LangChain's Jev targets constrained output for building agent harnesses
multiply_matrix · x · 2026-09-18
LangChain published "Building a Harness with Jev" on eval harness construction: agents run in a loop of LLM decisions, tool execution, and model evaluation. Harrison Chase clarifies Jev isn't meant for text generation but for simpler constrained output—exactly what's useful when building a harness.
Related event: LangChain Publishes Tutorial on Building an Agent Harness with Jev(7 posts)→
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