14 min · +250 XP
Build It Live
You and Claude, making your tool exist right now.
By the end of this lesson
You'll have a working version of YOUR tool running on your computer.
Time to build your pick. The no-stress way: open the terminal, start Claude, and just say — 'make a new folder called budget on my Desktop and do all your work inside it.' Then describe your tool with the five ingredients from Module 5. Speak it or type it. (Prefer doing the folder yourself? Mac: right-click the folder → New Terminal at Folder; Windows: Shift+right-click → Open in Terminal.)
claude --dangerously-skip-permissions
Run this at the terminal prompt, then let Claude make the folder and build freely without pausing to ask.
you ▸ Build me a budget tool. I'll add expenses with a name and amount,
it shows a running total and a simple monthly chart, and it saves
everything on my device. Dark theme. Build the whole thing and tell
me how to open it. Don't stop to ask questions.
claude ▸ building… ✓ Open the link it printed to see your tool.Build your pick
0/6If Claude gave you a file like index.html, double-click it any day — it always works. If it gave you a localhost address, that page runs only while it's started: close the terminal and the address stops answering. NOTHING is lost — your files and data are in the folder. To restart: open the folder, run claude --continue, say 'start my tool'. Want zero ceremony? Tell Claude: 'make it a single file I can double-click' — the beginner-friendly default.
You just directed an AI to build a thing you needed — and it exists. And it's YOURS: it keeps working with Claude closed, offline, even if you cancel the subscription — Claude built it, but it doesn't power it. Notice you didn't write the code. Your job was taste and judgment. That's the builder's actual job from here on.

Author
Evgeny Arsentyev
PhD · Chief Product Officer at a healthtech company