The 280 char limit seems arbitrary, given you cant even keep the about page within that limit: https://textlog.cc/about
If you are going to limit it to short posts, maybe the length of a short post is the length to limit it to, rather than emulating the 2xSMS of every twitter clone?
Other than that, it looks really clean and neat - I just dont think being 280 chars adds anything other than resulting in people posting with pagination as per X 1/3.
I like the idea of a shorter character limit as it nudges users to a specific mode of interaction: short thoughts/updates and not long-winded soliloquies. It's signalling that interaction with this platform doesn't demand much of your time or attention. I don't know what the about page has to do with it, but you have to draw the line somewhere.
That said, I'm not a social media user besides HN I guess.
Honestly, I don't really care that much. The project looks like fun, and I wish you the best with it, but I don't really post on microblogging platforms myself.
I just wanted to give a bit of feedback as someone who reads them - and point out that on almost every twitter/bluesky submission to HN they are using ways to work around the 280/300 char limitations.
To play devils advocate - 500 also seems a bit arbitrary ;) If I were making a platform like this myself, I would go for a power of 2 that makes sense for storage/buffering. Maybe 1KiB including all meta, etc. You could comfortably fit a post the size of your about page, and all associated meta in that - even when serialised as JSON or something. I'd go from there and work backwards to come up with a size that has a real technical purpose.
"Some popular social networks such as X (formerly Twitter), Threads, Tumblr, Mastodon, and Bluesky can be viewed as collections of microblogs." https://en.wikipedia.org/wiki/Microblogging
If you are going to limit it to short posts, maybe the length of a short post is the length to limit it to, rather than emulating the 2xSMS of every twitter clone?
Other than that, it looks really clean and neat - I just dont think being 280 chars adds anything other than resulting in people posting with pagination as per X 1/3.