The "change one thing, leave the rest untouched" failure is the one that bites hardest in real work. Reports and briefs get quietly rewritten when you only asked for a small edit.

One habit that helps: put the failure path into the template itself. For example, "If two sources disagree on a number, leave it blank and flag Conflict. Do not average or invent." And keep the verified facts (dates, deadlines, rules) in a pinned block that the model must copy verbatim. That way a late edit can't silently drop them, and you only review the diff instead of re-reading everything.