qrexec mechanism is tricky. The documentation runs through some examples of how the various parts fit together, but I thought it might be easier to understand with some sequence diagrams.
I'm working with the Freedom of the Press Foundation these days, migrating the journalist interface of SecureDrop away from a processes involving mutiple laptops running tails to a single machine running Qubes. It's been exciting work, especially since Qubes is in the middle of releasing a new major version, which we've decided we want to target.
I’ve been baking wild-fermented sourdough for a number of years. Some friends have individually asked about my process, so I thought I’d share it publicly.