If we must stick to hashes for threading, can we maybe make it mandatory to always include a reference to the original twt URL when writing replies?

Instead of

 hello foo bar

you would have

(<a href="?search=123467" class="tag">#123467</a> http://foo.com/tw.txt) hello foo bar

or maybe even:

(<a href="?search=123467" class="tag">#123467</a> 2025-04-30T12:30:31Z http://foo.com/tw.txt) hello foo bar

This would greatly help in reconstructing broken threads, since hashes are obviously unfortunately one-way tickets. The URL/timestamp would not be used for threading, just for discovery of feeds that you don’t already follow.

I don’t insist on including the timestamp, but having some idea which feed we’re talking about would help a lot.