July 2026 Monthly Summary focusing on core features delivered and their business impact. Key deliverable: Prefix Cache Reuse Reporting (Full KV Cache Mode) in the jeejeelee/vllm repo. This work enables reporting of prefix-cache-reused blocks when KV cache report mode is set to 'full', improving observability and cache-traceability for large-scale inference workloads. Key achievements (top 3-5): - Delivered Prefix Cache Reuse Reporting (Full KV Cache Mode): new capability to report prefix-cache-reused blocks when KV cache report mode is 'full'. - Introduced a new event emission mechanism in the block pool to surface prefix-cache reuse events. - Updated request handling to support full report mode and ensure accurate reporting of cache utilization. - Added unit tests for the event emission logic for cached blocks to validate correctness and guard against regressions. - All work tied to commit e5588e49bc2642670116664a7fc4096e27adb179. Overall impact and accomplishments: - Improved observability into KV cache behavior, enabling precise tracking of cache reuse patterns and reducing debugging time for cache-related issues. - Enhanced reliability of cache reporting in full mode, supporting better capacity planning and performance tuning for high-throughput inference workloads. - Demonstrated end-to-end delivery with proper test coverage and maintainable code changes in core KV events and request handling. Technologies/skills demonstrated: - Event-driven design and integration within core KV events (block pool). - Request handling updates for new reporting mode. - Unit testing for event emission logic and block-cached scenarios. - Code quality and collaboration evidenced by signed-off commits and multi-author contributions.