Source record

Published by LangChain Blog (T1.5 source). The original is at https://www.langchain.com/blog/what-is-an-agent.

Pipeline notes

The summary and note below are generated by the signal pipeline — they are Beyond Desk’s reading, not quotations from the source.

LangChain defines an AI agent by how much control flow the model owns, ranging from a simple LLM router to a system that picks its own tools over long horizons. The post contrasts agents with workflows and argues observability, evals, memory, and permissions become critical as autonomy increases.

A vendor definition distilled from four years of production agent shipping, useful for teams locating their system on the autonomy spectrum and judging what infrastructure it actually needs.

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