During March 2025, Jeon delivered security and reliability enhancements across the valkey-io/valkey-search and valkey-io/valkey repositories. He implemented Access Control List support for Valkey Search, introducing C++ ACL logic and unit tests to enable fine-grained permission checks for core commands, which supports multi-tenant access and reduces unauthorized access risks. In valkey-io/valkey, Jeon addressed a crash issue in VM_GetCurrentUserName by adding robust null checks in C, ensuring the function safely returns NULL when context, client, or user data is missing. His work demonstrated depth in C/C++ programming, error handling, and build system integration, improving overall system reliability.