During November 2025, Pablo focused on improving cache reliability in the fastly/js-compute-runtime repository by addressing a bug in CoreCache surrogate key initialization. He identified and resolved an issue where surrogate keys were not being correctly added or processed, which could have led to incorrect cache behavior. Using C++ and leveraging his expertise in cache management and performance optimization, Pablo updated the iterator initialization logic to ensure surrogate keys were handled as intended. He validated the fix with targeted tests, enhancing the stability and correctness of CoreCache workflows. This work contributed to improved runtime behavior and reduced risk of cache inconsistencies.