I posted Mysti here a couple months ago and got a lot of feedback that shaped where I took it. Quick recap: it's a VS Code extension that lets you use multiple AI coding agents through one interface, including having them collaborate on problems.
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.