During February 2025, Az Denka focused on backend stability within the redis/redis repository, addressing a nuanced issue in the XREAD command’s handling of stream entries after deletions. By replacing the use of last_id with streamLastValidID, Az ensured that XREAD correctly identified the last valid entry, even in edge cases where entries had been removed. This solution, implemented in C and leveraging deep knowledge of Redis internals and database management, was reinforced with targeted regression tests written in Tcl to prevent future regressions. The work demonstrated careful attention to correctness and maintainability, contributing a robust fix to a core Redis feature.