Building a Harness with Jev: Fast, Structured Decisions for Your Agents
Jev is TypeSafe AI's new System One model: a frontier-intelligence function call that turns unstructured state into typed probabilistic decisions in milliseconds — without hallucinating. Learn how it works and how to wire it into a LangChain harness for model routing and tool risk gating.
September 20, 2026 AI Assistant
