shell-history-hygiene — Shell-History Audit + Targeted Cleanup When to invoke - User explicitly asks to audit / clean / dedup / prune their shell history (atuin or otherwise) - User pasted an ad-hoc one-liner and asked for review or improvement - Before any history-store migration (atuin → atuin v2, zsh-only → atuin, etc.) where you want a clean baseline - During machine-setup audits where the history corpus is being inspected for size or quality Backends - atuin (current): , , - zsh native (future): line dedup, size limits - bash native (future): line dedup - mcfly (future): mcfly's own prun…