Book 2: Time Boxing Overview
What Is Offer Driven Development?
Section titled “What Is Offer Driven Development?”Most builders fall into the same trap: they build first, then try to sell. A weekend goes into an app. It works. It looks clean. And then nothing. A handful of downloads. Zero paying customers. The cycle starts again.
AI coding tools have made this worse, not better. Claude Code, OpenAI Codex, Gemini CLI: any of them can ship a working app in a day. That speed is brilliant. It is also dangerous. Speed without direction just means you build the wrong thing faster.
Offer Driven Development (ODD) flips the sequence. Instead of build then sell, you sell then build.
Before you write a line of code, you define the offer. What transformation are you promising? Who is it for? What will they pay? Then you ask ten people if they would pay for it. Not “do you think this is a good idea?” (everyone says yes to that). “Would you pay £10 for this?” That question gets honest answers.
If seven out of ten say yes, you build. If three say yes, you fix the offer. If zero say yes, you have saved yourself a wasted weekend.
In Book 2, the lens is time management. Everyone has the same 24 hours. Most people feel like they never have enough. Time boxing is a proven technique for reclaiming control over the day, and the app you build here turns that technique into a structured, trackable system.
The VOSS Framework
Section titled “The VOSS Framework”ODD is the philosophy. VOSS is the system that makes it work. Four stages, each building on the last:
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Vault. Structure your knowledge in Obsidian. Your skills, stories, and expertise go into a structured vault that feeds everything after it.
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Offer. Sell a £10 PDF that describes the offer in detail to 10 early adopters on Gumroad. Score it using the Hormozi Value Equation. The goal: ten people pay £10 before you build anything. That is £100 and proof your idea has legs.
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Ship. Build and deliver using SpecKit. You only build what the offer requires. Nothing more. This constraint prevents feature creep.
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Scale. Grow beyond the 10 with outreach. Warm outreach, social content, and selling skills turn ten early customers into a real business.
In this Book Lab, the VOSS framework is not a separate set of guides. Each stage has its own dedicated page, tailored to the Time Boxing project you are building.
What You Will Build
Section titled “What You Will Build”You will build a Time Boxing mobile application using OpenAI Codex as your AI coding partner. The app lets users create focused work sessions with fixed durations, track their progress throughout the day, and review how they spend their time each week.
The app has three screens:
- Today: a daily timebox list showing scheduled and completed sessions, with a floating action button to create new timeboxes quickly
- Review: a weekly summary with total hours, category breakdown bar chart, and completion rate percentage
- Settings: default duration picker, category management (add, rename, reorder), and a light/dark theme toggle
Categories include Work, Learning, Health, Personal, and Creative. Each timebox has a title, category, duration, type (hard or soft deadline), start time, and optional notes.
No account. No cloud. Everything stays on your phone.
The time boxing app is a teaching vehicle. What you are learning is the ability to build and sell any digital product, with any AI tool, for any audience. The methodology is the product. The app is the proof that it works.
What Are Skills?
Section titled “What Are Skills?”Throughout this Book Lab you will see references to skills. These are pre-written instruction files that give your AI coding tool specialised knowledge about a particular task. For example, the vault-validator skill knows the exact folder structure, required files, and YAML frontmatter rules for a CoEngineers vault. The offer-validator skill knows how to score your offer against the Hormozi Value Equation.
Skills auto-activate when you describe a task in plain language. If you type “validate my vault,” the vault-validator skill kicks in automatically. If you type “score my offer,” the offer-validator skill takes over.
You need to download the skills starter before starting — the Prerequisites page has the download links for each AI tool.
Your Learning Path
Section titled “Your Learning Path”Each page in this Book Lab follows a stage of the VOSS framework:
| Page | VOSS Stage | What You Will Do |
|---|---|---|
| Vault | Vault | Set up your Obsidian vault for the Time Boxing project |
| Offer | Offer | Define, validate, and sell your offer to 10 early adopters |
| Ship | Ship | Build the Time Boxing app using OpenAI Codex and SpecKit |
| Scale | Scale | Grow beyond your first 10 with outreach and content |
What Comes Next
Section titled “What Comes Next”Head to the Vault page to set up your Obsidian vault for the Time Boxing project. This is the first stage of the VOSS framework and takes approximately 30 minutes with your LLM.