Claude Opus 4 Built This App — No Seriously.

See the full prompt, explore the source code, and try Claude yourself.

(sponsored)

🧠 What You’re Seeing

In this YouTube tutorial, I asked Claude Opus 4 (Anthropic’s most advanced AI model) to build a real-world full-stack app — Project Pulse — from scratch.

I didn’t give it a vague prompt. I framed a real problem the way you would to a developer: a working project tracker with roles, deadlines, real DB, and clean code.

Claude planned the structure, explained its reasoning, and generated production-grade code.

This wasn’t boilerplate — this was senior-level architecture and thinking.

⚙️ Features Claude Delivered

• ✅ Full-stack app with Next.js 14, Tailwind CSS, and PostgreSQL
• ✅ Role-based views (Admin, Department, Project User)
• ✅ Deadline detection + alert banners
• ✅ Real-time notifications from logic
• ✅ Analytics dashboard with performance and delivery stats
• ✅ Clean modal for “Create New Project” flow
• ✅ Extension workflow with admin approval
• ✅ Mobile responsiveness + theme toggle (Dark Mode)
• ✅ CSV export for reports or Excel
• ✅ Persistent database with full CRUD via Prisma

🧠 Why I Chose Claude Opus 4

There are a lot of LLMs out there. But for this tutorial, I didn’t want a quick code snippet — I wanted architecture, reasoning, and production-level thinking.

Claude Opus 4 stood out for three reasons:

1. Extended Thinking

Claude doesn’t just answer — it thinks step-by-step, explains trade-offs, and reflects like a real senior developer.

2. Structured Output

From file architecture to component breakdowns, it generates clean, modular code that actually works, not just Hello World templates.

3. Context Retention

Throughout the full prompt session, Claude remembered roles, logic, even naming conventions — without drifting.

That’s why I picked Claude Opus 4 for this build. I didn’t want magic. I wanted reliability.

🧾 The Prompt I Gave Claude

You are a world-class AI developer. I need your help building a full-stack, mobile-friendly Project Tracker app using Next.js (latest version with App Router), React.js, Tailwind CSS, and PostgreSQL.

GOAL:

I want to showcase this app in a YouTube video where Claude Opus 4 builds an actual working tool. The target audience is small organizations who currently manage projects in Excel and want a simple interface they can actually use.

APP NAME:

Project Pulse (you can suggest a better name if you like)

CORE FEATURES:

Each project should include:

• Project Name
• Project Manager
• Department (dropdown)
• Stakeholders (multi-text)
• Start Date / End Date
• Priority (High, Medium, Low)
• Partners (internal/external)
• % Complete (progress bar)
• Status: Upcoming, In Progress, Completed, Delayed

USERS & ROLES:

• Admin: Full access, can approve deadline extensions
• Department User: View their department's projects
• Project User: View/edit assigned projects

FUNCTIONALITY:

• Responsive layout
• Create/Edit/Delete projects
• 3-day deadline alert with admin review
• Real-time notification system
• Theme toggle
• Export filtered projects to CSV
• Store in PostgreSQL via Prisma

TECH STACK:

• Frontend: Next.js + React + Tailwind CSS
• Backend: PostgreSQL (Prisma ORM)
• No auth required yet (optional later)
• Clean file structure: components, pages, utils

YOUR TASK:

• Start with planning: list folders and files
• Then generate the code step-by-step
• Add comments and extended thinking
• ▶️ Watch the full tutorial on YouTube
• 💾 Source Code on GitHub
• 🧪 Live Demo (Vercel Preview)

💡 Have a question about the prompt, code, or app structure?

→ Drop a comment on the video, and I’ll reply or update this page for others too.

By Atef Ataya

Hi, I’m Atef Ataya — a software developer with over 21 years of experience building large-scale systems and leading digital transformations.

Read More