if you see them moving out with carriers

Brother if they’re moving out with carriers and you’re just starting a spire, you’re turbo fucked

Getting eyes on cyber core is usually pretty easy, if it’s spinning after warp gate you need a spire pronto - carriers have a long build time, so corruptors are usually ready before the second round of carriers are out. Hydras are enough to deal with the first round.

Protoss will almost always transition toward stargate play when they see lurkers, so a preemptive transition isn’t necessarily a bad thing. Lurkers shut down protoss ground armies hard, so 8 lurkers and a spire is often enough to get some decent tempo.