Security Plan – Zero-UI Home Automation (2025)

Purpose

Provide awareness without chaos. Arming is explicit and minimal. Family experience must remain calm; security must not depend on cloud services.

Clear, few modes (home / away / optionally armed)
Reliable detection from hardwired contacts and select motion; AI only filters, never decides
Actionable, rate-limited alerts only when necessary
Safe behavior when services or sensors fail

Primary: hardwired door/window contacts; selected hardwired motion in perimeter/entry
Secondary: camera AI classes (person/package/vehicle) as filters; network/phone presence as hints only
Arming states: explicit, operator-set; never inferred from a single signal

Mode handling: home/away/armed are explicit; no mode explosion
Perimeter: door/window open in armed/away → actionable alert (rate-limited); in home → silent unless safety
Entry delay (optional): short grace on primary entry door when armed; cancelled by disarm
Motion (security zones): in armed/away, only if paired with perimeter trigger or high-confidence AI; avoid motion-only alerts
Cameras/AI: used to filter/annotate events, not to drive primary actions

Security triggers may “assist on” path lights (low impact) when armed/away; never override manual control
No aggressive offs linked to security states; lighting follows occupancy rules

Allowed only when actionable: perimeter breach while armed/away; camera person/package/vehicle when armed/away; door left open in away after long timer
Rate-limit and debounce every class; suppress repeats
No motion-only or noise-only alerts

Cloud/AI down → ignore those signals; rely on hardwired sensors only
Sensor stale/offline → no false vac/arm; prefer silence and do nothing
HA/MQTT restart → physical security (locks/contacts) unaffected; automations resume without manual reset
Internet outage → local behavior intact; no alert spam

Observe: log security-relevant events; no alerts
Assist: annotate events with AI classes; operator review only
Alert: enable actionable, rate-limited alerts in away/armed; verify delays and paths