What problem does it solve? Automated evaluation of LLM outputs is unreliable when judges suffer from position bias, length bias, and inconsistent scoring. This Skill provides production-grade patterns for building LLM-as-judge systems that produce consistent, calibrated, and human-correlated quality assessments. ## Core Features & Use Cases - Direct Scoring & Pairwise Comparison: Implement single-response scoring for objective criteria and pairwise comparison with position-swap mitigation for subjective preferences. - Bias Mitigation: Apply concrete techniques against position, length, self-enhancement, verbosity, and authority biases, including swap protocols and length-normalized scoring. - Rubric Generation: Generate domain-specific scoring rubrics with level descriptions, edge cases, and strictness calibration to reduce evaluation variance by 40-60%. - Use Case: When A/B testing two prompt variants, use the pairwise comparison pattern with position swapping to determine which variant produces better responses, with confidence calibrated to position consistency. ## Quick Start Ask the AI to compare two model responses to a prompt using pairwise comparison with position-swap bias mitigation and return a winner with calibrated confidence.