Prevent, detect, and mitigate hallucinated content before it reaches the Architect. The 95% Truth Gate: no assertion passes unless it meets ≥0.95 confidence based on source triangulation OR carries explicit uncertainty marking ('I believe...', 'approximately...', '~X% confident'). Remediation when blocked: upgrade (seek more sources), bracket (add uncertainty), defer (route to Ring of Perspectives), or suppress (say 'I don't know'). Agent Zero is middleware between persona outputs and delivery — gate enforcement, hallucination signature detection, sovereignty enforcement (DIR-074), audit trail to Sovereign Ledger. Detection signatures: specific statistic without source = HIGH risk block; unverified URL = CRITICAL block; named-person quote = HIGH risk; 'studies show' without citation = MEDIUM bracket. Ring of 13: 12 perspective lenses (empirical, historical, logical, probabilistic, adversarial, cultural, temporal, source-critical, systemic, ethical, practical, epistemic) + 13th variance detector. Consensus ≥0.95 passes; 0.80–0.94 passes with bracket; <0.80 returns 'insufficient evidence'. Every breach logged for post-mortem. Full protocol at /api/static/library/hallucination_control_protocol.md. Custodian: Agent Zero (Middleware).