i've seen this fairly often with internal libraries as well - a recent AI-assisted PR i reviewed included a complete reimplementation of our metrics collector interface.
suspect this happened because the reimplementation contained a number of standard/expected methods that we didn't have in our existing interface (because we didn't need them), so it was considered 'different' enough. but none of the code actually used those methods (because we didn't need them), so all this PR did was add a few hundred lines of cognitive overhead.
suspect this happened because the reimplementation contained a number of standard/expected methods that we didn't have in our existing interface (because we didn't need them), so it was considered 'different' enough. but none of the code actually used those methods (because we didn't need them), so all this PR did was add a few hundred lines of cognitive overhead.