Validate Platform constant up to date

homeassistant/components/mqtt/tag.py

@@ -43,6 +43,8 @@ LOG_NAME = "Tag"
 
 TAG = "tag"
 
+PARALLEL_UPDATES = 0
+
 DISCOVERY_SCHEMA = MQTT_BASE_SCHEMA.extend(
     {
         vol.Optional(CONF_DEVICE): MQTT_ENTITY_DEVICE_INFO_SCHEMA,

homeassistant/const.py

@@ -75,6 +75,7 @@ class Platform(StrEnum):
     SWITCH = "switch"
     TEXT = "text"
     TIME = "time"
+    TAG = "tag"
     TODO = "todo"
     TTS = "tts"
     UPDATE = "update"

script/hassfest/manifest.py

@@ -342,6 +342,15 @@ def validate_manifest(integration: Integration, core_components_dir: Path) -> No
             "manifest", "Domain collides with built-in core integration"
         )
 
+    if (
+        integration.manifest.get("integration_type") == "entity"
+        and integration.domain not in Platform
+    ):
+        integration.add_error(
+            "manifest",
+            "Integration should be added to Platform constant in homeassistant/const.py",
+        )
+
     if domain in NO_IOT_CLASS and "iot_class" in integration.manifest:
         integration.add_error("manifest", "Domain should not have an IoT Class")