lemmy.world already has one: https://lemmy.world/u/tldrbot.
seems to work pretty good.

I've been posting niche stuff on a country instance.

I use a few sites to manually summarise the article, a majority I use SMMRY which is what the autotldr bot used to use.

I hated reddit with its lack of submission statements and I see similar happening around here. Some people are doing them and I love it, others refuse to so it's frustrating to decide to click through. Tildes.net gives you a word count so you know how much time you need to commit. I'm of the mind that a submission statement if summarised well can educate if people don't want to click through. A single title rarely helps anyone.

There should be some examples in my profile.

actual comment discussions

I sincerely hope that everything stays this way. Filtering, tagging and reporting users who constantly was posting those obnoxious low effort oneliners was basically becoming a full time job. It killed all the discussions in the bigger subs. It's already obvious on some of the bigger instances/communities that some users unfortunately just switched platform.

Personally I didn't like some of the popular bots like autotldr but I can see why other people did.

I think at this point there should be a LLM extension which does it quickly for you everytime you end up on an article.