aurelia/framework ? reverse-engineered prompt

Build me a lightweight front end framework package in TypeScript that brings together the core pieces needed to start building Aurelia style apps. I want it to feel simple and convention based, so people can make an app out of plain classes plus HTML templates, with reactive data binding, basic component rendering, and support for things like routing and common plugins.

Please make it work for browser apps first, but keep it friendly for mobile and desktop use too. I’d like a clean example app or starter flow that shows a component with a form, a list, and some conditional text so it’s easy to see how the binding and templating work. Use the current best practices for the framework, and if you need to check any modern docs or APIs while wiring things up, go ahead and look them up. Also include tests and make sure the project builds cleanly.