[jewel]

I believe it's a reference to a joke meme that goes something like "Write Windows 12 from scratch. Make no mistakes." At least that's the first context I heard it in.

[greenavocado]

Precisely

[rvz]

You are "not allowed" to make that joke here. [0] and you probably upset a bunch of grumpy meanies.

[0] https://news.ycombinator.com/item?id=48838228