DutyShield

DutyShield is an AI compliance agent for international trade. Tariff classification is famously labor-intensive — a single product can fit into multiple Harmonized System (HS) codes with materially different duty rates. DutyShield ingests a product description, finds candidate HS codes, scores them against active Free Trade Agreement rules, and produces a defensible classification rationale that survives customs audits.

The agent loop is the interesting piece. It calls into the WCO Harmonized System database, cross-references the importing country's tariff schedule, applies the relevant FTA rules-of-origin tests, and emits a structured output with audit trail. Every classification has a confidence score and a cited authority.

Engineering trade-offs: hallucination tolerance is zero — a wrong classification can cost a six-figure penalty per shipment. We hard-constrain the agent to outputs that exactly match a row in the tariff schedule, with structured citations. The model never invents HS codes; it can only rank existing ones.