RAG Retrieval-Augmented Generation: turning AI from closed-book to open-book

RAG in Practice: Stop Making Your LLM Take Closed-Book Exams

A practical RAG tutorial: build an enterprise knowledge base Q&A system in 4 steps using embedding vector search and Claude. Contextual Retrieval cuts retrieval failure from 5.7% to 1.9%, with full Python code and Voyage AI model comparison.

February 10, 2026 · 10 min · 2050 words · Dream Beast Programming
Tool Use Cover - Teaching AI to Call External Tools

Tool Use: Teach AI to Make Phone Calls and Get Help When It's Stuck

Claude can’t do math or query databases on its own. But you can teach it to ‘make phone calls’ — give it the numbers for calculators, databases, and other tools, and let it dial when needed.

February 8, 2026 · 11 min · 2142 words · Dream Beast Programming
Prompt Chaining Cover - AI Self-Review Process

Prompt Chaining: Make AI Check Its Own Work and Double Accuracy

Writing requires revision, and so do AI responses. Learn how to use prompt chaining to make Claude self-review and improve, dramatically boosting response accuracy. Like having AI write a draft, check it, polish it, and hand you a perfect final answer.

February 4, 2026 · 6 min · 1256 words · Dream Beast Programming
Clear vs vague prompt comparison

Prompt Engineering Lesson 2: Clear and Direct is King

Anthropic’s official tutorial chapter 2: Why does Claude keep missing the point? Because your prompts aren’t clear enough. Learn this one trick to make AI understand you precisely.

January 12, 2026 · 7 min · 1307 words · Rexai Programming
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