@imkarthik03

Nagappan S

@imkarthik03Chennai, IndiaJoined September 2026

Building scalable products at the intersection of Full Stack Engineering & AI

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I build scalable web apps, experiment with AI, and turn complex engineering problems into working products.

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Nagappan S's blogs

Nags Dev Communitynagspidey.hashnode.dev13 posts

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NSNagappan Snagspidey.hashnode.dev2d ago · 9 min read

Evals: How Do You Actually Know Your AI Feature Works?

You ship a new AI feature. It works great in your testing — you type in a few prompts, the answers look right, you demo it to your team, everyone nods. Three weeks later, a user reports that the assis

NSNagappan Snagspidey.hashnode.dev2d ago · 8 min read

Why AI replies stream word-by-word

You've typed a prompt into ChatGPT or Claude a thousand times. The response doesn't just appear — it types itself out, word by word, sometimes fast enough to blur, sometimes with an odd little pause m

NSNagappan Snagspidey.hashnode.devSep 29 · 7 min read

What Is MCP (Model Context Protocol) and Why It Matters for Agents

You've probably built at least one integration where your AI app needed to talk to Slack, then Google Drive, then your internal database, then GitHub — and each one meant writing a different client, h

NSNagappan Snagspidey.hashnode.devSep 28 · 8 min read

Temperature & Sampling: What Actually Controls How "Creative" an AI Response Is

You ask the same model the same question twice and get two different answers. Not a rewording — sometimes a completely different structure, a different example, even a different conclusion. If you've

NSNagappan Snagspidey.hashnode.devSep 25 · 8 min read

Why AI Models Hallucinate, Really

You ask an AI coding assistant which version of a library added a specific function. It answers instantly, with total confidence, citing a changelog entry — chapter and verse. You go check. The functi