Guides

Practical, interactive software engineering guides. Learn by reading short explanations, trying examples, and playing with small focused sandboxes.

New guides will be added only when they are useful and complete.

AI Engineering Guides

Hands-on developer guides with interactive sandboxes. No account or paid API required.

Understanding Vector Similarity — Learn cosine similarity, dot product, and Euclidean distance as used in RAG and semantic search. Includes an interactive demo.
Understanding RAG (Retrieval-Augmented Generation) — Learn how RAG retrieves relevant chunks, builds prompt context, and helps an AI answer using external knowledge.
Understanding MCP: Model Context Protocol — Learn how MCP connects AI apps to tools and external systems with a deterministic flow simulator.
Understanding AI Agents — Learn how AI agents plan tasks, use tools, keep context, and decide the next action. Includes interactive simulations.
LLM Guardrails & Prompt Injection — Learn how prompt injection works and how layered guardrails keep tool-connected AI systems safe.