📰 Originally published on Securityelites — AI Red Team Education — the canonical, fully-updated version of this article.
💻 MASTERING CODING WITH AI FREE
Day 4 of 5 · 80% complete
Today is the day that converts everything from the first three days into something tangible. You’re going to build a complete, working, deployed tool — something with a real URL that you can share with someone and they can actually use. Not a tutorial exercise. Not a fragment. A complete tool, built by you, deployed by you, using AI as your development partner.
The tool I’m going to walk you through is a security-themed password strength and breach awareness tool — relevant, useful, and perfectly scoped for a single-day project. But I’ll also give you the full framework to build anything else if you have a different project in mind. The process is identical regardless of what you build.
By the end of today you’ll have something you can put on a CV, share in a portfolio, use with your team, or simply feel proud of having made. Let’s build it.
🎯 What You’ll Master in Day 4
The six-stage build process from idea to deployed URL
How to break any project into AI-manageable pieces
Building a complete security awareness tool from scratch
Three deployment options — which to use for which type of project
A live, public URL for a tool you built yourself
⏱ 30 min read + 60–90 min building · Browser + Replit account (free) 📋 Before You Start:
- Completed Days 1, 2, and 3
- Have a free Replit account — takes 2 minutes to create
- Access to any AI chatbot for code generation
- Understanding of: five-component prompts, iterative prompting, debug loop, behavioural testing
Build a Real Tool With AI Coding — Day 4 of 5
- The Six-Stage Build Process
- Stages 1 and 2 — Spec and Decompose
- Stage 3 — Scaffold the Complete Tool
- Stage 4 — Test and Iterate
- Stage 5 — Deploy: Three Options
- Stage 6 — Share and Document
- Other Project Ideas — Same Process, Different Tools
- Questions and Answers
Everything in Days 1–3 was preparation for today. The mental model, the prompting stack, the debugging loop — all of it is infrastructure for this build session. Our own password strength checker is a good reference for what we’re building — today you create your own version with your own design and features. And when you’re done, Day 5 covers how to check it for security issues before you share it with anyone.
The Six-Stage Build Process
I’ve built enough tools with AI assistants to have a consistent process that works reliably. Six stages. Done in order. Each stage has a clear output that feeds the next one.
The six stages: Specify → Decompose → Scaffold → Test → Deploy → Document.
Most beginners skip stages 1 and 2 entirely and jump straight to prompting. That’s why they get messy, hard-to-debug code. The first two stages take ten to fifteen minutes and make every subsequent stage faster and more reliable.
Let me walk through all six with the project for today — a Password Security Awareness Tool — which will have three features: a strength checker, a common password detector, and a tips section. Exactly the kind of tool you’d send around to a team or post on a site.
Stages 1 and 2 — Spec and Decompose
Stage 1 — Write the specification. Full IPO model. All five prompt components. Before you open an AI window. This is the architect’s blueprint.
TODAY’S PROJECT — FULL SPECIFICATION Copy
CONTEXT: A security awareness tool for teams. Will be shared as a URL. Non-technical users. Dark, professional design.
TOOL NAME: Password Security Checker
FEATURE 1 — Strength Checker: Input: text box where user types a password Process: check 4 criteria: 12+ chars, 1+ uppercase, 1+ number, 1+ special char Output: colour-coded score (Weak=red, Fair=amber, Strong=green) + which criteria are met (checkmarks) + one improvement tip Updates in real time as user types. Never show the password in plain text in DOM.
FEATURE 2 — Common Password Check: Input: same password field, triggered by button click “Check Against Common Passwords” Process: check against a built-in list of the 50 most common passwords Output: red warning if found (“⚠️ This is one of the most common passwords — do not use it”), green tick if not found
FEATURE 3 — Tips Section: Static section below the tool. Five numbered tips for creating strong passwords. Professional, practical, no jargon.
LANGUAGE: Single HTML file. Embedded CSS and JavaScript. No external libraries or CDNs.
FORMAT: Complete file ready to run. Comments on each major section. After the code, list what I need to do to deploy it on Replit.
CONSTRAINTS: No network requests. All processing in browser only. Do not log or store any input. Input must be sanitised before any DOM insertion. Handle empty input gracefully (no crash, no error message — just blank state). Stage 2 — Decompose into pieces. Even for a single-file tool, thinking about the pieces prevents confusion during building. My decomposition for this tool:
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