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Phase 6 — Events + Rule Engine: - EventProcessor subprocess: subscribes to all MQTT events, logs to DB, evaluates rules, fires alert actions - ArmStateFSM: DISARMED/ARMED_HOME/ARMED_AWAY with PIN verification (HMAC-safe), DB persistence, MQTT state publishing - RuleEngine: AND/OR logic, 4 condition types (arm_state, sensor_event, camera_motion, time_window), per-rule cooldown tracking - SSE event stream with subscriber queue pattern and keepalive - Event acknowledge endpoint Phase 7 — Sensor Bridge: - SensorBridge subprocess: subscribes to Zigbee2MQTT, normalizes payloads (contact, occupancy, temperature, humidity, battery, linkquality) - GPIOHandler: conditional gpiozero import, callbacks for reed switches and PIR sensors - SensorRegistry: maps Zigbee addresses and names to config sensor IDs - SensorEvent/SensorState dataclasses - Web UI now shows real sensor states from DB Phase 8 — UPS Monitor: - UPSMonitor subprocess: polls NUT via pynut2 with reconnect backoff - State transition detection: OL→OB (power_loss), charge/runtime thresholds (low_battery, critical), OB→OL (restored) - ShutdownSequence: ordered shutdown with configurable delay and command - All conditionally imported (pynut2, gpiozero) for non-target platforms Fixed test_db fixture to use isolated engines (no global singleton leak). 96 tests passing. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>