From ee1da106142eb973ece2376d9d2106f0ce438ade Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Wed, 25 Mar 2026 14:32:51 -1000
Subject: [PATCH] Remove unused trigger_ back-pointer from Automation

The trigger_ field was only set in the constructor and never read
afterward. Removing it saves 4 bytes per Automation instance.
---
 esphome/core/automation.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/esphome/core/automation.h b/esphome/core/automation.h
index 021e9ec68e..6e1abcef55 100644
--- a/esphome/core/automation.h
+++ b/esphome/core/automation.h
@@ -471,7 +471,7 @@ template<typename... Ts> class ActionList {
 template<typename... Ts> class Automation {
  public:
   Automation() = default;
-  explicit Automation(Trigger<Ts...> *trigger) : trigger_(trigger) { this->trigger_->set_automation_parent(this); }
+  explicit Automation(Trigger<Ts...> *trigger) { trigger->set_automation_parent(this); }
 
   void add_action(Action<Ts...> *action) { this->actions_.add_action(action); }
   void add_actions(const std::initializer_list<Action<Ts...> *> &actions) { this->actions_.add_actions(actions); }
@@ -488,7 +488,6 @@ template<typename... Ts> class Automation {
   int num_running() { return this->actions_.num_running(); }
 
  protected:
-  Trigger<Ts...> *trigger_{nullptr};
   ActionList<Ts...> actions_;
 };