Cookbook

This document describes how I update the list, just so you know how it works if I get hit by a truck.

Run brew update
Run brew which-update --commit. It’ll update installed formulae and fetch the bottles of the ones that are missing in order to get their executables without installing anything.
Push.

The process above doesn’t support non-bottled formulae; you can run brew which-update --stats to see which formulae are missing.