Both slide PDF and source code are now online for my #LibrePlanet2019 talk "Computational Symbiosis: Methods That Meld Mind and Machine":

https://mikegerwitz.com/talks#cs4m

This year, I tried to commit much more frequently than in past years (see Git history) to demonstrate how I use Org mode to track the progress of sections of my talk and outline the work I need to do. I'll write about it some time.