For 2026-03, contributions to ethereum/go-ethereum centered on reliability improvements in the blockchain reorganization pathway. Key feature delivery this month involved a critical bug fix rather than new user-facing features. Major bugs fixed: Blockchain Reorganization Mutex Lock Leak Fix, which ensures the txLookupLock mutex is released on all error paths in the reorg() function, preventing potential deadlocks and improving node reliability during reorganizations. Commit reference: b6115e9a304cb771a3ad8383da3c61a61c6ce6cf (core: fix txLookupLock mutex leak on error returns in reorg() (#34039)). Impact and accomplishments: The fix reduces deadlock risk, enhances uptime and stability of blockchain operations under error conditions, and improves the robustness of transaction lookups during reorg events. This contributes to more predictable performance for RPC clients, wallets, and node operators during network topology changes. Technologies/skills demonstrated: Go, concurrency control (mutex handling), defensive error management, testing for edge/error paths, and code maintenance practices in a high-availability codebase. Business value: Higher node uptime, fewer stalled reorgs, and more reliable transaction processing, which translates to improved service levels for developers and end users relying on ethereum/go-ethereum.