Engineering Notes

Practical guides for AI, automation, and product engineering.

Field notes from systems I build: agents, n8n workflows, developer tools, micro-SaaS, and production architecture.

3Published articles

1/1Current page

AllActive track

Learning Tracks

Essays, tutorials, and systems notes.

AI Agents Automation Dev Tools Japanese Learning

Browse Library

Showing 1-3 of 3 articles

All Salesforce AI Agents Python AI Automation Dev Tools Micro SaaS Web Development

Start with the newest deep dive

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

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

LLMs hallucinate. RAG fixes that. This guide walks through building a retrieval pipeline from scratch, covering ingestion, chunking strategies, and how to evaluate your system.

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

Avnish Yadav – February 21, 2026 · 7 MIN READ

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

Stateless LLMs are just goldfish. To build true agents, you need persistence. We break down memory architectures, implementation patterns, and the hidden pitfalls of context poisoning.