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AI Engineering

Hands-on AI development — building AI agents, LLM tools, MCP servers, agentic apps, and deployment, plus the latest in artificial intelligence and machine learning.

74 guides~1.1 hrs totalupdated Jun 30, 2026

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12 on this page
IntermediateRAG Chunking & Retrieval Quality: Fix Bad Answers (Part 2)Fix RAG chunking to stop wrong answers — use fixed-size windows, overlap, and a 10-line retrieval eval. The model was never the problem; the chunks were.6 minIntermediateHow to Evaluate an AI Agent: Metrics & Frameworks (2026)An AI agent evaluation guide for 2026: the metrics that actually matter, how to score them, and the frameworks — LangSmith, DeepEval, Ragas — to run them.9 minIntermediateWhy Your LangGraph Agent Keeps Looping (and How to Fix It)Your LangGraph agent looping until GraphRecursionError? Here's how to diagnose the four causes and fix the stop condition — not just raise the limit.9 minBeginnerPydantic BaseModel: A Primer for AI Agent Developers (2026)A Pydantic BaseModel primer for AI agent developers: define a model, validate data, and turn messy LLM output into a clean, typed Python object.4 minBeginnerWhat Is RAG in AI? A Practical Developer's Guide (2026)What is RAG? A developer's guide to retrieval-augmented generation: why LLMs need it, the retrieve-augment-generate loop, and a runnable RAG in 25 lines.6 minBeginnerPython Decorators: A Primer for Reading AI Agent Code (2026)A Python decorators primer for reading AI agent code: what the @ symbol does, how @tool and @app.get work, and why frameworks hand you decorators to apply.4 minBeginnerAI Agent vs Workflow: What's the Actual Difference? (2026)AI agent vs workflow, settled: one question tells you which you actually have. The difference is who decides the next step — your code, or the model — with code examples.5 minBeginnerAsync and Await in Python: A Primer for AI Agent Code (2026)An async and await in Python primer for reading AI agent code: what async def, await, and asyncio.run mean, and the two mistakes beginners always hit.5 minBeginnerDocker for Python: A Primer for Shipping AI Agents (2026)A Docker for Python primer: what images and containers are, how to write a Dockerfile for an app, and why agents ship in containers — explained simply.4 minBeginnerEmbeddings and Vector Search: A Primer for AI Agents (2026)An embeddings and vector search primer: how text becomes vectors, how similarity search finds meaning not keywords, and why agent memory and RAG rely on it.4 minBeginnerHTTP and Bearer Tokens: A Primer for Python Devs (2026)An HTTP and bearer token primer for Python devs: methods, status codes, JSON bodies, and how an Authorization Bearer header authenticates an API call.5 minBeginnerLLM API Keys: Set Up OpenAI, Anthropic & Gemini (2026)An LLM API key primer: where to get OpenAI, Anthropic, and Gemini keys, how to load one safely with python-dotenv, and how to avoid a leaked-key bill.4 min
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