My understanding is that a terminal multiplexer consists of three parts: 1. Managing shells and windows 2. Parsing the ECMA-35/ECMA-48 escape/control sequences 3. Rendering the shells' parsed output within their window boundaries

> Can you share some resources etc on what could a good starting point if I want to explore this as a side-project?

I'm still looking for resources myself. Check out JdeBP's comment for some good information https://news.ycombinator.com/item?id=22847168