During March 2026, Sparksy64 developed a CacheControl feature for the Bedrock Converse API within the JetBrains/koog repository, focusing on prompt caching for Assistant, User, and System messages. By introducing explicit cache blocks and automatic caching, Sparksy64 enabled the API to reduce redundant calls and standardize cache handling across the prompt pipeline. The implementation integrated cache metadata to support provider-agnostic strategies and laid the groundwork for future enhancements. Collaborating with Nick Sparks, Sparksy64 applied skills in Kotlin, API development, and integration testing, delivering a technically robust solution that improves efficiency and scalability in prompt processing without addressing bug fixes.