its AI annotations overlaid on any text you want, including LLMs. Its an interesting direction as I find myself skimming text and not thinking for myself lately, especially AI-generated text.
The interface also allow to comment, post and interact with the original HN platform. Credentials are stored locally and are never sent to any server, you can check the source code here: https://github.com/GabrielePicco/hacker-news-rich.