Tools such as this should not be used. The generated commit messages are all noise, no signal. The LLM can not possibly describe why a change was made, and it can never describe why a corresponding more obvious change was not made.

Should you somehow find yourself in a situation where the above does not hold, and you really want the LLM description, it is still bad design to run the LLM on commit. LLMs will only get better over time. In that case you should not use commit messages but run the LLM on "git log" instead.

Just as it uses heuristics to show moved files it is also the more suitable place to summarize the diff, if that is all you place in the commit message field anyway. At that stage it has potential knowledge of the future as well, with that added context the summary might actually be useful ("this functionality is later replaced with ..").