March 2026 monthly summary for tenstorrent/tt-umd focusing on architecture-specific memory barrier enhancements and cross-core synchronization for Blackhole, with preserved behavior on other architectures. Delivered a targeted DRAM L1 barrier improvement and prepared groundwork for broader DRAM barrier usage.

September 2025 monthly summary for tenstorrent/tt-metal: Delivered three high-impact updates that strengthen data integrity, reliability, and debugging across the dispatch subsystem and multi-device workloads. Key features include robust Event Command Handling and Padding Across Devices with per-process random padding and host-side validation; Dispatcher Data Robustness and Debugging with improved kernel tracking, bounds checks, and error handling; and Dispatcher State Reporting and Debugging Tools introducing a triage-friendly script to surface dispatcher state, ringbuffer progress, and worker activity. Major bugs fixed include enhanced event data validation to prevent ordering corruption, explicit out-of-bounds protection, and richer debugging information around event ordering. Overall impact: improved cross-device correctness, faster issue diagnosis, and deeper observability, enabling safer multi-card deployments and reduced downtime. Technologies demonstrated: low-level systems programming (C/C++/Rust) for event handling, Python tooling for state reporting, expanded logging, and CI-aligned post-commit workflows.