Active time: Approximately 20–30 minutes. The agent may take additional time to create the first version.

Today’s outcome: Create a working Task Prioritizer and open it in your browser.

Quick links: LinkedIn lessons · WhatsApp group · The Builder Course website . Setup . Day 1

Using Claude Code?

This lesson uses Codex. If you already use Claude Code, run claude instead of codex.

Replace AGENTS.md with CLAUDE.md everywhere it appears, including inside copied prompts. The remaining steps are the same. The supported setup and demonstrations use Codex.

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Yesterday, you learned where your project lives and how your coding agent sees it.

Today, you will ask the agent to create the first working version of your app.

You do not need to understand every line of code yet. Your job today is to give a bounded instruction, check the agent’s plan and test the result.

Why this matters

An AI chat gives you an answer. A coding agent can work directly with the files in your project folder.

That makes the instruction and your review of its work very important.

Today you will practise three habits:

• set clear boundaries before the agent begins;
• read its plan before approving changes; and
• test the result yourself. </aside>

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Today’s Lesson Video

https://supercut.ai/share/thebuildercourse/P50xUgYy2F1tU0ctv7K5vy

Before you begin

Open the same project folder you used on Day 1 in VS Code.

In the Explorer on the left, confirm that you can see:

• AGENTS.md if you are using Codex; or
• CLAUDE.md if you are using Claude Code.

Then open VS Code’s terminal:

1. Select Terminal in the top menu.
2. Select New Terminal.
3. Confirm that the final part of the terminal path is the name of your challenge folder.

If the wrong folder is open, return to Day 1 before continuing.