May 2026 Chalk-Go monthly summary: Delivered Backfill Job Configuration Enhancements via Protocol Buffers to support handling of empty tiles and metaplanner usage in aggregate backfill jobs. Added new fields in protobuf definitions and updated generated protos to align with the updated schema. No major bugs reported this month; focus remained on delivering a robust, scalable feature and maintaining code quality. Business value includes more flexible job configuration, improved edge-case handling, and reduced manual configuration, enabling smoother operation of large-scale backfills. Technologies demonstrated include Protocol Buffers, proto code generation, and repository maintenance for chalk-ai/chalk-go, with an emphasis on backward-compatible changes and future feature readiness.