LangChain for Absolute Beginners - Part 2: Prompts, Models & LCEL Chains
Article summary
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In Part 1 , we installed LangChain and sent our first message to a chat model. That's fine for a one-off question, but real applications need repeatable, reusable prompts - and the ability to connect several steps into a pipeline. That's what we're covering today: prompt templates and LCEL (LangChain Expression Language) . Recap: The Series So Far Part 1 - What LangChain is & your first script Part 2 (this article) - Prompts, models, and LCEL chains Part 3 - Tools and building your first…
1Key Takeaways
- In Part 1 , we installed LangChain and sent our first message to a chat model.
- That's fine for a one-off question, but real applications need repeatable, reusable prompts - and the ability to connect several steps into a pipeline.
- That's what we're covering today: prompt templates and LCEL (LangChain Expression Language) .
- Recap: The Series So Far Part 1 - What LangChain is & your first script Part 2 (this article) - Prompts, models, and LCEL chains Part 3 - Tools and building your first….
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 in Part 1 , we installed LangChain and sent our first message to a chat model.
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