The license itself may be present in the cache folder.

Alternatively, ChatGPT might happily disclose authorship and licensing if asked.

I'm not convinced of the argument that the fact that it is not bundled at download or even at install-time, would free them of the GPL responsibilities. And at this point.

I'm also not sure HOW the devs bundled libreoffice, whether they just mentioned in a prompt (use libreoffice), or whether they hardcoded a command (like apt install libreoffice), more likely the former, considering the recursive vibecoding nature of this software.

Whole lotta words to say that I don't know whether this is a GPL violation, but interested in the answer. If it is a violation, the likely fix will probably be yet another prompt that says something like "comply with licensing", which probably already exists, so a more specific "provide attribution (in a way that doesn't bother the user)"