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Tejas P Mehta

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Build a RAG

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Claude Workflow
Build a RAG

Posted inAI & LLMs Local News RAG - Prompts PHP Tutorials Prompt Engineering RAG Tutorial Series Retrieval-Augmented Generation

Bonus 2 — Local News RAG: Recency-Aware Answers & Multi-Source Citations

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By Tejas P Mehta July 25, 2026

The last piece Bonus 1 left us able to fetch, dedup, and retrieve today's news.…

Posted inChatbots & Support Bots Local News RAG - Build MySQL & Databases PHP Tutorials RAG Tutorial Series Retrieval-Augmented Generation

Bonus 1 — Local News RAG: Pointing the Pattern at Live Data

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By Tejas P Mehta July 25, 2026

Same skeleton, live target You just built a support bot over static documents. This bonus…

Posted inAI & LLMs Evaluation & Deployment PHP Tutorials RAG Tutorial Series Retrieval-Augmented Generation

Episode 8 — Evaluating & Shipping

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By Tejas P Mehta July 23, 2026

From "seems good" to "measurably good" to "live" For two episodes I've been repeating the…

Posted inEmbeddings & Vector Search Hybrid Search & Guardrails PHP Tutorials Prompt Engineering RAG Tutorial Series Retrieval-Augmented Generation

Episode 7 — Improving Quality: Hybrid Search, Reranking & Guardrails

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By Tejas P Mehta July 23, 2026

"Works on my questions" isn't "works" Episode 6 gave us a real, grounded, cited bot.…

Posted inAI & LLMs Grounded Generation PHP Tutorials Prompt Engineering RAG Tutorial Series Retrieval-Augmented Generation

Episode 6 — Generation: Grounded Answers with Citations

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By Tejas P Mehta July 23, 2026

The last mile Five episodes of groundwork come together here. We can load documents, chunk…

Posted inAI & LLMs PHP Tutorials RAG Tutorial Series Retrieval Tuning Retrieval-Augmented Generation

Episode 5 — Retrieval: Top-K, Thresholds & Filtering

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By Tejas P Mehta July 23, 2026

Our search is fast, but it isn't smart After Episode 4, MySQL ranks our chunks…

Posted inEmbeddings & Vector Search MySQL & Databases PHP Tutorials RAG Tutorial Series Retrieval-Augmented Generation Vector Search in MySQL

Episode 4 — Scaling the Vector Search in MySQL

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By Tejas P Mehta July 23, 2026

The problem hiding in our search Episode 3 ended on a high: ask "how do…

Posted inEmbeddings Embeddings & Vector Search MySQL & Databases PHP Tutorials RAG Tutorial Series Retrieval-Augmented Generation

Episode 3 — Embeddings & Your First Similarity Search

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By Tejas P Mehta July 23, 2026

The gap we have to close At the end of Episode 2 we had chunks.json:…

Posted inAI & LLMs Document Chunking PHP Tutorials RAG Tutorial Series Retrieval-Augmented Generation

Episode 2 — Preparing the Knowledge Base: Loading & Chunking Your Docs

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By Tejas P Mehta July 23, 2026

Where we left off In Episode 1 we cheated. We pasted Nimbus's refund policy into…

Infographic comparing an LLM answering from memory versus an LLM using RAG to read from a knowledge base

Posted inAI & LLMs PHP Tutorials RAG Fundamentals RAG Tutorial Series Retrieval-Augmented Generation

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

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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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