Board with [a mix of
domains]. The layout rules that
matter here: stack-up, return
paths, where to split planes or
not, and decoupling placement.

Layout Rules for This Board

Return paths and plane splits, stated for your actual mix.

Prompt

I'm laying out a board with [describe the mix — high speed digital, analog, power]. Give me the specific layout rules that matter here: stack-up, return paths, where to split or not split planes, and decoupling placement.