Ask HN: What have you reverse engineered with LLMs recently?

There are a few stories lately of people doing this and I thought it was worth asking outright.

Have you unlocked any new functionality in things you own? Have you extended the life of old hardware?

I'm a bit of a tech hoarder, I have a lot of old vintage stuff I would just love to breathe new life into. I'm keen to hear what people have done