Watched this end to end and find it both inspirational and theraputic. I particularly like your hunt for the 4 -> IV error where you make a number of improvements but fail to catch the bug. And then again as you start to add more and more tests which just keep passing.

Ever considered about talking through your thought processes as you code. I find it incredibly challenging and somewhat unnerving to try and explain what I’m thinking as I code.

Great work and nice to see you persist until the end.