Blog | Avnish Yadav

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Technical TutorialsBeyond Built-ins: Architecting Custom Tools in LangChain

Avnish Yadav – February 22, 2026 · 7 MIN READ

Beyond Built-ins: Architecting Custom Tools in LangChain

Standard LangChain tools handle the basics, but production agents need to touch internal APIs and proprietary logic. Here is a deep dive into building robust, Pydantic-validated custom tools.

BuildBuilding Your First RAG Pipeline: A Developer’s Guide to Context-Aware AI

Avnish Yadav – February 21, 2026 · 8 MIN READ

Practical guides for AI, automation, and product engineering.

Essays, tutorials, and systems notes.

Start with the newest deep dive

Beyond Built-ins: Architecting Custom Tools in LangChain

Building Your First RAG Pipeline: A Developer’s Guide to Context-Aware AI

From Chatbot to Agent: The Engineer's Guide to LLM Memory Systems