Worked on koreader/koreader and immich-app/immich, delivering three features over two months focused on reliability and maintainability. In koreader/koreader, reduced log noise from Kindle wakeups by adjusting log levels, improving monitoring clarity without hiding real issues. Enhanced reader location management by preventing errors when the location stack is empty, preserving original data during restoration, and simplifying retrieval logic for robustness. In immich-app/immich, updated microservices configuration to support flexible hosting using the IMMICH_HOST environment variable. Utilized Lua and TypeScript, applying skills in embedded systems, backend development, and code refactoring to deliver isolated, traceable, and low-risk improvements.