[jampekka]

> I don't get why everyone ignores this aspect, since I find it extremely useful all the time.

My hunch is because structured/constrained decoding and deterministic subsystems are technically somewhat more involved, requiring e.g. raw API interactions and sometimes manual decoding strategies. Prompt systems can be written in plain text and mostly with "common sense". Not to say writing a good prompt(system) is a trivial task, but it's a different skillset.

[sigmoid10]

Not really. Most big model providers offer structured output decoding in their APIs. But you still have to do some actual programming and design at the end of the day instead of pure vibe-prompting.