Pre-trade integrity gate for AI agents on prediction markets. ONE call returns ALLOW/WARN/BLOCK + risk_level 0-100 + sub-scores (market_integrity, liquidity, resolution, event_conflict) + risk_flags + ECDSA-signed evidence receipt. Supports Polymarket and Kalshi. Pattern-matches CFTC v. Van Dyke and Kalshi April 2026 disciplinary cases. The pre-trade question: is this market clean enough to touch?