Matt Pocock shared a /grill me agent skill:

Interview me relentlessly about every aspect of this plan until we reach a shared understanding. Walk down each branch of the design tree resolving dependencies between decisions one by one.

If a question can be answered by exploring the codebase, explore the codebase instead.

For each question, provide your recommended answer.

Incredibly simple, but the times I’ve used it so far it has been incredibly effective. (Almost annoyingly considering the amount of follow up questions you get; for a good cause!)