LangChain says context engineering is the biggest challenge for agent harnesses

LangChain · x · 2026-09-16

LangChain argues the biggest challenge for an agent harness is context engineering — what information an agent gets, and when. The longer the task, the harder it is to keep the context window from overloading.

Deep Agents ships with context management built in: filesystems, subagents, and skills, already wired up. Details are covered in the LangChain Academy course.

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