During March 2026, this developer focused on backend reliability for the alibaba/MNN repository, addressing a critical issue in the LLM prefix disk cache. Using C++ and leveraging expertise in cache management and file handling, they delivered a targeted bug fix that ensured the prefix disk cache loaded correctly after the first response. Their approach included implementing a verification mechanism for sync files and enforcing the creation and validation of prefix cache files. This work improved caching reliability and system resilience, particularly under high-load LLM scenarios, resulting in more consistent response times and reducing the risk of cache-related failures in production environments.