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PROMPT-ENGINEERING5 MIN READ

From Persona Costume to Review Role

Transform a vague persona prompt into a role prompt with responsibilities and checks.

Jordan is revising a vendor-risk prompt. What changed from the before prompt to the after prompt? Before: a dramatic expert persona. After: a bounded reviewer role. The role changed from status to responsibility: "expert" became "vendor-risk reviewer," so the model knows the job it is performing. The evidence boundary changed from open-ended advice to memo-and-checklist only, which reduces unsupported claims. The output changed from a verdict to review sections: risks, missing evidence, and questions. That keeps the human decision owner in control. A strong role prompt defines work, not theater. Role prompt design Converted a vague persona into a review…

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