Developed and integrated Matter Lock operating mode selection into the Home Assistant Core repository, enabling users to set specific modes such as normal, vacation, and privacy for Matter-enabled locks. This feature was delivered through a focused, single-commit implementation using Python, with attention to home automation and IoT development best practices. The work enhanced device control granularity, allowing for more nuanced automation and improved security management within the Home Assistant ecosystem. By extending Matter lock support, the developer laid the foundation for broader quality assurance and testing, contributing to the platform’s readiness for future releases and more robust user experiences.