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Posted inAI & LLMs AI Agents in PHP Series AI Safety & Guardrails Chatbots & Support Bots MySQL & Databases PHP Tutorials Prompt Engineering

Guardrails and Human Approval

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By Tejas P Mehta October 21, 2026

Nimbus can now read orders, check policies, search documents, open tickets and remember conversations. It's…

Posted inAgent Memory AI & LLMs AI Agents in PHP Series Chatbots & Support Bots MySQL & Databases PHP Tutorials

Memory: Conversations That Remember

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By Tejas P Mehta October 21, 2026

Here's a perfectly normal support conversation: Customer: Can I get a refund for order #1043?…

Posted inAI & LLMs AI Agents in PHP Series Chatbots & Support Bots MySQL & Databases PHP Tutorials Prompt Engineering Tool Design

Giving Nimbus Its First Real Tools

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By Tejas P Mehta October 21, 2026

After Part 2, Nimbus can look up an order through real tool calling. That's useful,…

Posted inAI & LLMs AI Agents in PHP Series Chatbots & Support Bots MySQL & Databases PHP Tutorials What Is an AI Agent

From Answering to Acting: What Makes an AI Agent

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By Tejas P Mehta October 21, 2026

A customer opens the Nimbus chat window and types: "Hi, I bought the Pro annual…

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…

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