Advent of Code Automation Runner
Use commandbox.
install wdm-aoc
Use the following commands to learn how to use each command (aoc init, aoc input, aoc submit).
aoc init help
aoc input help
aoc submit help
The commands are working blazingly fast. However, I haven't included any docs on how I use the commands as part of my workflow.
Obviously, it is very trivial - doing it manually via the website is already easy enough. But taking this automation path did force me to think about my daily workflow, plus I learned a little more about creating custom commands for commandbox.