LangChain for Absolute Beginners - Part 5: Memory & Middleware
Article summary
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Every agent we've built so far forgets everything the moment invoke() returns. Ask it a follow-up question and it has no idea what you were just talking about. In this article we fix that with memory , and then add middleware - LangChain's mechanism for enforcing rules around what an agent is allowed to do. Recap: The Series So Far Part 1 - What LangChain is & your first script Part 2 - Prompts, models, and LCEL chains Part 3 - Tools and your first agent Part 4 - RAG: reading your own…
1Key Takeaways
- Every agent we've built so far forgets everything the moment invoke() returns.
- Ask it a follow-up question and it has no idea what you were just talking about.
- In this article we fix that with memory , and then add middleware - LangChain's mechanism for enforcing rules around what an agent is allowed to do.
- Recap: The Series So Far Part 1 - What LangChain is & your first script Part 2 - Prompts, models, and LCEL chains Part 3 - Tools and your first agent Part 4 - RAG: reading your own….
2AIWedia Score
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3Why it matters
Prompt and agent patterns spread fast; staying current saves time and token cost. DEV — Prompt Engineering reports that every agent we've built so far forgets everything the moment invoke() returns.
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