[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8},"actionData","errors","root",{"_28":-5,"_38":-5,"_39":40,"_41":42,"_43":44,"_45":46,"_47":48,"_49":50,"_51":52,"_53":54,"_55":56,"_57":58},"routes/_store+/_readers+/email_author.$slug/route",{"_9":10,"_11":-5},"book",{"_12":13,"_14":15,"_16":17,"_18":19,"_20":21,"_22":23},"currentUser","id","Z2lkOi8vbGVhbnB1Yi9TdG9yZTo6Qm9va1Byb2R1Y3QvNzg3MTk","title","Building AI Agents from Scratch with Python","state","published","contactAuthorMethod","email","aboutText","

▎ AI agents are the next frontier of software development. We're no longer talking about chatbots that answer questions — we're talking about autonomous systems that reason, plan, use tools, and execute complex tasks end to end.

▎ Building AI Agents from Scratch with Python is a hands-on guide that takes you from simple LLM calls to production multi-agent systems. Across 15 chapters, you build Aria — an AI agent that starts as a basic loop calling the Anthropic API

and evolves into a complete system with persistent memory, planning, RAG, multi-agent orchestration, security guardrails, and deployment with Docker and FastAPI.

▎ Each chapter adds a real layer to the project: tool calling with a decorator-based registry, short and long-term memory, planning with ReAct and replanning, state machines with checkpoints, Retrieval Augmented Generation with a custom vector

store, testing with LLM-as-Judge, prompt injection defense, and observability with metrics and alerts.

▎ By the end, you extract everything into a reusable SDK and deploy Aria as a REST API with streaming, session management, and monitoring — ready for production.

▎ This is not a theoretical book. Every concept comes with complete, runnable Python code, practical exercises at three difficulty levels, and a common mistakes section that will save you weeks of debugging.

▎ Who this book is for:

▎ - Intermediate Python developers who want to build real AI agents

▎ - Engineers already using LLMs who want to go beyond simple wrappers

▎ - Teams that need to ship agents to production with security and observability

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Kick off your book project, get started with GhostAI, get better at marketing, or spend the day doing all three! Free live workshops on Zoom. Saturday, June 27, 2026.

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