[zzrrt]

I heard "belt and suspenders" at least 20 years ago (meaning multiple solutions to a problem with backup in case one fails), and maybe would be longer if I were older. You could blame Claude for overusing it or importing it to other cultures maybe, but it's not in the category of invented phrases or ones that only barely mean something in the specific context Claude used them.

[sgerenser]

Yeah I've definitely heard belt-and-suspenders since way before LLMs were a thing. Probably even used it once or twice myself.