I don't think that's true. I've seen at least one other person bring up the CIA in all the "theorycrafting" about this incident. If there's a mystery on HN, likelihood is high of someone bringing up intelligence agencies. By their nature they're paranoia-inducing and attract speculation, especially for this sort of community. With my own conspiracy theorist hat on, I could see making deals with the Saudis regarding cutting edge AI tech potentially being a realpolitik issue they'd care about.

I'm sure they are completely hands-off about breakthrough strategic tech. Unless it's the Chinese or the Russians or the Iranians or any other of the deplorables, but hey, if it's none of those, we rather have our infiltrants focus on tiktok or twitter ... /s