Chris Jakins developed a flexible HTTP header configuration feature for the bazelbuild/bazel repository, focusing on improving remote cache request handling. He merged header categories and enabled per-header customization, allowing users to send --remote_cache_headers to HTTP caches and align remote_cache_header and remote_exec_header with backend requirements. Working primarily in Java and leveraging his API development and backend skills, Chris implemented comprehensive tests for new header configurations and edge cases, and updated documentation to reflect these changes. This work enhanced interoperability with various HTTP caches, reduced configuration friction, and contributed to more reliable remote caching for continuous integration and large-scale builds.