Presence signals should reveal only what is necessary. Prefer coarse zones over exact coordinates, and combine multiple hints like router presence, motion, or Bluetooth rather than broadcasting journeys. Share dashboards thoughtfully, and let guests opt into visibility, not inherit it silently.
Automating a lock is powerful; restrain it with layered checks. Require presence from known phones, a disarm code, or a time window. Notify immediately on failures, and always keep a physical key path clear, respecting emergencies, visitors, and changing daily plans.
Power blips and internet outages happen. Put your hub and networking gear on backup power, set conservative defaults, and document manual overrides. If the cloud is unreachable, crucial lighting and safety routines should still work, even if extras pause politely.