↳ In-reply-to » @eapl.me There are several points that I like, but I want to highlight number 7. https://text.eapl.mx/a-few-ideas-for-a-next-twtxt-version #twtxt

looks good to me!

About alice’s hash, using SHA256, I get 96473b4f or 96473B4F for the last 8 characters. I’ll add it as an implementation example.
The idea of including it besides the follow URL is to avoid calculating it every time we load the file (assuming the client did that correctly), and helps to track replies across the file with a simple search.

Also, watching your example I’m thinking now that instead of {url=96473B4F,id=1} which is ambiguous of which URL we are referring to, it could be something like:
{reply_to=[URL_HASH]_[TWT_ID]} / {reply_to=96473B4F_1}
That way, the ‘full twt ID’ could be 96473B4F_1.