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Large Language ModelsLangChain BlogPublished: Mar 27, 2026, 01:00 JST1 min read

LangChain's Agent Middleware enables developers to build custom agent harnesses tailored to specific application needs

LangChain's Agent Middleware enables developers to build custom agent harnesses tailored to specific application needs

3 Key Points

  1. Agent harnesses serve as the critical connection between LLMs and their operational environments, enabling agents to take actions

  2. Agent Middleware allows developers to customize and extend agent harnesses beyond default configurations

  3. Application-specific agent harnesses can be built by leveraging middleware to adapt agents to unique use cases and requirements

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