Step-by-Step Tutorial: Build and Deploy a Real AI App Using Claude Code

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A hands-on tutorial published on DEV Community walks developers through using Anthropic's Claude Code to build a document Q&A API from scratch and deploy it to production. Unlike basic installation guides, this tutorial covers the full development lifecycle, including endpoint creation, local testing, error handling, and iterative refinement. Claude Code is a terminal-based AI coding agent that works at the project level, reading entire codebases and making multi-file changes rather than offering line-by-line suggestions. The tutorial demonstrates how Claude Code automatically runs code, reads error output, and self-corrects, reducing the need for developers to switch between tools. The project follows a retrieval-augmented generation (RAG) pattern and is designed to be completable in roughly one afternoon.

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