January 2026 – PrefectHQ/prefect. Delivered a targeted enhancement to global concurrency management: Decay Rate Customization for Upsert Operations. This feature allows specifying the decay rate when upserting the global concurrency limit, applied consistently across both synchronous and asynchronous clients. The change enables finer-grained resource control, improving throughput and resource utilization under load, and aligning client behavior across interfaces. No major bug fixes were reported this month; the focus was on extending API capabilities while maintaining stability. Overall impact includes more predictable concurrency, better scalability, and improved user control over limits. Technologies demonstrated include Python core development, API design for upsert paths, and cross-client consistency in concurrency features.