Notes on AI systems, cloud architecture, open source, and software engineering.https://sudheeshshetty.in/en-ushttps://www.freecodecamp.org/news/from-llms-to-langchain-understanding-how-modern-ai-applications-actually-workhttps://www.freecodecamp.org/news/from-llms-to-langchain-understanding-how-modern-ai-applications-actually-workA deep dive into how LLMs integrate with external systems — covering tools, MCP, and LangChain orchestration, with working Node.js examples from basic API calls to multi-step AI workflows.Tue, 23 Jun 2026 00:00:00 GMTTutorialhttps://medium.com/@sudheeshshetty/i-thought-langchain-was-just-another-llm-wrapper-i-was-wrong-221423469eechttps://medium.com/@sudheeshshetty/i-thought-langchain-was-just-another-llm-wrapper-i-was-wrong-221423469eecLangChain is not merely an LLM wrapper — it's an orchestration platform that connects language models with tools, data, and workflows, enabling multi-step applications that go far beyond simple chat.Wed, 10 Jun 2026 00:00:00 GMTAIhttps://medium.com/@sudheeshshetty/how-i-built-an-embeddable-ai-chat-toolkit-and-open-sourced-it-ef4b9f7874fdhttps://medium.com/@sudheeshshetty/how-i-built-an-embeddable-ai-chat-toolkit-and-open-sourced-it-ef4b9f7874fdThe story behind building an open-source AI Chat Toolkit — a Web Components frontend widget paired with a backend server — that lets you add an AI assistant to any web app in minutes.Wed, 03 Jun 2026 00:00:00 GMTOpen Sourcehttps://sudheeshshetty.in/blog/rag-for-software-engineers/https://sudheeshshetty.in/blog/rag-for-software-engineers/Most RAG tutorials stop at chunk-embed-retrieve. Here is what the production gap actually looks like and how to close it.Thu, 01 May 2025 00:00:00 GMTAIRAGArchitectureSearchhttps://sudheeshshetty.in/blog/mcp-vs-tools-vs-langchain/https://sudheeshshetty.in/blog/mcp-vs-tools-vs-langchain/Three approaches to giving LLMs access to external capabilities. Here is when to use each one and why the choice matters more than most people think.Sat, 15 Mar 2025 00:00:00 GMTAIArchitectureMCPLangChainhttps://sudheeshshetty.in/blog/building-ai-chat-toolkit/https://sudheeshshetty.in/blog/building-ai-chat-toolkit/After integrating three different LLM providers across two products, I got tired of rewriting the same patterns. Here is what I built and what the experience taught me about production AI systems.Fri, 10 Jan 2025 00:00:00 GMTOpen SourceAITypeScriptArchitecturehttps://medium.com/@sudheeshshetty/how-to-make-authentication-easier-with-json-web-token-cc15df3f2228https://medium.com/@sudheeshshetty/how-to-make-authentication-easier-with-json-web-token-cc15df3f2228A step-by-step guide to implementing token-based authentication in Node.js using JWTs — covering structure, advantages, and working code examples for a secure auth system.Wed, 07 Jun 2017 00:00:00 GMTTutorialhttps://medium.com/@sudheeshshetty/building-a-chat-application-with-mean-stack-637254d1136dhttps://medium.com/@sudheeshshetty/building-a-chat-application-with-mean-stack-637254d1136dBuild a real-time chat application from scratch using the MEAN stack and Socket.io — complete server and client setup with working code for bi-directional communication.Wed, 16 Nov 2016 00:00:00 GMTTutorialhttps://medium.com/@sudheeshshetty/days-at-fsmk-summer-camp-2016-dab3822ec3c4https://medium.com/@sudheeshshetty/days-at-fsmk-summer-camp-2016-dab3822ec3c4A personal recount of volunteering at FSMK's 5th summer camp, teaching web backend development with Python, Flask, and MongoDB over seven days.Mon, 15 Aug 2016 00:00:00 GMTCommunity