diff --git a/.clang-tidy.hash b/.clang-tidy.hash
index 72a99675909..bc8cd1dacdc 100644
--- a/.clang-tidy.hash
+++ b/.clang-tidy.hash
@@ -1 +1 @@
-075ed2142432dc59883bb52db8ac11270f952851d6400deae080f5468c7cb592
+88bba93420f1dbc8c64a555c631195a8dc9544e6dc98ae45ac04978206c01bd7
diff --git a/esphome/components/esp8266/__init__.py b/esphome/components/esp8266/__init__.py
index 34540bd48da..7e593bf61ad 100644
--- a/esphome/components/esp8266/__init__.py
+++ b/esphome/components/esp8266/__init__.py
@@ -264,7 +264,16 @@ async def to_code(config):
     cg.add_platformio_option("platform", conf[CONF_PLATFORM_VERSION])
     cg.add_platformio_option(
         "platform_packages",
-        [f"platformio/framework-arduinoespressif8266@{conf[CONF_SOURCE]}"],
+        [
+            f"platformio/framework-arduinoespressif8266@{conf[CONF_SOURCE]}",
+            # Override the ancient tool-esptoolpy ~1.30000.0 pinned by
+            # platform-espressif8266 4.2.1 with the same 5.x build the
+            # pioarduino ESP32 platform uses, so both platforms share the
+            # same installed package and stop reinstalling on every switch.
+            # The 0.0.1 path component is pioarduino's stable registry
+            # release tag (not the tool version); the tool itself is 5.2.0.
+            "pioarduino/tool-esptoolpy@https://github.com/pioarduino/registry/releases/download/0.0.1/esptoolpy-v5.2.0.zip",
+        ],
     )
 
     # Default for platformio is LWIP2_LOW_MEMORY with:
diff --git a/esphome/core/component.h b/esphome/core/component.h
index 44c24e13d20..808aace5218 100644
--- a/esphome/core/component.h
+++ b/esphome/core/component.h
@@ -602,7 +602,7 @@ class Component {
  */
 class PollingComponent : public Component {
  public:
-  PollingComponent() : PollingComponent(0) {}
+  PollingComponent() : PollingComponent(1) {}
 
   /** Initialize this polling component with the given update interval in ms.
    *
diff --git a/platformio.ini b/platformio.ini
index e2c7e2b097d..d98d584b2e6 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -105,6 +105,13 @@ extends = common:arduino
 platform = platformio/espressif8266@4.2.1
 platform_packages =
     platformio/framework-arduinoespressif8266@~3.30102.0
+    ; Override the ancient tool-esptoolpy ~1.30000.0 pinned by
+    ; platform-espressif8266 4.2.1 with the same 5.x build the pioarduino
+    ; ESP32 platform uses, so switching between esp8266 and esp32 builds
+    ; does not reinstall tool-esptoolpy every time.
+    ; The 0.0.1 path component is pioarduino's stable registry release tag
+    ; (not the tool version); the tool itself is 5.2.0.
+    pioarduino/tool-esptoolpy@https://github.com/pioarduino/registry/releases/download/0.0.1/esptoolpy-v5.2.0.zip
 
 framework = arduino
 lib_deps =
diff --git a/requirements.txt b/requirements.txt
index 36c81e25bf9..1623876cb56 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ platformio==6.1.19
 esptool==5.2.0
 click==8.3.2
 esphome-dashboard==20260408.1
-aioesphomeapi==44.16.0
+aioesphomeapi==44.16.1
 zeroconf==0.148.0
 puremagic==1.30
 ruamel.yaml==0.19.1 # dashboard_import