Hi, this is a really great lib.

Trying to understand the intended use cases, outside of webtorrent. From the top of my mind:

• open and read a file locally
• send and stream a local file to another browser using webrtc
• open a file downloaded from a remote server
• render live some file while being worked in the browser (like md->pdf)

Most of the use cases are relying on ReadableStream from browser API, I think. Is some kind of bridge between nodejs ReadableStream envisioned? That would need more fined grained API (to handle precache for instance).