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Tejas P Mehta

Practical AI for Developers, PMs & Founders

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A chatbot that only talks becoming an agent that takes action
Posted inAI & LLMs AI Agents in PHP Series MySQL & Databases PHP Tutorials

From Answering to Acting: What Makes an AI Agent

Posted by By Tejas P Mehta October 21, 2026
A customer opens the Nimbus chat window and types: "Hi, I bought the Pro annual…
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An AI answer with numbered citations linked to source documents
Posted inAI & LLMs PHP Tutorials RAG Tutorial Series

Episode 6 — Generation: Grounded Answers with Citations

Posted by By Tejas P Mehta July 23, 2026
The last mile Five episodes of groundwork come together here. We can load documents, chunk…
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Infographic comparing an LLM answering from memory versus an LLM using RAG to read from a knowledge base
Posted inAI & LLMs PHP Tutorials RAG Tutorial Series

Episode 1 — What Is RAG, and Why Should You Care?

Posted by By Tejas P Mehta July 23, 2026
The problem, in one support ticket Imagine a customer opens a chat on Nimbus's website…
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