# Agents From Scratch

A hands-on guide, in four notebook sections, to building an AI agent from first principles up to an 'ambient' email assistant connected to the Gmail API, covering agent basics, evaluation, human-in-the-loop review and memory.

Agents From Scratch is a guide to building agents from first principles, built up in four sections, each with a notebook and accompanying code, progressing from the basics of an agent through agent evaluation, human-in-the-loop review, and memory. The sections converge on a deployable "ambient" email assistant connected to the Gmail API, and the same underlying principles are meant to carry over to agents for other tasks.

It requires Python 3.11 or later for compatibility with LangGraph, an OpenAI API key, and a LangSmith account and API key for tracing, configured through a local environment file, with dependencies installed through uv or pip in editable mode.

Website: https://academy.langchain.com/courses/ambient-agents