Something like this that I know of, in a very simplified form.

> twtxt is a decentralised, minimalist microblogging service for hackers.

> So you want to get some thoughts out on the internet in a convenient and slick way while also following the gibberish of others? Instead of signing up at a closed and/or regulated microblogging platform, getting your status updates out with twtxt is as easy as putting them in a publicly accessible text file. The URL pointing to this file is your identity, your account. twtxt then tracks these text files, like a feedreader, and builds your unique timeline out of them, depending on which files you track. The format is simple, human readable, and integrates well with UNIX command line utilities.

https://github.com/buckket/twtxt

I have used this format a little bit when I first found out about it. But haven’t felt like adding any more entries to my twtxt file beyond the ones that I added to it in the first couple of days of having set it up.