Worked on stabilizing the LMCache MP system in the jeejeelee/vllm repository, focusing on backend development and concurrent programming using Python. Addressed a critical race condition that caused block ID duplication in multi-tenant environments by implementing logic to skip writes to overlapping token positions and ensuring only new blocks were appended to the tracker. This approach enhanced data integrity management and reduced coordination overhead, resulting in improved system reliability and performance. The solution emphasized idempotent writes and eliminated overlapping-write risks, while thorough documentation and patch merging ensured long-term maintainability and traceability of the LMCache MP subsystem’s improvements.