8 +36,11 @@ static constexpr const char *get_color_mode_json_str(ColorMode mode) {
 
 void LightJSONSchema::dump_json(LightState &state, JsonObject root) {
   // NOLINTNEXTLINE(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
-  if (state.supports_effects())
+  if (state.supports_effects()) {
     root["effect"] = state.get_effect_name();
+    root["effect_index"] = state.get_current_effect_index();
+    root["effect_count"] = state.get_effect_count();
+  }
 
   auto values = state.remote_values;
   auto traits = state.get_output()->get_traits();
@@ -160,6 +163,11 @@ void LightJSONSchema::parse_json(LightState &state, LightCall &call, JsonObject
     const char *effect = root["effect"];
     call.set_effect(effect);
   }
+
+  if (root["effect_index"].is<uint32_t>()) {
+    uint32_t effect_index = root["effect_index"];
+    call.set_effect(effect_index);
+  }
 }
 
 }  // namespace light
diff --git a/esphome/components/light/light_state.cpp b/esphome/components/light/light_state.cpp
index 5b57707d6b..9e42b2f1e2 100644
--- a/esphome/components/light/light_state.cpp
+++ b/esphome/components/light/light_state.cpp
@@ -140,12 +140,22 @@ float LightState::get_setup_priority() const { return setup_priority::HARDWARE -
 void LightState::publish_state() { this->remote_values_callback_.call(); }
 
 LightOutput *LightState::get_output() const { return this->output_; }
+
+static constexpr const char *EFFECT_NONE = "None";
+static constexpr auto EFFECT_NONE_REF = StringRef::from_lit("None");
+
 std::string LightState::get_effect_name() {
   if (this->active_effect_index_ > 0) {
     return this->effects_[this->active_effect_index_ - 1]->get_name();
-  } else {
-    return "None";
   }
+  return EFFECT_NONE;
+}
+
+StringRef LightState::get_effect_name_ref() {
+  if (this->active_effect_index_ > 0) {
+    return StringRef(this->effects_[this->active_effect_index_ - 1]->get_name());
+  }
+  return EFFECT_NONE_REF;
 }
 
 void LightState::add_new_remote_values_callback(std::function<void()> &&send_callback) {
diff --git a/esphome/components/light/light_state.h b/esphome/components/light/light_state.h
index 72cb99223e..48323dd3c3 100644
--- a/esphome/components/light/light_state.h
+++ b/esphome/components/light/light_state.h
@@ -4,6 +4,7 @@
 #include "esphome/core/entity_base.h"
 #include "esphome/core/optional.h"
 #include "esphome/core/preferences.h"
+#include "esphome/core/string_ref.h"
 #include "light_call.h"
 #include "light_color_values.h"
 #include "light_effect.h"
@@ -116,6 +117,8 @@ class LightState : public EntityBase, public Component {
 
   /// Return the name of the current effect, or if no effect is active "None".
   std::string get_effect_name();
+  /// Return the name of the current effect as StringRef (for API usage)
+  StringRef get_effect_name_ref();
 
   /**
    * This lets front-end components subscribe to light change events. This callback is called once
@@ -160,6 +163,44 @@ class LightState : public EntityBase, public Component {
   /// Add effects for this light state.
   void add_effects(const std::vector<LightEffect *> &effects);
 
+  /// Get the total number of effects available for this light.
+  size_t get_effect_count() const { return this->effects_.size(); }
+
+  /// Get the currently active effect index (0 = no effect, 1+ = effect index).
+  uint32_t get_current_effect_index() const { return this->active_effect_index_; }
+
+  /// Get effect index by name. Returns 0 if effect not found.
+  uint32_t get_effect_index(const std::string &effect_name) const {
+    if (strcasecmp(effect_name.c_str(), "none") == 0) {
+      return 0;
+    }
+    for (size_t i = 0; i < this->effects_.size(); i++) {
+      if (strcasecmp(effect_name.c_str(), this->effects_[i]->get_name().c_str()) == 0) {
+        return i + 1;  // Effects are 1-indexed in active_effect_index_
+      }
+    }
+    return 0;  // Effect not found
+  }
+
+  /// Get effect by index. Returns nullptr if index is invalid.
+  LightEffect *get_effect_by_index(uint32_t index) const {
+    if (index == 0 || index > this->effects_.size()) {
+      return nullptr;
+    }
+    return this->effects_[index - 1];  // Effects are 1-indexed in active_effect_index_
+  }
+
+  /// Get effect name by index. Returns "None" for index 0, empty string for invalid index.
+  std::string get_effect_name_by_index(uint32_t index) const {
+    if (index == 0) {
+      return "None";
+    }
+    if (index > this->effects_.size()) {
+      return "";  // Invalid index
+    }
+    return this->effects_[index - 1]->get_name();
+  }
+
   /// The result of all the current_values_as_* methods have gamma correction applied.
   void current_values_as_binary(bool *binary);
 
diff --git a/esphome/components/mdns/mdns_component.cpp b/esphome/components/mdns/mdns_component.cpp
index 640750720d..316a10596f 100644
--- a/esphome/components/mdns/mdns_component.cpp
+++ b/esphome/components/mdns/mdns_component.cpp
@@ -24,100 +24,139 @@ static const char *const TAG = "mdns";
 void MDNSComponent::compile_records_() {
   this->hostname_ = App.get_name();
 
-  this->services_.clear();
+  // Calculate exact capacity needed for services vector
+  size_t services_count = 0;
 #ifdef USE_API
   if (api::global_api_server != nullptr) {
-    MDNSService service{};
+    services_count++;
+  }
+#endif
+#ifdef USE_PROMETHEUS
+  services_count++;
+#endif
+#ifdef USE_WEBSERVER
+  services_count++;
+#endif
+#ifdef USE_MDNS_EXTRA_SERVICES
+  services_count += this->services_extra_.size();
+#endif
+  // Reserve for fallback service if needed
+  if (services_count == 0) {
+    services_count = 1;
+  }
+  this->services_.reserve(services_count);
+
+#ifdef USE_API
+  if (api::global_api_server != nullptr) {
+    this->services_.emplace_back();
+    auto &service = this->services_.back();
     service.service_type = "_esphomelib";
     service.proto = "_tcp";
     service.port = api::global_api_server->get_port();
-    if (!App.get_friendly_name().empty()) {
-      service.txt_records.push_back({"friendly_name", App.get_friendly_name()});
-    }
-    service.txt_records.push_back({"version", ESPHOME_VERSION});
-    service.txt_records.push_back({"mac", get_mac_address()});
-    const char *platform = nullptr;
-#ifdef USE_ESP8266
-    platform = "ESP8266";
-#endif
-#ifdef USE_ESP32
-    platform = "ESP32";
-#endif
-#ifdef USE_RP2040
-    platform = "RP2040";
-#endif
-#ifdef USE_LIBRETINY
-    platform = lt_cpu_get_model_name();
-#endif
-    if (platform != nullptr) {
-      service.txt_records.push_back({"platform", platform});
-    }
 
-    service.txt_records.push_back({"board", ESPHOME_BOARD});
+    const std::string &friendly_name = App.get_friendly_name();
+    bool friendly_name_empty = friendly_name.empty();
+
+    // Calculate exact capacity for txt_records
+    size_t txt_count = 3;  // version, mac, board (always present)
+    if (!friendly_name_empty) {
+      txt_count++;  // friendly_name
+    }
+#if defined(USE_ESP8266) || defined(USE_ESP32) || defined(USE_RP2040) || defined(USE_LIBRETINY)
+    txt_count++;  // platform
+#endif
+#if defined(USE_WIFI) || defined(USE_ETHERNET) || defined(USE_OPENTHREAD)
+    txt_count++;  // network
+#endif
+#ifdef USE_API_NOISE
+    txt_count++;  // api_encryption or api_encryption_supported
+#endif
+#ifdef ESPHOME_PROJECT_NAME
+    txt_count += 2;  // project_name and project_version
+#endif
+#ifdef USE_DASHBOARD_IMPORT
+    txt_count++;  // package_import_url
+#endif
+
+    auto &txt_records = service.txt_records;
+    txt_records.reserve(txt_count);
+
+    if (!friendly_name_empty) {
+      txt_records.emplace_back(MDNSTXTRecord{"friendly_name", friendly_name});
+    }
+    txt_records.emplace_back(MDNSTXTRecord{"version", ESPHOME_VERSION});
+    txt_records.emplace_back(MDNSTXTRecord{"mac", get_mac_address()});
+
+#ifdef USE_ESP8266
+    txt_records.emplace_back(MDNSTXTRecord{"platform", "ESP8266"});
+#elif defined(USE_ESP32)
+    txt_records.emplace_back(MDNSTXTRecord{"platform", "ESP32"});
+#elif defined(USE_RP2040)
+    txt_records.emplace_back(MDNSTXTRecord{"platform", "RP2040"});
+#elif defined(USE_LIBRETINY)
+    txt_records.emplace_back(MDNSTXTRecord{"platform", lt_cpu_get_model_name()});
+#endif
+
+    txt_records.emplace_back(MDNSTXTRecord{"board", ESPHOME_BOARD});
 
 #if defined(USE_WIFI)
-    service.txt_records.push_back({"network", "wifi"});
+    txt_records.emplace_back(MDNSTXTRecord{"network", "wifi"});
 #elif defined(USE_ETHERNET)
-    service.txt_records.push_back({"network", "ethernet"});
+    txt_records.emplace_back(MDNSTXTRecord{"network", "ethernet"});
 #elif defined(USE_OPENTHREAD)
-    service.txt_records.push_back({"network", "thread"});
+    txt_records.emplace_back(MDNSTXTRecord{"network", "thread"});
 #endif
 
 #ifdef USE_API_NOISE
+    static constexpr const char *NOISE_ENCRYPTION = "Noise_NNpsk0_25519_ChaChaPoly_SHA256";
     if (api::global_api_server->get_noise_ctx()->has_psk()) {
-      service.txt_records.push_back({"api_encryption", "Noise_NNpsk0_25519_ChaChaPoly_SHA256"});
+      txt_records.emplace_back(MDNSTXTRecord{"api_encryption", NOISE_ENCRYPTION});
     } else {
-      service.txt_records.push_back({"api_encryption_supported", "Noise_NNpsk0_25519_ChaChaPoly_SHA256"});
+      txt_records.emplace_back(MDNSTXTRecord{"api_encryption_supported", NOISE_ENCRYPTION});
     }
 #endif
 
 #ifdef ESPHOME_PROJECT_NAME
-    service.txt_records.push_back({"project_name", ESPHOME_PROJECT_NAME});
-    service.txt_records.push_back({"project_version", ESPHOME_PROJECT_VERSION});
+    txt_records.emplace_back(MDNSTXTRecord{"project_name", ESPHOME_PROJECT_NAME});
+    txt_records.emplace_back(MDNSTXTRecord{"project_version", ESPHOME_PROJECT_VERSION});
 #endif  // ESPHOME_PROJECT_NAME
 
 #ifdef USE_DASHBOARD_IMPORT
-    service.txt_records.push_back({"package_import_url", dashboard_import::get_package_import_url()});
+    txt_records.emplace_back(MDNSTXTRecord{"package_import_url", dashboard_import::get_package_import_url()});
 #endif
-
-    this->services_.push_back(service);
   }
 #endif  // USE_API
 
 #ifdef USE_PROMETHEUS
-  {
-    MDNSService service{};
-    service.service_type = "_prometheus-http";
-    service.proto = "_tcp";
-    service.port = USE_WEBSERVER_PORT;
-    this->services_.push_back(service);
-  }
+  this->services_.emplace_back();
+  auto &prom_service = this->services_.back();
+  prom_service.service_type = "_prometheus-http";
+  prom_service.proto = "_tcp";
+  prom_service.port = USE_WEBSERVER_PORT;
 #endif
 
 #ifdef USE_WEBSERVER
-  {
-    MDNSService service{};
-    service.service_type = "_http";
-    service.proto = "_tcp";
-    service.port = USE_WEBSERVER_PORT;
-    this->services_.push_back(service);
-  }
+  this->services_.emplace_back();
+  auto &web_service = this->services_.back();
+  web_service.service_type = "_http";
+  web_service.proto = "_tcp";
+  web_service.port = USE_WEBSERVER_PORT;
 #endif
 
 #ifdef USE_MDNS_EXTRA_SERVICES
   this->services_.insert(this->services_.end(), this->services_extra_.begin(), this->services_extra_.end());
 #endif
 
-  if (this->services_.empty()) {
-    // Publish "http" service if not using native API
-    // This is just to have *some* mDNS service so that .local resolution works
-    MDNSService service{};
-    service.service_type = "_http";
-    service.proto = "_tcp";
-    service.port = USE_WEBSERVER_PORT;
-    service.txt_records.push_back({"version", ESPHOME_VERSION});
-    this->services_.push_back(service);
-  }
+#if !defined(USE_API) && !defined(USE_PROMETHEUS) && !defined(USE_WEBSERVER) && !defined(USE_MDNS_EXTRA_SERVICES)
+  // Publish "http" service if not using native API or any other services
+  // This is just to have *some* mDNS service so that .local resolution works
+  this->services_.emplace_back();
+  auto &fallback_service = this->services_.back();
+  fallback_service.service_type = "_http";
+  fallback_service.proto = "_tcp";
+  fallback_service.port = USE_WEBSERVER_PORT;
+  fallback_service.txt_records.emplace_back(MDNSTXTRecord{"version", ESPHOME_VERSION});
+#endif
 }
 
 void MDNSComponent::dump_config() {
@@ -125,6 +164,7 @@ void MDNSComponent::dump_config() {
                 "mDNS:\n"
                 "  Hostname: %s",
                 this->hostname_.c_str());
+#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERY_VERBOSE
   ESP_LOGV(TAG, "  Services:");
   for (const auto &service : this->services_) {
     ESP_LOGV(TAG, "  - %s, %s, %d", service.service_type.c_str(), service.proto.c_str(),
@@ -134,6 +174,7 @@ void MDNSComponent::dump_config() {
                const_cast<TemplatableValue<std::string> &>(record.value).value().c_str());
     }
   }
+#endif
 }
 
 std::vector<MDNSService> MDNSComponent::get_services() { return this->services_; }
diff --git a/esphome/components/mlx90614/mlx90614.cpp b/esphome/components/mlx90614/mlx90614.cpp
index 2e711baf9a..24024df090 100644
--- a/esphome/components/mlx90614/mlx90614.cpp
+++ b/esphome/components/mlx90614/mlx90614.cpp
@@ -50,28 +50,13 @@ bool MLX90614Component::write_emissivity_() {
   return true;
 }
 
-uint8_t MLX90614Component::crc8_pec_(const uint8_t *data, uint8_t len) {
-  uint8_t crc = 0;
-  for (uint8_t i = 0; i < len; i++) {
-    uint8_t in = data[i];
-    for (uint8_t j = 0; j < 8; j++) {
-      bool carry = (crc ^ in) & 0x80;
-      crc <<= 1;
-      if (carry)
-        crc ^= 0x07;
-      in <<= 1;
-    }
-  }
-  return crc;
-}
-
 bool MLX90614Component::write_bytes_(uint8_t reg, uint16_t data) {
   uint8_t buf[5];
   buf[0] = this->address_ << 1;
   buf[1] = reg;
   buf[2] = data & 0xFF;
   buf[3] = data >> 8;
-  buf[4] = this->crc8_pec_(buf, 4);
+  buf[4] = crc8(buf, 4, 0x00, 0x07, true);
   return this->write_bytes(reg, buf + 2, 3);
 }
 
diff --git a/esphome/components/mlx90614/mlx90614.h b/esphome/components/mlx90614/mlx90614.h
index b6bd44172d..fa6fb523bb 100644
--- a/esphome/components/mlx90614/mlx90614.h
+++ b/esphome/components/mlx90614/mlx90614.h
@@ -22,7 +22,6 @@ class MLX90614Component : public PollingComponent, public i2c::I2CDevice {
  protected:
   bool write_emissivity_();
 
-  uint8_t crc8_pec_(const uint8_t *data, uint8_t len);
   bool write_bytes_(uint8_t reg, uint16_t data);
 
   sensor::Sensor *ambient_sensor_{nullptr};
diff --git a/esphome/components/ntc/ntc.cpp b/esphome/components/ntc/ntc.cpp
index 333dbc5a75..b08f84029b 100644
--- a/esphome/components/ntc/ntc.cpp
+++ b/esphome/components/ntc/ntc.cpp
@@ -11,7 +11,7 @@ void NTC::setup() {
   if (this->sensor_->has_state())
     this->process_(this->sensor_->state);
 }
-void NTC::dump_config() { LOG_SENSOR("", "NTC Sensor", this) }
+void NTC::dump_config() { LOG_SENSOR("", "NTC Sensor", this); }
 float NTC::get_setup_priority() const { return setup_priority::DATA; }
 void NTC::process_(float value) {
   if (std::isnan(value)) {
diff --git a/esphome/components/number/number.cpp b/esphome/components/number/number.cpp
index b6a845b19b..4769c1ed12 100644
--- a/esphome/components/number/number.cpp
+++ b/esphome/components/number/number.cpp
@@ -6,6 +6,27 @@ namespace number {
 
 static const char *const TAG = "number";
 
+// Function implementation of LOG_NUMBER macro to reduce code size
+void log_number(const char *tag, const char *prefix, const char *type, Number *obj) {
+  if (obj == nullptr) {
+    return;
+  }
+
+  ESP_LOGCONFIG(tag, "%s%s '%s'", prefix, type, obj->get_name().c_str());
+
+  if (!obj->get_icon().empty()) {
+    ESP_LOGCONFIG(tag, "%s  Icon: '%s'", prefix, obj->get_icon().c_str());
+  }
+
+  if (!obj->traits.get_unit_of_measurement().empty()) {
+    ESP_LOGCONFIG(tag, "%s  Unit of Measurement: '%s'", prefix, obj->traits.get_unit_of_measurement().c_str());
+  }
+
+  if (!obj->traits.get_device_class().empty()) {
+    ESP_LOGCONFIG(tag, "%s  Device Class: '%s'", prefix, obj->traits.get_device_class().c_str());
+  }
+}
+
 void Number::publish_state(float state) {
   this->set_has_state(true);
   this->state = state;
diff --git a/esphome/components/number/number.h b/esphome/components/number/number.h
index 49bcbb857c..da91d70d53 100644
--- a/esphome/components/number/number.h
+++ b/esphome/components/number/number.h
@@ -9,19 +9,10 @@
 namespace esphome {
 namespace number {
 
-#define LOG_NUMBER(prefix, type, obj) \
-  if ((obj) != nullptr) { \
-    ESP_LOGCONFIG(TAG, "%s%s '%s'", prefix, LOG_STR_LITERAL(type), (obj)->get_name().c_str()); \
-    if (!(obj)->get_icon().empty()) { \
-      ESP_LOGCONFIG(TAG, "%s  Icon: '%s'", prefix, (obj)->get_icon().c_str()); \
-    } \
-    if (!(obj)->traits.get_unit_of_measurement().empty()) { \
-      ESP_LOGCONFIG(TAG, "%s  Unit of Measurement: '%s'", prefix, (obj)->traits.get_unit_of_measurement().c_str()); \
-    } \
-    if (!(obj)->traits.get_device_class().empty()) { \
-      ESP_LOGCONFIG(TAG, "%s  Device Class: '%s'", prefix, (obj)->traits.get_device_class().c_str()); \
-    } \
-  }
+class Number;
+void log_number(const char *tag, const char *prefix, const char *type, Number *obj);
+
+#define LOG_NUMBER(prefix, type, obj) log_number(TAG, prefix, LOG_STR_LITERAL(type), obj)
 
 #define SUB_NUMBER(name) \
  protected: \
diff --git a/esphome/components/opentherm/hub.h b/esphome/components/opentherm/hub.h
index 80fd268820..ee0cfd104d 100644
--- a/esphome/components/opentherm/hub.h
+++ b/esphome/components/opentherm/hub.h
@@ -1,10 +1,10 @@
 #pragma once
 
+#include <vector>
+#include "esphome/core/component.h"
 #include "esphome/core/defines.h"
 #include "esphome/core/hal.h"
-#include "esphome/core/component.h"
 #include "esphome/core/log.h"
-#include <vector>
 
 #include "opentherm.h"
 
@@ -17,21 +17,21 @@
 #endif
 
 #ifdef OPENTHERM_USE_SWITCH
-#include "esphome/components/opentherm/switch/switch.h"
+#include "esphome/components/opentherm/switch/opentherm_switch.h"
 #endif
 
 #ifdef OPENTHERM_USE_OUTPUT
-#include "esphome/components/opentherm/output/output.h"
+#include "esphome/components/opentherm/output/opentherm_output.h"
 #endif
 
 #ifdef OPENTHERM_USE_NUMBER
-#include "esphome/components/opentherm/number/number.h"
+#include "esphome/components/opentherm/number/opentherm_number.h"
 #endif
 
+#include <functional>
 #include <memory>
 #include <unordered_map>
 #include <unordered_set>
-#include <functional>
 
 #include "opentherm_macros.h"
 
diff --git a/esphome/components/opentherm/number/number.cpp b/esphome/components/opentherm/number/opentherm_number.cpp
similarity index 97%
rename from esphome/components/opentherm/number/number.cpp
rename to esphome/components/opentherm/number/opentherm_number.cpp
index 90ab5d6490..c5d094aa36 100644
--- a/esphome/components/opentherm/number/number.cpp
+++ b/esphome/components/opentherm/number/opentherm_number.cpp
@@ -1,4 +1,4 @@
-#include "number.h"
+#include "opentherm_number.h"
 
 namespace esphome {
 namespace opentherm {
diff --git a/esphome/components/opentherm/number/number.h b/esphome/components/opentherm/number/opentherm_number.h
similarity index 100%
rename from esphome/components/opentherm/number/number.h
rename to esphome/components/opentherm/number/opentherm_number.h
diff --git a/esphome/components/opentherm/output/output.cpp b/esphome/components/opentherm/output/opentherm_output.cpp
similarity index 95%
rename from esphome/components/opentherm/output/output.cpp
rename to esphome/components/opentherm/output/opentherm_output.cpp
index 486aa0d4e7..ff82ddd72c 100644
--- a/esphome/components/opentherm/output/output.cpp
+++ b/esphome/components/opentherm/output/opentherm_output.cpp
@@ -1,5 +1,5 @@
 #include "esphome/core/helpers.h"  // for clamp() and lerp()
-#include "output.h"
+#include "opentherm_output.h"
 
 namespace esphome {
 namespace opentherm {
diff --git a/esphome/components/opentherm/output/output.h b/esphome/components/opentherm/output/opentherm_output.h
similarity index 100%
rename from esphome/components/opentherm/output/output.h
rename to esphome/components/opentherm/output/opentherm_output.h
diff --git a/esphome/components/opentherm/switch/switch.cpp b/esphome/components/opentherm/switch/opentherm_switch.cpp
similarity index 96%
rename from esphome/components/opentherm/switch/switch.cpp
rename to esphome/components/opentherm/switch/opentherm_switch.cpp
index 228d9ac8f3..5c5d62e68e 100644
--- a/esphome/components/opentherm/switch/switch.cpp
+++ b/esphome/components/opentherm/switch/opentherm_switch.cpp
@@ -1,4 +1,4 @@
-#include "switch.h"
+#include "opentherm_switch.h"
 
 namespace esphome {
 namespace opentherm {
diff --git a/esphome/components/opentherm/switch/switch.h b/esphome/components/opentherm/switch/opentherm_switch.h
similarity index 100%
rename from esphome/components/opentherm/switch/switch.h
rename to esphome/components/opentherm/switch/opentherm_switch.h
diff --git a/esphome/components/pipsolar/__init__.py b/esphome/components/pipsolar/__init__.py
index 1e4ea8492b..e3966aa2cc 100644
--- a/esphome/components/pipsolar/__init__.py
+++ b/esphome/components/pipsolar/__init__.py
@@ -26,7 +26,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-def to_code(config):
+async def to_code(config):
     var = cg.new_Pvariable(config[CONF_ID])
-    yield cg.register_component(var, config)
-    yield uart.register_uart_device(var, config)
+    await cg.register_component(var, config)
+    await uart.register_uart_device(var, config)
diff --git a/esphome/components/pipsolar/output/__init__.py b/esphome/components/pipsolar/output/__init__.py
index 1eb7249119..829f8f7037 100644
--- a/esphome/components/pipsolar/output/__init__.py
+++ b/esphome/components/pipsolar/output/__init__.py
@@ -99,9 +99,9 @@ async def to_code(config):
         }
     ),
 )
-def output_pipsolar_set_level_to_code(config, action_id, template_arg, args):
-    paren = yield cg.get_variable(config[CONF_ID])
+async def output_pipsolar_set_level_to_code(config, action_id, template_arg, args):
+    paren = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, paren)
-    template_ = yield cg.templatable(config[CONF_VALUE], args, float)
+    template_ = await cg.templatable(config[CONF_VALUE], args, float)
     cg.add(var.set_level(template_))
-    yield var
+    return var
diff --git a/esphome/components/pulse_width/pulse_width.cpp b/esphome/components/pulse_width/pulse_width.cpp
index 8d66861049..c086ceaa23 100644
--- a/esphome/components/pulse_width/pulse_width.cpp
+++ b/esphome/components/pulse_width/pulse_width.cpp
@@ -17,7 +17,7 @@ void IRAM_ATTR PulseWidthSensorStore::gpio_intr(PulseWidthSensorStore *arg) {
 }
 
 void PulseWidthSensor::dump_config() {
-  LOG_SENSOR("", "Pulse Width", this)
+  LOG_SENSOR("", "Pulse Width", this);
   LOG_UPDATE_INTERVAL(this)
   LOG_PIN("  Pin: ", this->pin_);
 }
diff --git a/esphome/components/radon_eye_ble/__init__.py b/esphome/components/radon_eye_ble/__init__.py
index 01910c81a8..99daef30e5 100644
--- a/esphome/components/radon_eye_ble/__init__.py
+++ b/esphome/components/radon_eye_ble/__init__.py
@@ -18,6 +18,6 @@ CONFIG_SCHEMA = cv.Schema(
 ).extend(esp32_ble_tracker.ESP_BLE_DEVICE_SCHEMA)
 
 
-def to_code(config):
+async def to_code(config):
     var = cg.new_Pvariable(config[CONF_ID])
-    yield esp32_ble_tracker.register_ble_device(var, config)
+    await esp32_ble_tracker.register_ble_device(var, config)
diff --git a/esphome/components/remote_base/__init__.py b/esphome/components/remote_base/__init__.py
index 8163661c65..42ebae77f7 100644
--- a/esphome/components/remote_base/__init__.py
+++ b/esphome/components/remote_base/__init__.py
@@ -1782,14 +1782,12 @@ def nexa_dumper(var, config):
 
 
 @register_action("nexa", NexaAction, NEXA_SCHEMA)
-def nexa_action(var, config, args):
-    cg.add(var.set_device((yield cg.templatable(config[CONF_DEVICE], args, cg.uint32))))
-    cg.add(var.set_group((yield cg.templatable(config[CONF_GROUP], args, cg.uint8))))
-    cg.add(var.set_state((yield cg.templatable(config[CONF_STATE], args, cg.uint8))))
-    cg.add(
-        var.set_channel((yield cg.templatable(config[CONF_CHANNEL], args, cg.uint8)))
-    )
-    cg.add(var.set_level((yield cg.templatable(config[CONF_LEVEL], args, cg.uint8))))
+async def nexa_action(var, config, args):
+    cg.add(var.set_device(await cg.templatable(config[CONF_DEVICE], args, cg.uint32)))
+    cg.add(var.set_group(await cg.templatable(config[CONF_GROUP], args, cg.uint8)))
+    cg.add(var.set_state(await cg.templatable(config[CONF_STATE], args, cg.uint8)))
+    cg.add(var.set_channel(await cg.templatable(config[CONF_CHANNEL], args, cg.uint8)))
+    cg.add(var.set_level(await cg.templatable(config[CONF_LEVEL], args, cg.uint8)))
 
 
 # Midea
diff --git a/esphome/components/sensor/sensor.cpp b/esphome/components/sensor/sensor.cpp
index 0a82677bc9..6df6347c18 100644
--- a/esphome/components/sensor/sensor.cpp
+++ b/esphome/components/sensor/sensor.cpp
@@ -6,6 +6,33 @@ namespace sensor {
 
 static const char *const TAG = "sensor";
 
+// Function implementation of LOG_SENSOR macro to reduce code size
+void log_sensor(const char *tag, const char *prefix, const char *type, Sensor *obj) {
+  if (obj == nullptr) {
+    return;
+  }
+
+  ESP_LOGCONFIG(tag,
+                "%s%s '%s'\n"
+                "%s  State Class: '%s'\n"
+                "%s  Unit of Measurement: '%s'\n"
+                "%s  Accuracy Decimals: %d",
+                prefix, type, obj->get_name().c_str(), prefix, state_class_to_string(obj->get_state_class()).c_str(),
+                prefix, obj->get_unit_of_measurement().c_str(), prefix, obj->get_accuracy_decimals());
+
+  if (!obj->get_device_class().empty()) {
+    ESP_LOGCONFIG(tag, "%s  Device Class: '%s'", prefix, obj->get_device_class().c_str());
+  }
+
+  if (!obj->get_icon().empty()) {
+    ESP_LOGCONFIG(tag, "%s  Icon: '%s'", prefix, obj->get_icon().c_str());
+  }
+
+  if (obj->get_force_update()) {
+    ESP_LOGV(tag, "%s  Force Update: YES", prefix);
+  }
+}
+
 std::string state_class_to_string(StateClass state_class) {
   switch (state_class) {
     case STATE_CLASS_MEASUREMENT:
diff --git a/esphome/components/sensor/sensor.h b/esphome/components/sensor/sensor.h
index c2ded0f2c3..b3206d8dab 100644
--- a/esphome/components/sensor/sensor.h
+++ b/esphome/components/sensor/sensor.h
@@ -12,26 +12,9 @@
 namespace esphome {
 namespace sensor {
 
-#define LOG_SENSOR(prefix, type, obj) \
-  if ((obj) != nullptr) { \
-    ESP_LOGCONFIG(TAG, \
-                  "%s%s '%s'\n" \
-                  "%s  State Class: '%s'\n" \
-                  "%s  Unit of Measurement: '%s'\n" \
-                  "%s  Accuracy Decimals: %d", \
-                  prefix, LOG_STR_LITERAL(type), (obj)->get_name().c_str(), prefix, \
-                  state_class_to_string((obj)->get_state_class()).c_str(), prefix, \
-                  (obj)->get_unit_of_measurement().c_str(), prefix, (obj)->get_accuracy_decimals()); \
-    if (!(obj)->get_device_class().empty()) { \
-      ESP_LOGCONFIG(TAG, "%s  Device Class: '%s'", prefix, (obj)->get_device_class().c_str()); \
-    } \
-    if (!(obj)->get_icon().empty()) { \
-      ESP_LOGCONFIG(TAG, "%s  Icon: '%s'", prefix, (obj)->get_icon().c_str()); \
-    } \
-    if ((obj)->get_force_update()) { \
-      ESP_LOGV(TAG, "%s  Force Update: YES", prefix); \
-    } \
-  }
+void log_sensor(const char *tag, const char *prefix, const char *type, Sensor *obj);
+
+#define LOG_SENSOR(prefix, type, obj) log_sensor(TAG, prefix, LOG_STR_LITERAL(type), obj)
 
 #define SUB_SENSOR(name) \
  protected: \
diff --git a/esphome/components/shelly_dimmer/light.py b/esphome/components/shelly_dimmer/light.py
index bb2c3ceee8..c96bc380d7 100644
--- a/esphome/components/shelly_dimmer/light.py
+++ b/esphome/components/shelly_dimmer/light.py
@@ -183,7 +183,7 @@ CONFIG_SCHEMA = (
 )
 
 
-def to_code(config):
+async def to_code(config):
     fw_hex = get_firmware(config[CONF_FIRMWARE])
     fw_major, fw_minor = parse_firmware_version(config[CONF_FIRMWARE][CONF_VERSION])
 
@@ -193,17 +193,17 @@ def to_code(config):
     cg.add_define("USE_SHD_FIRMWARE_MINOR_VERSION", fw_minor)
 
     var = cg.new_Pvariable(config[CONF_OUTPUT_ID])
-    yield cg.register_component(var, config)
+    await cg.register_component(var, config)
     config.pop(
         CONF_UPDATE_INTERVAL
     )  # drop UPDATE_INTERVAL as it does not apply to the light component
 
-    yield light.register_light(var, config)
-    yield uart.register_uart_device(var, config)
+    await light.register_light(var, config)
+    await uart.register_uart_device(var, config)
 
-    nrst_pin = yield cg.gpio_pin_expression(config[CONF_NRST_PIN])
+    nrst_pin = await cg.gpio_pin_expression(config[CONF_NRST_PIN])
     cg.add(var.set_nrst_pin(nrst_pin))
-    boot0_pin = yield cg.gpio_pin_expression(config[CONF_BOOT0_PIN])
+    boot0_pin = await cg.gpio_pin_expression(config[CONF_BOOT0_PIN])
     cg.add(var.set_boot0_pin(boot0_pin))
 
     cg.add(var.set_leading_edge(config[CONF_LEADING_EDGE]))
@@ -217,5 +217,5 @@ def to_code(config):
             continue
 
         conf = config[key]
-        sens = yield sensor.new_sensor(conf)
+        sens = await sensor.new_sensor(conf)
         cg.add(getattr(var, f"set_{key}_sensor")(sens))
diff --git a/esphome/components/tee501/tee501.cpp b/esphome/components/tee501/tee501.cpp
index 460f446865..dc803be775 100644
--- a/esphome/components/tee501/tee501.cpp
+++ b/esphome/components/tee501/tee501.cpp
@@ -12,7 +12,7 @@ void TEE501Component::setup() {
   this->write(address, 2, false);
   uint8_t identification[9];
   this->read(identification, 9);
-  if (identification[8] != calc_crc8_(identification, 0, 7)) {
+  if (identification[8] != crc8(identification, 8, 0xFF, 0x31, true)) {
     this->error_code_ = CRC_CHECK_FAILED;
     this->mark_failed();
     return;
@@ -45,7 +45,7 @@ void TEE501Component::update() {
   this->set_timeout(50, [this]() {
     uint8_t i2c_response[3];
     this->read(i2c_response, 3);
-    if (i2c_response[2] != calc_crc8_(i2c_response, 0, 1)) {
+    if (i2c_response[2] != crc8(i2c_response, 2, 0xFF, 0x31, true)) {
       this->error_code_ = CRC_CHECK_FAILED;
       this->status_set_warning();
       return;
@@ -62,24 +62,5 @@ void TEE501Component::update() {
   });
 }
 
-unsigned char TEE501Component::calc_crc8_(const unsigned char buf[], unsigned char from, unsigned char to) {
-  unsigned char crc_val = 0xFF;
-  unsigned char i = 0;
-  unsigned char j = 0;
-  for (i = from; i <= to; i++) {
-    int cur_val = buf[i];
-    for (j = 0; j < 8; j++) {
-      if (((crc_val ^ cur_val) & 0x80) != 0)  // If MSBs are not equal
-      {
-        crc_val = ((crc_val << 1) ^ 0x31);
-      } else {
-        crc_val = (crc_val << 1);
-      }
-      cur_val = cur_val << 1;
-    }
-  }
-  return crc_val;
-}
-
 }  // namespace tee501
 }  // namespace esphome
diff --git a/esphome/components/tee501/tee501.h b/esphome/components/tee501/tee501.h
index fc655e58c9..2437ac92eb 100644
--- a/esphome/components/tee501/tee501.h
+++ b/esphome/components/tee501/tee501.h
@@ -1,8 +1,8 @@
 #pragma once
 
-#include "esphome/core/component.h"
-#include "esphome/components/sensor/sensor.h"
 #include "esphome/components/i2c/i2c.h"
+#include "esphome/components/sensor/sensor.h"
+#include "esphome/core/component.h"
 
 namespace esphome {
 namespace tee501 {
@@ -16,8 +16,6 @@ class TEE501Component : public sensor::Sensor, public PollingComponent, public i
   void update() override;
 
  protected:
-  unsigned char calc_crc8_(const unsigned char buf[], unsigned char from, unsigned char to);
-
   enum ErrorCode { NONE = 0, COMMUNICATION_FAILED, CRC_CHECK_FAILED } error_code_{NONE};
 };
 
diff --git a/esphome/components/ufire_ec/ufire_ec.cpp b/esphome/components/ufire_ec/ufire_ec.cpp
index 364a133776..9e0055a2cc 100644
--- a/esphome/components/ufire_ec/ufire_ec.cpp
+++ b/esphome/components/ufire_ec/ufire_ec.cpp
@@ -105,9 +105,9 @@ void UFireECComponent::dump_config() {
   ESP_LOGCONFIG(TAG, "uFire-EC");
   LOG_I2C_DEVICE(this)
   LOG_UPDATE_INTERVAL(this)
-  LOG_SENSOR("  ", "EC Sensor", this->ec_sensor_)
-  LOG_SENSOR("  ", "Temperature Sensor", this->temperature_sensor_)
-  LOG_SENSOR("  ", "Temperature Sensor external", this->temperature_sensor_external_)
+  LOG_SENSOR("  ", "EC Sensor", this->ec_sensor_);
+  LOG_SENSOR("  ", "Temperature Sensor", this->temperature_sensor_);
+  LOG_SENSOR("  ", "Temperature Sensor external", this->temperature_sensor_external_);
   ESP_LOGCONFIG(TAG,
                 "  Temperature Compensation: %f\n"
                 "  Temperature Coefficient: %f",
diff --git a/esphome/components/ufire_ise/ufire_ise.cpp b/esphome/components/ufire_ise/ufire_ise.cpp
index 503d993fb7..9e0e7e265d 100644
--- a/esphome/components/ufire_ise/ufire_ise.cpp
+++ b/esphome/components/ufire_ise/ufire_ise.cpp
@@ -142,9 +142,9 @@ void UFireISEComponent::dump_config() {
   ESP_LOGCONFIG(TAG, "uFire-ISE");
   LOG_I2C_DEVICE(this)
   LOG_UPDATE_INTERVAL(this)
-  LOG_SENSOR("  ", "PH Sensor", this->ph_sensor_)
-  LOG_SENSOR("  ", "Temperature Sensor", this->temperature_sensor_)
-  LOG_SENSOR("  ", "Temperature Sensor external", this->temperature_sensor_external_)
+  LOG_SENSOR("  ", "PH Sensor", this->ph_sensor_);
+  LOG_SENSOR("  ", "Temperature Sensor", this->temperature_sensor_);
+  LOG_SENSOR("  ", "Temperature Sensor external", this->temperature_sensor_external_);
 }
 
 }  // namespace ufire_ise
diff --git a/esphome/components/valve/__init__.py b/esphome/components/valve/__init__.py
index 53254068af..8185bd6ea2 100644
--- a/esphome/components/valve/__init__.py
+++ b/esphome/components/valve/__init__.py
@@ -202,9 +202,9 @@ async def valve_stop_to_code(config, action_id, template_arg, args):
 
 
 @automation.register_action("valve.toggle", ToggleAction, VALVE_ACTION_SCHEMA)
-def valve_toggle_to_code(config, action_id, template_arg, args):
-    paren = yield cg.get_variable(config[CONF_ID])
-    yield cg.new_Pvariable(action_id, template_arg, paren)
+async def valve_toggle_to_code(config, action_id, template_arg, args):
+    paren = await cg.get_variable(config[CONF_ID])
+    return cg.new_Pvariable(action_id, template_arg, paren)
 
 
 VALVE_CONTROL_ACTION_SCHEMA = cv.Schema(
diff --git a/esphome/components/web_server/web_server.cpp b/esphome/components/web_server/web_server.cpp
index 399b8785ae..290992b096 100644
--- a/esphome/components/web_server/web_server.cpp
+++ b/esphome/components/web_server/web_server.cpp
@@ -507,14 +507,37 @@ void WebServer::handle_switch_request(AsyncWebServerRequest *request, const UrlM
       auto detail = get_request_detail(request);
       std::string data = this->switch_json(obj, obj->state, detail);
       request->send(200, "application/json", data.c_str());
-    } else if (match.method_equals("toggle")) {
-      this->defer([obj]() { obj->toggle(); });
-      request->send(200);
+      return;
+    }
+
+    // Handle action methods with single defer and response
+    enum SwitchAction { NONE, TOGGLE, TURN_ON, TURN_OFF };
+    SwitchAction action = NONE;
+
+    if (match.method_equals("toggle")) {
+      action = TOGGLE;
     } else if (match.method_equals("turn_on")) {
-      this->defer([obj]() { obj->turn_on(); });
-      request->send(200);
+      action = TURN_ON;
     } else if (match.method_equals("turn_off")) {
-      this->defer([obj]() { obj->turn_off(); });
+      action = TURN_OFF;
+    }
+
+    if (action != NONE) {
+      this->defer([obj, action]() {
+        switch (action) {
+          case TOGGLE:
+            obj->toggle();
+            break;
+          case TURN_ON:
+            obj->turn_on();
+            break;
+          case TURN_OFF:
+            obj->turn_off();
+            break;
+          default:
+            break;
+        }
+      });
       request->send(200);
     } else {
       request->send(404);
@@ -1332,14 +1355,37 @@ void WebServer::handle_lock_request(AsyncWebServerRequest *request, const UrlMat
       auto detail = get_request_detail(request);
       std::string data = this->lock_json(obj, obj->state, detail);
       request->send(200, "application/json", data.c_str());
-    } else if (match.method_equals("lock")) {
-      this->defer([obj]() { obj->lock(); });
-      request->send(200);
+      return;
+    }
+
+    // Handle action methods with single defer and response
+    enum LockAction { NONE, LOCK, UNLOCK, OPEN };
+    LockAction action = NONE;
+
+    if (match.method_equals("lock")) {
+      action = LOCK;
     } else if (match.method_equals("unlock")) {
-      this->defer([obj]() { obj->unlock(); });
-      request->send(200);
+      action = UNLOCK;
     } else if (match.method_equals("open")) {
-      this->defer([obj]() { obj->open(); });
+      action = OPEN;
+    }
+
+    if (action != NONE) {
+      this->defer([obj, action]() {
+        switch (action) {
+          case LOCK:
+            obj->lock();
+            break;
+          case UNLOCK:
+            obj->unlock();
+            break;
+          case OPEN:
+            obj->open();
+            break;
+          default:
+            break;
+        }
+      });
       request->send(200);
     } else {
       request->send(404);
diff --git a/esphome/core/application.cpp b/esphome/core/application.cpp
index d2d47fe171..dc745a2a46 100644
--- a/esphome/core/application.cpp
+++ b/esphome/core/application.cpp
@@ -256,30 +256,79 @@ void Application::run_powerdown_hooks() {
 void Application::teardown_components(uint32_t timeout_ms) {
   uint32_t start_time = millis();
 
-  // Copy all components in reverse order using reverse iterators
+  // Use a StaticVector instead of std::vector to avoid heap allocation
+  // since we know the actual size at compile time
+  StaticVector<Component *, ESPHOME_COMPONENT_COUNT> pending_components;
+
+  // Copy all components in reverse order
   // Reverse order matches the behavior of run_safe_shutdown_hooks() above and ensures
   // components are torn down in the opposite order of their setup_priority (which is
   // used to sort components during Application::setup())
-  std::vector<Component *> pending_components(this->components_.rbegin(), this->components_.rend());
+  size_t num_components = this->components_.size();
+  for (size_t i = 0; i < num_components; ++i) {
+    pending_components[i] = this->components_[num_components - 1 - i];
+  }
 
   uint32_t now = start_time;
-  while (!pending_components.empty() && (now - start_time) < timeout_ms) {
+  size_t pending_count = num_components;
+
+  // Teardown Algorithm
+  // ==================
+  // We iterate through pending components, calling teardown() on each.
+  // Components that return false (need more time) are copied forward
+  // in the array. Components that return true (finished) are skipped.
+  //
+  // The compaction happens in-place during iteration:
+  //   - still_pending tracks the write position (where to put next pending component)
+  //   - i tracks the read position (which component we're testing)
+  //   - When teardown() returns false, we copy component[i] to component[still_pending]
+  //   - When teardown() returns true, we just skip it (don't increment still_pending)
+  //
+  // Example with 4 components where B can teardown immediately:
+  //
+  // Start:
+  //   pending_components: [A, B, C, D]
+  //   pending_count: 4    ^----------^
+  //
+  // Iteration 1:
+  //   i=0: A needs more time → keep at pos 0 (no copy needed)
+  //   i=1: B finished → skip
+  //   i=2: C needs more time → copy to pos 1
+  //   i=3: D needs more time → copy to pos 2
+  //
+  // After iteration 1:
+  //   pending_components: [A, C, D | D]
+  //   pending_count: 3    ^--------^
+  //
+  // Iteration 2:
+  //   i=0: A finished → skip
+  //   i=1: C needs more time → copy to pos 0
+  //   i=2: D finished → skip
+  //
+  // After iteration 2:
+  //   pending_components: [C | C, D, D]  (positions 1-3 have old values)
+  //   pending_count: 1    ^--^
+
+  while (pending_count > 0 && (now - start_time) < timeout_ms) {
     // Feed watchdog during teardown to prevent triggering
     this->feed_wdt(now);
 
-    // Use iterator to safely erase elements
-    for (auto it = pending_components.begin(); it != pending_components.end();) {
-      if ((*it)->teardown()) {
-        // Component finished teardown, erase it
-        it = pending_components.erase(it);
-      } else {
-        // Component still needs time
-        ++it;
+    // Process components and compact the array, keeping only those still pending
+    size_t still_pending = 0;
+    for (size_t i = 0; i < pending_count; ++i) {
+      if (!pending_components[i]->teardown()) {
+        // Component still needs time, copy it forward
+        if (still_pending != i) {
+          pending_components[still_pending] = pending_components[i];
+        }
+        ++still_pending;
       }
+      // Component finished teardown, skip it (don't increment still_pending)
     }
+    pending_count = still_pending;
 
     // Give some time for I/O operations if components are still pending
-    if (!pending_components.empty()) {
+    if (pending_count > 0) {
       this->yield_with_select_(1);
     }
 
@@ -287,11 +336,11 @@ void Application::teardown_components(uint32_t timeout_ms) {
     now = millis();
   }
 
-  if (!pending_components.empty()) {
+  if (pending_count > 0) {
     // Note: At this point, connections are either disconnected or in a bad state,
     // so this warning will only appear via serial rather than being transmitted to clients
-    for (auto *component : pending_components) {
-      ESP_LOGW(TAG, "%s did not complete teardown within %" PRIu32 " ms", component->get_component_source(),
+    for (size_t i = 0; i < pending_count; ++i) {
+      ESP_LOGW(TAG, "%s did not complete teardown within %" PRIu32 " ms", pending_components[i]->get_component_source(),
                timeout_ms);
     }
   }
diff --git a/esphome/core/application.h b/esphome/core/application.h
index 4120afff53..9cb2a4c638 100644
--- a/esphome/core/application.h
+++ b/esphome/core/application.h
@@ -10,6 +10,7 @@
 #include "esphome/core/helpers.h"
 #include "esphome/core/preferences.h"
 #include "esphome/core/scheduler.h"
+#include "esphome/core/string_ref.h"
 
 #ifdef USE_DEVICES
 #include "esphome/core/device.h"
@@ -248,6 +249,8 @@ class Application {
   bool is_name_add_mac_suffix_enabled() const { return this->name_add_mac_suffix_; }
 
   std::string get_compilation_time() const { return this->compilation_time_; }
+  /// Get the compilation time as StringRef (for API usage)
+  StringRef get_compilation_time_ref() const { return StringRef(this->compilation_time_); }
 
   /// Get the cached time in milliseconds from when the current component started its loop execution
   inline uint32_t IRAM_ATTR HOT get_loop_component_start_time() const { return this->loop_component_start_time_; }
diff --git a/esphome/core/entity_base.cpp b/esphome/core/entity_base.cpp
index 2ea9c77a3e..411a877bbf 100644
--- a/esphome/core/entity_base.cpp
+++ b/esphome/core/entity_base.cpp
@@ -1,6 +1,7 @@
 #include "esphome/core/entity_base.h"
 #include "esphome/core/application.h"
 #include "esphome/core/helpers.h"
+#include "esphome/core/string_ref.h"
 
 namespace esphome {
 
@@ -50,13 +51,18 @@ std::string EntityBase::get_object_id() const {
   if (!this->flags_.has_own_name && App.is_name_add_mac_suffix_enabled()) {
     // `App.get_friendly_name()` is dynamic.
     return str_sanitize(str_snake_case(App.get_friendly_name()));
-  } else {
-    // `App.get_friendly_name()` is constant.
-    if (this->object_id_c_str_ == nullptr) {
-      return "";
-    }
-    return this->object_id_c_str_;
   }
+  // `App.get_friendly_name()` is constant.
+  return this->object_id_c_str_ == nullptr ? "" : this->object_id_c_str_;
+}
+StringRef EntityBase::get_object_id_ref_for_api_() const {
+  static constexpr auto EMPTY_STRING = StringRef::from_lit("");
+  // Return empty for dynamic case (MAC suffix)
+  if (!this->flags_.has_own_name && App.is_name_add_mac_suffix_enabled()) {
+    return EMPTY_STRING;
+  }
+  // For static case, return the string or empty if null
+  return this->object_id_c_str_ == nullptr ? EMPTY_STRING : StringRef(this->object_id_c_str_);
 }
 void EntityBase::set_object_id(const char *object_id) {
   this->object_id_c_str_ = object_id;
diff --git a/esphome/core/entity_base.h b/esphome/core/entity_base.h
index e60e0728bc..68163ce8c3 100644
--- a/esphome/core/entity_base.h
+++ b/esphome/core/entity_base.h
@@ -12,6 +12,11 @@
 
 namespace esphome {
 
+// Forward declaration for friend access
+namespace api {
+class APIConnection;
+}  // namespace api
+
 enum EntityCategory : uint8_t {
   ENTITY_CATEGORY_NONE = 0,
   ENTITY_CATEGORY_CONFIG = 1,
@@ -81,6 +86,12 @@ class EntityBase {
   void set_has_state(bool state) { this->flags_.has_state = state; }
 
  protected:
+  friend class api::APIConnection;
+
+  // Get object_id as StringRef when it's static (for API usage)
+  // Returns empty StringRef if object_id is dynamic (needs allocation)
+  StringRef get_object_id_ref_for_api_() const;
+
   /// The hash_base() function has been deprecated. It is kept in this
   /// class for now, to prevent external components from not compiling.
   virtual uint32_t hash_base() { return 0L; }
diff --git a/esphome/core/helpers.cpp b/esphome/core/helpers.cpp
index e84f5a7317..44e9193994 100644
--- a/esphome/core/helpers.cpp
+++ b/esphome/core/helpers.cpp
@@ -41,17 +41,28 @@ static const uint16_t CRC16_1021_BE_LUT_H[] = {0x0000, 0x1231, 0x2462, 0x3653, 0
 
 // Mathematics
 
-uint8_t crc8(const uint8_t *data, uint8_t len) {
-  uint8_t crc = 0;
-
+uint8_t crc8(const uint8_t *data, uint8_t len, uint8_t crc, uint8_t poly, bool msb_first) {
   while ((len--) != 0u) {
     uint8_t inbyte = *data++;
-    for (uint8_t i = 8; i != 0u; i--) {
-      bool mix = (crc ^ inbyte) & 0x01;
-      crc >>= 1;
-      if (mix)
-        crc ^= 0x8C;
-      inbyte >>= 1;
+    if (msb_first) {
+      // MSB first processing (for polynomials like 0x31, 0x07)
+      crc ^= inbyte;
+      for (uint8_t i = 8; i != 0u; i--) {
+        if (crc & 0x80) {
+          crc = (crc << 1) ^ poly;
+        } else {
+          crc <<= 1;
+        }
+      }
+    } else {
+      // LSB first processing (default for Dallas/Maxim 0x8C)
+      for (uint8_t i = 8; i != 0u; i--) {
+        bool mix = (crc ^ inbyte) & 0x01;
+        crc >>= 1;
+        if (mix)
+          crc ^= poly;
+        inbyte >>= 1;
+      }
     }
   }
   return crc;
diff --git a/esphome/core/helpers.h b/esphome/core/helpers.h
index b5fe59c4fd..53ec7a2a5a 100644
--- a/esphome/core/helpers.h
+++ b/esphome/core/helpers.h
@@ -145,8 +145,8 @@ template<typename T, typename U> T remap(U value, U min, U max, T min_out, T max
   return (value - min) * (max_out - min_out) / (max - min) + min_out;
 }
 
-/// Calculate a CRC-8 checksum of \p data with size \p len using the CRC-8-Dallas/Maxim polynomial.
-uint8_t crc8(const uint8_t *data, uint8_t len);
+/// Calculate a CRC-8 checksum of \p data with size \p len.
+uint8_t crc8(const uint8_t *data, uint8_t len, uint8_t crc = 0x00, uint8_t poly = 0x8C, bool msb_first = false);
 
 /// Calculate a CRC-16 checksum of \p data with size \p len.
 uint16_t crc16(const uint8_t *data, uint16_t len, uint16_t crc = 0xffff, uint16_t reverse_poly = 0xa001,
diff --git a/platformio.ini b/platformio.ini
index d9f2f879ec..47fc5205bc 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -357,6 +357,19 @@ build_flags =
     ${common:esp32-idf.build_flags}
     ${flags:runtime.build_flags}
     -DUSE_ESP32_VARIANT_ESP32C6
+build_unflags =
+    ${common.build_unflags}
+
+[env:esp32c6-idf-tidy]
+extends = common:esp32-idf
+board = esp32-c6-devkitc-1
+board_build.esp-idf.sdkconfig_path = .temp/sdkconfig-esp32c6-idf-tidy
+build_flags =
+    ${common:esp32-idf.build_flags}
+    ${flags:clangtidy.build_flags}
+    -DUSE_ESP32_VARIANT_ESP32C6
+build_unflags =
+    ${common.build_unflags}
 
 ;;;;;;;; ESP32-S2 ;;;;;;;;
 
diff --git a/requirements.txt b/requirements.txt
index 0675115c02..2665211381 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ esphome-dashboard==20250814.0
 aioesphomeapi==39.0.0
 zeroconf==0.147.0
 puremagic==1.30
-ruamel.yaml==0.18.14 # dashboard_import
+ruamel.yaml==0.18.15 # dashboard_import
 esphome-glyphsets==0.2.0
 pillow==10.4.0
 cairosvg==2.8.2
diff --git a/tests/components/homeassistant/test-tag-scanned.esp32-idf.yaml b/tests/components/homeassistant/test-tag-scanned.esp32-idf.yaml
new file mode 100644
index 0000000000..ef148174d7
--- /dev/null
+++ b/tests/components/homeassistant/test-tag-scanned.esp32-idf.yaml
@@ -0,0 +1,14 @@
+wifi:
+  ssid: MySSID
+  password: password1
+
+api:
+
+esphome:
+  on_boot:
+    then:
+      - homeassistant.tag_scanned: 'test_tag_123'
+      - homeassistant.tag_scanned:
+          tag: 'another_tag'
+      - homeassistant.tag_scanned:
+          tag: !lambda 'return "dynamic_tag";'
diff --git a/tests/integration/fixtures/crc8_helper.yaml b/tests/integration/fixtures/crc8_helper.yaml
new file mode 100644
index 0000000000..e97e23eab0
--- /dev/null
+++ b/tests/integration/fixtures/crc8_helper.yaml
@@ -0,0 +1,17 @@
+esphome:
+  name: crc8-helper-test
+
+host:
+
+api:
+
+logger:
+  level: INFO
+
+external_components:
+  - source:
+      type: local
+      path: EXTERNAL_COMPONENT_PATH
+    components: [crc8_test_component]
+
+crc8_test_component:
diff --git a/tests/integration/fixtures/external_components/crc8_test_component/__init__.py b/tests/integration/fixtures/external_components/crc8_test_component/__init__.py
new file mode 100644
index 0000000000..6032b0861f
--- /dev/null
+++ b/tests/integration/fixtures/external_components/crc8_test_component/__init__.py
@@ -0,0 +1,17 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.const import CONF_ID
+
+crc8_test_component_ns = cg.esphome_ns.namespace("crc8_test_component")
+CRC8TestComponent = crc8_test_component_ns.class_("CRC8TestComponent", cg.Component)
+
+CONFIG_SCHEMA = cv.Schema(
+    {
+        cv.GenerateID(): cv.declare_id(CRC8TestComponent),
+    }
+).extend(cv.COMPONENT_SCHEMA)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    await cg.register_component(var, config)
diff --git a/tests/integration/fixtures/external_components/crc8_test_component/crc8_test_component.cpp b/tests/integration/fixtures/external_components/crc8_test_component/crc8_test_component.cpp
new file mode 100644
index 0000000000..6c46af19fd
--- /dev/null
+++ b/tests/integration/fixtures/external_components/crc8_test_component/crc8_test_component.cpp
@@ -0,0 +1,170 @@
+#include "crc8_test_component.h"
+#include "esphome/core/helpers.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace crc8_test_component {
+
+static const char *const TAG = "crc8_test";
+
+void CRC8TestComponent::setup() {
+  ESP_LOGI(TAG, "CRC8 Helper Function Integration Test Starting");
+
+  // Run all test suites
+  test_crc8_dallas_maxim();
+  test_crc8_sensirion_style();
+  test_crc8_pec_style();
+  test_crc8_parameter_equivalence();
+  test_crc8_edge_cases();
+  test_component_compatibility();
+
+  ESP_LOGI(TAG, "CRC8 Integration Test Complete");
+}
+
+void CRC8TestComponent::test_crc8_dallas_maxim() {
+  ESP_LOGI(TAG, "Testing Dallas/Maxim CRC8 (default parameters)");
+
+  // Test vectors for Dallas/Maxim CRC8 (polynomial 0x8C, LSB-first, init 0x00)
+  const uint8_t test1[] = {0x01};
+  const uint8_t test2[] = {0xFF};
+  const uint8_t test3[] = {0x12, 0x34};
+  const uint8_t test4[] = {0xAA, 0xBB, 0xCC};
+  const uint8_t test5[] = {0x01, 0x02, 0x03, 0x04, 0x05};
+
+  bool all_passed = true;
+  all_passed &= verify_crc8("Dallas [0x01]", test1, sizeof(test1), 0x5E);
+  all_passed &= verify_crc8("Dallas [0xFF]", test2, sizeof(test2), 0x35);
+  all_passed &= verify_crc8("Dallas [0x12, 0x34]", test3, sizeof(test3), 0xA2);
+  all_passed &= verify_crc8("Dallas [0xAA, 0xBB, 0xCC]", test4, sizeof(test4), 0xD4);
+  all_passed &= verify_crc8("Dallas [0x01...0x05]", test5, sizeof(test5), 0x2A);
+
+  log_test_result("Dallas/Maxim CRC8", all_passed);
+}
+
+void CRC8TestComponent::test_crc8_sensirion_style() {
+  ESP_LOGI(TAG, "Testing Sensirion CRC8 (0x31 poly, MSB-first, init 0xFF)");
+
+  const uint8_t test1[] = {0x00};
+  const uint8_t test2[] = {0x01};
+  const uint8_t test3[] = {0xFF};
+  const uint8_t test4[] = {0x12, 0x34};
+  const uint8_t test5[] = {0xBE, 0xEF};
+
+  bool all_passed = true;
+  all_passed &= verify_crc8("Sensirion [0x00]", test1, sizeof(test1), 0xAC, 0xFF, 0x31, true);
+  all_passed &= verify_crc8("Sensirion [0x01]", test2, sizeof(test2), 0x9D, 0xFF, 0x31, true);
+  all_passed &= verify_crc8("Sensirion [0xFF]", test3, sizeof(test3), 0x00, 0xFF, 0x31, true);
+  all_passed &= verify_crc8("Sensirion [0x12, 0x34]", test4, sizeof(test4), 0x37, 0xFF, 0x31, true);
+  all_passed &= verify_crc8("Sensirion [0xBE, 0xEF]", test5, sizeof(test5), 0x92, 0xFF, 0x31, true);
+
+  log_test_result("Sensirion CRC8", all_passed);
+}
+
+void CRC8TestComponent::test_crc8_pec_style() {
+  ESP_LOGI(TAG, "Testing PEC CRC8 (0x07 poly, MSB-first, init 0x00)");
+
+  const uint8_t test1[] = {0x00};
+  const uint8_t test2[] = {0x01};
+  const uint8_t test3[] = {0xFF};
+  const uint8_t test4[] = {0x12, 0x34};
+  const uint8_t test5[] = {0xAA, 0xBB};
+
+  bool all_passed = true;
+  all_passed &= verify_crc8("PEC [0x00]", test1, sizeof(test1), 0x00, 0x00, 0x07, true);
+  all_passed &= verify_crc8("PEC [0x01]", test2, sizeof(test2), 0x07, 0x00, 0x07, true);
+  all_passed &= verify_crc8("PEC [0xFF]", test3, sizeof(test3), 0xF3, 0x00, 0x07, true);
+  all_passed &= verify_crc8("PEC [0x12, 0x34]", test4, sizeof(test4), 0xF1, 0x00, 0x07, true);
+  all_passed &= verify_crc8("PEC [0xAA, 0xBB]", test5, sizeof(test5), 0xB2, 0x00, 0x07, true);
+
+  log_test_result("PEC CRC8", all_passed);
+}
+
+void CRC8TestComponent::test_crc8_parameter_equivalence() {
+  ESP_LOGI(TAG, "Testing parameter equivalence");
+
+  const uint8_t test_data[] = {0x12, 0x34, 0x56, 0x78};
+
+  // Test that default parameters work as expected
+  uint8_t default_result = crc8(test_data, sizeof(test_data));
+  uint8_t explicit_result = crc8(test_data, sizeof(test_data), 0x00, 0x8C, false);
+
+  bool passed = (default_result == explicit_result);
+  if (!passed) {
+    ESP_LOGE(TAG, "Parameter equivalence FAILED: default=0x%02X, explicit=0x%02X", default_result, explicit_result);
+  }
+
+  log_test_result("Parameter equivalence", passed);
+}
+
+void CRC8TestComponent::test_crc8_edge_cases() {
+  ESP_LOGI(TAG, "Testing edge cases");
+
+  bool all_passed = true;
+
+  // Empty array test
+  const uint8_t empty[] = {};
+  uint8_t empty_result = crc8(empty, 0);
+  bool empty_passed = (empty_result == 0x00);  // Should return init value
+  if (!empty_passed) {
+    ESP_LOGE(TAG, "Empty array test FAILED: expected 0x00, got 0x%02X", empty_result);
+  }
+  all_passed &= empty_passed;
+
+  // Single byte tests
+  const uint8_t single_zero[] = {0x00};
+  const uint8_t single_ff[] = {0xFF};
+  all_passed &= verify_crc8("Single [0x00]", single_zero, 1, 0x00);
+  all_passed &= verify_crc8("Single [0xFF]", single_ff, 1, 0x35);
+
+  log_test_result("Edge cases", all_passed);
+}
+
+void CRC8TestComponent::test_component_compatibility() {
+  ESP_LOGI(TAG, "Testing component compatibility");
+
+  // Test specific component use cases
+  bool all_passed = true;
+
+  // AGS10-style data (Sensirion CRC8)
+  const uint8_t ags10_data[] = {0x12, 0x34, 0x56};
+  uint8_t ags10_result = crc8(ags10_data, sizeof(ags10_data), 0xFF, 0x31, true);
+  ESP_LOGI(TAG, "AGS10-style CRC8: 0x%02X", ags10_result);
+
+  // LC709203F-style data (PEC CRC8)
+  const uint8_t lc_data[] = {0xAA, 0xBB};
+  uint8_t lc_result = crc8(lc_data, sizeof(lc_data), 0x00, 0x07, true);
+  ESP_LOGI(TAG, "LC709203F-style CRC8: 0x%02X", lc_result);
+
+  // DallasTemperature-style data (Dallas CRC8)
+  const uint8_t dallas_data[] = {0x28, 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC};
+  uint8_t dallas_result = crc8(dallas_data, sizeof(dallas_data));
+  ESP_LOGI(TAG, "Dallas-style CRC8: 0x%02X", dallas_result);
+
+  all_passed = true;  // These are just demonstration tests
+  log_test_result("Component compatibility", all_passed);
+}
+
+bool CRC8TestComponent::verify_crc8(const char *test_name, const uint8_t *data, uint8_t len, uint8_t expected,
+                                    uint8_t crc, uint8_t poly, bool msb_first) {
+  uint8_t result = esphome::crc8(data, len, crc, poly, msb_first);
+  bool passed = (result == expected);
+
+  if (passed) {
+    ESP_LOGI(TAG, "%s: PASS (0x%02X)", test_name, result);
+  } else {
+    ESP_LOGE(TAG, "%s: FAIL - expected 0x%02X, got 0x%02X", test_name, expected, result);
+  }
+
+  return passed;
+}
+
+void CRC8TestComponent::log_test_result(const char *test_name, bool passed) {
+  if (passed) {
+    ESP_LOGI(TAG, "%s: ALL TESTS PASSED", test_name);
+  } else {
+    ESP_LOGE(TAG, "%s: SOME TESTS FAILED", test_name);
+  }
+}
+
+}  // namespace crc8_test_component
+}  // namespace esphome
diff --git a/tests/integration/fixtures/external_components/crc8_test_component/crc8_test_component.h b/tests/integration/fixtures/external_components/crc8_test_component/crc8_test_component.h
new file mode 100644
index 0000000000..3b8847259c
--- /dev/null
+++ b/tests/integration/fixtures/external_components/crc8_test_component/crc8_test_component.h
@@ -0,0 +1,29 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/core/helpers.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace crc8_test_component {
+
+class CRC8TestComponent : public Component {
+ public:
+  void setup() override;
+
+ private:
+  void test_crc8_dallas_maxim();
+  void test_crc8_sensirion_style();
+  void test_crc8_pec_style();
+  void test_crc8_parameter_equivalence();
+  void test_crc8_edge_cases();
+  void test_component_compatibility();
+  void test_old_vs_new_implementations();
+
+  void log_test_result(const char *test_name, bool passed);
+  bool verify_crc8(const char *test_name, const uint8_t *data, uint8_t len, uint8_t expected, uint8_t crc = 0x00,
+                   uint8_t poly = 0x8C, bool msb_first = false);
+};
+
+}  // namespace crc8_test_component
+}  // namespace esphome
diff --git a/tests/integration/test_crc8_helper.py b/tests/integration/test_crc8_helper.py
new file mode 100644
index 0000000000..ffe6244598
--- /dev/null
+++ b/tests/integration/test_crc8_helper.py
@@ -0,0 +1,100 @@
+"""Integration test for CRC8 helper function."""
+
+from __future__ import annotations
+
+import asyncio
+from pathlib import Path
+
+import pytest
+
+from .types import APIClientConnectedFactory, RunCompiledFunction
+
+
+@pytest.mark.asyncio
+async def test_crc8_helper(
+    yaml_config: str,
+    run_compiled: RunCompiledFunction,
+    api_client_connected: APIClientConnectedFactory,
+) -> None:
+    """Test the CRC8 helper function through integration testing."""
+    # Get the path to the external components directory
+    external_components_path = str(
+        Path(__file__).parent / "fixtures" / "external_components"
+    )
+
+    # Replace the placeholder in the YAML config with the actual path
+    yaml_config = yaml_config.replace(
+        "EXTERNAL_COMPONENT_PATH", external_components_path
+    )
+
+    # Track test completion with asyncio.Event
+    test_complete = asyncio.Event()
+
+    # Track test results
+    test_results = {
+        "dallas_maxim": False,
+        "sensirion": False,
+        "pec": False,
+        "parameter_equivalence": False,
+        "edge_cases": False,
+        "component_compatibility": False,
+        "setup_started": False,
+    }
+
+    def on_log_line(line):
+        """Process log lines to track test progress and results."""
+        # Track test start
+        if "CRC8 Helper Function Integration Test Starting" in line:
+            test_results["setup_started"] = True
+
+        # Track test completion
+        elif "CRC8 Integration Test Complete" in line:
+            test_complete.set()
+
+        # Track individual test results
+        elif "ALL TESTS PASSED" in line:
+            if "Dallas/Maxim CRC8" in line:
+                test_results["dallas_maxim"] = True
+            elif "Sensirion CRC8" in line:
+                test_results["sensirion"] = True
+            elif "PEC CRC8" in line:
+                test_results["pec"] = True
+            elif "Parameter equivalence" in line:
+                test_results["parameter_equivalence"] = True
+            elif "Edge cases" in line:
+                test_results["edge_cases"] = True
+            elif "Component compatibility" in line:
+                test_results["component_compatibility"] = True
+
+        # Log failures for debugging
+        elif "TEST FAILED:" in line or "SUBTEST FAILED:" in line:
+            print(f"CRC8 Test Failure: {line}")
+
+    # Compile and run the test
+    async with (
+        run_compiled(yaml_config, line_callback=on_log_line),
+        api_client_connected() as client,
+    ):
+        # Verify device info
+        device_info = await client.device_info()
+        assert device_info is not None
+        assert device_info.name == "crc8-helper-test"
+
+        # Wait for tests to complete with timeout
+        try:
+            await asyncio.wait_for(test_complete.wait(), timeout=5.0)
+        except TimeoutError:
+            pytest.fail("CRC8 integration test timed out after 5 seconds")
+
+        # Verify all tests passed
+        assert test_results["setup_started"], "CRC8 test setup never started"
+        assert test_results["dallas_maxim"], "Dallas/Maxim CRC8 test failed"
+        assert test_results["sensirion"], "Sensirion CRC8 test failed"
+        assert test_results["pec"], "PEC CRC8 test failed"
+        assert test_results["parameter_equivalence"], (
+            "Parameter equivalence test failed"
+        )
+        assert test_results["edge_cases"], "Edge cases test failed"
+        assert test_results["component_compatibility"], (
+            "Component compatibility test failed"
+        )