add type relay

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")