Meridian: Forensic RAG Measurement Framework
Created a measurement framework to evaluate whether an AI document search system actually works and to catch its own measurement bugs. The system splits scoring into two independent layers, including a deterministic grading layer without AI-graded AI and a separate AI-judged layer for answer quality. It reports accuracy improvements versus an industry baseline and includes transfer to another dataset domain. • Measured performance on a legal benchmark of ~800 questions over ~79M characters • Implemented two-layer scoring to prevent improvements from being mistaken for measurement glitches • Tuned retrieval to increase accuracy from 26% to 75% versus a baseline • Transferred the evaluation approach to a medical dataset without retuning