Day 0

Prepare your account and project environment

Do not write code today. Confirm the entry point, project folder, and safety boundary so every later step happens somewhere you can inspect.

Suggested time
30-45 minutes
Completion evidence
Environment and project folder screenshots

What you should have by the end

You can open a working Codex client, select a dedicated project folder, ask Codex to describe the directory accurately, and identify information that must stay outside the project.

Choose a Codex entry point

Sign in with your ChatGPT account. The exact product name may change. For this course, the important requirement is that Codex can open or connect to one clearly bounded project folder.

Create a dedicated project folder

Do not give Codex your entire desktop, downloads directory, or a folder full of private files.

my-16th-case/├─ 00-course-materials/├─ 01-first-web-page/├─ 02-screenshots-and-tests/└─ 99-version-backups/

Today, Codex only needs access to 01-first-web-page. It may be empty.

Ask Codex to read before it changes

The first message confirms the boundary. It does not ask for a website yet.

First conversation
Do not modify any files yet.

Please tell me:
1. The name of the project folder you can currently see.
2. The files and subfolders that actually exist inside it.
3. If the folder is empty, say clearly that it is empty.
4. I will build a simple personal maker page next. What information should I prepare first?
Pass criteria
  • The folder name matches your selection.
  • Codex does not invent files in an empty folder.
  • No file is created or changed before approval.

Set the safety boundary

Keep passwords, API keys, tokens, identity documents, unapproved client data, and private contacts out of the project. Payment, sending, deletion, and external submission must remain human-confirmed actions.

Complete the environment check

Deliverable

Environment and project folder screenshots

Move to Day 1 only after both screenshots are ready. Having no web page today is completely normal.

Go to Day 1