LLM Eval Set Builder Prompt

Design a 30-case evaluation set for the task below.
Cover: 18 typical cases, 8 edge cases, 2 malformed inputs, 2 that must be refused.
For each case give: id, input, expected output or acceptance criteria, and the failure mode it probes.
Return as a markdown table.

Task: {{task}}
Output contract: {{contract}}

Replace the {{fields}} with your own context and tighten the rules to match your domain.