Capstone: Your Advanced AI Project

This is it — your capstone. Everything from the lab comes together here: prompting (Ch. 1–4), training a model (Ch. 5), code (Ch. 6–7), agents (Ch. 8), and interfaces (Ch. 9). You're going to plan, build, ship, and demo a real AI project that's entirely yours.

Real engineers don't just code — they follow a process. So will you: Plan → Build → Test → Ship → Demo → Reflect.

Step 1 — Plan (don't skip this!)

Great projects start on paper, not in code. Write a one-page plan answering:

What does it do? One sentence. ("A kind study coach that quizzes me on any topic.")
Who is it for? ("Kids my age who hate boring revision.")
What will it use? A persona + system prompt? Memory? A tool? A Gradio interface? (Most capstones use a system prompt + Gradio. Add memory or a tool if your idea needs them.)
How will I know it works? Write 3 things it must do well.

Tip

Pick something you actually want to exist. You'll build a much better project if you care about it. Stuck? See the idea list at the bottom.

Step 2 — Build

Start from this complete, working template and make it yours. It combines a persona (Chapter 3), the API (Chapter 7), and an interface (Chapter 9):

import gradio as gr

SYSTEM = """You are StudyQuest, a friendly, encouraging study coach for kids.
Rules:
- Keep answers short, clear, and positive. Never be mean.
- If asked for a homework answer, give a helpful HINT first, not the full answer.
- End each reply with a tiny encouragement."""

def coach(question):
    message = client.messages.create(
        model="claude-haiku-4-5",
        max_tokens=350,
        system=SYSTEM,
        messages=[{"role": "user", "content": question}],
    )
    return message.content[0].text

gr.Interface(
    fn=coach,
    inputs=gr.Textbox(label="Ask StudyQuest"),
    outputs=gr.Textbox(label="Coach says"),
    title="StudyQuest 🎯",
    description="Your friendly AI study coach.",
).launch(share=True)

Make it yours: rewrite SYSTEM to create your assistant — its job, personality, and rules. Change the title and description. If your plan needs memory or a tool, bring in the code from Chapter 8.

Step 3 — Test (try to break it!)

Engineers test on purpose. Be your project's toughest user:

Ask it the things it should be great at. Does it follow all your rules?
Try to break it: ask something silly, rude, or off-topic. Does it stay kind and in-character?
Check your Chapter 4 habits: does it ever make things up? Add a rule to your system prompt to handle it.

Every time you find a problem, fix a rule and re-test. This loop is the real work of building AI.

Step 4 — Ship

Run it with launch(share=True) and get your public link. Your project is now a real, usable app. 🎉

Stay safe

Apply everything from your AI Charter (Chapter 4) to your finished project:

Only share your link with people you trust — it uses your account's credit.
Make sure your assistant is kind, safe, and honest for whoever uses it — you're responsible for what you ship.
Never collect or ask for users' private information.

Step 5 — Demo

Show your project off! Pick one:

Record a 60-second video: introduce it, show it working, share one cool moment.
Demo it live to family or friends.
Write a short "project card": what it does, what you built it from, and one thing you're proud of.

Step 6 — Reflect

In your "My AI Helpers" doc, answer:

What was the hardest part, and how did you solve it?
Which chapter's skill did you lean on most?
What would you add in version 2?

Check yourself

Why do engineers plan before they build?
What does it mean to test by trying to break your project?
Name two things from your AI Charter that apply to anything you ship.

Capstone project ideas 🛠️

Pick one, or invent your own:

Study Coach — quizzes you, gives hints not answers (the template above).
Story Forge — co-writes adventures where you choose what happens next.
Kindness Bot — turns a grumpy message into a kind one.
Trivia Agent — uses a roll_dice or scoring tool to run a quiz game.
Language Buddy — chats with you in simple Spanish/French and helps you learn.
Idea Machine — brainstorms project or invention ideas from three words.

Make it simpler · ages 9–11

With a grown-up, build the Story Forge from the template — just change the SYSTEM prompt to "You are a story narrator. Continue our adventure based on what I choose, and always end by asking what I do next." Then play your story and share the link. You planned, built, and shipped an AI app! 🌟

Level up · ages 13–16

Level up your capstone: combine memory + a tool + a persona into a true agent with an interface, and host it permanently on Hugging Face Spaces so your link never expires. Then write a proper README: what problem it solves, how it works, and what you'd improve. That's a portfolio piece you can show off for years.

You did it. 🎓

You started by sending your first prompt. Now you can plan, build, and ship real AI projects — with code, agents, interfaces, and a strong sense of how to use AI responsibly. That is genuinely what a young AI engineer does.

You've earned the AI Engineer badge — the final one. 🏅

This is the end of the lab, but the start of everything you'll build next. Pick a bigger idea. Keep shipping. The future is yours to make. 🚀

In this chapter you'll