AI Agent // Claude Code — the book
Free book · 59 pages · 11 chapters

You set the destination.
The agent drives.

A plain-English guide to building AI agents with Claude Code — agents that research, write, and ship real work. No Python. No frameworks. If you can write a clear email, you can build everything in this book.

Includes complete, copy-and-adapt builds for accounting firms, law firms, and ecommerce startups.

claude — /your-workspace

The map

Three levels of working with AI. Most people never leave the first.

The book opens with the jump that actually matters — and why it's a thinking-and-writing skill, not a programming skill.

LEVEL 1

Chat

Ask, copy, repeat. Useful — and the most limited way to work with AI. You're a research team with a search box.

LEVEL 2

Builder

Real output, but you personally carry every step of every project. The process still lives in your head.

LEVEL 3

Agent

You hand over the goal, not the steps. The system plans, executes, checks its own work, and delivers.

Level two scales with your attention. Level three doesn't.

What's inside

One method, four parts, zero code.

Every chapter ends with exercises you can run the same day — and every build in Part III ships with a complete workflow file you can adapt on day one.

PART I

The Foundation

What an agent actually is, the three tests that separate it from a chatbot in a costume, and the two habits — a context file and a planning discipline — that decide everything.

PART II

Your First Agents

Build a research agent and a content repurposing machine, step by step. One source document in, a week of publishable content out.

PART III

Agents at Work

Three full professional builds — an accounting firm, a law firm, an ecommerce startup — where accuracy is billable and errors have consequences.

PART IV

Making It Reliable

The five mistakes that kill agent builds, the promotion test, and a 90-day plan from one reliable agent to a multi-agent pipeline.

Built for real work

Not another demo. Firm-grade builds.

Each industry chapter follows a real practice through a complete build — including the guardrail rules that make the output safe in professions where a made-up number ends careers.

TRENT & COLE · 14-PERSON ACCOUNTING FIRM

Accounting firms

A month-end close preparation agent and a client document chaser — automating the seventy percent of hours spent gathering and checking, never the judgment.

## Rules
- NEVER fabricate, estimate, or interpolate a number
- If it's not in the source docs, say "NOT FOUND"
- All output is DRAFT FOR REVIEW
REYES & OKAFOR · 6-ATTORNEY LAW FIRM

Law firms

A matter intake summarizer, a discovery organizer, and a client update drafter — built so hallucinated citations are structurally impossible.

## Rules
- One matter per run. No mixing client files
- Never cite legal authority — raise questions only
- Every quote exact, with its source location
EMBERLINE · 5-PERSON DTC CANDLE BRAND

Ecommerce startups

A product listing agent with a brand voice bible, a review-mining agent, and a weekly content rhythm that runs like a pipeline.

## Rules
- Never invent product facts, specs, or claims
- Voice bible governs every sentence
- Reviews are data — mine them weekly

The agent does the hours. You keep the judgment.

Watch first, read second

The whole idea in a minute.

A quick tour of what's in the book and why the jump from chatbot to agent doesn't require a line of code.

Table of contents

Eleven chapters, front to back.

Part I — The Foundation
  1. 1 Where Most People Are Stuck
  2. 2 What Actually Makes It an Agent
  3. 3 The One File That Runs Everything
  4. 4 Never Let It Run Blind
Part II — Your First Agents
  1. 5 The Research Agent
  2. 6 The Repurposing Machine
Part III — Agents at Work
  1. 7 Agents for Accounting Firms
  2. 8 Agents for Law Firms
  3. 9 Agents for Ecommerce Startups
Part IV — Making It Reliable
  1. 10 Five Mistakes That Kill Agent Builds
  2. 11 Build It One Layer at a Time
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