January 2026 monthly summary for facebook/sapling. Key feature delivered: Sharding Configuration Enhancements (Thrift Synchronization, Process Names, Regions) aimed at improving shard management, consistency, and scalability. This work ensures thrift definitions are synchronized across sharding components and introduces structures for process names and regional scoping to support future shard reconfiguration without service disruption. Major bugs fixed: No explicit major bug fixes were logged this month; the focus was on feature delivery and configuration synchronization. If minor issues were addressed, they were under the scope of the thrift-updater tooling and code review cycle rather than user-visible bugs. Overall impact and accomplishments: Strengthened sharding reliability and deployment velocity by aligning thrift schemas across services, reducing risk of misconfiguration during shard scaling, and enabling faster rollout of sharding-related changes. The change set consolidates config consistency and prepares groundwork for regional sharding strategies across the repository. Technologies/skills demonstrated: Thrift schema synchronization, configerator-thrift-updater tooling, cross-repo coordination, code review and integration (Reviewed By: chiara125), and Git-based change management (commit 487426af26460f08f11ce5aee20d75745080e509; Differential Revision: D90631167).