Are prompt packs worth buying in 2026?

Most aren't — free lists cover generic use. A prompt pack earns its price only if it's annotated: when each prompt works, what output to expect, and how it fails. Tested, failure-annotated prompts save real debugging time for people running agents on production work; untested collections just move words around. Evaluate any pack by asking one question: did the author run these prompts on real work, and do they tell you where the prompts break?