---
title: "Builder's guide · Chappell AI"
description: "Building Your Own Console on GAAPcore: how to give a business its own accounting screens, workflow and controls, with GAAPcore keeping the books correct underneath."
url: https://chappellai.us/guide/
---

Builder's guide

# Building Your Own Console on GAAPcore

How to give your business its own accounting screens, workflow and controls, with GAAPcore keeping the books correct underneath.

**Who it's for:** a business owner who wants their own console, and the developer or coding agent who builds it.

**Written against:** GAAPcore API 0.1.0, database schema v107 (November 2026). The reference console is gaapcore-console, pinned to the same version.

**How to read it:** sections 1–4 are for everyone. Sections 5–8 are the technical setup. Sections 9–13 describe the screens and controls. Sections 14–17 cover the build plan, testing and checklists.

[Start reading](https://chappellai.us/guide/01-who-this-guide-is-for/)   [or download the PDF](https://chappellai.us/guide/gaapcore-builders-guide.pdf)

## Contents

1.  1 [Who this guide is for](https://chappellai.us/guide/01-who-this-guide-is-for/)
2.  2 [What GAAPcore is, and what it is not](https://chappellai.us/guide/02-what-gaapcore-is-and-what-it-is-not/)
3.  3 [How the pieces fit](https://chappellai.us/guide/03-how-the-pieces-fit/)
4.  4 [Decide before you build](https://chappellai.us/guide/04-decide-before-you-build/)
5.  5 [Set up GAAPcore](https://chappellai.us/guide/05-set-up-gaapcore/)
6.  6 [Register your console as a writer](https://chappellai.us/guide/06-register-your-console-as-a-writer/)
7.  7 [The rules every request follows](https://chappellai.us/guide/07-the-rules-every-request-follows/)
8.  8 [Your people: sign-in, roles and the audit trail](https://chappellai.us/guide/08-your-people-sign-in-roles-and-the-audit-trail/)
9.  9 [Screens accountants trust](https://chappellai.us/guide/09-screens-accountants-trust/)
10.  10 [Controls and approvals belong to your console](https://chappellai.us/guide/10-controls-and-approvals-belong-to-your-console/)
11.  11 [Map your business to GAAPcore](https://chappellai.us/guide/11-map-your-business-to-gaapcore/)
12.  12 [Going live](https://chappellai.us/guide/12-going-live/)
13.  13 [Month-end close and statements](https://chappellai.us/guide/13-month-end-close-and-statements/)
14.  14 [A recommended build order](https://chappellai.us/guide/14-a-recommended-build-order/)
15.  15 [Testing and upgrading](https://chappellai.us/guide/15-testing-and-upgrading/)
16.  16 [Security checklist](https://chappellai.us/guide/16-security-checklist/)
17.  17 [Common mistakes](https://chappellai.us/guide/17-common-mistakes/)
18.  A [A complete request, end to end](https://chappellai.us/guide/a-a-complete-request-end-to-end/)
19.  B [Error codes you will meet first](https://chappellai.us/guide/b-error-codes-you-will-meet-first/)
20.  C [Glossary and further reading](https://chappellai.us/guide/c-glossary-and-further-reading/)