During June 2025, this developer focused on enhancing memory safety and stability in the arceos-hypervisor/arceos repository, addressing a critical memory management issue in the task extension lifecycle. By introducing a weak symbol for task extension drop and implementing explicit deallocation logic in Rust, they ensured that task extension structures are properly released, preventing memory leaks under extension-heavy workloads. Their work demonstrated strong low-level programming and memory management skills, with changes scoped to a single, traceable commit for maintainability. Although no new features were added, the depth of the bug fix established a reliable foundation for future extension capabilities and audits.