Zero Hallucination, by Construction: Hallucination-Aware Layered Oversight for Trustworthy Enterprise AI
This paper introduces HALO (Hallucination-Aware Layered Oversight), a six-layer assurance architecture that achieves "zero hallucination" not by eliminating the inherent limitations of large language models, but by enforcing a system-level framework of grounded generation, constrained execution, multi-signal verification, calibrated abstention, total traceability, and continuous oversight to contain hallucinations as a manageable failure mode.