There was a big git hoster (cough bitbucket cough) who didn’t have support for signed commits until a few months ago. But the signature is only considered good if the pubkey you uploaded contains the mail you use for logging in. Because surely no sane person would have more than one mail, right?
We manage our “food inventory” with Grocy which calls itself “the ERP beyond your fridge”. It basically tracks every single purchase and consumption of food and also each items best before date. It needs a bit initial setup and you need to remind yourself to checkout stuff you consume but then it’s just great. Not a single item spoiled because it got pushed too far back on the shelf. And since Grocy knows how much of what item we want in stock, it automatically writes our shopping lists with stuff which is about to run out.
So the shopping is basically day to day as we return from work and pass the store just ticking things off the list. And we made a rule for ourselves to only buy the stuff on the list, nothing extra to avoid impulse purchases.
If he continues to play deus ex human revolution, he will eventually learn why it didn’t work out that easily even in the future Detroit.