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LangChain publishes a Jev harness guide and names three shipped community projects
Sydney Runkle and Hunter Lovell's September 17 post walks through wiring Jev into a LangChain harness and points at three things people already built with it: Kyle Jeong at Browserbase powering browser-use agents for fractions of a cent, Jarrod Watts's live trading agent, and Ryan Vogel's email triage at scale. The framing throughout is that code owns control flow and the model only answers narrow typed questions. The post repeats TypeSafe's 200x-faster, 400x-cheaper classification claim without independent measurement, which is the gap a builder should close themselves.
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