Systems curriculum with small interactive demos in the browser.

Video-only courses don't stick for me. Olam maps topics from HTTP basics through deploy and React internals, with tiny simulators next to the text so you can poke the idea instead of only reading it.
Next.js App Router with doc graph and sticky mission column
Interactive modules: event loop, CAP theorem, load balancer, C10k, UTF-8, concurrency locks
Markdown syllabus + curriculum export alongside the web shell
Why embed demos in the docs?
Keeps the explanation and the toy model on one screen. Separate lab repos mean more repo switching than most people will do.