Will Hanlen focused on backend development for the urbit/vere repository, addressing HTTP caching correctness in C. He implemented a targeted fix that restricts the cache mechanism to engage only for GET requests, ensuring alignment with standard HTTP protocol semantics. By adding a method check within the caching path, Will prevented cache pollution from non-GET requests, thereby reducing the risk of stale data and improving data integrity for cached responses. This work demonstrated a precise understanding of HTTP and caching principles, resulting in a minimal yet effective change that enhanced the reliability of services depending on vere’s caching behavior.