January 2026 monthly summary for mib1185/homeassistant-core focused on feature delivery and monitoring enhancements. Key feature delivered: Yolink Diagnostic Sensor Enhancements for the Yolink integration, introducing diagnostic sensors for battery and device temperature to improve device health visibility and monitoring reliability. This supports proactive maintenance and faster issue diagnosis for Yolink devices. Major bugs fixed: none reported this month. Overall impact: strengthens the Yolink integration with deeper telemetry, leading to improved uptime, user trust, and data-driven maintenance planning. Technologies/skills demonstrated: Python-based Home Assistant core integration development, sensor platform patterns, commit-driven changes, and emphasis on code quality and maintainability.