This repository is a sample application for the Google Home Local SDK, demonstrating how to create a local fulfillment for a smart light device. It consists of three main parts: the local home app (in the `app` directory) that discovers and controls the device using various network protocols (UDP, mDNS, UPnP for discovery; UDP, TCP, HTTP for control); a virtual device (in the `device` directory) that simulates a smart light using the Open Pixel Control (OPC) protocol and supports the same discovery and control protocols for testing; and a Cloud Function (in the `functions` directory) that acts as a placeholder for the cloud-to-cloud backend, handling account linking and returning placeholder responses for SYNC and QUERY intents (while deferring EXECUTE and QUERY to the local fulfillment). The local home app uses a strategy pattern to delegate discovery and execution handling to protocol-specific implementations. The virtual device encapsulates the OPC protocol logic in a reusable component that is independent of the underlying transport mechanism.