alt Hacker NewsWrite it in something like Google docs that tracks changes and then share the link with the revision history.
If this is insufficient, then there are tools specifically for education contexts that track student writing process.
Detecting the whole essay being copied and pasted from an outside source is trivial. Detecting artificial typing patterns is a little more tricky, but also feasible. These methods dramatically increase the effort required to get away with having AI do the work for you, which diminishes the benefit of the shortcut and influences more students to do the work themselves. It also protects the honest students from false positives.
Thought it is a good idea at first, but can easily be defeated with typing out AI contents. One can add pauses/deletions/edits or true edits from joining ideas different AI outputs.