Over two months, contributed to openclaw/openclaw and buape/carbon by delivering four features and resolving two bugs focused on backend and full stack development. Work included enhancing image understanding with automatic model selection, adding Chinese API endpoint support, and improving LAN security through TLS fingerprint verification. Addressed logging accuracy by implementing timezone-aware timestamps and expanded network flexibility in buape/carbon with pluggable fetch injection for proxy support and testing. Solutions were implemented using TypeScript and JavaScript, emphasizing API design, integration, and robust testing. The approach prioritized reliability, regional accessibility, and observability, aligning with project goals for secure, maintainable, and testable systems.