LangChain Middleware: The Hooks That Let You Hijack AI Agents Mid-Flight
Agent loops in LangChain just got surgically customizable. Middleware hooks let you inject logic anywhere, turning brittle prototypes into resilient production beasts.
⚡ Key Takeaways
- AgentMiddleware provides six composable hooks to customize LangChain's core agent loop without forking code.
- Prebuilt middleware handles PII redaction, dynamic tool selection, summarization, and retries—essential for production.
- This ports proven web middleware patterns to AI, predicting plugin marketplaces and modular agent ecosystems.
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Originally reported by LangChain Blog
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