add type relay

packages/home_capabilities/__init__.py

@@ -8,6 +8,8 @@ from packages.home_capabilities.contact_sensor import CAP_VERSION as CONTACT_SEN
 from packages.home_capabilities.contact_sensor import ContactState
 from packages.home_capabilities.temp_humidity_sensor import CAP_VERSION as TEMP_HUMIDITY_SENSOR_VERSION
 from packages.home_capabilities.temp_humidity_sensor import TempHumidityState
+from packages.home_capabilities.relay import CAP_VERSION as RELAY_VERSION
+from packages.home_capabilities.relay import RelayState
 from packages.home_capabilities.layout import DeviceTile, Room, UiLayout, load_layout
 
 __all__ = [
@@ -19,6 +21,8 @@ __all__ = [
     "CONTACT_SENSOR_VERSION",
     "TempHumidityState",
     "TEMP_HUMIDITY_SENSOR_VERSION",
+    "RelayState",
+    "RELAY_VERSION",
     "DeviceTile",
     "Room",
     "UiLayout",

packages/home_capabilities/relay.py

@@ -0,0 +1,21 @@
+"""
+Relay capability model.
+A relay is essentially a simple on/off switch, like a light with only power control.
+"""
+
+from pydantic import BaseModel, Field
+from typing import Literal
+
+# Capability version
+CAP_VERSION = "relay@1.0.0"
+DISPLAY_NAME = "Relay"
+
+
+class RelayState(BaseModel):
+    """State model for relay devices (on/off only)"""
+    power: Literal["on", "off"] = Field(..., description="Power state: on or off")
+
+
+class RelaySetPayload(BaseModel):
+    """Payload for setting relay state"""
+    power: Literal["on", "off"] = Field(..., description="Desired power state: on or off")