Month: 2026-07 — Optuna repository (optuna/optuna) documentation improvements focusing on pruning behavior. Delivered targeted updates clarifying n_warmup_steps for MedianPruner and PercentilePruner, improving user understanding of when pruning checks occur and that steps start at zero. Updated docstrings to remove language implying consecutive steps and to define the disabled period. These changes reduce user confusion, support correct usage, and contribute to more reliable pruning behavior in practice. No major bugs fixed this month; the focus was on documentation quality to accelerate adoption and reduce support load. Technologies/skills demonstrated include Python docstring standards, cross-file documentation updates, and collaborative editing (Co-authored-by).