Home Assistant app: a local network scanner that finds, recognizes and explains every device on your LAN (name, brand, model, presence, latency). No cloud, no accounts.
Fingerprint the exact GPU you're running on, even among identical GPUs, from the order its atomic adds land in. 99.1% accuracy, survives reboots, can't be faked, and a default torch.index_add_ call leaks it.