LangChain Team Publishes Guide to Building Agent Harnesses with Jev
hwchase17 · x · 2026-09-19
Sydney Runkle, DevRel lead at LangChain, published "Building a Harness with Jev", explaining that agents run in a loop — an LLM decides what to do, a tool executes, a model evaluates results, and the loop continues until completion. The article covers why agents and LLMs were initially hard to wrangle and how a harness constrains and stabilizes that loop. Harrison Chase and other LangChain members boosted the piece.
Related event: LangChain Publishes Tutorial on Building an Agent Harness with Jev(7 posts)→
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