tidy

This reverts commit 871c5ddb4e.

esphome/components/alarm_control_panel/alarm_control_panel.cpp

@@ -1,6 +1,8 @@
-#include <utility>
-
 #include "alarm_control_panel.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
+
+#include <utility>
 
 #include "esphome/core/application.h"
 #include "esphome/core/helpers.h"
@@ -34,6 +36,9 @@ void AlarmControlPanel::publish_state(AlarmControlPanelState state) {
              LOG_STR_ARG(alarm_control_panel_state_to_string(prev_state)));
     this->current_state_ = state;
     this->state_callback_.call();
+#if defined(USE_ALARM_CONTROL_PANEL) && defined(USE_CONTROLLER_REGISTRY)
+    ControllerRegistry::notify_alarm_control_panel_update(this);
+#endif
     if (state == ACP_STATE_TRIGGERED) {
       this->triggered_callback_.call();
     } else if (state == ACP_STATE_ARMING) {

esphome/components/api/__init__.py

@@ -244,6 +244,9 @@ async def to_code(config):
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
 
+    # Track controller registration for StaticVector sizing
+    CORE.register_controller()
+
     cg.add(var.set_port(config[CONF_PORT]))
     if config[CONF_PASSWORD]:
         cg.add_define("USE_API_PASSWORD")

esphome/components/api/api_connection.cpp

@@ -1294,11 +1294,11 @@ void APIConnection::alarm_control_panel_command(const AlarmControlPanelCommandRe
 #endif
 
 #ifdef USE_EVENT
-void APIConnection::send_event(event::Event *event, const std::string &event_type) {
-  this->schedule_message_(event, MessageCreator(event_type), EventResponse::MESSAGE_TYPE,
-                          EventResponse::ESTIMATED_SIZE);
+void APIConnection::send_event(event::Event *event, const char *event_type) {
+  this->send_message_smart_(event, MessageCreator(event_type), EventResponse::MESSAGE_TYPE,
+                            EventResponse::ESTIMATED_SIZE);
 }
-uint16_t APIConnection::try_send_event_response(event::Event *event, const std::string &event_type, APIConnection *conn,
+uint16_t APIConnection::try_send_event_response(event::Event *event, const char *event_type, APIConnection *conn,
                                                 uint32_t remaining_size, bool is_single) {
   EventResponse resp;
   resp.set_event_type(StringRef(event_type));
@@ -1648,9 +1648,7 @@ void APIConnection::DeferredBatch::add_item(EntityBase *entity, MessageCreator c
   // O(n) but optimized for RAM and not performance.
   for (auto &item : items) {
     if (item.entity == entity && item.message_type == message_type) {
-      // Clean up old creator before replacing
-      item.creator.cleanup(message_type);
-      // Move assign the new creator
+      // Replace with new creator
       item.creator = std::move(creator);
       return;
     }
@@ -1820,7 +1818,7 @@ void APIConnection::process_batch_() {
 
   // Handle remaining items more efficiently
   if (items_processed < this->deferred_batch_.size()) {
-    // Remove processed items from the beginning with proper cleanup
+    // Remove processed items from the beginning
     this->deferred_batch_.remove_front(items_processed);
     // Reschedule for remaining items
     this->schedule_batch_();
@@ -1833,10 +1831,10 @@ void APIConnection::process_batch_() {
 uint16_t APIConnection::MessageCreator::operator()(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
                                                    bool is_single, uint8_t message_type) const {
 #ifdef USE_EVENT
-  // Special case: EventResponse uses string pointer
+  // Special case: EventResponse uses const char * pointer
   if (message_type == EventResponse::MESSAGE_TYPE) {
     auto *e = static_cast<event::Event *>(entity);
-    return APIConnection::try_send_event_response(e, *data_.string_ptr, conn, remaining_size, is_single);
+    return APIConnection::try_send_event_response(e, data_.const_char_ptr, conn, remaining_size, is_single);
   }
 #endif
 

esphome/components/api/api_connection.h

@@ -177,7 +177,7 @@ class APIConnection final : public APIServerConnection {
 #endif
 
 #ifdef USE_EVENT
-  void send_event(event::Event *event, const std::string &event_type);
+  void send_event(event::Event *event, const char *event_type);
 #endif
 
 #ifdef USE_UPDATE
@@ -450,7 +450,7 @@ class APIConnection final : public APIServerConnection {
                                                     bool is_single);
 #endif
 #ifdef USE_EVENT
-  static uint16_t try_send_event_response(event::Event *event, const std::string &event_type, APIConnection *conn,
+  static uint16_t try_send_event_response(event::Event *event, const char *event_type, APIConnection *conn,
                                           uint32_t remaining_size, bool is_single);
   static uint16_t try_send_event_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size, bool is_single);
 #endif
@@ -508,10 +508,8 @@ class APIConnection final : public APIServerConnection {
     // Constructor for function pointer
     MessageCreator(MessageCreatorPtr ptr) { data_.function_ptr = ptr; }
 
-    // Constructor for string state capture
-    explicit MessageCreator(const std::string &str_value) { data_.string_ptr = new std::string(str_value); }
-
-    // No destructor - cleanup must be called explicitly with message_type
+    // Constructor for const char * (Event types - no allocation needed)
+    explicit MessageCreator(const char *str_value) { data_.const_char_ptr = str_value; }
 
     // Delete copy operations - MessageCreator should only be moved
     MessageCreator(const MessageCreator &other) = delete;
@@ -523,8 +521,6 @@ class APIConnection final : public APIServerConnection {
     // Move assignment
     MessageCreator &operator=(MessageCreator &&other) noexcept {
       if (this != &other) {
-        // IMPORTANT: Caller must ensure cleanup() was called if this contains a string!
-        // In our usage, this happens in add_item() deduplication and vector::erase()
         data_ = other.data_;
         other.data_.function_ptr = nullptr;
       }
@@ -535,20 +531,10 @@ class APIConnection final : public APIServerConnection {
     uint16_t operator()(EntityBase *entity, APIConnection *conn, uint32_t remaining_size, bool is_single,
                         uint8_t message_type) const;
 
-    // Manual cleanup method - must be called before destruction for string types
-    void cleanup(uint8_t message_type) {
-#ifdef USE_EVENT
-      if (message_type == EventResponse::MESSAGE_TYPE && data_.string_ptr != nullptr) {
-        delete data_.string_ptr;
-        data_.string_ptr = nullptr;
-      }
-#endif
-    }
-
    private:
     union Data {
       MessageCreatorPtr function_ptr;
-      std::string *string_ptr;
+      const char *const_char_ptr;
     } data_;  // 4 bytes on 32-bit, 8 bytes on 64-bit - same as before
   };
 
@@ -568,42 +554,24 @@ class APIConnection final : public APIServerConnection {
     std::vector<BatchItem> items;
     uint32_t batch_start_time{0};
 
-   private:
-    // Helper to cleanup items from the beginning
-    void cleanup_items_(size_t count) {
-      for (size_t i = 0; i < count; i++) {
-        items[i].creator.cleanup(items[i].message_type);
-      }
-    }
-
-   public:
     DeferredBatch() {
       // Pre-allocate capacity for typical batch sizes to avoid reallocation
       items.reserve(8);
     }
 
-    ~DeferredBatch() {
-      // Ensure cleanup of any remaining items
-      clear();
-    }
-
     // Add item to the batch
     void add_item(EntityBase *entity, MessageCreator creator, uint8_t message_type, uint8_t estimated_size);
     // Add item to the front of the batch (for high priority messages like ping)
     void add_item_front(EntityBase *entity, MessageCreator creator, uint8_t message_type, uint8_t estimated_size);
 
-    // Clear all items with proper cleanup
+    // Clear all items
     void clear() {
-      cleanup_items_(items.size());
       items.clear();
       batch_start_time = 0;
     }
 
-    // Remove processed items from the front with proper cleanup
-    void remove_front(size_t count) {
-      cleanup_items_(count);
-      items.erase(items.begin(), items.begin() + count);
-    }
+    // Remove processed items from the front
+    void remove_front(size_t count) { items.erase(items.begin(), items.begin() + count); }
 
     bool empty() const { return items.empty(); }
     size_t size() const { return items.size(); }
@@ -682,21 +650,30 @@ class APIConnection final : public APIServerConnection {
   }
 #endif
 
+  // Helper to check if a message type should bypass batching
+  // Returns true if:
+  // 1. It's an UpdateStateResponse (always send immediately to handle cases where
+  //    the main loop is blocked, e.g., during OTA updates)
+  // 2. It's an EventResponse (events are edge-triggered - every occurrence matters)
+  // 3. OR: User has opted into immediate sending (should_try_send_immediately = true
+  //    AND batch_delay = 0)
+  inline bool should_send_immediately_(uint8_t message_type) const {
+    return (
+#ifdef USE_UPDATE
+        message_type == UpdateStateResponse::MESSAGE_TYPE ||
+#endif
+#ifdef USE_EVENT
+        message_type == EventResponse::MESSAGE_TYPE ||
+#endif
+        (this->flags_.should_try_send_immediately && this->get_batch_delay_ms_() == 0));
+  }
+
   // Helper method to send a message either immediately or via batching
+  // Tries immediate send if should_send_immediately_() returns true and buffer has space
+  // Falls back to batching if immediate send fails or isn't applicable
   bool send_message_smart_(EntityBase *entity, MessageCreatorPtr creator, uint8_t message_type,
                            uint8_t estimated_size) {
-    // Try to send immediately if:
-    // 1. It's an UpdateStateResponse (always send immediately to handle cases where
-    //    the main loop is blocked, e.g., during OTA updates)
-    // 2. OR: We should try to send immediately (should_try_send_immediately = true)
-    //        AND Batch delay is 0 (user has opted in to immediate sending)
-    // 3. AND: Buffer has space available
-    if ((
-#ifdef USE_UPDATE
-            message_type == UpdateStateResponse::MESSAGE_TYPE ||
-#endif
-            (this->flags_.should_try_send_immediately && this->get_batch_delay_ms_() == 0)) &&
-        this->helper_->can_write_without_blocking()) {
+    if (this->should_send_immediately_(message_type) && this->helper_->can_write_without_blocking()) {
       // Now actually encode and send
       if (creator(entity, this, MAX_BATCH_PACKET_SIZE, true) &&
           this->send_buffer(ProtoWriteBuffer{&this->parent_->get_shared_buffer_ref()}, message_type)) {
@@ -714,6 +691,27 @@ class APIConnection final : public APIServerConnection {
     return this->schedule_message_(entity, creator, message_type, estimated_size);
   }
 
+  // Overload for MessageCreator (used by events which need to capture event_type)
+  bool send_message_smart_(EntityBase *entity, MessageCreator creator, uint8_t message_type, uint8_t estimated_size) {
+    // Try to send immediately if message type should bypass batching and buffer has space
+    if (this->should_send_immediately_(message_type) && this->helper_->can_write_without_blocking()) {
+      // Now actually encode and send
+      if (creator(entity, this, MAX_BATCH_PACKET_SIZE, true, message_type) &&
+          this->send_buffer(ProtoWriteBuffer{&this->parent_->get_shared_buffer_ref()}, message_type)) {
+#ifdef HAS_PROTO_MESSAGE_DUMP
+        // Log the message in verbose mode
+        this->log_proto_message_(entity, creator, message_type);
+#endif
+        return true;
+      }
+
+      // If immediate send failed, fall through to batching
+    }
+
+    // Fall back to scheduled batching
+    return this->schedule_message_(entity, std::move(creator), message_type, estimated_size);
+  }
+
   // Helper function to schedule a deferred message with known message type
   bool schedule_message_(EntityBase *entity, MessageCreator creator, uint8_t message_type, uint8_t estimated_size) {
     this->deferred_batch_.add_item(entity, std::move(creator), message_type, estimated_size);

esphome/components/api/api_server.cpp

@@ -5,6 +5,7 @@
 #include "esphome/components/network/util.h"
 #include "esphome/core/application.h"
 #include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #include "esphome/core/hal.h"
 #include "esphome/core/log.h"
 #include "esphome/core/util.h"
@@ -34,7 +35,7 @@ APIServer::APIServer() {
 }
 
 void APIServer::setup() {
-  this->setup_controller();
+  ControllerRegistry::register_controller(this);
 
 #ifdef USE_API_NOISE
   uint32_t hash = 88491486UL;
@@ -269,7 +270,7 @@ bool APIServer::check_password(const uint8_t *password_data, size_t password_len
 
 void APIServer::handle_disconnect(APIConnection *conn) {}
 
-// Macro for entities without extra parameters
+// Macro for controller update dispatch
 #define API_DISPATCH_UPDATE(entity_type, entity_name) \
   void APIServer::on_##entity_name##_update(entity_type *obj) { /* NOLINT(bugprone-macro-parentheses) */ \
     if (obj->is_internal()) \
@@ -278,15 +279,6 @@ void APIServer::handle_disconnect(APIConnection *conn) {}
       c->send_##entity_name##_state(obj); \
   }
 
-// Macro for entities with extra parameters (but parameters not used in send)
-#define API_DISPATCH_UPDATE_IGNORE_PARAMS(entity_type, entity_name, ...) \
-  void APIServer::on_##entity_name##_update(entity_type *obj, __VA_ARGS__) { /* NOLINT(bugprone-macro-parentheses) */ \
-    if (obj->is_internal()) \
-      return; \
-    for (auto &c : this->clients_) \
-      c->send_##entity_name##_state(obj); \
-  }
-
 #ifdef USE_BINARY_SENSOR
 API_DISPATCH_UPDATE(binary_sensor::BinarySensor, binary_sensor)
 #endif
@@ -304,15 +296,15 @@ API_DISPATCH_UPDATE(light::LightState, light)
 #endif
 
 #ifdef USE_SENSOR
-API_DISPATCH_UPDATE_IGNORE_PARAMS(sensor::Sensor, sensor, float state)
+API_DISPATCH_UPDATE(sensor::Sensor, sensor)
 #endif
 
 #ifdef USE_SWITCH
-API_DISPATCH_UPDATE_IGNORE_PARAMS(switch_::Switch, switch, bool state)
+API_DISPATCH_UPDATE(switch_::Switch, switch)
 #endif
 
 #ifdef USE_TEXT_SENSOR
-API_DISPATCH_UPDATE_IGNORE_PARAMS(text_sensor::TextSensor, text_sensor, const std::string &state)
+API_DISPATCH_UPDATE(text_sensor::TextSensor, text_sensor)
 #endif
 
 #ifdef USE_CLIMATE
@@ -320,7 +312,7 @@ API_DISPATCH_UPDATE(climate::Climate, climate)
 #endif
 
 #ifdef USE_NUMBER
-API_DISPATCH_UPDATE_IGNORE_PARAMS(number::Number, number, float state)
+API_DISPATCH_UPDATE(number::Number, number)
 #endif
 
 #ifdef USE_DATETIME_DATE
@@ -336,11 +328,11 @@ API_DISPATCH_UPDATE(datetime::DateTimeEntity, datetime)
 #endif
 
 #ifdef USE_TEXT
-API_DISPATCH_UPDATE_IGNORE_PARAMS(text::Text, text, const std::string &state)
+API_DISPATCH_UPDATE(text::Text, text)
 #endif
 
 #ifdef USE_SELECT
-API_DISPATCH_UPDATE_IGNORE_PARAMS(select::Select, select, const std::string &state, size_t index)
+API_DISPATCH_UPDATE(select::Select, select)
 #endif
 
 #ifdef USE_LOCK
@@ -356,12 +348,13 @@ API_DISPATCH_UPDATE(media_player::MediaPlayer, media_player)
 #endif
 
 #ifdef USE_EVENT
-// Event is a special case - it's the only entity that passes extra parameters to the send method
-void APIServer::on_event(event::Event *obj, const std::string &event_type) {
+// Event is a special case - unlike other entities with simple state fields,
+// events store their state in a member accessed via obj->get_last_event_type()
+void APIServer::on_event(event::Event *obj) {
   if (obj->is_internal())
     return;
   for (auto &c : this->clients_)
-    c->send_event(obj, event_type);
+    c->send_event(obj, obj->get_last_event_type());
 }
 #endif
 

esphome/components/api/api_server.h

@@ -72,19 +72,19 @@ class APIServer : public Component, public Controller {
   void on_light_update(light::LightState *obj) override;
 #endif
 #ifdef USE_SENSOR
-  void on_sensor_update(sensor::Sensor *obj, float state) override;
+  void on_sensor_update(sensor::Sensor *obj) override;
 #endif
 #ifdef USE_SWITCH
-  void on_switch_update(switch_::Switch *obj, bool state) override;
+  void on_switch_update(switch_::Switch *obj) override;
 #endif
 #ifdef USE_TEXT_SENSOR
-  void on_text_sensor_update(text_sensor::TextSensor *obj, const std::string &state) override;
+  void on_text_sensor_update(text_sensor::TextSensor *obj) override;
 #endif
 #ifdef USE_CLIMATE
   void on_climate_update(climate::Climate *obj) override;
 #endif
 #ifdef USE_NUMBER
-  void on_number_update(number::Number *obj, float state) override;
+  void on_number_update(number::Number *obj) override;
 #endif
 #ifdef USE_DATETIME_DATE
   void on_date_update(datetime::DateEntity *obj) override;
@@ -96,10 +96,10 @@ class APIServer : public Component, public Controller {
   void on_datetime_update(datetime::DateTimeEntity *obj) override;
 #endif
 #ifdef USE_TEXT
-  void on_text_update(text::Text *obj, const std::string &state) override;
+  void on_text_update(text::Text *obj) override;
 #endif
 #ifdef USE_SELECT
-  void on_select_update(select::Select *obj, const std::string &state, size_t index) override;
+  void on_select_update(select::Select *obj) override;
 #endif
 #ifdef USE_LOCK
   void on_lock_update(lock::Lock *obj) override;
@@ -141,7 +141,7 @@ class APIServer : public Component, public Controller {
   void on_alarm_control_panel_update(alarm_control_panel::AlarmControlPanel *obj) override;
 #endif
 #ifdef USE_EVENT
-  void on_event(event::Event *obj, const std::string &event_type) override;
+  void on_event(event::Event *obj) override;
 #endif
 #ifdef USE_UPDATE
   void on_update(update::UpdateEntity *obj) override;

esphome/components/binary_sensor/binary_sensor.cpp

@@ -1,4 +1,6 @@
 #include "binary_sensor.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #include "esphome/core/log.h"
 
 namespace esphome {
@@ -37,6 +39,9 @@ void BinarySensor::send_state_internal(bool new_state) {
   // Note that set_state_ de-dups and will only trigger callbacks if the state has actually changed
   if (this->set_state_(new_state)) {
     ESP_LOGD(TAG, "'%s': New state is %s", this->get_name().c_str(), ONOFF(new_state));
+#if defined(USE_BINARY_SENSOR) && defined(USE_CONTROLLER_REGISTRY)
+    ControllerRegistry::notify_binary_sensor_update(this);
+#endif
   }
 }
 

esphome/components/climate/climate.cpp

@@ -1,4 +1,6 @@
 #include "climate.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #include "esphome/core/macros.h"
 
 namespace esphome {
@@ -463,6 +465,9 @@ void Climate::publish_state() {
 
   // Send state to frontend
   this->state_callback_.call(*this);
+#if defined(USE_CLIMATE) && defined(USE_CONTROLLER_REGISTRY)
+  ControllerRegistry::notify_climate_update(this);
+#endif
   // Save state
   this->save_state_();
 }

esphome/components/cover/cover.cpp

@@ -1,5 +1,9 @@
 #include "cover.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
+
 #include <strings.h>
+
 #include "esphome/core/log.h"
 
 namespace esphome {
@@ -169,6 +173,9 @@ void Cover::publish_state(bool save) {
   ESP_LOGD(TAG, "  Current Operation: %s", cover_operation_to_str(this->current_operation));
 
   this->state_callback_.call();
+#if defined(USE_COVER) && defined(USE_CONTROLLER_REGISTRY)
+  ControllerRegistry::notify_cover_update(this);
+#endif
 
   if (save) {
     CoverRestoreState restore{};

esphome/components/datetime/date_entity.cpp

@@ -1,5 +1,6 @@
 #include "date_entity.h"
-
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #ifdef USE_DATETIME_DATE
 
 #include "esphome/core/log.h"
@@ -32,6 +33,9 @@ void DateEntity::publish_state() {
   this->set_has_state(true);
   ESP_LOGD(TAG, "'%s': Sending date %d-%d-%d", this->get_name().c_str(), this->year_, this->month_, this->day_);
   this->state_callback_.call();
+#if defined(USE_DATETIME_DATE) && defined(USE_CONTROLLER_REGISTRY)
+  ControllerRegistry::notify_date_update(this);
+#endif
 }
 
 DateCall DateEntity::make_call() { return DateCall(this); }

esphome/components/datetime/datetime_entity.cpp

@@ -1,5 +1,6 @@
 #include "datetime_entity.h"
-
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #ifdef USE_DATETIME_DATETIME
 
 #include "esphome/core/log.h"
@@ -48,6 +49,9 @@ void DateTimeEntity::publish_state() {
   ESP_LOGD(TAG, "'%s': Sending datetime %04u-%02u-%02u %02d:%02d:%02d", this->get_name().c_str(), this->year_,
            this->month_, this->day_, this->hour_, this->minute_, this->second_);
   this->state_callback_.call();
+#if defined(USE_DATETIME_DATETIME) && defined(USE_CONTROLLER_REGISTRY)
+  ControllerRegistry::notify_datetime_update(this);
+#endif
 }
 
 DateTimeCall DateTimeEntity::make_call() { return DateTimeCall(this); }

esphome/components/datetime/time_entity.cpp

@@ -1,5 +1,6 @@
 #include "time_entity.h"
-
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #ifdef USE_DATETIME_TIME
 
 #include "esphome/core/log.h"
@@ -29,6 +30,9 @@ void TimeEntity::publish_state() {
   ESP_LOGD(TAG, "'%s': Sending time %02d:%02d:%02d", this->get_name().c_str(), this->hour_, this->minute_,
            this->second_);
   this->state_callback_.call();
+#if defined(USE_DATETIME_TIME) && defined(USE_CONTROLLER_REGISTRY)
+  ControllerRegistry::notify_time_update(this);
+#endif
 }
 
 TimeCall TimeEntity::make_call() { return TimeCall(this); }

esphome/components/event/event.cpp

@@ -1,5 +1,6 @@
 #include "event.h"
-
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #include "esphome/core/log.h"
 
 namespace esphome {
@@ -23,6 +24,9 @@ void Event::trigger(const std::string &event_type) {
   this->last_event_type_ = found;
   ESP_LOGD(TAG, "'%s' Triggered event '%s'", this->get_name().c_str(), this->last_event_type_);
   this->event_callback_.call(event_type);
+#if defined(USE_EVENT) && defined(USE_CONTROLLER_REGISTRY)
+  ControllerRegistry::notify_event(this);
+#endif
 }
 
 void Event::set_event_types(const FixedVector<const char *> &event_types) {

esphome/components/fan/fan.cpp

@@ -1,4 +1,6 @@
 #include "fan.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #include "esphome/core/log.h"
 
 namespace esphome {
@@ -181,6 +183,9 @@ void Fan::publish_state() {
     ESP_LOGD(TAG, "  Preset Mode: %s", preset);
   }
   this->state_callback_.call();
+#if defined(USE_FAN) && defined(USE_CONTROLLER_REGISTRY)
+  ControllerRegistry::notify_fan_update(this);
+#endif
   this->save_state_();
 }
 

esphome/components/light/light_state.cpp

@@ -1,7 +1,8 @@
-#include "esphome/core/log.h"
-
-#include "light_output.h"
 #include "light_state.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
+#include "esphome/core/log.h"
+#include "light_output.h"
 #include "transformers.h"
 
 namespace esphome {
@@ -137,7 +138,12 @@ void LightState::loop() {
 
 float LightState::get_setup_priority() const { return setup_priority::HARDWARE - 1.0f; }
 
-void LightState::publish_state() { this->remote_values_callback_.call(); }
+void LightState::publish_state() {
+  this->remote_values_callback_.call();
+#if defined(USE_LIGHT) && defined(USE_CONTROLLER_REGISTRY)
+  ControllerRegistry::notify_light_update(this);
+#endif
+}
 
 LightOutput *LightState::get_output() const { return this->output_; }
 

esphome/components/lock/lock.cpp

@@ -1,4 +1,6 @@
 #include "lock.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #include "esphome/core/log.h"
 
 namespace esphome {
@@ -53,6 +55,9 @@ void Lock::publish_state(LockState state) {
   this->rtc_.save(&this->state);
   ESP_LOGD(TAG, "'%s': Sending state %s", this->name_.c_str(), lock_state_to_string(state));
   this->state_callback_.call();
+#if defined(USE_LOCK) && defined(USE_CONTROLLER_REGISTRY)
+  ControllerRegistry::notify_lock_update(this);
+#endif
 }
 
 void Lock::add_on_state_callback(std::function<void()> &&callback) { this->state_callback_.add(std::move(callback)); }

esphome/components/media_player/media_player.cpp

@@ -1,5 +1,6 @@
 #include "media_player.h"
-
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #include "esphome/core/log.h"
 
 namespace esphome {
@@ -148,7 +149,12 @@ void MediaPlayer::add_on_state_callback(std::function<void()> &&callback) {
   this->state_callback_.add(std::move(callback));
 }
 
-void MediaPlayer::publish_state() { this->state_callback_.call(); }
+void MediaPlayer::publish_state() {
+  this->state_callback_.call();
+#if defined(USE_MEDIA_PLAYER) && defined(USE_CONTROLLER_REGISTRY)
+  ControllerRegistry::notify_media_player_update(this);
+#endif
+}
 
 }  // namespace media_player
 }  // namespace esphome

esphome/components/number/number.cpp

@@ -1,4 +1,6 @@
 #include "number.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #include "esphome/core/log.h"
 
 namespace esphome {
@@ -32,6 +34,9 @@ void Number::publish_state(float state) {
   this->state = state;
   ESP_LOGD(TAG, "'%s': Sending state %f", this->get_name().c_str(), state);
   this->state_callback_.call(state);
+#if defined(USE_NUMBER) && defined(USE_CONTROLLER_REGISTRY)
+  ControllerRegistry::notify_number_update(this);
+#endif
 }
 
 void Number::add_on_state_callback(std::function<void(float)> &&callback) {

esphome/components/select/select.cpp

@@ -1,4 +1,6 @@
 #include "select.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #include "esphome/core/log.h"
 #include <cstring>
 
@@ -33,6 +35,9 @@ void Select::publish_state(size_t index) {
   ESP_LOGD(TAG, "'%s': Sending state %s (index %zu)", this->get_name().c_str(), option, index);
   // Callback signature requires std::string, create temporary for compatibility
   this->state_callback_.call(std::string(option), index);
+#if defined(USE_SELECT) && defined(USE_CONTROLLER_REGISTRY)
+  ControllerRegistry::notify_select_update(this);
+#endif
 }
 
 const char *Select::current_option() const { return this->has_state() ? this->option_at(this->active_index_) : ""; }

esphome/components/sensor/sensor.cpp

@@ -1,4 +1,6 @@
 #include "sensor.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #include "esphome/core/log.h"
 
 namespace esphome {
@@ -72,9 +74,9 @@ StateClass Sensor::get_state_class() {
 
 void Sensor::publish_state(float state) {
   this->raw_state = state;
-
-  // Call raw callbacks (before filters)
-  this->callbacks_.call_first(this->raw_count_, state);
+  if (this->raw_callback_) {
+    this->raw_callback_->call(state);
+  }
 
   ESP_LOGV(TAG, "'%s': Received new state %f", this->name_.c_str(), state);
 
@@ -85,12 +87,12 @@ void Sensor::publish_state(float state) {
   }
 }
 
-void Sensor::add_on_state_callback(std::function<void(float)> &&callback) {
-  this->callbacks_.add_second(std::move(callback));
-}
-
+void Sensor::add_on_state_callback(std::function<void(float)> &&callback) { this->callback_.add(std::move(callback)); }
 void Sensor::add_on_raw_state_callback(std::function<void(float)> &&callback) {
-  this->callbacks_.add_first(std::move(callback), &this->raw_count_);
+  if (!this->raw_callback_) {
+    this->raw_callback_ = make_unique<CallbackManager<void(float)>>();
+  }
+  this->raw_callback_->add(std::move(callback));
 }
 
 void Sensor::add_filter(Filter *filter) {
@@ -130,10 +132,7 @@ void Sensor::internal_send_state_to_frontend(float state) {
   this->state = state;
   ESP_LOGD(TAG, "'%s': Sending state %.5f %s with %d decimals of accuracy", this->get_name().c_str(), state,
            this->get_unit_of_measurement_ref().c_str(), this->get_accuracy_decimals());
-
-  // Call filtered callbacks (after filters)
-  this->callbacks_.call_second(this->raw_count_, state);
-
+  this->callback_.call(state);
 #if defined(USE_SENSOR) && defined(USE_CONTROLLER_REGISTRY)
   ControllerRegistry::notify_sensor_update(this);
 #endif

esphome/components/sensor/sensor.h

@@ -124,7 +124,8 @@ class Sensor : public EntityBase, public EntityBase_DeviceClass, public EntityBa
   void internal_send_state_to_frontend(float state);
 
  protected:
-  PartitionedCallbackManager<void(float)> callbacks_;
+  std::unique_ptr<CallbackManager<void(float)>> raw_callback_;  ///< Storage for raw state callbacks (lazy allocated).
+  CallbackManager<void(float)> callback_;                       ///< Storage for filtered state callbacks.
 
   Filter *filter_list_{nullptr};  ///< Store all active filters.
 
@@ -139,8 +140,6 @@ class Sensor : public EntityBase, public EntityBase_DeviceClass, public EntityBa
     uint8_t force_update : 1;
     uint8_t reserved : 5;  // Reserved for future use
   } sensor_flags_{};
-
-  uint8_t raw_count_{0};  ///< Number of raw callbacks (partition point in callbacks_ vector)
 };
 
 }  // namespace sensor

esphome/components/switch/switch.cpp

@@ -1,4 +1,6 @@
 #include "switch.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #include "esphome/core/log.h"
 
 namespace esphome {
@@ -62,6 +64,9 @@ void Switch::publish_state(bool state) {
 
   ESP_LOGD(TAG, "'%s': Sending state %s", this->name_.c_str(), ONOFF(this->state));
   this->state_callback_.call(this->state);
+#if defined(USE_SWITCH) && defined(USE_CONTROLLER_REGISTRY)
+  ControllerRegistry::notify_switch_update(this);
+#endif
 }
 bool Switch::assumed_state() { return false; }
 

esphome/components/text/text.cpp

@@ -1,4 +1,6 @@
 #include "text.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #include "esphome/core/log.h"
 
 namespace esphome {
@@ -16,6 +18,9 @@ void Text::publish_state(const std::string &state) {
     ESP_LOGD(TAG, "'%s': Sending state %s", this->get_name().c_str(), state.c_str());
   }
   this->state_callback_.call(state);
+#if defined(USE_TEXT) && defined(USE_CONTROLLER_REGISTRY)
+  ControllerRegistry::notify_text_update(this);
+#endif
 }
 
 void Text::add_on_state_callback(std::function<void(std::string)> &&callback) {

esphome/components/text_sensor/text_sensor.cpp

@@ -1,4 +1,6 @@
 #include "text_sensor.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #include "esphome/core/log.h"
 
 namespace esphome {
@@ -24,9 +26,9 @@ void log_text_sensor(const char *tag, const char *prefix, const char *type, Text
 
 void TextSensor::publish_state(const std::string &state) {
   this->raw_state = state;
-
-  // Call raw callbacks (before filters)
-  this->callbacks_.call_first(this->raw_count_, state);
+  if (this->raw_callback_) {
+    this->raw_callback_->call(state);
+  }
 
   ESP_LOGV(TAG, "'%s': Received new state %s", this->name_.c_str(), state.c_str());
 
@@ -68,11 +70,13 @@ void TextSensor::clear_filters() {
 }
 
 void TextSensor::add_on_state_callback(std::function<void(std::string)> callback) {
-  this->callbacks_.add_second(std::move(callback));
+  this->callback_.add(std::move(callback));
 }
-
 void TextSensor::add_on_raw_state_callback(std::function<void(std::string)> callback) {
-  this->callbacks_.add_first(std::move(callback), &this->raw_count_);
+  if (!this->raw_callback_) {
+    this->raw_callback_ = make_unique<CallbackManager<void(std::string)>>();
+  }
+  this->raw_callback_->add(std::move(callback));
 }
 
 std::string TextSensor::get_state() const { return this->state; }
@@ -81,10 +85,7 @@ void TextSensor::internal_send_state_to_frontend(const std::string &state) {
   this->state = state;
   this->set_has_state(true);
   ESP_LOGD(TAG, "'%s': Sending state '%s'", this->name_.c_str(), state.c_str());
-
-  // Call filtered callbacks (after filters)
-  this->callbacks_.call_second(this->raw_count_, state);
-
+  this->callback_.call(state);
 #if defined(USE_TEXT_SENSOR) && defined(USE_CONTROLLER_REGISTRY)
   ControllerRegistry::notify_text_sensor_update(this);
 #endif

esphome/components/text_sensor/text_sensor.h

@@ -58,11 +58,11 @@ class TextSensor : public EntityBase, public EntityBase_DeviceClass {
   void internal_send_state_to_frontend(const std::string &state);
 
  protected:
-  PartitionedCallbackManager<void(std::string)> callbacks_;
+  std::unique_ptr<CallbackManager<void(std::string)>>
+      raw_callback_;                             ///< Storage for raw state callbacks (lazy allocated).
+  CallbackManager<void(std::string)> callback_;  ///< Storage for filtered state callbacks.
 
   Filter *filter_list_{nullptr};  ///< Store all active filters.
-
-  uint8_t raw_count_{0};  ///< Number of raw callbacks (partition point in callbacks_ vector)
 };
 
 }  // namespace text_sensor

esphome/components/update/update_entity.cpp

@@ -1,5 +1,6 @@
 #include "update_entity.h"
-
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #include "esphome/core/log.h"
 
 namespace esphome {
@@ -32,6 +33,9 @@ void UpdateEntity::publish_state() {
 
   this->set_has_state(true);
   this->state_callback_.call();
+#if defined(USE_UPDATE) && defined(USE_CONTROLLER_REGISTRY)
+  ControllerRegistry::notify_update(this);
+#endif
 }
 
 }  // namespace update

esphome/components/valve/valve.cpp

@@ -1,4 +1,6 @@
 #include "valve.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #include "esphome/core/log.h"
 #include <strings.h>
 
@@ -147,6 +149,9 @@ void Valve::publish_state(bool save) {
   ESP_LOGD(TAG, "  Current Operation: %s", valve_operation_to_str(this->current_operation));
 
   this->state_callback_.call();
+#if defined(USE_VALVE) && defined(USE_CONTROLLER_REGISTRY)
+  ControllerRegistry::notify_valve_update(this);
+#endif
 
   if (save) {
     ValveRestoreState restore{};

esphome/components/web_server/__init__.py

@@ -289,6 +289,9 @@ async def to_code(config):
     var = cg.new_Pvariable(config[CONF_ID], paren)
     await cg.register_component(var, config)
 
+    # Track controller registration for StaticVector sizing
+    CORE.register_controller()
+
     version = config[CONF_VERSION]
 
     cg.add(paren.set_port(config[CONF_PORT]))

esphome/components/web_server/web_server.cpp

@@ -3,6 +3,8 @@
 #include "esphome/components/json/json_util.h"
 #include "esphome/components/network/util.h"
 #include "esphome/core/application.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/controller_registry.h"
 #include "esphome/core/entity_base.h"
 #include "esphome/core/helpers.h"
 #include "esphome/core/log.h"
@@ -294,7 +296,7 @@ std::string WebServer::get_config_json() {
 }
 
 void WebServer::setup() {
-  this->setup_controller(this->include_internal_);
+  ControllerRegistry::register_controller(this);
   this->base_->init();
 
 #ifdef USE_LOGGER
@@ -430,7 +432,9 @@ static JsonDetail get_request_detail(AsyncWebServerRequest *request) {
 }
 
 #ifdef USE_SENSOR
-void WebServer::on_sensor_update(sensor::Sensor *obj, float state) {
+void WebServer::on_sensor_update(sensor::Sensor *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", sensor_state_json_generator);
 }
 void WebServer::handle_sensor_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -473,7 +477,9 @@ std::string WebServer::sensor_json(sensor::Sensor *obj, float value, JsonDetail
 #endif
 
 #ifdef USE_TEXT_SENSOR
-void WebServer::on_text_sensor_update(text_sensor::TextSensor *obj, const std::string &state) {
+void WebServer::on_text_sensor_update(text_sensor::TextSensor *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", text_sensor_state_json_generator);
 }
 void WebServer::handle_text_sensor_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -513,7 +519,9 @@ std::string WebServer::text_sensor_json(text_sensor::TextSensor *obj, const std:
 #endif
 
 #ifdef USE_SWITCH
-void WebServer::on_switch_update(switch_::Switch *obj, bool state) {
+void WebServer::on_switch_update(switch_::Switch *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", switch_state_json_generator);
 }
 void WebServer::handle_switch_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -625,6 +633,8 @@ std::string WebServer::button_json(button::Button *obj, JsonDetail start_config)
 
 #ifdef USE_BINARY_SENSOR
 void WebServer::on_binary_sensor_update(binary_sensor::BinarySensor *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", binary_sensor_state_json_generator);
 }
 void WebServer::handle_binary_sensor_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -664,6 +674,8 @@ std::string WebServer::binary_sensor_json(binary_sensor::BinarySensor *obj, bool
 
 #ifdef USE_FAN
 void WebServer::on_fan_update(fan::Fan *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", fan_state_json_generator);
 }
 void WebServer::handle_fan_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -738,6 +750,8 @@ std::string WebServer::fan_json(fan::Fan *obj, JsonDetail start_config) {
 
 #ifdef USE_LIGHT
 void WebServer::on_light_update(light::LightState *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", light_state_json_generator);
 }
 void WebServer::handle_light_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -811,6 +825,8 @@ std::string WebServer::light_json(light::LightState *obj, JsonDetail start_confi
 
 #ifdef USE_COVER
 void WebServer::on_cover_update(cover::Cover *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", cover_state_json_generator);
 }
 void WebServer::handle_cover_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -895,7 +911,9 @@ std::string WebServer::cover_json(cover::Cover *obj, JsonDetail start_config) {
 #endif
 
 #ifdef USE_NUMBER
-void WebServer::on_number_update(number::Number *obj, float state) {
+void WebServer::on_number_update(number::Number *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", number_state_json_generator);
 }
 void WebServer::handle_number_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -961,6 +979,8 @@ std::string WebServer::number_json(number::Number *obj, float value, JsonDetail
 
 #ifdef USE_DATETIME_DATE
 void WebServer::on_date_update(datetime::DateEntity *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", date_state_json_generator);
 }
 void WebServer::handle_date_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -1016,6 +1036,8 @@ std::string WebServer::date_json(datetime::DateEntity *obj, JsonDetail start_con
 
 #ifdef USE_DATETIME_TIME
 void WebServer::on_time_update(datetime::TimeEntity *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", time_state_json_generator);
 }
 void WebServer::handle_time_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -1070,6 +1092,8 @@ std::string WebServer::time_json(datetime::TimeEntity *obj, JsonDetail start_con
 
 #ifdef USE_DATETIME_DATETIME
 void WebServer::on_datetime_update(datetime::DateTimeEntity *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", datetime_state_json_generator);
 }
 void WebServer::handle_datetime_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -1124,7 +1148,9 @@ std::string WebServer::datetime_json(datetime::DateTimeEntity *obj, JsonDetail s
 #endif  // USE_DATETIME_DATETIME
 
 #ifdef USE_TEXT
-void WebServer::on_text_update(text::Text *obj, const std::string &state) {
+void WebServer::on_text_update(text::Text *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", text_state_json_generator);
 }
 void WebServer::handle_text_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -1178,7 +1204,9 @@ std::string WebServer::text_json(text::Text *obj, const std::string &value, Json
 #endif
 
 #ifdef USE_SELECT
-void WebServer::on_select_update(select::Select *obj, const std::string &state, size_t index) {
+void WebServer::on_select_update(select::Select *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", select_state_json_generator);
 }
 void WebServer::handle_select_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -1237,6 +1265,8 @@ std::string WebServer::select_json(select::Select *obj, const char *value, JsonD
 
 #ifdef USE_CLIMATE
 void WebServer::on_climate_update(climate::Climate *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", climate_state_json_generator);
 }
 void WebServer::handle_climate_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -1378,6 +1408,8 @@ std::string WebServer::climate_json(climate::Climate *obj, JsonDetail start_conf
 
 #ifdef USE_LOCK
 void WebServer::on_lock_update(lock::Lock *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", lock_state_json_generator);
 }
 void WebServer::handle_lock_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -1449,6 +1481,8 @@ std::string WebServer::lock_json(lock::Lock *obj, lock::LockState value, JsonDet
 
 #ifdef USE_VALVE
 void WebServer::on_valve_update(valve::Valve *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", valve_state_json_generator);
 }
 void WebServer::handle_valve_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -1530,6 +1564,8 @@ std::string WebServer::valve_json(valve::Valve *obj, JsonDetail start_config) {
 
 #ifdef USE_ALARM_CONTROL_PANEL
 void WebServer::on_alarm_control_panel_update(alarm_control_panel::AlarmControlPanel *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", alarm_control_panel_state_json_generator);
 }
 void WebServer::handle_alarm_control_panel_request(AsyncWebServerRequest *request, const UrlMatch &match) {
@@ -1607,7 +1643,9 @@ std::string WebServer::alarm_control_panel_json(alarm_control_panel::AlarmContro
 #endif
 
 #ifdef USE_EVENT
-void WebServer::on_event(event::Event *obj, const std::string &event_type) {
+void WebServer::on_event(event::Event *obj) {
+  if (!this->include_internal_ && obj->is_internal())
+    return;
   this->events_.deferrable_send_state(obj, "state", event_state_json_generator);
 }
 

esphome/components/web_server/web_server.h

@@ -255,7 +255,7 @@ class WebServer : public Controller, public Component, public AsyncWebHandler {
 #endif
 
 #ifdef USE_SENSOR
-  void on_sensor_update(sensor::Sensor *obj, float state) override;
+  void on_sensor_update(sensor::Sensor *obj) override;
   /// Handle a sensor request under '/sensor/<id>'.
   void handle_sensor_request(AsyncWebServerRequest *request, const UrlMatch &match);
 
@@ -266,7 +266,7 @@ class WebServer : public Controller, public Component, public AsyncWebHandler {
 #endif
 
 #ifdef USE_SWITCH
-  void on_switch_update(switch_::Switch *obj, bool state) override;
+  void on_switch_update(switch_::Switch *obj) override;
 
   /// Handle a switch request under '/switch/<id>/</turn_on/turn_off/toggle>'.
   void handle_switch_request(AsyncWebServerRequest *request, const UrlMatch &match);
@@ -324,7 +324,7 @@ class WebServer : public Controller, public Component, public AsyncWebHandler {
 #endif
 
 #ifdef USE_TEXT_SENSOR
-  void on_text_sensor_update(text_sensor::TextSensor *obj, const std::string &state) override;
+  void on_text_sensor_update(text_sensor::TextSensor *obj) override;
 
   /// Handle a text sensor request under '/text_sensor/<id>'.
   void handle_text_sensor_request(AsyncWebServerRequest *request, const UrlMatch &match);
@@ -348,7 +348,7 @@ class WebServer : public Controller, public Component, public AsyncWebHandler {
 #endif
 
 #ifdef USE_NUMBER
-  void on_number_update(number::Number *obj, float state) override;
+  void on_number_update(number::Number *obj) override;
   /// Handle a number request under '/number/<id>'.
   void handle_number_request(AsyncWebServerRequest *request, const UrlMatch &match);
 
@@ -392,7 +392,7 @@ class WebServer : public Controller, public Component, public AsyncWebHandler {
 #endif
 
 #ifdef USE_TEXT
-  void on_text_update(text::Text *obj, const std::string &state) override;
+  void on_text_update(text::Text *obj) override;
   /// Handle a text input request under '/text/<id>'.
   void handle_text_request(AsyncWebServerRequest *request, const UrlMatch &match);
 
@@ -403,7 +403,7 @@ class WebServer : public Controller, public Component, public AsyncWebHandler {
 #endif
 
 #ifdef USE_SELECT
-  void on_select_update(select::Select *obj, const std::string &state, size_t index) override;
+  void on_select_update(select::Select *obj) override;
   /// Handle a select request under '/select/<id>'.
   void handle_select_request(AsyncWebServerRequest *request, const UrlMatch &match);
 
@@ -462,7 +462,7 @@ class WebServer : public Controller, public Component, public AsyncWebHandler {
 #endif
 
 #ifdef USE_EVENT
-  void on_event(event::Event *obj, const std::string &event_type) override;
+  void on_event(event::Event *obj) override;
 
   static std::string event_state_json_generator(WebServer *web_server, void *source);
   static std::string event_all_json_generator(WebServer *web_server, void *source);

esphome/core/__init__.py

@@ -48,6 +48,9 @@ if TYPE_CHECKING:
 
 _LOGGER = logging.getLogger(__name__)
 
+# Key for tracking controller count in CORE.data for ControllerRegistry StaticVector sizing
+KEY_CONTROLLER_REGISTRY_COUNT = "controller_registry_count"
+
 
 class EsphomeError(Exception):
     """General ESPHome exception occurred."""
@@ -910,6 +913,11 @@ class EsphomeCore:
         """
         self.platform_counts[platform_name] += 1
 
+    def register_controller(self) -> None:
+        """Track registration of a Controller for ControllerRegistry StaticVector sizing."""
+        controller_count = self.data.setdefault(KEY_CONTROLLER_REGISTRY_COUNT, 0)
+        self.data[KEY_CONTROLLER_REGISTRY_COUNT] = controller_count + 1
+
     @property
     def cpp_main_section(self):
         from esphome.cpp_generator import statement

esphome/core/config.py

@@ -40,7 +40,12 @@ from esphome.const import (
     PlatformFramework,
     __version__ as ESPHOME_VERSION,
 )
-from esphome.core import CORE, CoroPriority, coroutine_with_priority
+from esphome.core import (
+    CORE,
+    KEY_CONTROLLER_REGISTRY_COUNT,
+    CoroPriority,
+    coroutine_with_priority,
+)
 from esphome.helpers import (
     copy_file_if_changed,
     fnv1a_32bit_hash,
@@ -462,6 +467,15 @@ async def _add_platform_defines() -> None:
             cg.add_define(f"USE_{platform_name.upper()}")
 
 
+@coroutine_with_priority(CoroPriority.FINAL)
+async def _add_controller_registry_define() -> None:
+    # Generate StaticVector size for ControllerRegistry
+    controller_count = CORE.data.get(KEY_CONTROLLER_REGISTRY_COUNT, 0)
+    if controller_count > 0:
+        cg.add_define("USE_CONTROLLER_REGISTRY")
+        cg.add_define("CONTROLLER_REGISTRY_MAX", controller_count)
+
+
 @coroutine_with_priority(CoroPriority.CORE)
 async def to_code(config: ConfigType) -> None:
     cg.add_global(cg.global_ns.namespace("esphome").using)
@@ -483,6 +497,7 @@ async def to_code(config: ConfigType) -> None:
     cg.add_define("ESPHOME_COMPONENT_COUNT", len(CORE.component_ids))
 
     CORE.add_job(_add_platform_defines)
+    CORE.add_job(_add_controller_registry_define)
 
     CORE.add_job(_add_automations, config)
 

esphome/core/controller.cpp

@@ -1,134 +0,0 @@
-#include "controller.h"
-#include "esphome/core/application.h"
-#include "esphome/core/log.h"
-
-namespace esphome {
-
-void Controller::setup_controller(bool include_internal) {
-#ifdef USE_BINARY_SENSOR
-  for (auto *obj : App.get_binary_sensors()) {
-    if (include_internal || !obj->is_internal()) {
-      obj->add_full_state_callback(
-          [this, obj](optional<bool> previous, optional<bool> state) { this->on_binary_sensor_update(obj); });
-    }
-  }
-#endif
-#ifdef USE_FAN
-  for (auto *obj : App.get_fans()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_state_callback([this, obj]() { this->on_fan_update(obj); });
-  }
-#endif
-#ifdef USE_LIGHT
-  for (auto *obj : App.get_lights()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_new_remote_values_callback([this, obj]() { this->on_light_update(obj); });
-  }
-#endif
-#ifdef USE_SENSOR
-  for (auto *obj : App.get_sensors()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_state_callback([this, obj](float state) { this->on_sensor_update(obj, state); });
-  }
-#endif
-#ifdef USE_SWITCH
-  for (auto *obj : App.get_switches()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_state_callback([this, obj](bool state) { this->on_switch_update(obj, state); });
-  }
-#endif
-#ifdef USE_COVER
-  for (auto *obj : App.get_covers()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_state_callback([this, obj]() { this->on_cover_update(obj); });
-  }
-#endif
-#ifdef USE_TEXT_SENSOR
-  for (auto *obj : App.get_text_sensors()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_state_callback([this, obj](const std::string &state) { this->on_text_sensor_update(obj, state); });
-  }
-#endif
-#ifdef USE_CLIMATE
-  for (auto *obj : App.get_climates()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_state_callback([this, obj](climate::Climate & /*unused*/) { this->on_climate_update(obj); });
-  }
-#endif
-#ifdef USE_NUMBER
-  for (auto *obj : App.get_numbers()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_state_callback([this, obj](float state) { this->on_number_update(obj, state); });
-  }
-#endif
-#ifdef USE_DATETIME_DATE
-  for (auto *obj : App.get_dates()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_state_callback([this, obj]() { this->on_date_update(obj); });
-  }
-#endif
-#ifdef USE_DATETIME_TIME
-  for (auto *obj : App.get_times()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_state_callback([this, obj]() { this->on_time_update(obj); });
-  }
-#endif
-#ifdef USE_DATETIME_DATETIME
-  for (auto *obj : App.get_datetimes()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_state_callback([this, obj]() { this->on_datetime_update(obj); });
-  }
-#endif
-#ifdef USE_TEXT
-  for (auto *obj : App.get_texts()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_state_callback([this, obj](const std::string &state) { this->on_text_update(obj, state); });
-  }
-#endif
-#ifdef USE_SELECT
-  for (auto *obj : App.get_selects()) {
-    if (include_internal || !obj->is_internal()) {
-      obj->add_on_state_callback(
-          [this, obj](const std::string &state, size_t index) { this->on_select_update(obj, state, index); });
-    }
-  }
-#endif
-#ifdef USE_LOCK
-  for (auto *obj : App.get_locks()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_state_callback([this, obj]() { this->on_lock_update(obj); });
-  }
-#endif
-#ifdef USE_VALVE
-  for (auto *obj : App.get_valves()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_state_callback([this, obj]() { this->on_valve_update(obj); });
-  }
-#endif
-#ifdef USE_MEDIA_PLAYER
-  for (auto *obj : App.get_media_players()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_state_callback([this, obj]() { this->on_media_player_update(obj); });
-  }
-#endif
-#ifdef USE_ALARM_CONTROL_PANEL
-  for (auto *obj : App.get_alarm_control_panels()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_state_callback([this, obj]() { this->on_alarm_control_panel_update(obj); });
-  }
-#endif
-#ifdef USE_EVENT
-  for (auto *obj : App.get_events()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_event_callback([this, obj](const std::string &event_type) { this->on_event(obj, event_type); });
-  }
-#endif
-#ifdef USE_UPDATE
-  for (auto *obj : App.get_updates()) {
-    if (include_internal || !obj->is_internal())
-      obj->add_on_state_callback([this, obj]() { this->on_update(obj); });
-  }
-#endif
-}
-
-}  // namespace esphome

esphome/core/controller.h

@@ -69,7 +69,6 @@ namespace esphome {
 
 class Controller {
  public:
-  void setup_controller(bool include_internal = false);
 #ifdef USE_BINARY_SENSOR
   virtual void on_binary_sensor_update(binary_sensor::BinarySensor *obj){};
 #endif
@@ -80,22 +79,22 @@ class Controller {
   virtual void on_light_update(light::LightState *obj){};
 #endif
 #ifdef USE_SENSOR
-  virtual void on_sensor_update(sensor::Sensor *obj, float state){};
+  virtual void on_sensor_update(sensor::Sensor *obj){};
 #endif
 #ifdef USE_SWITCH
-  virtual void on_switch_update(switch_::Switch *obj, bool state){};
+  virtual void on_switch_update(switch_::Switch *obj){};
 #endif
 #ifdef USE_COVER
   virtual void on_cover_update(cover::Cover *obj){};
 #endif
 #ifdef USE_TEXT_SENSOR
-  virtual void on_text_sensor_update(text_sensor::TextSensor *obj, const std::string &state){};
+  virtual void on_text_sensor_update(text_sensor::TextSensor *obj){};
 #endif
 #ifdef USE_CLIMATE
   virtual void on_climate_update(climate::Climate *obj){};
 #endif
 #ifdef USE_NUMBER
-  virtual void on_number_update(number::Number *obj, float state){};
+  virtual void on_number_update(number::Number *obj){};
 #endif
 #ifdef USE_DATETIME_DATE
   virtual void on_date_update(datetime::DateEntity *obj){};
@@ -107,10 +106,10 @@ class Controller {
   virtual void on_datetime_update(datetime::DateTimeEntity *obj){};
 #endif
 #ifdef USE_TEXT
-  virtual void on_text_update(text::Text *obj, const std::string &state){};
+  virtual void on_text_update(text::Text *obj){};
 #endif
 #ifdef USE_SELECT
-  virtual void on_select_update(select::Select *obj, const std::string &state, size_t index){};
+  virtual void on_select_update(select::Select *obj){};
 #endif
 #ifdef USE_LOCK
   virtual void on_lock_update(lock::Lock *obj){};
@@ -125,7 +124,7 @@ class Controller {
   virtual void on_alarm_control_panel_update(alarm_control_panel::AlarmControlPanel *obj){};
 #endif
 #ifdef USE_EVENT
-  virtual void on_event(event::Event *obj, const std::string &event_type){};
+  virtual void on_event(event::Event *obj){};
 #endif
 #ifdef USE_UPDATE
   virtual void on_update(update::UpdateEntity *obj){};

esphome/core/controller_registry.cpp

@@ -0,0 +1,114 @@
+#include "esphome/core/controller_registry.h"
+
+#ifdef USE_CONTROLLER_REGISTRY
+
+#include "esphome/core/controller.h"
+
+namespace esphome {
+
+StaticVector<Controller *, CONTROLLER_REGISTRY_MAX> ControllerRegistry::controllers;
+
+void ControllerRegistry::register_controller(Controller *controller) { controllers.push_back(controller); }
+
+// Macro for standard registry notification dispatch - calls on_<entity_name>_update()
+#define CONTROLLER_REGISTRY_NOTIFY(entity_type, entity_name) \
+  void ControllerRegistry::notify_##entity_name##_update(entity_type *obj) { /* NOLINT(bugprone-macro-parentheses) */ \
+    for (auto *controller : controllers) { \
+      controller->on_##entity_name##_update(obj); \
+    } \
+  }
+
+// Macro for entities where controller method has no "_update" suffix (Event, Update)
+#define CONTROLLER_REGISTRY_NOTIFY_NO_UPDATE_SUFFIX(entity_type, entity_name) \
+  void ControllerRegistry::notify_##entity_name(entity_type *obj) { /* NOLINT(bugprone-macro-parentheses) */ \
+    for (auto *controller : controllers) { \
+      controller->on_##entity_name(obj); \
+    } \
+  }
+
+#ifdef USE_BINARY_SENSOR
+CONTROLLER_REGISTRY_NOTIFY(binary_sensor::BinarySensor, binary_sensor)
+#endif
+
+#ifdef USE_FAN
+CONTROLLER_REGISTRY_NOTIFY(fan::Fan, fan)
+#endif
+
+#ifdef USE_LIGHT
+CONTROLLER_REGISTRY_NOTIFY(light::LightState, light)
+#endif
+
+#ifdef USE_SENSOR
+CONTROLLER_REGISTRY_NOTIFY(sensor::Sensor, sensor)
+#endif
+
+#ifdef USE_SWITCH
+CONTROLLER_REGISTRY_NOTIFY(switch_::Switch, switch)
+#endif
+
+#ifdef USE_COVER
+CONTROLLER_REGISTRY_NOTIFY(cover::Cover, cover)
+#endif
+
+#ifdef USE_TEXT_SENSOR
+CONTROLLER_REGISTRY_NOTIFY(text_sensor::TextSensor, text_sensor)
+#endif
+
+#ifdef USE_CLIMATE
+CONTROLLER_REGISTRY_NOTIFY(climate::Climate, climate)
+#endif
+
+#ifdef USE_NUMBER
+CONTROLLER_REGISTRY_NOTIFY(number::Number, number)
+#endif
+
+#ifdef USE_DATETIME_DATE
+CONTROLLER_REGISTRY_NOTIFY(datetime::DateEntity, date)
+#endif
+
+#ifdef USE_DATETIME_TIME
+CONTROLLER_REGISTRY_NOTIFY(datetime::TimeEntity, time)
+#endif
+
+#ifdef USE_DATETIME_DATETIME
+CONTROLLER_REGISTRY_NOTIFY(datetime::DateTimeEntity, datetime)
+#endif
+
+#ifdef USE_TEXT
+CONTROLLER_REGISTRY_NOTIFY(text::Text, text)
+#endif
+
+#ifdef USE_SELECT
+CONTROLLER_REGISTRY_NOTIFY(select::Select, select)
+#endif
+
+#ifdef USE_LOCK
+CONTROLLER_REGISTRY_NOTIFY(lock::Lock, lock)
+#endif
+
+#ifdef USE_VALVE
+CONTROLLER_REGISTRY_NOTIFY(valve::Valve, valve)
+#endif
+
+#ifdef USE_MEDIA_PLAYER
+CONTROLLER_REGISTRY_NOTIFY(media_player::MediaPlayer, media_player)
+#endif
+
+#ifdef USE_ALARM_CONTROL_PANEL
+CONTROLLER_REGISTRY_NOTIFY(alarm_control_panel::AlarmControlPanel, alarm_control_panel)
+#endif
+
+#ifdef USE_EVENT
+CONTROLLER_REGISTRY_NOTIFY_NO_UPDATE_SUFFIX(event::Event, event)
+#endif
+
+#ifdef USE_UPDATE
+CONTROLLER_REGISTRY_NOTIFY_NO_UPDATE_SUFFIX(update::UpdateEntity, update)
+#endif
+
+#undef CONTROLLER_REGISTRY_NOTIFY
+#undef CONTROLLER_REGISTRY_NOTIFY_NO_UPDATE_SUFFIX
+
+}  // namespace esphome
+
+#endif  // USE_CONTROLLER_REGISTRY

esphome/core/controller_registry.h

@@ -0,0 +1,245 @@
+#pragma once
+
+#include "esphome/core/defines.h"
+
+#ifdef USE_CONTROLLER_REGISTRY
+
+#include "esphome/core/helpers.h"
+
+// Forward declarations
+namespace esphome {
+
+class Controller;
+
+#ifdef USE_BINARY_SENSOR
+namespace binary_sensor {
+class BinarySensor;
+}
+#endif
+
+#ifdef USE_FAN
+namespace fan {
+class Fan;
+}
+#endif
+
+#ifdef USE_LIGHT
+namespace light {
+class LightState;
+}
+#endif
+
+#ifdef USE_SENSOR
+namespace sensor {
+class Sensor;
+}
+#endif
+
+#ifdef USE_SWITCH
+namespace switch_ {
+class Switch;
+}
+#endif
+
+#ifdef USE_COVER
+namespace cover {
+class Cover;
+}
+#endif
+
+#ifdef USE_TEXT_SENSOR
+namespace text_sensor {
+class TextSensor;
+}
+#endif
+
+#ifdef USE_CLIMATE
+namespace climate {
+class Climate;
+}
+#endif
+
+#ifdef USE_NUMBER
+namespace number {
+class Number;
+}
+#endif
+
+#ifdef USE_DATETIME_DATE
+namespace datetime {
+class DateEntity;
+}
+#endif
+
+#ifdef USE_DATETIME_TIME
+namespace datetime {
+class TimeEntity;
+}
+#endif
+
+#ifdef USE_DATETIME_DATETIME
+namespace datetime {
+class DateTimeEntity;
+}
+#endif
+
+#ifdef USE_TEXT
+namespace text {
+class Text;
+}
+#endif
+
+#ifdef USE_SELECT
+namespace select {
+class Select;
+}
+#endif
+
+#ifdef USE_LOCK
+namespace lock {
+class Lock;
+}
+#endif
+
+#ifdef USE_VALVE
+namespace valve {
+class Valve;
+}
+#endif
+
+#ifdef USE_MEDIA_PLAYER
+namespace media_player {
+class MediaPlayer;
+}
+#endif
+
+#ifdef USE_ALARM_CONTROL_PANEL
+namespace alarm_control_panel {
+class AlarmControlPanel;
+}
+#endif
+
+#ifdef USE_EVENT
+namespace event {
+class Event;
+}
+#endif
+
+#ifdef USE_UPDATE
+namespace update {
+class UpdateEntity;
+}
+#endif
+
+/** Global registry for Controllers to receive entity state updates.
+ *
+ * This singleton registry allows Controllers (APIServer, WebServer) to receive
+ * entity state change notifications without storing per-entity callbacks.
+ *
+ * Instead of each entity maintaining controller callbacks (32 bytes overhead per entity),
+ * entities call ControllerRegistry::notify_*_update() which iterates the small list
+ * of registered controllers (typically 2: API and WebServer).
+ *
+ * Controllers read state directly from entities using existing accessors (obj->state, etc.)
+ * rather than receiving it as callback parameters that were being ignored anyway.
+ *
+ * Memory savings: 32 bytes per entity (2 controllers × 16 bytes std::function overhead)
+ * Typical config (25 entities): ~780 bytes saved
+ * Large config (80 entities): ~2,540 bytes saved
+ */
+class ControllerRegistry {
+ public:
+  /** Register a controller to receive entity state updates.
+   *
+   * Controllers should call this in their setup() method.
+   * Typically only APIServer and WebServer register.
+   */
+  static void register_controller(Controller *controller);
+
+#ifdef USE_BINARY_SENSOR
+  static void notify_binary_sensor_update(binary_sensor::BinarySensor *obj);
+#endif
+
+#ifdef USE_FAN
+  static void notify_fan_update(fan::Fan *obj);
+#endif
+
+#ifdef USE_LIGHT
+  static void notify_light_update(light::LightState *obj);
+#endif
+
+#ifdef USE_SENSOR
+  static void notify_sensor_update(sensor::Sensor *obj);
+#endif
+
+#ifdef USE_SWITCH
+  static void notify_switch_update(switch_::Switch *obj);
+#endif
+
+#ifdef USE_COVER
+  static void notify_cover_update(cover::Cover *obj);
+#endif
+
+#ifdef USE_TEXT_SENSOR
+  static void notify_text_sensor_update(text_sensor::TextSensor *obj);
+#endif
+
+#ifdef USE_CLIMATE
+  static void notify_climate_update(climate::Climate *obj);
+#endif
+
+#ifdef USE_NUMBER
+  static void notify_number_update(number::Number *obj);
+#endif
+
+#ifdef USE_DATETIME_DATE
+  static void notify_date_update(datetime::DateEntity *obj);
+#endif
+
+#ifdef USE_DATETIME_TIME
+  static void notify_time_update(datetime::TimeEntity *obj);
+#endif
+
+#ifdef USE_DATETIME_DATETIME
+  static void notify_datetime_update(datetime::DateTimeEntity *obj);
+#endif
+
+#ifdef USE_TEXT
+  static void notify_text_update(text::Text *obj);
+#endif
+
+#ifdef USE_SELECT
+  static void notify_select_update(select::Select *obj);
+#endif
+
+#ifdef USE_LOCK
+  static void notify_lock_update(lock::Lock *obj);
+#endif
+
+#ifdef USE_VALVE
+  static void notify_valve_update(valve::Valve *obj);
+#endif
+
+#ifdef USE_MEDIA_PLAYER
+  static void notify_media_player_update(media_player::MediaPlayer *obj);
+#endif
+
+#ifdef USE_ALARM_CONTROL_PANEL
+  static void notify_alarm_control_panel_update(alarm_control_panel::AlarmControlPanel *obj);
+#endif
+
+#ifdef USE_EVENT
+  static void notify_event(event::Event *obj);
+#endif
+
+#ifdef USE_UPDATE
+  static void notify_update(update::UpdateEntity *obj);
+#endif
+
+ protected:
+  static StaticVector<Controller *, CONTROLLER_REGISTRY_MAX> controllers;
+};
+
+}  // namespace esphome
+
+#endif  // USE_CONTROLLER_REGISTRY

esphome/core/defines.h

@@ -28,6 +28,7 @@
 #define USE_BUTTON
 #define USE_CAMERA
 #define USE_CLIMATE
+#define USE_CONTROLLER_REGISTRY
 #define USE_COVER
 #define USE_DATETIME
 #define USE_DATETIME_DATE
@@ -296,6 +297,7 @@
 #define USE_DASHBOARD_IMPORT
 
 // Default counts for static analysis
+#define CONTROLLER_REGISTRY_MAX 2
 #define ESPHOME_COMPONENT_COUNT 50
 #define ESPHOME_DEVICE_COUNT 10
 #define ESPHOME_AREA_COUNT 10

esphome/core/helpers.h

@@ -869,67 +869,6 @@ template<typename... Ts> class CallbackManager<void(Ts...)> {
   std::vector<std::function<void(Ts...)>> callbacks_;
 };
 
-template<typename... X> class PartitionedCallbackManager;
-
-/** Helper class for callbacks partitioned into two sections.
- *
- * Uses a single vector partitioned into two sections: [first_0, ..., first_m-1, second_0, ..., second_n-1]
- * The partition point is tracked externally by the caller (typically stored in the entity class for optimal alignment).
- *
- * Memory efficient: Only stores a 4-byte pointer. The partition count lives in the entity class where it can be
- * packed with other small fields to avoid padding waste.
- *
- * @tparam Ts The arguments for the callbacks, wrapped in void().
- */
-template<typename... Ts> class PartitionedCallbackManager<void(Ts...)> {
- public:
-  /// Add a callback to the first partition.
-  void add_first(std::function<void(Ts...)> &&callback, uint8_t *first_count) {
-    if (!this->callbacks_) {
-      this->callbacks_ = make_unique<std::vector<std::function<void(Ts...)>>>();
-    }
-
-    // Add to first partition: append then swap into position
-    this->callbacks_->push_back(std::move(callback));
-    if (*first_count < this->callbacks_->size() - 1) {
-      std::swap((*this->callbacks_)[*first_count], (*this->callbacks_)[this->callbacks_->size() - 1]);
-    }
-    (*first_count)++;
-  }
-
-  /// Add a callback to the second partition.
-  void add_second(std::function<void(Ts...)> &&callback) {
-    if (!this->callbacks_) {
-      this->callbacks_ = make_unique<std::vector<std::function<void(Ts...)>>>();
-    }
-
-    // Add to second partition: just append (already at end after first partition)
-    this->callbacks_->push_back(std::move(callback));
-  }
-
-  /// Call all callbacks in the first partition.
-  void call_first(uint8_t first_count, Ts... args) {
-    if (this->callbacks_) {
-      for (size_t i = 0; i < first_count; i++) {
-        (*this->callbacks_)[i](args...);
-      }
-    }
-  }
-
-  /// Call all callbacks in the second partition.
-  void call_second(uint8_t first_count, Ts... args) {
-    if (this->callbacks_) {
-      for (size_t i = first_count; i < this->callbacks_->size(); i++) {
-        (*this->callbacks_)[i](args...);
-      }
-    }
-  }
-
- protected:
-  /// Partitioned callback storage: [first_0, ..., first_m-1, second_0, ..., second_n-1]
-  std::unique_ptr<std::vector<std::function<void(Ts...)>>> callbacks_;
-};
-
 /// Helper class to deduplicate items in a series of values.
 template<typename T> class Deduplicator {
  public:

tests/components/api/common-base.yaml

@@ -178,6 +178,14 @@ api:
               - logger.log: "Skipped loops"
         - logger.log: "After combined test"
 
+event:
+  - platform: template
+    name: Test Event
+    id: test_event
+    event_types:
+      - single_click
+      - double_click
+
 globals:
   - id: api_continuation_test_counter
     type: int